26 27 14 (16216) - Main Distribution Centre Metering

Section Cover Page Section 26 27 14 Main Distribution Centre 2010-11-01 Metering

Use this Section to specify requirements for metering installed in main distribution centres specified in the following sections:

Section 26 18 36 - Fused Main Distribution Centre. Section 26 18 37 - Moulded Case Main Distribution Centre. Section 26 18 38 - Industrial Air Circuit Breaker Main Distribution Centres.

This Master Specification Section contains:

1. This Cover Sheet

2. Specification Section Text:

1. General 1.1 Related Requirements 1.2 Delivery, Storage and Handling

2. Products 2.1 Analog Metering 2.2 Digital AC Metering System 2.3 Current and Potential Transformers

3. Execution 3.1 Installation

BMS Basic Master Specification Alberta Infrastructure Page 0 Master Specification System Section 26 27 14 Main Distribution Centre Plan No: Metering Project ID: Page 1

1. General

1.1 RELATED REQUIREMENTS

.1 Submittal Procedures: Section 01 33 00. .2 LEED Requirements: Section 01 35 18. .3 Waste Management and Disposal: Section 01 74 19. .4 Electrical General Requirements: Section 26 00 10. .5 Electrical Operation and Maintenance Data: Section 26 01 10. .6 Testing, Adjusting, and Balancing of Electrical Equipment and Systems: Section 26 08 10. .7 Fused Main Distribution Centre: Section 26 18 36. .8 Moulded Case Main Distribution Centre: Section 26 18 37. .9 Industrial Air Circuit Breaker Main Distribution Centres Section 26 18 38.

1.2 DELIVERY, STORAGE AND HANDLING

.1 Separate waste materials for [reuse] [and] [recycling] in accordance with Section 01 74 19 - Waste Management and Disposal.

2. Products

2.1 ANALOG METERING

.1 Voltmeter:

.1 Type: [AC] [ ] 150 volt full scale deflection. .2 Size: [115] [ ] mm [square] 250° scale arc. .3 Accuracy: [One] [ ] per cent. .4 Calibration: [0 - 750] [ ] volts, zero left. .5 Mounting: [Flush] [Surface]. .6 Selector Switch: [4] [7] [ ] position.

.2 Ammeters:

.1 Type: [AC] [ ] 5 Ampere full scale deflection. .2 Size: [115] [ ] mm [square] 250° scale arc. .3 Accuracy: [One] [ ] per cent. .4 Calibration: [0 - 300] [ ] Amperes. .5 Mounting: [Flush] [Surface]. .6 Selector Switch: [4] [ ] position.

2010-11-01 BMS Version Section 26 27 14 Main Distribution Centre Plan No: Metering Project ID: Page 2

.3 Triplex Ammeters:

.1 Type: [AC] [ ] 5 Ampere full scale deflection with: .1 Triplex thermal demand. .2 Instantaneous readout for each phase. .2 Size: [115] [ ] mm square, 250° scale arc for each unit. .3 Accuracy: [±1] <3 per cent. .4 Calibration: [0 - 600] [ ] Amperes. .5 Mounting: [Flush] [Surface].

2.2 DIGITAL AC METERING SYSTEM

.1 Provide a microprocessor based digital AC metering system capable of providing following electrical measurements:

.1 Volts on each phase. .2 Current on each phase. .3 Frequency. .4 Power factor. .5 Kilo-Volt-Amperes. .6 Kilowatts. .7 Total MWH. .8 Programmable KW set point[s] with dry contact relay output[s]. .9 KW hour storage for [24] [ ] hours. .10 Historic minimum and maximum data for all measured parameters. .11 RS232-C output.

.2 Technical Features:

.1 Display: 20 character alphanumeric [10] [ ] mm high.

.2 Readout: two fields:

.1 Field 1: Volts and amperes for phases A, B, and C or average selectable by front panel button.

.2 Field 2: Any one of KVA, KW, PF frequency or MWH, or automatic sequence of all selectable by front panel button.

.3 Display update rate: every [3] [ ] seconds.

.4 Control: 4 buttons to provide the following operating modes:

.1 Auto sequence. .2 Non-sequence. .3 Display maximum. .4 Display minimum. .5 Reset field parameters.

.5 Output:

.1 RS232-C serial output for [video terminal] [printer] [modem] connection. .2 Baud rate: 300 to 9600 field programmable.

.6 Accuracy:

.1 One per cent for:

.1 Voltage .2 Amperes.

.2 One Hertz for frequency.

.3 Three per cent for:

.1 KVA. .2 KW. .3 MWH.

.7 Alarm Contacts:

.1 Set Point: adjustable for when measured load exceeds setting. .2 Output: form C dry contacts, 120 volt, 5 Ampere.

.8 Range of Operation:

.1 Voltage: 120, 208, 480, 600 volts, field programmable.

SPEC NOTE: Potential transformers required when voltage exceeds 208 volts.

.2 Ampacity: 10 to 9,999 amperes field programmable.

SPEC NOTE: Current transformers required with 5 ampere output.

.3 Frequency: 50 to 70 Hertz. .4 Power Factory: 0.50 leading to 0.50 lagging. .5 Kilo-Volt-Amperes: 0 to 30,000. .6 Kilowatts: 0 to 30,000. .7 MWH: 0 to 3,000 repeated.

.9 Mounting: Panel mounted.

.10 Power supply: 100 - 130 volts AC 60 Hz.

2.3 CURRENT AND POTENTIAL TRANSFORMERS

.1 Current Transformers:

.1 Type: metering accuracy class. .2 Ratios: [600:5] [ ] Amperes. .3 Provide shorting bars for current transformer secondary.

SPEC NOTE: Choose instrument transformers and meters to yield 60% meter deflection at full projected demand load.

.2 Potential Transformers:

.1 Type: metering accuracy class. .2 Ratios: [600:120] [360:120] [ ] volts. .3 Mounting: Drawout compartment with HRC fuse on primary side.

SPEC NOTE: Provide test block for main distribution centre metering.

.3 Current Transformer and Potential Transformer Test Blocks: [10] [ ] pole, complete with [7] [ ] current transformer and [3] [ ] potential transformer poles.

.4 Test Plugs: [10] [ ] pin to match current transformer and potential transformer test blocks specified above.

3. Execution

3.1 INSTALLATION

.1 Install meters in meter section of Main Distribution Centre.

.2 Co-ordinate installation of current transformers and potential transformers with installation of instrument transformers for utility metering and protective relaying.

END OF SECTION

2010-11-01 BMS Version