Distributed Generation – Information Pack

DISTRIBUTED GENERATION

INFORMATION PACK

Issue 1.5 December 2017

DDiissttrriibbuutteedd GGeenneerraattiioonn Guidelines & Application Form

For small generators – total capacity less than 10 kW (Simplified Approval Process – Part 1A)

Issue 1.5 / 20 December 2017 Installing distributed See the attached guide for generation with a  This document is subject to details of each numbered step. capacity less than change without any prior notice. 10 kW Interpretation: Please ensure you have the (Simplified Process) Generator - is referred to the person or an latest version. organisation that owns or operates distribution START HERE generators. 1 Note: The Generator can apply for Typically smaller distributed generation systems approval under “Simplified Process” if of this size are rotating (turbine) based systems, the system meets all requirements System Selection solar photovoltaic panels, etc. presented in the “System selection”

section. Application Process 2 Note: The Generator will submit the Within 2 business days of receiving the application accompanied with the application, Westpower will advise the Generator additional information and the Submission of that the application has been received. If no application fee. Application response is received within this period, the Generator should contact Westpower. 3 Notes: Within 10 business days of receiving the complete application, Westpower will inspect 1. Westpower will assess the application the distributed generation system and provide for completeness and deficiencies as the final approval. well as compliance with Congestion Westpower will provide the Generator with a Management Policy. Application Approval time and date for the inspection within 2 2. If there are any deficiencies identified Process business days. during the approval process, Westpower will notify the Generator The Generator has to remedy the deficiencies within 10 business days, with what is and pay the applicable fees within 10 business required to correct these deficiencies. days. 4 Notice of Intention to Note: This stage does not apply to the Simplified Approval Process. Proceed Connection Process 5 Note: The regulated terms for the connection Connection Contract and operation stated in the Schedule 6.2 Part 6 Negotiation apply unless both parties agree to substitute them with a connection contract. 6 Note: At this stage the Generator can Contact your Note: A new meter may be fitted at the connect the distributed generation to Generator’s location, by either the Generator or Westpower’s network. Electricity Retailer the Retailer. 7 Note: This stage does not apply to the Installation, Testing and Simplified Approval Process. However, the detailed information provided at this stage is Inspection relevant for installation and testing of the distributed generation. 8 Connection Completion Note: The Generator must provide Westpower with a copy of CoC within 10 business days of and Benefits approval of the connection.

Page 1 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

DDiissttrriibbuutteedd GGeenneerraattiioonn Guidelines & Application Form

For small generators – total capacity less than 10 kW (Standard Approval Process – Part 1)

Issue 1.4 / 14 April 2015 Installing distributed See the attached guide for generation with a  This document is subject to details of each numbered step. capacity less than change without any prior notice. 10 kW Interpretation: Please ensure you have the (Standard Process) Generator - is referred to the person or an latest version. organisation that owns or operates distribution START HERE generators. 1 Typically smaller distributed generation systems System Selection of this size are rotating (turbine) based systems, solar photovoltaic panels, etc. Application Process 2 Note: The Generator will submit the application accompanied with the additional information and the application fee. Submission of Application Within 5 business days of receiving the application, Westpower will send to the Generator a written notice advising whether the application is complete or not. 3 Note: Westpower will send a written notice to the Generator, stating whether the application is approved or declined within 30 business days Application Approval after the date of receipt of a completed Process application. Extension of time by mutual agreement of up to 20 business days may be granted by the Generator. 4 Note: The Generator must give a written notice Notice of Intention to to Westpower confirming whether or not he intends to proceed with the connection, within Proceed 10 business days after the day on which the notice of approval has been received. Connection Process 5 Connection Contract Note: Both parties must, in good faith, attempt to negotiate a connection contract within 30 Negotiation business days. 6 Contact your Note: A new meter may be fitted at the Generator’s location, by either the Generator or Electricity Retailer the Retailer. 7 Note: The Generator must comply with all Installation, Testing and regulations and local bylaws. The Generator must use a Registered Electrician who is Inspection required to follow the latest AS/NZS 4777 plus all other NZ safety regulations and standards. 8 Note: Westpower will credit your retailer for a Connection Completion portion of the delivery charge for each month by netting off the exported energy from the and Benefits imported energy, subject to the net variable charge never being less than zero.

Page 2 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

Contents

Guide to installing distributed generation with capacity less than 10kW 4

1 System Selection 4

2 Submission of Application 5

3 Application Approval Process 6

4 Notice of Intention to Proceed 7

5 Connection Contract Negotiation 7

6 Contact your Electricity Retailer 7

7 Installation, Testing and Inspection 9

8 Connection Completion and Benefits 10

Glossary 10

Application for Connection and Operation of a Distributed Generation System up to 10 kW in total to Westpower’s Network 12

Page 3 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

Guide to installing distributed generation with capacity less than 10kW

This information guide is intended for individuals or organisations wishing to connect distributed generation with a total capacity less than 10 kW to Westpower’s electricity network for the purpose of generating into the grid and selling electricity. This is a one-stage application process.

For larger systems above 10 kW there are separate guidelines.

The information provided in this guide is of general nature and the owners of distributed generation must discuss their intentions with Westpower before connecting their distributed generation system to the network.

Westpower will assist you with the connection process as distributed generation of this size can require changes to your connection to the electricity network.

To understand the various terms used in this guide, please refer to the glossary at the back of this guide.

This guide does not apply to generation systems that are stand-alone and have no connection to Westpower’s electricity network.

1 System Selection The likely distributed generation technology for systems with a capacity less than 10 kW will be rotating plant, such as turbines (wind, steam, hydro, etc) or large arrays of solar panels. At the upper end of the range, systems are likely to have a three-phase output. If so, you will need a three-phase connection to Westpower’s network. You need to consider your connection to the network in this regard.

Depending on your system selection, you can choose between two options of processing your application:

a. simplified approval process;

b. standard approval process.

In order to be able to submit your application under the simplified approval process, your system has to meet the following requirements:

- to be designed and installed in accordance with the latest AS/NZS 4777.1;

- to incorporate an inverter that has been type-tested and issued a Declaration of Conformity (DoC) with all relevant parts of the latest AS/NZS 4777.2 by a laboratory with accreditation issued or recognised by International Accreditation New Zealand;

- to have protection settings that meet Westpower’s connection and operation standards or in accordance with the latest AS.NZS 4777.2;

- to comply with Westpower’s connection and operation standards and congestion management policy.

If your system does not meet all the requirements presented above, you have to submit your application under the standard approval process.

Generation systems that are less than 10 kW in capacity are unlikely to have any significant effect on Westpower’s network, but may require some modifications to be carried out which can affect your connection to the network. All distributed generation systems must comply at all times with the requirements of the Health and Safety in Employment Act 1992,

Page 4 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. Electricity Act 1992 and the regulations and rules made under the Electricity Act 1992. The distributed generation must comply with Westpower’s connection and operation standards (Westpower Distribution Code).

For this reason, Westpower recommends that you contact ElectroNet Services Ltd., to make sure that your distributed generation complies with all requirements prior to submitting the application. Extra charges may be incurred.

ElectroNet Services Limited is the wholly owned subsidiary of Westpower Limited, and as such, will be the contractor involved in all dealings with respect to distributed generation.

Westpower may, from time to time, include in the pocket of the folder, product brochures from suppliers of distributed generation equipment. Westpower has no affiliation with these suppliers and accepts no responsibility for any information supplied in this manner.

Costs of these distributed generation systems vary widely depending on the technology and the installation; these matters should be discussed with the supplier.

2 Submission of Application

Any person or organisation, who wishes to connect distributed generation capable of generating electricity at a rate of 10 kW or less in total, must apply to Westpower by using the application form attached to this guideline and provide any information in respect of the distributed generation proposed to be connected.

If the application is for an increase in capacity for an existing connection, you must provide extra information about the size (nominal capacity) of the additional generation and the total size (nominal capacity) of all generators at the point of connection.

If you decide to apply for approval to connect your distributed generation system under the simplified approval process, then the application must include the following information:

a. the name and contact details of distributed generation owner and, if applicable, the distributed generator’s system installer details;

b. the installation control point (ICP) identifier (if known at the time of application);

c. the physical location of the distributed generation installation;

d. the nameplate capacity of your distributed generation;

e. the distributed generation type (eg. solar, wind, hydro, liquid fuel, etc.)

f. the make and model of inverter to be installed and the information as to whether the inverter:

a. is included on Westpower’s published list of approved inverters; (if the inverter is not included in the published list of approved inverters, then the application must include a copy of the inverter’s DoC with the latest AS/NZS 4777)

b. conforms with the protection settings specified in Westpower’s connection and operation standards;

g. the application fee.

Page 5 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. Within 2 business days of receiving the application under the simplified process, Westpower will advise you that the application has been received. If you didn’t receive any response from Westpower within this period, you should contact Westpower.

Otherwise, if you apply for approval to connect your distributed generation system under the standard approval process, the application form has to be accompanied by the following attachments:

a. information about the name plate rating (if known), or other suitable evidence that the generating unit is (or will be) only capable of generating electricity at a rate of 10 kW or less;

b. detailed information about the inverter and/or battery (if applicable);

c. technical specification of the equipment that allows the distributed generation to be disconnected from the network on loss of mains voltage;

d. information and justification showing how the distributed generation complies with the latest AS/NZS 4777 standard (where appropriate);

e. information and justification showing how the distributed generation complies with the Westpower’s connection and operation standards;

f. the application fee.

Within 5 business days from the date when the application has been received under the standard process, Westpower will advise you in writing whether or not your application contains all the information required.

3 Application Approval Process Based on the information provided in the application, Westpower will assess whether:

a. the distributed generation will comply at all times with the requirements of the Health and Safety in Employment Act 1992; and

b. the will comply at all times with the Electricity Act 1992, and the regulations and rules made under this Act;

c. the connection of the distributed generation complies with Westpower’s connection and operation standards (Westpower’s Distribution Code); and

d. the application should follow the simplified or standard approval process.

If your application contains all the documentation required and has been submitted to be processed under the simplified approval process, then Westpower will inspect your distributed generation system and provide you with the final approval notice within 10 business days from the receipt of your application. Westpower will give 2 business days’ notice of a time and date when the inspection will be carried out.

If there are any deficiencies identified during the approval process, Westpower will notify you within 10 business days, with what is required to correct these deficiencies. You have to remedy these deficiencies and pay the applicable fees within 10 business days from notification in order to have your application approved.

Otherwise, if the application has been submitted to be processed under the standard approval process, Westpower will notify you in writing whether the application has been approved or declined within 30 business days following the date when the application was received.

Page 6 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. Due to situations which occasionally arise, Westpower may seek an extension of the application processing time. In these circumstances, Westpower will notify you in writing specifying the reasons for the delay and the amount of additional time required to process the application. You may grant an extension of up to 20 business days and must not unreasonably withhold consent to the extension.

4 Notice of Intention to Proceed Note: This stage does not apply to applications submitted to be processed under the simplified approval process.

If the application is approved, a written notice must be provided to Westpower confirming whether or not you as “The generator” intend to proceed with the connection and, if so, confirming the details of the generation to be connected.

Notice must be given within 10 business days after the day on which Westpower gives notice of approval to connect distributed generation or, within a longer period of time mutually agreed between Westpower and you.

Failure to give written notice to Westpower within the time limit specified, the application will be considered cancelled and Westpower’s responsibilities under Electricity Industry Participation Code 2010 (Part 6 - Connection of distributed generation) will no longer apply. This does not prevent you from submitting a new application for connection of distributed generation at a later, subsequent date.

5 Connection Contract Negotiation All applications processed under the simplified approval process will be governed by the regulated terms for the connection and operation unless both parties agree to substitute them with a connection contract.

Under the standard approval process, both the applicant and Westpower have 30 business days, after receiving the written notice of intention to proceed, during which they must, in good faith, attempt to negotiate a connection contract.

If no connection contract has been negotiated by the expiry of the negotiating period, the regulated terms attached to this guideline will apply for the connection of distributed generation.

The period for negotiating a connection contract may be extended by mutual agreement between both parties.

6 Contact your Electricity Retailer You must discuss your Generator scheme with an electricity retailer as you may be selling any surplus of energy (exported energy) back to them. You can purchase from, and sell to, any retailer trading in Westpower’s area.

The electricity retailers currently operating on Westpower’s Network are:

- TrustPower - Meridian Energy - Mighty River Power - Genesis Energy - Contact Energy Agreement with an electricity retailer and you must be completed before you can connect your generator to the Westpower network. This is explained in the next section.

Page 7 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

A new meter may need to be installed

Your retailer is responsible for your metering installation. When you contact a retailer, you need to discuss with them the fitting of a new meter, or ask if your present meter will be suitable. The complexity of the metering required will depend on the contract you have arranged with the retailer who is purchasing your exported power.

Your electricity retailer will advise you of any rental costs and data handling fees associated with this metering.

Minimum metering requirements

You will usually need a full “import/export” metering system that measures in each half hour the energy (kWh) used (imported) or injected back into the system (exported).

