26 27 14 (16216) - Main Distribution Centre Metering

Section Cover Page
Section 262714
Main Distribution Centre
2010-11-01Metering

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

Section261836Fused Main Distribution Centre.

Section261837Moulded Case Main Distribution Centre.

Section261838Industrial Air Circuit Breaker Main Distribution Centres.

This Master Specification Section contains:

1.This Cover Sheet

2.Specification Section Text:

1.General

1.1Related Requirements

1.2Delivery, Storage and Handling

2.Products

2.1Analog Metering

2.2Digital AC Metering System

2.3Current and Potential Transformers

3.Execution

3.1Installation

BMS Basic Master Specification
Alberta Infrastructure
Master Specification System / Page 0
Section 262714
Main Distribution Centre
Plan No:Metering
Project ID:Page 1

1.General

1.1Related requirements

.1Submittal Procedures:Section013300.

.2LEED Requirements:Section013518.

.3Waste Management and Disposal:Section017419.

.4Electrical General Requirements:Section260010.

.5Electrical Operation and Maintenance Data:Section260110.

.6Testing, Adjusting, and Balancing

of Electrical Equipment and Systems:Section260810.

.7Fused Main Distribution Centre:Section261836.

.8Moulded Case Main Distribution Centre:Section261837.

.9Industrial Air Circuit Breaker Main Distribution CentresSection261838.

1.2DELIVERY, STORAGE AND HANDLING

.1Separate waste materials for [reuse] [and] [recycling] in accordance with Section 017419 Waste Management and Disposal.

2.Products

2.1ANALOG METERING

.1Voltmeter:

.1Type: [AC] [] 150 volt full scale deflection.

.2Size: [115] [] mm [square] 250° scale arc.

.3Accuracy: [One] [] per cent.

.4Calibration: [0 - 750] [] volts, zero left.

.5Mounting: [Flush] [Surface].

.6Selector Switch: [4] [7] [] position.

.2Ammeters:

.1Type: [AC] [] 5 Ampere full scale deflection.

.2Size: [115] [] mm [square] 250° scale arc.

.3Accuracy: [One] [] per cent.

.4Calibration: [0 - 300] [] Amperes.

.5Mounting: [Flush] [Surface].

.6Selector Switch: [4] [] position.

.3Triplex Ammeters:

.1Type:[AC] [] 5 Ampere full scale deflection with:

.1Triplex thermal demand.

.2Instantaneous readout for each phase.

.2Size:[115] [] mm square, 250° scale arc for each unit.

.3Accuracy:[±1] <3per cent.

.4Calibration:[0 - 600] [] Amperes.

.5Mounting:[Flush] [Surface].

2.2DIGITAL AC METERING SYSTEM

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

.1Volts on each phase.

.2Current on each phase.

.3Frequency.

.4Power factor.

.5Kilo-Volt-Amperes.

.6Kilowatts.

.7Total MWH.

.8Programmable KW set point[s] with dry contact relay output[s].

.9KW hour storage for [24] [] hours.

.10Historic minimum and maximum data for all measured parameters.

.11RS232-C output.

.2Technical Features:

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

.2Readout:two fields:

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

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

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

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

.1Auto sequence.

.2Non-sequence.

.3Display maximum.

.4Display minimum.

.5Reset field parameters.

.5Output:

.1RS232-C serial output for [video terminal] [printer] [modem] connection.

.2Baud rate:300 to 9600 field programmable.

.6Accuracy:

.1One per cent for:

.1Voltage

.2Amperes.

.2One Hertz for frequency.

.3Three per cent for:

.1KVA.

.2KW.

.3MWH.

.7Alarm Contacts:

.1Set Point:adjustable for when measured load exceeds setting.

.2Output:form C dry contacts, 120volt, 5Ampere.

.8Range of Operation:

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

SPECNOTE:Potential transformers required when voltage exceeds 208 volts.

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

SPECNOTE:Current transformers required with 5 ampere output.

.3Frequency:50 to 70 Hertz.

.4Power Factory:0.50 leading to 0.50 lagging.

.5Kilo-Volt-Amperes:0 to 30,000.

.6Kilowatts:0 to 30,000.

.7MWH:0 to 3,000 repeated.

.9Mounting:Panel mounted.

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

2.3CURRENT AND POTENTIAL TRANSFORMERS

.1Current Transformers:

.1Type:metering accuracy class.

.2Ratios:[600:5] [] Amperes.

.3Provide shorting bars for current transformer secondary.

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

.2Potential Transformers:

.1Type:metering accuracy class.

.2Ratios:[600:120] [360:120] [] volts.

.3Mounting:Drawout compartment with HRC fuse on primary side.

SPECNOTE:Provide test block for main distribution centre metering.

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

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

3.Execution

3.1INSTALLATION

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

.2Co-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