GE 300, 225 manual See .7.1-1, Phase, 3 wire plus Ground, Phase, 4 wire plus Ground

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GE

3.7.3Battery over current protection and wire sizing

•Please read the safety precautions at the front of this guide carefully, and thoroughly review the Battery manufacturers installation and maintenance manual before connecting the batteries to the UPS.

•If the UPS system has been purchased with an accompanying Battery Cabinet, that cabinet should have an integral Battery Circuit Breaker.

If the UPS has been purchased without a Battery Cabinet or remote rack mounted batteries are to be used then DC over current protection must be provided by others.

•Choose an appropriate DC fuse or circuit breaker using the current data in the chart below.

•Minimum Battery Cable requirement is based on the current data below.

The AC values below are current ratings per phase.

These maximum and nominal ratings should be considered when choosing the

appropriate AC over current protection device.

NEC (National Electric Code) Section 210-20 a rules must be applied.

DC current rating is the maximum battery discharge current which the UPS allows.

(See Fig. 3.7.1-1 and 3.7.1.2)

 

AC Input

AC Input

AC Input

DC Input

 

Rectifier

Bypass

 

 

 

 

 

 

 

F1

F2

 

F3

F4

 

Nom.

 

Max.

Nom.

 

Max.

 

 

 

 

 

SG Series 225 kVA

301 A

 

360 A

271 A

301 A

 

360 A

401 A

SG Series 300 kVA

401 A

 

480 A

361 A

401 A

 

480 A

535 A

Size of Branch Circuit Over current Protection - All Models: - "CAUTION - To reduce the risk of fire, only connect UPS to a circuit provided with (See below) maximum amperes branch circuit over current protection in accordance

with the NEC (National Electric Code), NSI / NFPA 70

 

AC Input

 

AC Input

 

AC Input

 

 

DC Input

 

Rectifier

 

Bypass

 

 

 

 

 

 

 

 

 

 

 

 

 

F1

 

F2

 

 

 

 

F3

 

 

F4

SG Series 225 kVA

450 A

 

350 A

 

 

 

450 A

 

 

600 A

SG Series 300 kVA

600 A

 

500 A

 

 

 

600 A

 

 

700 A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WIRING

 

 

 

 

 

 

 

 

 

 

 

 

Wire sizing according to

 

 

 

 

 

 

 

 

 

NEC Section 210-20 (a)

Table 310-16

 

 

Use 75°C (167°C) copper wire

 

 

 

 

 

 

 

Wiring requirements:

 

 

 

 

 

 

 

 

 

AC INPUT RECTIFIER:

3-Phase, 3 wire plus Ground

 

 

AC INPUT BYPASS:

3-Phase, 4 wire plus Ground

 

 

AC OUTPUT:

3-Phase, 4 wire plus Ground

 

 

DC INPUT:

 

 

 

2 wire (positive and negative) plus Ground

 

 

 

 

 

 

Maximum cable diameter that compression lugs can accept.

 

Refer to torque specifications table for torque requirements.

 

 

Rectifier Input

Bypass Input

 

DC Input

 

 

AC Output

 

GND

SG Series 225 kVA

2 x 500 kcmil

2 x 500 kcmil

 

2 x 750 kcmil

 

2 x 500 kcmil

 

350 kcmil

SG Series 300 kVA

2 x 750 kcmil

2 x 500 kcmil

 

2 x 750 kcmil

 

2 x 500 kcmil

 

350 kcmil

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Installation Guide SG Series 225 & 300 kVA

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Contents SG Series Systems Copyright 2003 by GE Industrial SystemsStart UP and Commissioning Dear CustomerPreface Table of contents Storage InstallationBattery GeneralSafety instructions when working with battery Protective Grounding Terminal Safety symbols and warningsSafety warnings Risk of electric shock PE Earth GND GroundLayout SG Series 225 and 300 KVA LayoutTransport UPS only in upright position Dimensions and weightWeight SG Series 225 and 300 kVA Transport Forklift CraneDelivery Storage of BatteryStorage of the UPS Positioning of the UPS SG Series Place of InstallationCheck -26A of the NEC code for specific requirements Fixing of the UPS cabinet on the floor Openings for input and output cable connections1-5 RPA system disposition Battery locationCFM Ventilation and CoolingUnpacking Take care not to damage the UPS when moving by forkliftPacking material recycling Separate input Rectifier & Bypass recommended Electrical WiringCommon input Rectifier & Bypass Neutral current could be greater than the phase currents Input/output over current protection and wire sizingSee .7.1-1 Phase, 3 wire plus GroundPhase, 4 wire plus Ground Wire positive and negative plus GroundCopper Wire Size Range Wiring Connection1-1 Access to the input / output connections Common Input Rectifier / Bypass Power connection with common input utilityOutput Load Cable section for this connection shall be not less then AWG L3-1 Rectifier Phase C L3-2 Power connection separate input utilityL1-1 Rectifier Phase a L1-2 L2-1 Rectifier Phase B L2-2BR1 Do not insert the Battery Fuses before the commissioning Battery connectionBattery Positive pole of the BatteryManual Bypass, serious damage to the Load could result Setup for SG Series when functioning as frequency converter1 RPA Parallel System Power Wiring of Parallel UnitsParallel Control BUS Connection UPSIntermediate units Terminal unitsInterface IM0048 going to P13 Access to the control bus connectionControl BUS Cable Location Control bus cables connection11-3 Control Bus cable routing and connection Control bus cables routingCustomer Interface Customer InterfaceOr J2 / 1, 2 NO, C, NC Utility Failure 15, 16 Or J2 17, 18 NO, C, NC General Alarm18, 19 Or J2 20, 21 NO, C, NC Acoustic Alarm Output potential free contactsGND JP3 EPO Emergency Power Off Input contact38/38
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