You can own the meter yourself, or your retailer or meter provider may choose to own it and lease it to you.

This type of metering will need access to a phone line, or could be fitted with a cellular modem, to allow it to be remotely interrogated.

Where the volumes of exported electricity are not likely to be large, you may be able to use a simpler type of metering which uses a second meter to measure the quantity of electricity exported, but will not provide the information of when it was exported.

The simplified metering is illustrated below. While this diagram shows single-phase metering, three-phase metering could be connected in a similar manner. Metering of this type will usually be rented from your retailer who will advise you of any rental costs for this meter, which may only be a few cents per day.

In addition there may be a tariff / meter change fee, depending on your location and your existing metering.

Reverse run stop

If the above simplified metering arrangement is used, it may be only possible for you to purchase from, and sell to, the incumbent retailer. This is because an independent retailer would have to “profile” the energy you have generated.

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7 Installation, Testing and Inspection Note: This stage does not apply to applications submitted to be processed under the simplified approval process. However, the information provided below is relevant for the installation and testing of your distributed generation.

The installation must be undertaken by qualified personnel to ensure compliance with all required building and electrical codes and standards. All wiring associated with the system must comply with AS/NZS 3000 - Electrical Installations (Australian/New Zealand Wiring Rules) or any successive standard or legislation, and be undertaken by a registered electrician where required by legislation. You must also ensure that all building and other consents required are obtained, by discussing the proposal with your local council.

Safety comes first in connection of any generation equipment; safety to you, and safety to others connected to, or working on, Westpower’s electricity network. If your generator continued to operate when there was a power cut, you could cause Westpower’s electricity network to become active at a time it was assumed to be dead. This could cause serious harm to anyone working on the network, and/or damage to your equipment.

A system complying with Australian/New Zealand Standard (AS/NZS 4777) and having its protection installed in accordance with this standard as well, will provide isolation and prevent this happening.

Your registered electrician should closely follow the latest AS/NZS 4777.1 for Installation requirements. This Standard is available from http://www.standards.govt.nz or http://www.standards.com.au, where it can be downloaded.

While AS/NZS 4777.1 deals primarily with the connection of inverter based systems, the principles covered by this standard shall also be followed for distributed generation systems that do not employ inverters. Also, the EEA – “Guide for the Connection of Generating Plant” may assist you with determining the most appropriate electrical arrangements for the connection and protection of the distributed generator. It can be downloaded from www.eea.co.nz website.

The installation must also comply with Westpower’s Distribution Code.

Please note that after your application has been approved under the standard approval process and the steps outlined above are completed, as a minimum you must:

a. test and inspect your distributed generation before connection;

b. give Westpower adequate notice of the tests and inspection – we may send qualified personnel to the site to observe the testing and inspection;

c. provide Westpower with a written test report when testing and inspection is complete, including suitable evidence that the metering installation complies with the metering standards in the regulations; and

d. pay the fee specified by Westpower for observing the testing and inspection, up to the maximum fee prescribed in Schedule attached.

Whether or not you entered into a connection contract with Westpower before the period for negotiating a connection contract, you must complete the testing and inspection presented above prior to the connection of your distributed generation.

If you have entered into a connection contract with Westpower, your distributed generation will be connected in accordance with that contract as soon as practicable. Otherwise,

Page 9 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. Westpower will connect the distributed generation on the regulated terms as soon as practicable after the expiry of that period. 8 Connection Completion and Benefits Once the connection has been completed, you and Westpower must perform all obligations under the negotiated connection contract or regulated terms, in accordance with connection and operation standards.

If the application was approved under the simplified approval process, you must send to Westpower as soon as available, but no later than 10 business days after the approval of the application, a copy of the Certificate of Compliance issued under the Electricity (Safety) Regulations 2010 that relates to your distributed generation and the ICP number if this wasn’t provided in the application.

As owner of the distributed generation installation, you will need to negotiate a contract for the amount of electricity that is sold to an electricity retailer or, to another party via an electricity retailer.

Westpower will credit your retailer for a portion of the delivery charge for each month by netting off the exported energy from the imported energy, subject to the net variable charge never being less than zero.

Glossary Act means Electricity Industry Act 2010.

AS means Australian Standard.

Business day is considered as any day of the week other than Saturday, Sunday, or a public holiday (within the meaning of the Holidays Act 2003).

CoC means Certificate of Compliance under the Electricity (Safety) Regulations 2010.

Code means Electricity Industry Participation Code 2010.

Connect, in relation to distributed generation, means to be connected to a distribution network or, to a consumer installation that is connected to a distribution network.

Distributed generation means equipment used, or proposed to be used, for generating electricity that:

a. is connected, or proposed to be connected, to a distribution network, or to a consumer installation that is connected to a distribution network; and

b. is capable of injecting electricity into that distribution network.

Distribution network means the electricity lines, and associated equipment, owned or operated by Westpower, but does not include:

a. the national grid; or

b. an embedded network that is used to convey less than 2.5 GWh per annum.

Distributor means a person who supplies line function services to any other person or persons (such as Westpower).

DoC means Declaration of Conformance to the requirements of the latest AS/NZS 4777.2.

Generator means a person who owns or operates distributed generation.

Page 10 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. Any term that is defined in Electricity Industry Participation Code 2010 (Part 6 - Connection of distributed generation) and not defined in this guideline has the same meaning as in the Code.

Page 11 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

Application for Connection and Operation of a Distributed Generation System up to 10 kW in total to Westpower’s Network

Written agreement from Westpower must be obtained before the system can be connected to Westpower’s network Please return completed form to: Westpower Limited Phone: 03-768 9300 PO Box 388, Greymouth Fax: 03-768 2766 Details of a person/organisation applying to connect a Details of Distributed Generator Distributed Generator to be installed Approval Process: Name: ______Simplified Standard

Company: ______Connection: Existing New Address: ______Residential Commercial

______Expected Connection Date: ______

Phone: ______Manufacturer Rating of Equipment:

Cell phone: ______Amps: ______kW: ______

Volts: ______kVA: ______Fax: ______Number of Phases: Email: ______Single Phase Three Phases

Details of customer at premises where a Distributed Type: Generator is to be connected (if different from above) Solar PV Wind Turbine Micro Hydro

Name: ______Gas Turbine Steam Turbine Fuel Cell

Company: ______Other (please specify)

Address: ______

______Connected Voltage: ______

Phone: ______Inverter and/or Battery Details (if applicable):

______Cell phone: ______Fax: ______

ICP of Installation (from power account): Name of Electrical Contractor:

Certificate of Compliance No: System complies with the latest AS/NZS 4777 (where appropriate) Yes, Information attached Not applicable

Equipment that allows the generator to be System complies with Westpower’s Distribution disconnected from network on loss of mains Code voltage: Technical Specification Attached Yes, Information attached

FAILURE TO COMPLETE ALL SECTIONS OF THIS FORM MAY RESULT IN DELAYS PROCESSING THIS APPLIATION I hereby apply to connect a distributed Generator to Westpower’s Network and confirm that the above information is correct:

Signed: ______Name (please print): ______

Date: ______

Westpower agrees to the connection of the above Distributed Westpower does not agree to the connection of the above Generator to Westpower’s Electricity Network Distributed Generator to Westpower’s Electricity Network

Signed: ______Signed: ______

Name (please print): ______Name (please print): ______

Date: ______Date: ______

Page 12 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

Page 13 of 13 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

DDiissttrriibbuutteedd GGeenneerraattiioonn Guidelines & Application Form

For medium and large generators – total capacity greater than 10 kW

Issue 1.5 / 20 December 2017 Installing distributed See attached guide for generation with a  This document is subject to details of each numbered step. capacity greater than change prior any notice. 10 kW Interpretation: Please ensure you have the Generator - is referred to the person or an latest version. START HERE organisation that owns or operates distribution generators. 1 Usually distributed generation above 10kW will System Selection be diesel, wind generation, hydro, gas or co- generation. 2 Initial Application Process – Note: The Generator will submit the initial Stage I application accompanied by additional information and the application fee. Submission of Initial Application Within 5 business days of receiving the application, Westpower will send to the Generator a written notice advising whether the application is complete or not. 3 Note: Westpower will send to the Generator Initial Application information relevant to the application within 30 business days after the date of receipt Evaluation Process of a completed application.

4 Note: The Generator may request further information that is reasonably necessary to enable the Generator to consider and act on Stage I Completed the information given to him. Westpower will provide this information within 10 business days of the request being received. 5 Final Application Process – Submission of Final Note: The Generator must make a final Stage II application, no later than 12 months after Application receiving the information at Stage I. 6 Note: Westpower will send a written notice to the Generator, stating whether the application is successful or not within: - 45 business days (capacity ≤ 1MW) Final Application - 60 business days (1MW < capacity< 5MW) Approval Process - 80 business days (capacity ≥ 5MW) After the date of receipt of final application. One or more extension of time by mutual agreement of up to 40 business days may be granted by the Generator. 7 Note: The Generator must give a written notice to Westpower confirming whether or not he Notice of Intention to intends to proceed with the connection, within Proceed 30 business days after the day on which the notice of approval has been received.

Continued on the next page

Page 1 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. Continued from previous page 8 Connection Process Connection Contract Note: Both parties must, in good faith, attempt to negotiate a connection contract within 30 Negotiation business days. 9 Contact your Note: A new meter may be installed at the Generator’s location, either by the retailer or Electricity Retailer the “Generator”. 10 Note: The Generator must comply with all regulations and local bylaws. The Generator Installation, Testing and must use a Registered Electrician who must Inspection follow the latest AS/NZS 4777 standard as well as all other NZ safety regulations and standards. 11 The income from this generation will Note: Westpower will credit your retailer for a depend on the price negotiated with the Connection Completion portion of the delivery charge for each month retailer. by netting off the exported energy from the and Benefits imported energy, subject to the net variable charge never being less than zero.

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Contents

Guide to Installing Distributed Generation with Capacity Greater than 10kW 4

1. System Selection 4

2. Submission of Initial Application 5

3. Initial Application Evaluation Process 5

4. Stage I Completed 5

5. Submission of Final Application 6

6. Final Application Approval Process 6

7. Notice of Intention to Proceed 7

8. Connection Contract Negotiation 7

9. Contact your Electricity Retailer 7

10. Installation, Testing and Inspection 8

11. Connection Completed - Benefits 9

Glossary 9

Application for connection and operation of a distributed generation system above 10 kW in total to Westpower’s network 10

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Guide to Installing Distributed Generation with Capacity Greater than 10kW

This informational guide is for individuals or organisations who want to connect medium to large distributed generation systems (above 10kW) to Westpower’s distribution network, to generate electricity and possibly export energy into our network. These systems are usually three-phase, and are typically installed at industrial, commercial or rural sites. Any agreement to connect distributed generation to our network may include costs associated with design and reinforcement of the existing network. If network reinforcement is required, the design and schedule for this project work will need to be factored into your installation planning. Projects may also be constrained by network resources and restrictions. Larger generators (above 1000kW) may be subjected to Transpower's terms and conditions. If this is the case, we will facilitate responses to Transpower's requests. The Generator (owner) will be responsible for providing any requested information to us to assist in the process. Distributed generation must meet all relevant statutory and regulatory requirements and comply with all applicable safety standards. If a distributed generator is connected to our network, the Generator is responsible for safety equipment and procedures must be in place to ensure safe interaction between your distributed generator and our network. More information about distributed generation is available on the Electricity Authority’s website: http://www.ea.govt.nz For information about connecting smaller distributed generation, see “Guide to installing distributed generation with capacity less than 10kW”.

These requirements apply to all existing or prospective distributed generators that may operate in parallel with the distribution network regardless of whether energy is exported or not.

These requirements do not apply to generators that have no connection to the distribution network.

1. System Selection

Usually distributed generations above 10kW are diesel or wind generation and occasionally hydro, gas or co-generation. Your system must comply at all times with the requirements of the Health and Safety in Employment Act 1992, Electricity Act 1992 and the rules and regulations made under the Electricity Act 1992. Your distributed generation system must also comply with the Westpower connection and operation standards (Westpower Distribution Code). For this reason, Westpower recommends to contact ElectroNet Services Ltd., to make sure that your distributed generation complies with all these requirements prior to submitting the application. Extra charges may be incurred. All distributed generators connected directly to Westpower’s low voltage distribution network shall, as a minimum requirement, comply with the requirements of the “EEA Guide for the Connection of Generating Plant” (http://www.eea.co.nz) and shall be installed in accordance with NZECP4:1993 and/or NZS/AS 3000:2000 - Electrical Installations (known as the Australian/New Zealand Wiring Rules) or any subsequent revision.

The general requirements outlined in the latest AS/NZS 4777 shall also be followed, where the generation plant uses inverters. The presence of distributed generation shall not restrict Westpower’s requirements for switching on the distribution network.

