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Asset Management Plan 2012-22 Front Cover: Unison - Lighting the Rotorua Night Market Unison Networks Limited | Asset Management Plan 2012-22

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Asset Management Plan 2012-22 Front Cover: Unison - Lighting the Rotorua Night Market Unison Networks Limited | Asset Management Plan 2012-22 Asset Management Plan 2012-22 Front Cover: Unison - lighting the Rotorua Night Market Unison Networks Limited | Asset Management Plan 2012-22 TABLE OF CONTENTS SECTION 1 SUMMARY OF THE PLAN SECTION 2 BACKGROUND & OBJECTIVES SECTION 3 ASSETS COVERED SECTION 4 SERVICE LEVELS SECTION 5 NETWORK DEVELOPMENT PLANS SECTION 6 LIFE CYCLE ASSET MANAGEMENT PLANNING SECTION 7 RISK MANAGEMENT SECTION 8 EVALUATION OF PERFORMANCE SECTION 9 EXPENDITURE FORECASTS AND RECONCILIATION APPENDIX A GLOSSARY OF TERMS APPENDIX B REQUIREMENT 7(2) This Asset Management Plan (AMP) is available for public disclosure and applies for the period 1 April 2012 to 31 March 2022. The AMP is reviewed each year and a revised AMP is expected to be available for public disclosure by 1 April 2013. © UNISON NETWORKS LIMITED 2012 OF THE PLAN 1 SUMMARY SECTION 1 SUMMARY OF THE PLAN Communications enabled 11kV ENTEC switches form a vital part of Unison’s automated sectionalisation and restoration programme. SECTION 1 SUMMARY OF THE PLAN 1-1 UNISON NETWORKS LIMITED | ASSET MANAGEMENT PLAN 2012-22 1 Summary .................................................................................................................... 1-2 1.1 Company Profile ............................................................................................................................................ 1-2 1.1.1 Overview .................................................................................................................................................. 1-2 1.1.2 Corporate Goals ....................................................................................................................................... 1-2 1.1.3 Ownership and Governance ..................................................................................................................... 1-2 1.1.4 Electricity Distribution Network ................................................................................................................. 1-2 1.1.5 Unison Fibre Limited ................................................................................................................................ 1-3 1.1.6 Contracting Services ................................................................................................................................ 1-4 1.1.7 ETEL Limited ............................................................................................................................................ 1-4 1.1.8 Facilities Management ............................................................................................................................. 1-4 1.2 Asset Management Plan Structure .............................................................................................................. 1-4 1.2.1 Background and Objectives ..................................................................................................................... 1-4 1.2.2 Assets Covered ........................................................................................................................................ 1-5 1.2.3 Service Levels .......................................................................................................................................... 1-5 1.2.4 Network Development Planning ............................................................................................................... 1-5 1.2.5 Lifecycle Asset Management Planning..................................................................................................... 1-6 1.2.6 Risk Management .................................................................................................................................... 1-6 1.2.7 Evaluation of Performance ....................................................................................................................... 1-7 1.2.8 Expenditure Forecasts and Reconciliation ............................................................................................... 1-7 1.2.9 Appendix A: Glossary of Terms ................................................................................................................ 1-7 1.2.10 Appendix B: Assumptions in Asset Management Planning ...................................................................... 1-7 1.3 Key Stakeholder Information ....................................................................................................................... 1-8 1.3.1 Customer Service Levels ......................................................................................................................... 1-8 1.3.2 Major Projects to Improve Customer Service ......................................................................................... 1-10 1.3.3 Overhead to Underground Conversion Projects ..................................................................................... 1-12 1.3.4 Stakeholder Feedback ........................................................................................................................... 1-13 1.4 Financial Summary of Asset Expenditure and Reconciliation ................................................................ 1-14 Table 1-1: Unison network according to key industry metrics ................................................................................. 1-3 Table 1-2: Summary of Unison's consumer oriented service targets ...................................................................... 1-9 Table 1-3: Summary of Unison’s asset and business oriented performance targets .............................................. 1-9 Table 1-4: Major projects to improve customer service ......................................................................................... 1-12 Table 1-5: HBPCT OHUG programme 2012/13 .................................................................................................... 1-12 1-2 SECTION 1 SUMMARY OF THE PLAN UNISON NETWORKS LIMITED | ASSET MANAGEMENT PLAN 2012-22 1 Summary 1.1 Company Profile 1.1.1 Overview Unison Networks Limited (‘Unison') and its subsidiaries (together ‘the Group’) provide electricity distribution and line function services to consumers and businesses, as well as fibre optic network interconnections and related services throughout the Hawke’s Bay, Rotorua and Taupo regions. The Group also provides electrical, fibre, civil and vegetation contracting services and manufactures electrical products for the Australia, Pacific and New Zealand markets. 1.1.2 Corporate Goals Unison’s key corporate goals are published in its Statement of Corporate Intent and are provided below. Vision “To be the service provider of choice for energy infrastructure solutions” Mission “To be a successful business through excellence in customer service, innovation, and leadership” These goals are critically relevant to the approach Unison takes to the lifecycle management of its asset base. 1.1.3 Ownership and Governance The Unison Group is wholly owned by the Hawke’s Bay Power Consumers’ Trust (HBPCT) on behalf of Hawke’s Bay electricity consumers. The Unison Group’s Board of Directors are appointed by the HBPCT. 1.1.4 Electricity Distribution Network Electricity distribution businesses (EDB) are an integral part of New Zealand’s electricity market, forming the physical link between the transmission network and electricity consumers. Unison owns, manages and operates the distribution network that serves Hawke’s Bay, Rotorua and Taupo consumers. Electricity supply provided at 33kV from Transpower’s grid exit points (GXP) and is connected to zone substations by Unison’s sub-transmission network. At zone substations, the voltage is converted to 11kV for distribution. Over 9,000 distribution substations throughout the network then reduce the voltage to 400V for end use. This Asset Management Plan (AMP) is concerned with the management of the assets that are involved in delivering this service. The Unison network is comprised of over $420m worth of assets, is almost 10,000km in length, and supplies around 110,000 connection points, making Unison the fifth largest EDB in New Zealand. Within Unison’s network footprint are a variety of terrain types and consumer densities, meaning it is necessary to employ a range of reticulation methods and asset management techniques to strike the optimal balance between quality of supply and efficient deployment of assets. The quality of supply experienced by Unison’s consumers has improved consistently over the past five years. SECTION 1 SUMMARY OF THE PLAN 1-3 UNISON NETWORKS LIMITED | ASSET MANAGEMENT PLAN 2012-22 The following table provides further information on the Unison network according to key industry metrics. Metric Description Value 2010/11 Five Year Financial Year Trend Consumers Total installation control points (ICP) connected to the network. 108,978 connected System length Total length of all energised circuits. 9,610km Sub-transmission Total length of all energised 33kV circuits. 446km system length Distribution system Total length of all energised 11kV circuits. 4,451km length Low voltage system Total length of all energised LV circuits. 4,584km length Percentage The proportion of total system length that is undergrounded. 39% - underground Asset value Unison’s Regulatory Asset Base. $477m Faults per 100km Average number of unplanned interruptions per 100km of high 7.6 voltage circuits per annum. SAIDI System Average Interruption Duration Index. A measure of the 128.0 minutes number of minutes per year the average consumer is without (147.9)
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