Page 4 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. 2. Submission of Initial Application

Any person or organisation who wishes to connect distributed generation that is capable of generating electricity at a rate above 10 kW in total, must apply to Westpower by using the application form attached to this guideline and provide any information in respect of the distributed generation proposed to be connected. If the application is for an increase in capacity for an existing connection, the generator has to provide information about the size (nominal capacity) of the additional generation and the size (nominal capacity) of all generators at the point of connection. The application form has to be accompanied with detailed information as requested in the form and the application fee. Within 5 business days from the date when the application has been received, Westpower will advise you in writing whether or not your application contains all the information required.

3. Initial Application Evaluation Process

Within 30 business days of receiving your completed initial application Westpower will provide you with the following information: a. the capacity of our network, including both the design capacity (including fault levels) and actual operating levels; b. the extent to which connection and operation of your distributed generation may result in a breach of the relevant standards for safety, voltage, power quality, and reliability of supply to other connected parties; c. any measures or conditions (including modifications to the design and operation of our network or to the operation of your distributed generation) that may be necessary to address the matters referred to in paragraphs (a) and (b); d. the approximate costs of any network-related measures or conditions identified under paragraph (c) and an estimate of time constraints or restrictions that may delay the connecting of your distributed generation; e. any further detailed investigative studies that we reasonably consider are necessary to identify any potential adverse effects on the system resulting from the proposed connection, together with an indication of: i. whether we agree to you, or a suitably qualified agent for you, undertaking those studies; or ii. if not, whether we could undertake those studies and, if so, the estimated cost of the studies that you would be charged; f. any obligations to other parties that may be imposed on us and that could affect your distributed generation (for example obligations to Transpower, in respect of other networks, or under the Electricity Industry Participation Code 2010); g. any additional information or documents that we consider would assist your application; and h. information about the extent to which planned and unplanned outages may affect the operation of your distributed generation.

4. Stage I Completed

You can request further information from us which is reasonably necessary to enable you to consider and act on the information provided to you in response to your initial application. We will provide this further information within 10 business days of the request being received.

Page 5 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. 5. Submission of Final Application

If you decide to proceed with the connection, you must submit to Westpower a final application together with the results of any investigative studies that were identified by Westpower under clause 3.(e) above, no later than 12 months after receiving the information for the initial application (stage I). After receiving your final application, Westpower will notify all other persons and organisations that made an initial application for connection of distributed generation on that particular part of the network, where Westpower’s decision would be affected by the connection of the distributed generation that is the subject of the final application. This notification will be made no later than 10 business days. Westpower may consider the final applications together as if they were competitive bids to use the same part of the distribution network and will consider the final applications in the light of the purpose of Part 6 of Electricity Industry Participation Code 2010 (Connection of distributed generation), if these final applications are received within 20 business days apart to each other. In any other case in which Westpower receives more than one final application relating to a similar part of the distribution network, Westpower will consider an earlier final application in priority to other final applications.

6. Final Application Approval Process

Westpower will assess, based on the information provided in the final application, whether:

a. the generator complies at all times with the requirements of the Health and Safety in Employment Act 1992;

b. the distributed generation complies at all times with the Electricity Act 1992, and the regulations and rules made under this Act; and

c. the connection of the distributed generation complies with Westpower’s connection and operation standards (Westpower’s Distribution Code).

Within the time frame specified below, Westpower will give you a notice in writing stating whether the application has been approved or declined. The time frame below is considered after the date of receipt of the final application.

Time frame for Westpower to process the final application

Distributed Generation Capacity Time Frame

• Less than 1 MW 45 business days

• Between 1 MW and 5 MW 60 business days

• Greater than 5 MW 80 business days

Due to situations which occasionally arise, Westpower may seek one or more extensions of the final application processing time. In these circumstances, Westpower will send you a notice in writing specifying the reasons and the additional time required for processing the application.

You may grant an extension of up to 40 business days and must not unreasonably withhold consent to an extension.

Page 6 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. 7. Notice of Intention to Proceed

Once the final application to connect your distributed generation is approved, you must provide a written notice to Westpower confirming whether or not you intend to proceed with the connection and if so, confirming:

a. the details of the generation to be connected; and

b. that you accept all the conditions (or other measures) which we have specified as conditions of the connection.

Notice must be given to Westpower within 30 business days after the day you received the approval to connect your distributed generation, or within a longer period of time mutually agreed between Westpower and you.

Failure to give prior written notice to Westpower within the time limit specified, the application will be considered cancelled and Westpower’s responsibilities under Electricity Industry Participation Code 2010 (Part 6 - Connection of distributed generation) will no longer apply. This does not prevent you from submitting a new application for connection of distributed generation at a later, subsequent date.

8. Connection Contract Negotiation

After the written notice of intention to proceed has been received by Westpower, both the applicant and Westpower have 30 business days (beginning on the date on which the Westpower receives the notice) during which they must, in good faith, attempt to negotiate a connection contract.

If no connection contract has been negotiated by the expiry of the period for negotiating a connection contract, the regulated terms attached to this guideline will apply for the connection of distributed generation.

The period for negotiating a connection contract may be extended by mutual agreement between both parties.

9. Contact your Electricity Retailer

You must discuss your generator scheme with an electricity retailer as you may be selling any surplus of energy (exported energy) back to them. You can purchase from, and sell to, any retailer trading in Westpower’s area.

The electricity retailers currently operating on Westpower’s Network are: • TrustPower • Meridian Energy • Mighty River Power • Genesis Energy • Contact Energy You need to have an agreement with an electricity retailer completed before you can connect your generator to Westpower network.

Page 7 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. 10. Installation, Testing and Inspection All wiring associated with the system must comply with AS/NZS 3000 - Electrical Installations (Australian/New Zealand Wiring Rules) or any successive standard or legislation, and be undertaken by a registered electrician, where required by the legislation. You must also ensure that all building and other consents required are obtained, by discussing the proposal with your local council.

A system complying with Australian/New Zealand Standard (AS/NZS 4777) and having its protection installed in accordance with this standard as well, will provide isolation and prevent this happening.

While AS/NZS 4777.1 deals primarily with the connection of inverter based systems, the principles covered by this Standard shall also be followed for Distributed Generation systems that do not employ inverters. Also, the EEA – “Guide for the Connection of Generating Plant” may assist you with determining the most appropriate electrical arrangements for the connection and protection of the distributed generator. It can be downloaded from the www.eea.co.nz website.

The installation must also comply with Westpower’s Distribution Code.

For generators above 10 kW that are connected to Westpower’s HV network, the minimum metering requirement will be to measure active and reactive energy, in half-hour intervals. This will require 4-quadrant “Time of Use” (TOU) metering to be installed. This metering will require either a telephone connection or a cellular connection for remote interrogation.

You should discuss the metering with your electricity retailer first, as they may install the required metering or choose to modify your existing metering.

Please note that after your application has been approved and the steps outlined above are complete, as a minimum you must:

a. test and inspect your distributed generation before connection;

b. give Westpower adequate notice of the tests and inspection – we may send qualified personnel to the site to observe the testing and inspection;

d. pay the fee specified by Westpower for observing the testing and inspection, up to the maximum fee prescribed in Schedule attached.

The following tests should be carried out on both generation and associated control equipment:

• secondary injection testing of all protection

• proof of tripping circuits for protection operation

• automatic synchronising and interlocking

• load and VARs sharing stability

• loss of mains testing

• and compliance of warning notices and labelling.

If you have entered into a connection contract with Westpower, your distributed generation will be connected in accordance with that contract as soon as practicable. Otherwise, Westpower will connect the distributed generation on the regulated terms as soon as practicable after the expiry of that period.

Page 8 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

11. Connection Completed - Benefits

Once the connection has been completed, you and Westpower must perform all obligations under the negotiated connection contract or regulated terms in accordance with connection and operation standards.

As owner of the distributed generation installation, you will need to negotiate a contract for the amount of electricity that is sold to an electricity retailer or to another party via an electricity retailer.

Glossary

Act means Electricity Industry Act 2010.

AS means Australian Standard.

Business day means any day of the week other than Saturday, Sunday, or a public holiday (within the meaning of the Holidays Act 2003)

CoC means Certificate of Compliance under the Electricity (Safety) Regulations 2010.

Code means Electricity Industry Participation Code 2010.

Connect, in relation to distributed generation, means to be connected to a distribution network or to a consumer installation that is connected to a distribution network

Distributed generation means equipment used, or proposed to be used, for generating electricity that:

a. is connected, or proposed to be connected, to a distribution network, or to a consumer installation that is connected to a distribution network; and

b. is capable of injecting electricity into that distribution network

Distribution network means the electricity lines, and associated equipment, owned or operated by Westpower, but does not include:

a. the national grid; or

b. an embedded network that is used to convey less than 2.5 GWh per annum

Distributor means a person who supplies line function services to any other person or persons (such as Westpower)

DoC means Declaration of Conformance to the requirements of the latest AS/NZS 4777.2.

Generator means a person who owns or operates distributed generation

Any term that is defined in Electricity Industry Participation Code 2010 (Part 6 - Connection of distributed generation) and not defined in this guideline has the same meaning as in the Code.

Page 9 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

Application for connection and operation of a distributed generation system above 10 kW in total to Westpower’s network

Please return completed form to: Westpower Limited Phone: 03-768 9300 PO Box 388, Greymouth Fax: 03-768 2766

A. Details of your proposed distributed generation

The owner of the distributed generator must provide sufficient information to Westpower to enable successful connection to the distribution network without affecting other connected Customers on the network.

For all existing electricity connections and, when applying for a new electricity connection we will evaluate the total export capacity of your proposed distributed generation (i.e. the maximum amount of electricity that your generation is able to inject into our network), to assess whether your proposed generation will exceed the capacity of your electricity connection. To complete this evaluation, we will need evidence of your generation capacity – normally a kilowatt rating.

Please attach to your application a copy of the manufacturer’s specifications and/or, a photograph of the “name plates” for your proposed generation as evidence of its capacity.

Additional information may be required if the manufacturer’s specifications are not comprehensive.

The extent of the information required will depend on the size and type of generation. This information will remain confidential between us unless agreed otherwise, however we reserve the right to release information about the distributed generation to meet our obligations to Transpower, the operator of the national grid, or as required by the Electricity Industry Participation Code 2010 (Part 6 - Connection of distributed generation).

We will use the information supplied in your application to evaluate and model our network to decide what method of connection would be needed and at which voltage level the connection should be made.

You must obtain written agreement from Westpower before you can connect your distributed generation to our network

Details of a person/organisation applying to connect a Details of customer at premises where a distributed distributed generator generator is to be connected

Name: Name:

Company: Company:

Address: Address:

Phone: Phone:

Cell phone: Cell phone:

Fax: Fax:

Email:

ICP of Installation (from power account): Connection: Existing New Residential Commercial

Expected Connection Date:

Page 10 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. B. Technical information required for distributed generators The information required to be supplied to Westpower for all distributed generation with a capacity greater than 10 kW is as follows: 1. Data required for each distributed generator

10÷100 100÷750 >750 Data required for range of power output kVA kVA kVA

Type of generator unit - synchronous, asynchronous, etc;   

Type of prime mover;   

Rated terminal Voltage (kV)   

Rated generator capacity (kVA);   

Rated minimum power factors (both over and under excited) at rated kVA;  

Maximum continuous active power generated (kW);   

Maximum short term active power generated (kW);  

For asynchronous generators, reactive power requirements (kVAr);   

Anticipated operating regime e.g. continuous, intermittent, peak lopping;   

Method of Voltage control;   

Generator transformer details, if applicable; 

2. Interface Arrangements

10÷100 100÷750 >750 Data required for range of power output kVA kVA kVA

The means of connection and disconnection;   

The means of synchronisation between the distribution network and the    distributed generator;

Generator neutral and earthing arrangements; 

3. Technical Data

10÷100 100÷750 >750 Data required for range of power output kVA kVA kVA

Lowest frequency at which the distributed generator can run 

Actual low frequency trip setting and time delay   

Actual over frequency trip setting and time delay.   

Minimum operating power; 

Generator kW/kVAr capability charts (at lower Voltage terminals at nominal and ±10% of nominal voltage) at:

(a) maximum short term power; 

(b) maximum continuous power;  

Page 11 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. (d) 50% output 

(e) minimum power 

Auxiliary power requirements at:

(a) Rated power output 

(b) Minimum power output 

Start up times to minimum operating power:

(a) From Cold 

(b) From Warm 

Normal ramp rate 

Time for cold start to full rated output;  

Inertia constant (secs) (whole machine); 

Stator resistance; 

Direct axis synchronous reactance; 

Quadrature axis synchronous reactance; 

Direct axis transient reactance; 

Quadrature axis transient reactance; 

Direct axis sub transient reactance; 

Quadrature axis sub transient reactance; 

Leakage (positive sequence) reactance; 

Negative sequence reactance; 

Zero sequence reactance; 

Earthing resistance/reactance; 

Time constants:

(a) Direct axis transient open circuit; 

(b) Quadrature axis transient open circuit; 

(d) Quadrature axis sub transient open circuit; 

Generator transformer details (impedance, tap changer, vector group, earthing,  maximum over voltage capability at rated frequency etc.);

Type of excitation system: (block diagram/specifications, forward/feedback   gains/time constants and limits);

Speed governor and prime mover data - detailed functional description of   governing system with all subsystems including system control and turbine time

Page 12 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version.

C. Control arrangements

It is preferable for distributed generators, subject to despatch, not to export reactive energy (kVArh) whenever real energy (kWh) is being exported onto the distribution network. Subject to network voltage remaining within agreed limits, the desired power factor should be between 0.85 and 0.9 – see sections 6 and 7 regarding islanding detection requirements.

Westpower will advise if continuously acting fast response automatic excitation and/or governor control systems are required to control the distributed generator voltage and frequency without instability over the entire operating range of the distributed generator. This will depend on the size and type of distributed generator and the characteristics of the part of the distribution network to which it is connected to.

D. Protection

The distributed generator shall be equipped with the appropriate protection elements as required by the “EEA Guide for the Connection of Generating Plant”. Distributed generator owners are to consult Westpower with regard to any special arrangements or protection that may be necessary due to the characteristics of the distribution network.

PROTECTION REQUIREMENTS

10 ÷ 100 kW 100 ÷ 750 kW > 750 kW

Generator Circuit Breaker   

Dedicated Transformer 

Disconnect/Isolate Switch   

Over-voltage protection   

Under-voltage protection   

Over-frequency protection   

Under-frequency protection   

Earth-fault protection  

Over-current Voltage Restraint Protection 

Neutral Voltage Displacement Protection   

Synchronisation   

Loss of Network supply (Islanding see section 7)   

Power factor or Voltage Regulation Equipment  

Page 13 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. The protection associated with a distributed generator shall co-ordinate with the protection associated with the distribution network as follows:

a. In order to reduce to a minimum the impact of faults on the distribution network, the generator must meet target clearance times, that are agreed between Westpower and the generator, for fault power flowing from the distribution network, Westpower will ensure that the relevant protection settings are compatible with the target clearance times that are specified by Westpower;

b. The settings of any protection which controls a circuit breaker, or the operating parameters of any automatic switching device at any Network Connection Point, shall be approved by Westpower;

c. It will be necessary for the distributed generator protection to co-ordinate with any auto re- close settings specified by Westpower, and

d. Any distributed generator connected to the distribution network may be required to withstand, without tripping, the negative phase sequence loading incurred during the clearance of a close- up phase-to-phase fault by distribution network back-up protection and which is within the plant short time rating.

E. Islanding

The part of the distribution network to which a distributed generator is connected, may inadvertently, or during emergency conditions, become detached from the rest of the distribution network, creating an "island". Westpower will decide based on the local distribution network conditions, whether islanding is a credible possibility, and whether it is desirable for the distributed generator to continue to generate while connected to the islanded section of the distribution network. Westpower would generally require that the distributed generator disconnect from the distribution network upon the detection of islanding.

If no facilities exist for the subsequent re-synchronisation with the rest of the distribution network, the distributed generator owner will, under Westpower's control, disconnect the distributed generator prior to reconnection of the island to the rest of the distribution network and the subsequent re-synchronisation of the distributed generator.

Where Westpower determines that islanding is a credible possibility and that the distributed generator is to disconnect upon detection, Westpower will require that the distributed generator always export more reactive power than any credible islanded load can absorb. The distributed generator owner is to install equipment that is capable of detecting the resulting reduction in reactive power export/increase in voltage which would be caused by islanding and disconnect the generator from the distribution network.

Under emergency conditions, some distributed generators may continue to operate outside the statutory frequency limits. Where distributed generators are connected to the distribution network at a voltage level of 11kV or less, it is possible that there could be automatic low frequency load disconnection equipment within the load. Consequently, distributed generator owners should ensure that all protection on their distributed generator has settings to co-ordinate with those on the automatic low frequency load shedding equipment. Westpower will provide information on this equipment on request.

Page 14 of 14 Issue 1.5: 20 December 2017 This document is subject to change prior any notice. Please ensure that you have the latest version. Fees for connection of distributed generation Fees for connection of distributed generation

The following fees are in accordance with Electricity Industry Participation Code 2010 – Part 6 – Connection of distributed generation, and applied to any application to connect a distributed generation to Westpower’s network. The fees are in relation to distributed generation capacity and application type and are charged for each activity prescribed below, individually.

Activity Fee [$] (excl. of GST) Fees for making an application for distributed generation

Distributed generation of 10 kW or less in total (Simplified Approval Process - Part 1A) 100 Distributed generation of 10 kW or less in total (Standard Approval Process - Part 1) 200 Distributed generation of above 10 kW in total but less than 100 kW in total 500 Distributed generation of 100 kW or above in total but less than 1 MW 1,000 Distributed generation of 1 MW and above 5,000

Fees for observation of testing and inspection

Distributed generation of 10 kW or less in total 60 Distributed generation of above 10 kW in total but less than 100 kW in total 120 Distributed generation of 100 kW and above 1,200

Fees for processing information related to remedy of a deficiency

Distributed generation of 10 kW or less in total (Simplified Approval Process - Part 1A) 80

Page 1 of 1 Approved Inverters and Export Congestion Information Approved Inverters for small distributed generation (less than 10 kW)

All ‘Grid Connect PV Inverters’ currently approved by the Clean Energy Council are approved to be connected to the Westpower Network. These inverters comply with AS/NZS 4777.2:2015. The full list can be found here: www.solaraccreditation.com.au/products/inverters/approved-inverters.html

Export Congestion Information for distributed generation (less than 10 kW)

Currently, there are no locations of any known export congestion within Westpower’s network, neither any locations expected to become subject to export congestion within the next 12 months.

Page 1 of 1 Regulated terms for distributed generation

Regulated terms for distributed generation

NOTE: These terms need to be interpreted in conjunction with Electricity Industry Participation Code 2010 (Part 6 - Connection of distributed generation)

General 1. Overview of regulated terms 2. Interpretation 3. General obligations

Meters 4. Installation of meters and access to metering information

Access 5. Right of Distributor to access Generator's premises 6. Process if Distributor wants to access Generator's premises 7. Distributor must not interfere with Generator's equipment 8. Generator must not interfere with, and must protect, Distributor's equipment 9. Obligation to advise if interference with Distributor's equipment or theft of electricity is discovered

Interruptions and disconnections 10. General obligations relating to interruptions 11. Circumstances allowing Distributor to temporarily disconnect distributed generation 12. Obligations if distributed generation temporarily disconnected by Distributor 13. Adverse operating effects 14. Interruptions by Generator 15. Permanent disconnections

Time frame for construction 15A. Distributed generator must construct distributed generation within 18 months of approval

Confidentiality 16. General obligations relating to confidentiality 17. When confidential information can be disclosed 18. Disclosures by employees, agents, etc

Pricing 19. Pricing principles

Liability 20. General obligations relating to liability 21. Exceptions to general obligations relating to liability 22. Limits on liability 23. Liability clauses do not apply to fraud, wilful breach, and breach of confidentiality 24. Force majeure

Page 1 of 8 Regulated terms for distributed generation

General

1. Overview of regulated terms

This document sets out the regulated terms that apply to a distributor and a distributed generator in respect of distributed generation that is connected in accordance with clause 6.6 of Part 6 of the Code (Electricity Industry Participation Code 2010) and Schedule 6.1.

2. Interpretation

These regulated terms must be interpreted--- a. in light of the purpose of Part 6 of the Code; and b. so as to give business efficacy to the relationship between the Distributor and the Generator created by Part 6 of the Code; and c. the Distributor means Westpower Ltd.; and d. the Generator means the person who owns or operates distributed generation; and e. the Code means Electricity Industry Participation Code 2010.

3. General obligations

1) The Distributor and the Generator must perform all obligations under these regulated terms in accordance with connection and operation standards (where applicable). 2) The Distributor and the Generator must each construct, interconnect, operate, test, and maintain their respective equipment in accordance with--- a. these regulated terms; and b. connection and operation standards (where applicable); and c. the Code. 3) The Generator must, subject to subclause (2), construct, interconnect, operate, test, and maintain its distributed generation in accordance with— a. reasonable and prudent operating practice; and b. the applicable manufacturer's instructions and recommendations. 4) The Distributor and Generator must each be fully responsible for the respective facilities they own or operate. 5) The Distributor and Generator must each ensure that their respective facilities adequately protect each other's equipment, personnel, and other persons and their property, from damage and injury. 6) The Generator must comply with any conditions that were specified by the Distributor under clause 18 of Schedule 6.1 as conditions of the connection (or, to the extent that those conditions were the subject of a dispute under clause 20(3) of that schedule, or of negotiation during the period for negotiation of the connection contract, the conditions or other measures as finally resolved or negotiated).

Meters

4. Installation of meters and access to metering information

1) The Generator must provide to the Distributor, at the Distributor's request, the interval data and cumulative data recorded by the metering installations at the point of connection at which the distributed generation is connected or is proposed to be connected. 2) The Generator must provide reactive metering if: a. the meter for the distributed generation is part of a category 2 metering installation, or a higher category of metering installation; and b. the Generator is required to do so by the Distributor. 3) The Distributor's requirements in respect of metering measurement and accuracy must be the same as set out in Part 10 of the Code.

Page 2 of 8 Regulated terms for distributed generation

Access

5. Right of Distributor to access Generator's premises

1) The Generator must provide the Distributor, or a person appointed by the Distributor, with safe and unobstructed access onto the Generator's premises at all reasonable times--- a. for the purpose of installing, testing, inspecting, maintaining, repairing, replacing, operating, reading, or removing any of the Distributor's equipment and for any other purpose related to these regulated terms; and b. for the purpose of verifying metering information; and c. for the purpose of ascertaining the cause of any interference to the quality of delivery services being provided by the Distributor to the Generator; and d. for the purpose of protecting, or preventing danger or damage to, persons or property; and e. for the purposes of reconnecting or disconnecting the distributed generation; and f. for any other purpose relevant to either or both of--- i. the Distributor connecting distributed generation in accordance with connection and operation standards: ii. maintaining the integrity of the distribution network. 2) The rights of access conferred by these regulated terms are in addition to any right of access the Distributor may have under any statute or regulation or contract.

6. Process if Distributor wants to access Generator's premises

1) The Distributor must exercise its right of access under clause 5 by,--- a. wherever practicable, giving to the Generator reasonable notice of its intention and of the purpose for which it will exercise its right of access; and b. causing as little inconvenience as practicable to the Generator in carrying out its work; and c. observing reasonable and prudent operating practice at all times; and d. observing any reasonable security or site safety requirements that are made known to the Distributor by the Generator. 2) However, the Distributor may take all reasonable steps to gain immediate access where it reasonably believes there is immediate danger to persons or property.

7. Distributor must not interfere with Generator's equipment

1) The Distributor must not interfere with the Generator's equipment without the prior written consent of the Generator. 2) However, if emergency action has to be taken to protect the health and safety of persons, or to prevent damage to property, the Distributor--- a. may interfere with the Generator's equipment without prior written consent; and b. must, as soon as practicable, inform the Generator of the occurrence and circumstances involved.

8. Generator must not interfere with, and must protect, Distributor's equipment

1) The Generator must not interfere with the Distributor's equipment without the prior written consent of the Distributor. 2) However, if emergency action has to be taken to protect the health and safety of persons, or to prevent damage to property, the Generator--- a. may interfere with the Distributor's equipment without prior written consent; and b. must, as soon as practicable, inform the Distributor of the occurrence and circumstances involved. 3) The Generator must protect the Distributor's equipment against interference and damage.

9. Obligation to advise if interference with Distributor's equipment or theft of electricity is discovered 1) If the Distributor or the Generator discovers evidence of interference with the Distributor's equipment, or evidence of theft of electricity, the party discovering the interference or evidence must advise the other party within 24 hours.

Page 3 of 8 Regulated terms for distributed generation

2) If interference with the Distributor's equipment at the Generator's installation is suspected, the Distributor may itself carry out an investigation and present the findings to the Generator within a reasonable period. 3) The cost of the investigation--- a. must be borne by the Generator if it is discovered that interference by the Generator, or by its subcontractors, agents, or invitees, has occurred, or if the interference has been by a third party, and the Generator has failed to provide reasonable protection against interference to the Distributor's equipment; and b. must be borne by the Distributor in any other case.

Interruptions and disconnections

10. General obligation relating to interruptions

The Distributor must make reasonable endeavours to ensure that the connection of the distributed generation is not interrupted.

11. Circumstances allowing Distributor to temporarily disconnect distributed generation

Despite clause 10, the Distributor may interrupt the connection service, or curtail either the operation or output of the generation, or both, and may temporarily disconnect the distributed generation in any of the following cases: a. in accordance with the Distributor's congestion management policy: b. if reasonably necessary for planned maintenance, construction, and repairs on the distribution network; c. for the purpose of protecting, or preventing danger or damage to, persons or property: d. if the Generator fails to allow the Distributor access as required by clause 5: e. if the Generator modifies its distributed generation, without prior authorization from the Distributor, in such a way that it has a material effect on the Generator's injection of electricity into the network: f. in accordance with clause 13 (adverse operating effects); g. if the Generator fails to comply with the Distributor’s: i. connection and operation standards; ii. safety requirements.

12. Obligations if distributed generation temporarily disconnected by Distributor

1) The Distributor must make reasonable endeavours to--- a. advise the Generator before any interruption under clause 11; and b. co-ordinate with the Generator to minimise the impact of the interruption. 2) The Distributor and the Generator must co-operate to restore the distribution network and the distributed generation to a normal operating state as soon as is reasonably practicable following temporary disconnection. 3) In the case of a forced outage, the Distributor must, subject to the need to restore the distribution network, make reasonable endeavours to: a. restore service to the Generator; and b. advise the Generator of the expected duration of the outage.

13. Adverse operating effects

1) The Distributor must advise the Generator as soon as is reasonably practicable if it reasonably considers that operation of the distributed generation may--- a. adversely affect the service provided to other distribution network customers; or b. cause damage to the distribution network or other facilities; or c. present a hazard to any person. 2) If, after receiving that advise, the Generator fails to remedy the adverse operating effect within a reasonable time, the Distributor may disconnect the generation upon reasonable notice (or without notice when reasonably necessary in the event of an emergency or hazardous situation).

Page 4 of 8 Regulated terms for distributed generation

14. Interruptions by Generator

1) This clause applies to any connected distributed generation above 10 kW in total. 2) The Generator must notify the Distributor of any planned outages and must make reasonable endeavours to advise the Distributor of any event that affects network operations. 3) The Generator must make reasonable endeavours to notify the Distributor of the interruption and to co-ordinate with the Distributor to minimise the impact of the interruption.

15. Permanent disconnections

1) Despite clause 10, the Distributor may permanently disconnect distributed generation in the following circumstances: a. on receipt of a request from the Generator: b. without notice, if the Generator has been temporarily disconnected under clause 11 and the Generator has failed to comply with either the connection and operating standards or safety requirements of the Distributor and there is an ongoing risk to persons or property. c. without notice, on receipt of the registry inactive status with reason "De-energised---ready for decommissioning" where the trader has de-energised a site, attempted to recover the meters, and updated the registry to that status: d. on at least 10 business days' notice of intention to disconnect, if--- i. the Generator has not injected electricity into the network at any time in the preceding 12 months; and ii. the Distributor has not been notified by the Generator of reasons for the non- injection; and iii. the Distributor has reasonable grounds for believing that the Generator has ceased to operate the distributed generation. 2) If the point of connection is to be disestablished in its entirety, a permanent disconnection must be performed by means of isolation of generation by removal of all electrical connections to Distributor's lines. The Distributor must notify the Generator within 2 business days of the work having been completed.

Time frame for construction

15A Distributed generator must construct distributed generation within 18 months of approval

1) This clause applies if the Distributor approves the Generator's application to connect distributed generation under Part 1, Part 1A, or Part 2 of Schedule 6.1. 2) The regulated terms cease to apply if the distributed generator does not construct the distributed generation within: a. 18 months from the date on which approval was granted; or b. such later date as is agreed by the Distributor and Generator. 3) The Generator must reapply under Schedule 6.1 if: a. the regulated terms no longer apply in accordance with subclause (1); and b. the Generator wishes to connect distributed generation to the Distributor's distribution network.

Confidentiality

16. General obligations relating to confidentiality

1) Each party must preserve the confidentiality of confidential information, and must not directly or indirectly reveal, report, publish, transfer, or disclose the existence of any confidential information, except as permitted in subclause (2). 2) Each party must only use confidential information for the purposes expressly permitted by these regulated terms.

Page 5 of 8 Regulated terms for distributed generation

17. When confidential information can be disclosed

Either party may disclose confidential information in any of the following circumstances: a. if the Generator and Distributor agree in writing to the disclosure of information: b. if disclosure is expressly provided for under these regulated terms: c. if, at the time of receipt by the party, the confidential information is in the public domain or if, after the time of receipt by either party, the confidential information enters the public domain (except where it does so as a result of a breach by either party of its obligations under this clause or a breach by any other person of that person's obligation of confidence): d. if either party is required to disclose confidential information by: i. a statutory or regulatory obligation, body, or authority; or ii. a judicial or arbitration process; or iii. the regulations of a stock exchange upon which the share capital of either party is from time to time listed or dealt in; or iv. the Code: e. if the confidential information is released to the officers, employees, directors, agents, or advisors of the party, provided that: i. the information is disseminated only on a need-to-know basis; and ii. recipients of the confidential information have been made fully aware of the party's obligations of confidence in relation to the information; and iii. any copies of the information clearly identify it as confidential information: f. if the confidential information is released to a bona fide potential purchaser of the business or any part of the business of a party, subject to that bona fide potential purchaser having signed a confidentiality agreement enforceable by the other party in a form approved by that other party, and that approval may not be unreasonably withheld.

18. Disclosures by employees, agents, etc

To avoid doubt, a party is responsible for any unauthorised disclosure of confidential information made by that party's officers, employees, directors, agents, or advisors.

Pricing

19. Pricing Principles

Connection charges that are payable by the Generator must be determined in accordance with the pricing principles set out in Schedule 6.4.

Liability

20. General obligations relating to liability

1) If the Distributor or Generator breaches any of the regulated terms (whether by act or omission), that party is liable to the other. 2) The Generator's and the Distributor's liability to each other is limited to damages for any direct loss caused by that breach. 3) This clause does not limit the liability of either party to pay all charges and other amounts due under Part 6 of the Code or the regulated terms.

21. Exceptions to general rule about liability

1) Neither the Distributor nor the Generator, nor any of its officers, employees, directors, agents, or advisors, are in any circumstances liable to the other party for:

Page 6 of 8 Regulated terms for distributed generation

a. any indirect loss, consequential loss (including, but not limited to, incidental or special damages), loss of profit, loss of revenue (except any liability under clause 20(3), loss of use, loss of opportunity, loss of contract, or loss of goodwill; or b. any loss resulting from the liability of the other party to another person; or c. any loss or damage incurred by the other party if, and to the extent that, this results from any breach of the regulated terms or any negligent action. 2) The Distributor is not liable, except to the extent caused or contributed to by the Distributor in circumstances where the Distributor was not acting in accordance with Part 6 of the Code (including these regulated terms), for: a. any momentary fluctuations in the voltage or frequency of electricity conveyed to or from the distributed generation's point of connection or nonconformity with harmonic voltage and current levels; or b. any failure to convey electricity to the extent that: i. the failure arises from any act or omission of the Generator or other person, excluding the Distributor and its officers, employees, directors, agents, or advisors; or ii. the failure arises from: a. a failure to convey or a reduction of injection or supply of electricity into the distribution network; or b. an interruption in the conveyance of electricity in the distribution network, if the interruption was at the request of the system operator or under a nationally or regionally co-ordinated response to an electricity shortage; or iii. the failure arises from any defect or abnormal conditions in or about the Generator's premises; or iv. the Distributor was taking any action in accordance with Part 6 of the Code or regulated terms; or v. the Distributor was prevented from making necessary repairs (for example, by police at an accident scene). 3) The Generator is not liable for: a. any failure to perform an obligation under these regulated terms caused by the Distributor's failure to comply with the obligation; or b. any failure to perform an obligation under these regulated terms arising from any defect or abnormal conditions in the distribution network.

22. Limits on liability

1) The maximum total liability of each party, as a result of a breach of these regulated terms, must not in any circumstances exceed, in respect of a single event or series of events arising from the same event or circumstance, the lesser of: a. the direct damage suffered or the maximum total liability that the party bringing the claim against the other party has at the time that the event (or, in the case of a series of related events, the first of such events) giving rise to the liability occurred; or b. $1,000 per kW of nameplate capacity up to a maximum of $5 million.

23. Liability clauses do not apply to fraud, wilful breach, and breach of confidentiality

The exceptions in clause 22, and the limits on liability in clause 23, do not apply: a. if the Distributor or the Generator, or any of its officers, employees, directors, agents, or advisors, has acted fraudulently or wilfully in breach of these regulated terms; or b. to a breach of confidentiality under clause 16 by either party.

24. Force majeure

1) A failure by either party to comply with or observe any provisions of these regulated terms (other than payment of any amount due) does not give rise to any cause of action or liability based on default of the provision if: a. the failure is caused by: i. an event or circumstance occasioned by, or in consequence of, any act of God, being an event or circumstance: a. due to natural causes, directly or indirectly and exclusively without human intervention; and

Page 7 of 8 Regulated terms for distributed generation

b. that could not reasonably have been foreseen or, if foreseen, could not reasonably have been resisted; or ii. a strike, lockout, other industrial disturbance, act of public enemy, war, blockade, insurrection, riot, epidemic, aircraft, or civil disturbance; or iii. the binding order or requirement of any court, government, local authority, the Rulings Panel, or the Authority, and the failure is not within the reasonable control of the affected party; or iv. the partial or entire failure of supply or availability of electricity to the distribution network; or v. any other event or circumstance beyond the control of the party invoking this clause; and b. the party could not have prevented such failure by the exercise of the degree of skill, diligence, prudence, and foresight that would reasonably and ordinarily be expected from a skilled and experienced Distributor or Generator engaged in the same type of undertaking under the same or similar circumstances in New Zealand at the time. 2) If a party becomes aware of a prospect of a forthcoming force majeure event, it must notify the other party as soon as is reasonably practicable of the particulars of which it is aware. 3) If a party invokes this clause, it must as soon as is reasonably practicable notify the other party that it is invoking this clause and of the full particulars of the force majeure event relied on. 4) The party invoking this clause must: a. use all reasonable endeavours to overcome or avoid the force majeure event; and b. use all reasonable endeavours to mitigate the effects or the consequences of the force majeure event; and c. consult with the other party on the performance of the obligations referred to in paragraphs (a) and (b). 5) Nothing in subclause (4) requires a party to settle a strike, lockout, or other industrial disturbance by acceding, against its judgement, to the demands of opposing parties.

Page 8 of 8 Status – Approved Standard – 392S127 Version 1.0 – March 2015

DISTRIBUTION CODE

RECORD OF AMENDMENTS Affected Issue Change By Date Section/ Clause 0.1 New document first issue M McSherry 26/4/2011

1.0 Approved R Griffiths 12/03/2015

TABLE OF CONTENTS

1 INTRODUCTION ...... 5 1.1 BACKGROUND ...... 5 1.2 SCOPE ...... 5 2 NETWORK CONNECTION CODE ...... 6 2.1 INTRODUCTION ...... 6 2.2 NETWORK CONNECTION BACKGROUND INFORMATION ...... 6 2.2.1 Connection Arrangements ...... 6 2.2.2 Information Required by Westpower ...... 7 2.2.3 Network Connection Points ...... 8 2.2.4 Standard Supply Capacities and Supply Details ...... 9 2.2.5 Temporary Supplies ...... 10 2.2.6 Specification of Equipment, Lines and Cables ...... 10 2.3 NETWORK CONNECTION DESIGN CONSIDERATIONS ...... 10 2.3.1 Security ...... 10 2.3.2 Frequency and Voltage ...... 11 2.3.3 System Disturbances and Waveform Distortion ...... 11 2.3.4 Short Circuit Ratings ...... 11 2.3.5 Earthing ...... 12 2.3.6 Voltage Regulation and Control ...... 12 2.3.7 Protection ...... 12 2.3.8 Substations on Customers Premises ...... 13 2.3.9 Equipment at Ownership Boundary ...... 13 2.4 CUSTOMER INSTALLATION TECHNICAL REQUIREMENTS ...... 14 2.4.1 Ripple Control ...... 14 2.4.2 Superimposed Signals ...... 14 2.4.3 Power Factor ...... 14 2.4.4 Mains ...... 15 2.4.5 Water Heaters ...... 15 2.4.6 Motor Starting ...... 15 2.4.7 Welders ...... 16 3 NETWORK OPERATING CODE ...... 16 3.1 INTRODUCTION ...... 16 3.2 PLANNING INFORMATION ...... 17 3.2.1 Information supplied by Westpower ...... 17 3.2.2 Requirements for Electricity Retailers and Other Users ...... 17 3.3 OPERATIONAL LIAISON ...... 17 3.3.1 Planned Outages and Events ...... 17 3.3.2 Significant Incidents ...... 18 3.4 SAFETY CO-ORDINATION ...... 18 3.4.1 Objective ...... 18 3.4.2 Procedure ...... 18

3.5 SYSTEM LOAD CONTROL ...... 19 3.5.1 Procedures ...... 19 3.5.2 Normal Load Management ...... 20 4 CONTINGENCY PLANNING ...... 21 4.1 INTRODUCTION ...... 21 4.2 SYSTEM RECOVERY PROCEDURES ...... 21 4.3 CIVIL EMERGENCIES ...... 21 5 SYSTEM TESTS ...... 22 5.1 INTRODUCTION ...... 22 5.2 COSTS OF TESTS...... 22 5.3 PROCEDURES ...... 22 5.3.1 Quality of Supply ...... 22 5.3.2 Network Connection Point Parameters ...... 22 6 REQUIREMENTS FOR EMBEDDED GENERATION ...... 23 6.1 INTRODUCTION ...... 23 6.2 GENERATION CONNECTION ARRANGEMENTS ...... 23 6.3 GENERAL REQUIREMENTS ...... 24 6.4 INFORMATION TO BE PROVIDED ...... 24 6.5 INFORMATION REQUIRED ...... 24 6.5.1 Information Required from all Embedded Generators ...... 25 6.5.2 Additional Information Required from Large Embedded Generators ...... 26 6.5.3 Additional Information for Transpower Requirements ...... 26 7 DEFINITIONS ...... 26 8 WESTPOWER STANDARD - DOCUMENT CHANGE REQUEST ...... 32

1 INTRODUCTION

1.1 BACKGROUND

As part of the terms and conditions for connection, and in the interests of other Users connected to the Distribution Network, this document specifies the technical requirements which must be complied with by Users connecting and operating their equipment on premises connected to Westpower’s Distribution Network. This document, the Distribution Code, sets out these terms and conditions. It covers three broad areas:

technical requirements for connection requirements for operational contact requirements for long-term planning

It is also a statement of assurance to the Users of the network how they can expect the network to be operated and managed. In addition to complying with the Distribution Code, Users of the Distribution Network will be required to comply with the Electricity (Safety) Regulations 2010 and any amendments thereof, and Codes of Practices promulgated under these Regulations. This document is primarily a technical document and is to be read in conjunction with:

 Westpower’s Electricity Pricing Schedule  Westpower’s Connection Agreements as appropriate  Westpower’s Use of System Agreement with electricity retailers

1.2 SCOPE

The Distribution Code comprises a Network Connection Code, a Network Operating Code, Contingency Planning, System Tests and Embedded Generation.

Copies of the Distribution Code can be obtained from the Reception Desk at 146 Tainui Street, Greymouth, the website www.westpower.co.nz or writing to the Asset Manager, PO Box 388, Greymouth.

2 NETWORK CONNECTION CODE

2.1 INTRODUCTION

The Network Connection Code defines the conditions and standards applicable to all User Systems connected or proposed to be connected to the Westpower Distribution Network.

2.2 NETWORK CONNECTION BACKGROUND INFORMATION

2.2.1 Connection Arrangements

The design of connections between the Distribution Network and the User's System shall be in accordance with this code and Westpower’s Network Standards, and may include such modification as approved in writing by Westpower.

When an application for connection is made on a Request for Supply form, www.westpower.co.nz/pdfs/form_request_for_supply.pdf Westpower will determine available capacity from the Distribution Network, and will notify the User of the voltage to which the User will be connected in accordance with its normal practice for the type of load to be supplied. Westpower may on occasion specify a different connection voltage in order to avoid potential disturbance caused by the User's Apparatus to other users of the Distribution Network, or for other technical reasons, or may agree alternative methods for minimising the effects of disturbing loads.

If sufficient capacity is not available or network extensions are required it will be necessary for the User to enter into a Network Extension Agreement in accordance with Westpower’s Investment Policy.

It will be necessary for Westpower to be reasonably satisfied in writing that the User's System will comply with all appropriate requirements of the Distribution Code before issuing a Network Connection Agreement to the User.

Westpower’s approval of the connection of a Customer's Installation is conditional on:

a) the agent or contractor nominated to carry out the Connection Services having been previously accredited by Westpower.

(At present ElectroNet Services Ltd are the only contractors accredited to liven network connections)

b) the installation complying with Westpower’s connection requirements

c) the installation having a valid Certificate of Compliance

d) full compliance with this Distribution Code

e) the User completing a System Connection Form with an electricity Retailer approved to use Westpower’s Distribution Network

Westpower is required to give at least 15 business days written notice to the Territorial Authority and other affected utility operators where an electrical reticulation is to be constructed along, over or under any legal road. Furthermore, resource consents are required for certain works in the Buller District Council area and these can take several weeks to obtain.

2.2.2 Information Required by Westpower

The following information should be provided to Westpower when a connection is requested on the Request for Supply form. Should a preliminary examination of this data indicate that more detailed information is required, this shall be provided to Westpower upon request. For supplies at Low Voltage it is normally possible to assess whether a proposed connection is acceptable, and to determine the necessary supply arrangements, from analysis of the following limited data:

a) the maximum current requirements (A) and number of phases (refer 2.2.4). Note: this is not the fuse size which will be determined by Westpower.

b) the type and electrical loading of equipment to be connected, for example, the number and size of motors, including maximum starting currents and electrical heating arrangements

c) the date when the connection is required

d) the proposed Network Connection address

For supplies other than at Low Voltage the following additional information may be required at Westpower’s discretion.

a) All types of Demand:

(i) the maximum Active Power requirement

(ii) the maximum and minimum Reactive Power requirements

(iii) the type of load and control arrangements, eg controlled rectifier or larger motor drives with maximum starting currents

(iv) the maximum load on each phase at the time of maximum Demand

(v) the maximum harmonic currents to be imposed on the Distribution Network

b) Fluctuating Loads:

Details of the cyclic variation, and where applicable the duty cycle, of Active Power (and Reactive Power, if appropriate), in particular.

(i) the rates of change of Active Power and Reactive Power, both increasing and decreasing

(ii) the shortest repetitive time interval between fluctuations in Active Power and Reactive Power

(iii) the magnitude of the largest step changes in Active Power and Reactive Power, both increasing and decreasing

In some cases, more detailed information such as an indication of the pattern of build up of load and a proposed commissioning programme may be required.

c) Capacitors and Inductors:

Details will be required of capacitor banks and reactors connected at High Voltage which could affect the Distribution Network. Sufficient detail is required for the following:

(i) to verify that controlling equipment of the Distribution Network is suitably rated

(ii) to show that the performance of the Distribution Network will not be impaired.

2.2.3 Network Connection Points

The Network Connection Point (NCP) is the point of connection of the Customer’s installation with Westpower’s Distribution Network. At the NCP, there is a fuse in each phase conductor, the rating of which determines the maximum capacity available to the Customer Installation from the network.

The location of the Network Connection Point will be determined by Westpower and will be where practicable be as close as possible to the boundary of the Customers’ premises and in general not on private land. However in cases where two or more Customer Installations share the same premises, or where High Voltage network lines cross on to private land, the Network Connection Point for the Customer’s installation may be on private property.

Where a customer’s service line or a network extension crosses through or over any neighbouring property on separate title, it is the customer’s responsibility to obtain an easement for that section of works. This requirement also applies to distribution lines where the easement must be provided by the customers in the name of Westpower Limited. An agreement to grant such easements is required before supply is connected.

For all new installations, Network Connection Point fuses will only be mounted within Westpower’s service pillar boxes or on network poles.

Network connection fuses may not be removed, replaced, repaired or in any other way interfered with other than by Westpower’s accredited personnel.

Note: the NCP is not necessarily located at the Point of Supply as defined in the Act.

2.2.4 Standard Supply Capacities and Supply Details

Standard supply capacities are as follows:

Category 1 - Domestic

Single Phase up to 15 kVA

Category 1 - Non Domestic

Single or Three Phase up to 15 kVA

Street Lighting

Category 2

Three Phase 15 kVA to 200 kVA

Category 2 - Time of Use Metering

Three Phase 100 kVA to 200 kVA

Category 3

Three Phase over 200 kVA

Where the supply is two or three phases, the load must be balanced as equally as possible across the phases. Any cost associated with the correction of phase balancing is to the Customer’s account.

Where a Network Connection Point is not available at the boundary of the premises, Westpower reserves the right to determine the availability of capacity for all new or capacity upgrade requests.

2.2.5 Temporary Supplies

Where metered builders supply boxes are connected to Westpower’s network they must meet the requirements of the Electricity (Safety) Regulations 2010. Responsibility for the operation and safety of the temporary supply is with the User.

Connections to the Distribution Network and livening services will be provided by Westpower free of charge. Any upgrade in capacity for the final installation will be treated as a new connection by Westpower, providing no new Request for Supply is required and the final installation is in line with the original request.

2.2.6 Specification of Equipment, Lines and Cables

Westpower reserves the right to determine the suitability of standards proposed for equipment connected to the Distribution Network. Design and construction must comply with the current Westpower Network Standards which are separately documented and publicly available.

2.3 NETWORK CONNECTION DESIGN CONSIDERATIONS

2.3.1 Security

The connection between the Distribution Network and any User System shall be designed to be consistent with the Westpower’s Asset Management Plan and Risk Management Plan, any relevant statutory Laws, Regulations and Electrical Codes of Practice and with this Distribution Code. Where any User System does not comply,

Westpower may disconnect the non complying User System from the Distribution Network.

2.3.2 Frequency and Voltage

Any User Systems connected to the Distribution Network shall be designed to enable the Normal Operating Frequency and voltages to be supplied to Users and to comply with statutory Regulations and Electrical Codes of Practice.

Nominal supply is 50 Hertz at 230 volts ± 6% (216.2 volts – 243.8 volts).

2.3.3 System Disturbances and Waveform Distortion

Distortion of the System Voltage Waveform caused by certain types of equipment may result in annoyance to other Users of the Distribution Network or damage to connected Apparatus. In order to limit these effects the following shall apply to User’s loads connected to the Distribution Network:

a) voltage fluctuations shall comply with the limits set out in statutory Regulations, the Electrical Codes of Practice and related NZ standards

b) the harmonic content of any load shall comply with the limits of the New Zealand Electrical Code of Practice for Harmonic Levels (ECP36:1993) and any subsequent amendments

c) motor starting shall comply with the Committee Report on Motor Starting Current for AC Motors published by the Electricity Engineers Association of NZ

Under special circumstances Westpower may consider other limits or levels.

Under fault and circuit switching conditions the rated frequency or voltage may fall or rise transiently.

2.3.4 Short Circuit Ratings

The short circuit rating of User's equipment at the Network Connection Point should not be less than the design fault level of the Distribution Network.

The Distribution Network’s 11kV system is designed for a maximum short circuit level of 250MVA (13kA). Customer Installations which take supply at 11kV shall be designed for a 250MVA prospective short circuit level, unless Westpower at their discretion specify otherwise.

Information on the maximum prospective short circuit current at any proposed point of supply is available on request to Westpower.

2.3.5 Earthing

The arrangements for connecting the System with earth shall be designed to comply with the requirements of the Regulations, Electrical Codes of Practice and NZ Standards as may be applicable.

Design practice for multiple earth Systems shall comply with Good Industry Practice. The specification of associated equipment shall meet the voltages and fault levels which will be imposed on the equipment as a result of the method of earthing.

Users shall take precautions to limit the occurrence and effects of circulating currents in respect of the neutral points connected with earth where there is more than one source of energy. Refer to Westpower’s Distribution Earthing Code.

2.3.6 Voltage Regulation and Control

Any extension or connection to the Distribution Network shall be designed in such a way that it does not adversely affect the voltage control employed by Westpower.

2.3.7 Protection

The Distribution Network and the User System connected to the Distribution Network shall incorporate protective devices in accordance with any relevant Regulations, Electrical Codes of Practice and NZ Standards.

In order to ensure satisfactory operation of the Distribution Network, Westpower reserves the right to determine the Protection Systems, operating times, discrimination and sensitivity at the Ownership Boundary.

The User's arrangements for protection, including types of equipment and Protection settings, must be compatible with Westpower’s Network Standards. In particular:

a) the maximum clearance times must be within the limits established by Westpower in accordance with Protection rating and equipment short circuit rating

b) the User should be aware that auto-reclosing or sequential switching features may be in use on the Distribution Network. Westpower will, on request, provide details of auto-reclosing or sequential switching features in order that the User may take this into account in the design of the User's System, including Protection arrangements

c) the User should be aware that the Protection arrangements on the Distribution Network may cause disconnection of one phase only of a three phase supply for certain types of faults

2.3.8 Substations on Customers Premises

In some cases the supply required by a prospective Customer or an increase in supply required by an existing Customer may not, in the opinion of Westpower’s Asset Manager, reasonably be available from the local works. In these cases the Customer shall provide and maintain at their cost (if any) an acceptable building for a substation, lines, cables or other equipment on the Customers premises.

In these cases, Easements in Gross to Westpower’s minimum requirements covering the ‘electrical works’ will be required. These may also be required on adjacent properties (whether owned by the Customer or others) depending on the access route to the property requiring new or upgraded supply. It is the Customer’s responsibility to gain the easements required.

A fenced pad-type substation may be installed where access to the substation area is not open to the public. Where access is open to the public, a padmount transformer or fully enclosed substation will be required.

Unimpeded vehicle access to the substation for the repair or removal of the transformer and other Westpower property must be maintained at all times.

Where 11kV cables and mains cables are to be covered by concrete structures (other than concrete to protect the cables) they must be installed in ducts unless acceptable alternative access is available.

2.3.9 Equipment at Ownership Boundary

All equipment at the Ownership Boundary shall meet the design principles contained in this Code. Connection to the Distribution Network shall incorporate a means of disconnection of the User's installation by Westpower.

2.4 CUSTOMER INSTALLATION TECHNICAL REQUIREMENTS

2.4.1 Ripple Control

Westpower operates a 425 Hz ripple control System on its Distribution Network. All electrical installations must at all time present high impedance to this frequency.

Where Users install capacitors on their installations, these capacitors must be designed to avoid affecting any signals which Westpower uses for its System management purpose. Westpower reserves the right to require the User to provide any necessary corrective measures if the Users capacitors interfere with Westpower's signals. Advice for installation of capacitors is available from Westpower.

2.4.2 Superimposed Signals

Use of the Distribution Network is restricted to the conveyance of electricity. Use of the Distribution Network for mains borne signaling or communication purposes including power line carrier of any frequency requires the separate agreement of Westpower.

2.4.3 Power Factor

The Power Factor of any installation greater than 15kVA capacity shall not be less than 0.95 lagging. All new connections or increased capacity installations must comply with this requirement before the Network Connection Application will be approved.

The Power Factor of Customer Installations may be corrected by using correction of individual appliances or by bulk correction at the Customer’s switchboard.

Approved ripple signal blocking equipment must be fitted to bulk correction installations, with blocking chokes installed on all phases. Blocking chokes will also be required at other installations where in the opinion of Westpower, the installation causes an unacceptable lowering of ripple injection signal voltage or absorption of ripple signal current. In all instances, ripple blocking will be installed at the User’s cost.

Westpower reserves the right to charge existing connected Users a network penalty in addition to the normal electricity charges after 6 months notice has been given by Westpower to correct the Power Factor of the installation.

2.4.4 Mains

The recommended residential service main is copper neutral screen with a minimum cross sectional area of 16mm2 or aluminium equivalent. All service mains shall be appropriate for the load group required and shall comply with NZS3000:1997.

Mains cables shall be installed in accordance with the applicable regulatory, industry and local authority standards.

It is preferred the service main cables do not share the same trench as Westpower’s distribution cables.

2.4.5 Water Heaters

All water heating installations must comply with the requirements of NZS 4602 and 4603:1986 or equivalent, and must be installed to the requirements of the relevant building codes.

The following recommended minimum standards apply to water heater cylinders connected to Westpower’s Controlled Tariffs:

Water Saver Cylinder Capacity Element Rating Single Bedroom Residence 135 Litres 1000W Multi Bedroom Residence 180 Litres 2000W Night Only Minimum Cylinder Size 270 Litres 3000W

2.4.6 Motor Starting

Except where alternative arrangements are agreed in writing between Westpower and the User, all motor starting is to comply with the Electrical Engineers Association Report on Motor Starting Currents for AC Motors.

Reduced current starters are required for all motors greater than those in the Table below unless otherwise authorised by the Asset Manager.

Size Limitations of Motors that may be started Direct on Line

Rural Urban Urban Residential Non Residential Single 0.75kW (1hp) 1.5kW (2hp) 2.2kW (3hp) Phase

Three 4.0kW (5.3hp) 4.0kW (5.3hp) 7.5kW (10hp) Phase

Rural, Urban and Residential zonings are as zoned in the Local Authority District Plan.

All other motors shall have the Relative Voltage Change at the point of common coupling and at the 11kV supply substation not exceeding the amounts in the table below.

Schedule of Relative Voltage Change Frequency of Starting PCC At 11kV Bus In excess of 10 Starts per hour 1.0% 0.5% In excess of 3 starts per day 3.0% 1.0% Not more than 3 starts per day including not more than 1 start 6.0% 1.5% Between 5pm & 11pm on any day Emergency equipment 12.0% 2.0% Started infrequently

2.4.7 Welders

Welders rated at 5kVA or under are classed as portable appliances and may be operated at 230V. Welders rated over 5kVA shall be supplied from two phases, shall comply with BS 638 and shall be corrected to 0.8 pf.

Operation of welders shall comply with the Australian Standards on Disturbances in Supply Networks AS 2279.

3 NETWORK OPERATING CODE

3.1 INTRODUCTION

The Network Operating Code deals with various operational matters affecting Users, including the provision of forecasts of likely Demand, the planning of System Outages and generating plant Outages, the reporting of operational changes and Events, safety matters, and procedures for dealing with contingencies.

Information exchanged for planning purposes is confidential to the parties holding the information. In many cases this will comprise sensitive commercial information and must be treated accordingly.

3.2 PLANNING INFORMATION

The Distribution Code details the planning information to be exchanged between Westpower and Users, or, where appropriate, between Westpower and a Retailer on behalf of Users.

3.2.1 Information supplied by Westpower

Westpower will provide all System parameters reasonably required for planning by the User. All reasonable costs incurred in obtaining this information shall be to the account of the User.

3.2.2 Requirements for Electricity Retailers and Other Users

Users of the Distribution Network must provide sufficient planning data and information and safety management requirements as requested by Westpower from time to time, to enable Westpower to comply with technical and legislative requirements.

A User must give adequate notice of any significant changes to its System or operating regime to enable Westpower to prepare its development plan, budget for, and implement any necessary System modifications.

3.3 OPERATIONAL LIAISON

Westpower has requirements for the exchange of information in relation to operations on the Distribution Network, or the System of any User connected to the Distribution Network. It does not seek to deal with any actions arising from the exchange of information, but merely with that exchange.

3.3.1 Planned Outages and Events

Requirement to Notify

In the case of a Planned Outage or Event on the System of a User which has an operational effect on the Distribution Network, the User will notify Westpower in accordance with this Code.

Timing of Notification

Notification of a Planned Outage or Event shall be given as soon as possible after the occurrence of the Planned Outage or Event, or the time that an Event is known of or anticipated by the notifying party. A notification of a Planned Outage will be given as far in advance as possible, and in any case shall be given in sufficient time to reasonably allow the recipient to consider and assess the implications and risks arising.

3.3.2 Significant Incidents

Reporting Procedure

Where an Event on the System of a User has had a significant effect on the Distribution Network, the Event shall be reported in writing to Westpower. Such an Event will be termed a significant incident.

For the purposes of this section of the Distribution Code, the term "Event" is deemed to include those emergency operations which a User may initiate in response to particular abnormal circumstances which may arise on the System.

3.4 SAFETY CO-ORDINATION

Westpower specifies the safety management system criteria to be applied to meet statutory requirements such as the “Safety Manual - Electricity Industry July 2004, Parts 1 and 2” and the “Safety Manual - Electricity Industry January 2009, Part 3” (as amended or its successor code), other legislative requirements and other relevant Codes, imposed on owners and operators of the Distribution Network.

Similar criteria and standards of safety management systems are required to be provided by other Users of the Distribution Network when carrying out work or tests at the operational interface with the Distribution Network.

3.4.1 Objective

The objective is to establish requirements with a view to ensuring safety of persons working on the Distribution Network and at or across operational and Ownership Boundaries.

3.4.2 Procedure

An approved Health & Safety Handbook specifying the principles and procedures, and where appropriate, the documentation to be applied, so as to ensure the health

and safety of all who are liable to be working or testing on the Distribution Network, or on Apparatus connected to it, will be established by Westpower and Users.

3.5 SYSTEM LOAD CONTROL

Westpower is concerned with the provisions for Demand control under emergency conditions to be made by Westpower or the User with Systems connected to the Distribution Network. Procedures are established to enable Westpower either in its own right or following a request from Transpower, to achieve a reduction in Demand in order to avoid a breakdown or overload of any part of the Total System or the Distribution Network. The following methods of reducing Demand are dealt with:

a) voltage reduction;

b) User Demand management;

c) User disconnection;

d) automatic low frequency disconnection;

e) emergency manual User disconnection.

3.5.1 Procedures

This Distribution Code applies to Westpower and Users, including Embedded Generators. Implementation of Demand control by Westpower may affect Customers of Retailers, and where applicable, contractual arrangements between Retailers and their Customers should reflect this. Demand control may take the forms outlined below.

Operational System Load Reduction

Westpower will arrange procedures to reduce load within the Distribution Network in a controlled manner by reducing voltage and/or disconnecting Customers or portions of Customer loads.

Automatic Disconnection of Demand through Low-Frequency Detectors

Westpower shall not be responsible for any low frequency disconnection operations initiated by Transpower, even if such arrangements were made in consultation with Westpower.

Emergency Manual Disconnection of Demand

Where required by regulation or if requested by Transpower, or for its own purposes, Westpower may arrange to have available an emergency manual disconnection procedure. The procedure will be designed to be called upon to operate irrespective of System frequency. Contractual arrangements between Retailers and their Customers should reflect the possibility of emergency disconnection of load.

3.5.2 Normal Load Management

The safe and secure operation of the Distribution Network is dependent on the current Load Control regime. In the short to medium term, this regime is necessary to maintain the level of charges specified by Westpower in agreement with Retailers.

The charges specified in agreements with Retailers are effectively discounted from the uncontrolled levels and any significant reduction of the Load Control service is likely to result in a reduction of this effective discount.

Current Control Regime

Westpower offers a Load Control Service for the following appliances in Domestic premises.

storage-type water heaters

permanently wired storage space heaters

electric kilns

spa and swimming pools

storage heaters

The above appliances may be disconnected as controlled supplies at any time of the year, but this will normally be during the months of May, June, July, August and September. This period is chosen both to minimise the charges payable to Transpower and to match the design capacity of the Network. Accordingly this period may vary from time to time.

If the above appliances are not controlled then the Customer’s Installation will be assessed at a higher effective control period Demand than would otherwise be the case and this is reflected in Westpower’s tariffs.

Additionally the Load Control Service may be operated to meet the requirements of the Electricity Retailers for tariff switching and in the event of a material reduction of available electricity, the Load Control Service may be operated for the Retailers.

4 CONTINGENCY PLANNING

4.1 INTRODUCTION

This section of the Distribution Code covers requirements for assisting the re-start or operating of the Total System in abnormal situations which require co-ordination between Transpower, Westpower and Users, with a common approach to give uniformity of priorities. It also specifies requirements to be met during periods of declared Civil Emergencies.

4.2 SYSTEM RECOVERY PROCEDURES

The Total System may experience complete or partial shutdown in situations where a major fault has a cascading effect through this System, or where there has been a significant loss of generation. In such situations, System recovery must be co- ordinated in such a way that ensures it is carried out in a minimum of time. Westpower is required to follow the procedures laid down in the relevant Transpower connection codes and to liaise with Transpower when taking any action which may have an impact on the Transpower transmission System.

Where generation has been lost completely:

the start-up of Embedded Generators subject to Central Dispatch and which have been identified as having Black Start Capability shall be the responsibility of Transpower.

the start-up of Embedded Generators not subject to Central Dispatch and which have Black Start Capability shall be co-ordinated by Westpower, with due notification being given to Transpower.

Where there is sufficient generating capacity available by configuring Westpower's Distribution Network appropriately, Westpower shall establish stable "islands of supply" around particular Generators.

The strategy to be applied in the above circumstances shall be documented by Westpower.

4.3 CIVIL EMERGENCIES

Westpower has an obligation to carry out certain Civil Emergency duties related to its Distribution Network. Under such emergencies the actions of Westpower and all parties connected either directly or indirectly to the Distribution Network will be governed by the procedures laid down in the relevant portions of the Civil Defence Act 1983.

5 SYSTEM TESTS

5.1 INTRODUCTION

This section specifies Westpower's requirement to test and/or monitor its Distribution Network to ensure that Users are not operating outside the technical parameters required by any part of this Distribution Code.

5.2 COSTS OF TESTS

At the discretion of Westpower, a charge may be levied on Users for the carrying out of System Tests requested by the Customer and on such terms as may be agreed with the Customer.

5.3 PROCEDURES

The testing and monitoring relates to two aspects of the Distribution Network, namely Quality of Supply and Network Connection Point parameters. System test procedures shall be carried out in accordance with Westpower's standard procedures unless agreed otherwise by Westpower.

5.3.1 Quality of Supply

Westpower from time-to-time will test and/or monitor the Quality of Supply at various points on its Distribution Network. Specific testing and/or monitoring may be initiated by request of the User

Where the results of such tests show that the User is operating outside the technical parameters specified in any part of the Distribution Code, or of any other statutory regulation or Electrical Code of Practice, the User will be informed accordingly.

Where the User requests, a re-test can be carried out and witnessed by a User representative.

A User shown to be operating outside limits specified in this document will immediately, or within such time as may be agreed with Westpower, remedy the situation or disconnect from its System any Apparatus causing the problem. Continued failure to remedy the situation may result in the User being disconnected from the Distribution Network until they can warrant this Code will be complied with.

5.3.2 Network Connection Point Parameters

Westpower will from time-to-time monitor the effect of the User on the Distribution Network. The monitoring will normally be related to the amount of Power and Reactive Power transferred across the Network Connection Point. Where the User is exporting to or importing from the Distribution Network Active Power and Reactive Power in excess of the parameters in the Use of Systems Agreement, Westpower will inform the User of, and where appropriate demonstrate the results of such monitoring.

Where the User requires increased Active Power and Reactive Power in excess of the physical capacity of the Network Connection Point, the User will restrict power transfers to the limits specified in the Use of Systems Agreement until a modified Use of Systems Agreement has been applied for from Westpower and physically established.

6 REQUIREMENTS FOR EMBEDDED GENERATION

6.1 INTRODUCTION

This section is applicable to all existing or prospective Generators, including Users with Own Generation having plant operating in parallel with the Distribution Network. It is recognised that some existing Generators may not comply at present with all the requirements of this section, and in such cases Westpower will advise the Generator which requirements these are. The Generators shall take reasonable steps to comply with these requirements within a time frame acceptable to Westpower.

Generators must be aware their installations are governed by the Electricity Governance (Connection of Distributed Generation) Regulations 2007 when connecting to Distribution Networks

The Guidelines and Application Forms are contained in Westpower’s Distributed Generation Information Pack that can be obtained from the Reception Desk at 146 Tainui Street, Greymouth, the website www.westpower.co.nz or writing to the General Manager, Assets and Engineering Services, PO Box 388, Greymouth.

All prospective Generators must complete the Network Connection Application Form and Westpower will determine in its sole discretion whether or not connection is acceptable.

6.2 GENERATION CONNECTION ARRANGEMENTS

The design of connections between the Distribution Network and a Generator shall be subject to the approval of Westpower who at its sole discretion will determine the standards deemed acceptable.

When an Application for Connection and Operation is made, and Westpower in its sole discretion determines transfer capacity, Westpower will agree with the Generator the voltage to which the Generator will be connected. Westpower may on occasion specify a different connection voltage for technical reasons, or may have additional requirements as a consequence of the voltage at connection.

Before entering into a Network Connection Contract it will be necessary for Westpower to be reasonably satisfied in writing that the Generator will comply with all appropriate requirements of the Distribution Code.

6.3 GENERAL REQUIREMENTS

Embedded Generators connected at Low Voltage with a station output not in excess of 10 kW shall, as a minimum requirement, comply with the requirements of such statutory Regulations and Electrical Codes of Practice as may be applicable. Their presence shall not restrict switching on the System.

Embedded Generators connected at High Voltage or of a larger capacity shall, in addition to the minimum requirements, comply with the general principles of the Transpower Connection Codes and the particular requirements of Westpower.

6.4 INFORMATION TO BE PROVIDED

Embedded Generators will fall within three basic classes for which minimum information as outlined below shall be provided to Westpower by the Generator. The classes are:

a) Generators with embedded generating plant connected at Low Voltage with a station capacity less than 10 kW having a 30 business day approval process

b) Generators with embedded generating plant connected at High Voltage with a station capacity greater than 10 kW and up to 5 MW having a 60 business day approval process

c) Generators with embedded generating plant with a station capacity in excess of 5 MW having an approval process of 80 business days

Westpower will, subject to the User agreeing to meet the reasonable costs, use the information provided to model the Distribution Network and to decide what method of connection will need to be employed and the voltage level at which the connection should be made.

6.5 INFORMATION REQUIRED

6.5.1 Information Required from all Embedded Generators

It will be necessary for each Generator to provide information to Westpower on the generating plant and the proposed interface arrangements between the generating plant and the Distribution Network. The following information shall be required by Westpower before entering into an agreement to connect generating plant onto the Distribution Network:

a) Generating Plant Data

(i) terminal volts (kV)

(ii) rated kVA

(iii) rated kW

(iv) maximum Active Power sent out (kW max) Reactive Power requirements (kVAr), if any

(v) type of generating plant - synchronous, asynchronous, etc

(vi) type of prime mover

(vii) anticipated operating regime of generation, eg continuous, intermittent, peak lopping

(viii) fault level contribution (for large machines, this may be covered by the details listed in 5.4.2)

(ix) method of voltage control

(x) Generator transformer details, as applicable

(xi) requirements for Top-Up supplies and/or standby supplies

b) Interface Arrangements

(i) the means of synchronisation between the Distribution Network and the User's System

(ii) details of arrangements for connecting with earth that part of the Generator's System directly connected to the Distribution Network

(iii) the means of connection and disconnection which are to be employed

(iv) precautions to be taken to ensure the continuance of safe conditions should any earthed neutral point of the Generator's System operated at HV become disconnected from earth

6.5.2 Additional Information Required from Large Embedded Generators

Additional information required from Embedded Generators connected at high voltage and of capacity greater than 10 kW is contained in the Distributed Generation Information Pack.

6.5.3 Additional Information for Transpower Requirements

Generators are required to supply such information as requested by Transpower. It will be the responsibility of the Generator to provide the information required to Westpower. Westpower will pass on the information to Transpower.

7 DEFINITIONS

In this Distribution Code, the following terms shall have the following meanings unless the context otherwise requires:

Act The Electricity Act 1992 and amendments thereto.

Active Power The product of voltage and in-phase component of alternating current (measured in kilo-watts (kW) or megawatts (MW)).

Apparatus All electrical machines, fittings, and appliances.

Apparent Power The product of voltage and alternating current (measured in kilo-volt- amperes (kVA) or mega-volt-amperes (MVA)).

Authorisation The formal sanction, preferably given in writing, to undertake specified tasks that have a specific meaning in safety management systems.

Back-up Protection The protection system which will open a fault-current interrupting device in the absence of the correct operation of the primary protection system.

Black Start The procedure necessary for a generator to recover from a total or local system shutdown.

Black Start Capabilities The ability of a power station to commence generating without the need for a power supply external to the power station.

Central Dispatch The dispatch of generating units by Transpower.

Certificate of Compliance A certificate issued in accordance with Regulation 39, Electricity (Safety) Regulations 2010.

Civil Emergency A state of national, regional or local civil defence emergency as declared by the appropriate civil defence controller.

Connection Agreement The agreement between the Customer and the Distributor for the provision of Line Function Services.

Control Centre A location for the control and operation of all or part of the Distribution Network, the Transpower transmission system, or the system of a User.

Control Person A person who has been nominated by Westpower, Transpower or a User to be responsible for controlling and coordinating system operations, including all health and safety requirements in hazard identification and emergencies that will apply to people in the place of work and people in the vicinity of the place of work.

Conveyancing Agreement Means an agreement between the Retailer and the Distributor for the provision of Conveyancing Services.

Customer Means a purchaser of Line Function Services either directly from Westpower or indirectly through a Retailer.

Customer Installation Means any Fittings owned or used by a Customer (except Distributor's Equipment) that form all or part of a system for conveying electricity from the Customer's Network Connection Point to where the electricity may be consumed.

Demand The electricity demand expressed in kVA/MVA, kW/MW or kVAr/MVAr of apparent power, active power and reactive power respectively.

Distribution Network Means the Distributor's system including all Fittings comprising that system to convey electricity from the Network’s Point or Points of Supply and which terminates at the Customer's Network Connection Point.

Distributor A person or organisation who supplies Line Function Services.

Electrical Code of Practice An Electrical Code of Practice issued pursuant to the Electricity (Safety) Regulations 2010.

Embedded Generator A person or organisation who generates electricity and whose generating units are directly connected to a Distribution Network.

Embedded Network Operator Means an entity that operates a public or private network for supply to itself or other parties.

Event An unscheduled or unplanned (although it may be anticipated) occurrence on or relating to a system, including, without limiting that general description, faults, incidents and breakdowns and adverse weather conditions being experienced.

Generator Any other person or Organisation that generates and supplies electricity.

Good Industry Practice Means the exercise of that degree of skill, diligence, prudence and foresight which would reasonably and ordinarily be expected from a skilled and experienced operator engaged in the same type of undertaking under the same or similar circumstances and includes adherence to the principles laid out in any code of practice generally adopted by the electrical industry.

High Voltage Any line voltage exceeding 1000 volts ac or 1500 volts dc.

kVA Kilo-volt-ampere (1000 volt-amperes)

kW Kilo-watt (1000 watts).

Line Function Services The provision, operation and maintenance of electric lines, substations, related equipment and all other services necessary for the conveyance of electricity from Generators to Customers' Network Connection Points including the procuring of contracts with Transpower for the connection of the Distributor’s Network, the provision of a Load Control Service and the allocation of Losses.

Load Control Service The function of reducing or interrupting a part or all of a Customer's supply of electricity on the basis agreed between the Retailer and Distributor at the date of this agreement or such other basis as may be agreed between the Distributor and the Retailer with the principal purpose of optimising TPNZ charges and minimising existing and future network capacity requirements.

Low Voltage Any line voltage exceeding 32 volts ac or 115 volts dc, but not exceeding 1000 volts ac or 1500 volts dc.

MVA Mega-volt-ampere (1,000,000 volt-ampere)

MVAr Mega-var (1,000,000 vars).

MW Mega-watt (1,000,000 watts).

Network Connection Agreement The agreement issued by Westpower confirming its approval for the User to connect to the Distribution Network.

Network Connection Point The point of connection at which a supply of electricity may flow between the Distribution Network and the Customer's Installation as defined by the Distributor.

Network Point of Supply The point or points of connection between the Distribution Network and Transpower’s network or any Generator or any other distribution network through which the Distribution Network receives a supply of electricity.

Network Standards The Westpower Network Extension Design Standards, Network Extension Construction Standards, Network Extension Arrangement Drawings and Network Extension Component Drawings.

New Capacity Agreement The agreement between the Distributor and the Retailer or the Customer (as appropriate) to supply new capacity or upgraded capacity or other requirements of the Distribution Network to meet the needs of the Retailer or the Customer.

Normal Operating Frequency The number of alternating current cycles per second, expressed in hertz, at which the system normally operates, ie 50 Hertz.

Operational Boundary The boundary between the equipment operated by Westpower or a User and the equipment operated by another, as specified in the relevant site responsibility schedules.

Operational Diagram A schematic representation of the HV apparatus and the connection to all external circuits at a connection point, incorporating its numbering, nomenclature and labeling.

Outage Removal of equipment from service, generally to permit maintenance or other work to be undertaken.

Ownership Boundary The boundary between the equipment owned by Westpower and the equipment owned by the User.

Planned Outage A pre-planned outage of generating plant, or of part of the Transpower transmission system, or of part of a Distribution Network.

Point of Connection The point of interconnection of a User and includes all Network Connection Points.

Power Factor The ratio of active power to apparent power.

Power Station An installation comprising one or more generating units, even where sited separately, which are owned and/or controlled by the same Generator and may reasonably be considered as being managed as one power station.

Protection The provisions for detecting abnormal conditions in a system and initiating fault clearance, or actuating signals or indications.

Quality of Supply A satisfactory supply of electricity pursuant to this Code and the Electricity (Safety) Regulations 2010.

Reactive Power The product of voltage and current and the sine of the phase angle between them, which is normally measured in Kilo-vars (kVAr) or Mega-vars (MVAr).

Regulations Regulations made pursuant to the Electricity Act 1992.

Request for Supply The application form required by Westpower to connect to the Distribution Network.

Retailer Means an Electricity Supply Business which uses the Distribution Network for the purpose of conveying electricity it is selling to Customers whether with or without Line Function Services it is selling.

Superimposed Those electrical signals carried on a Distribution Network for the purpose Signals of information transfer or load management.

System A Distribution Network running at various voltages.

System Connection Form The form obtained from the electricity Retailer to be completed by the User to obtain a supply of electricity.

System Control The administrative and other arrangements established to maintain as far as possible the proper safety and security of a system.

System Tests Those tests which involve simulating conditions or the controlled application of irregular, unusual or extreme conditions on the total system or any part of it, but not including routine testing, commissioning or recommissioning tests.

Top-Up The supply of electricity to a User on a continuing or regular basis to make good any shortfall between the User’s total supply requirements and that met from other sources.

Total System The Transpower transmission system and the Distribution Networks and any other transmission or Distribution Networks throughout New Zealand.

TPNZ Transpower New Zealand Ltd, its successors and permitted assigns.

TPNZ Network The electricity transmission network owned and operated by TPNZ.

Use of System Agreement An agreement between the Retailer and the Distributor for the provision of Line Function Services.

User Any person or organisation using the Distribution Network, but excluding Transpower. It includes all customers with Connection Agreements, embedded generators, Retailers, and Embedded Network Operators.

User System Any system owned by a User including Customer Installations, generating units, Distribution Networks, equipment connecting generating units or Distribution Networks.

User With Own Generation A User with one or more generating units connected to the customer's system providing all or part of the customer's electricity requirements and which may use the Distribution Network for the transport of any surplus of electricity being exported.

8 WESTPOWER STANDARD - DOCUMENT CHANGE REQUEST

Memo To: General Manager, Assets & Engineering Services, Westpower Asset Management Group, P O Box 375, Greymouth.

Change Details: (Attach separate sheets as necessary).

Paragraphs Affected:

Priority: Urgent Routine Low (Within 1 week) (Within 12 months) (Next Review)

Submitted By (Print Name) Date

Document Change Request - Acknowledgement

Dear ……………………………

Thank you for your suggestion regarding changes to the above mentioned document.

Your request has been noted and added to our works program. Should we require any additional information regarding your notification then we will be in contact with you. Thank you for your contribution to improving the quality of Westpower’s documentation. Regards,

………………………………. ……………………………….. General Manager, Assets & Engineering Services Date