GE 225, 300 manual Cable section for this connection shall be not less then AWG

Page 24

g

GE

This UPS is only designed to operate in a wye-configured electrical system with a solidly grounded neutral.

In case of 3-wire utility input the following solutions are possible:

1- Connection of a “3-wire kit” between Utility Input and Neutral of the output transformer.

Attention: With this configuration, load can only be connected phase-phase.

Absolutely no load connection permitted to the Neutral of the output transformer.

In a RPA configuration with 3-wire kit, it’s most important to connect the Neutrals of the UPS outputs together (see Fig .3.8.2-2).

Cable section for this connection shall be not less then AWG 1.

Fig. 3.8.2-2 3-wire kit for RPA Parallel System

2- Bypass transformer.

In this case the Neutral of wye secondary winding must be connected to the Neutral of the output transformer.

Contact your Service Centre, which will help you to find valuable solutions.

OPM_SGS_ISG_M22_M30_0US_V011.doc

24/38

Installation Guide SG Series 225 & 300 kVA

Image 24

Contents SG Series Copyright 2003 by GE Industrial Systems SystemsDear Customer Start UP and CommissioningPreface Table of contents Installation BatteryGeneral StorageSafety instructions when working with battery Safety symbols and warnings Safety warningsRisk of electric shock PE Earth GND Ground Protective Grounding TerminalLayout Layout SG Series 225 and 300 KVADimensions and weight Weight SG Series 225 and 300 kVATransport Forklift Crane Transport UPS only in upright positionStorage of Battery DeliveryStorage of the UPS Place of Installation Positioning of the UPS SG SeriesCheck -26A of the NEC code for specific requirements Openings for input and output cable connections Fixing of the UPS cabinet on the floorBattery location 1-5 RPA system dispositionVentilation and Cooling CFMTake care not to damage the UPS when moving by forklift UnpackingPacking material recycling Electrical Wiring Separate input Rectifier & Bypass recommendedCommon input Rectifier & Bypass Input/output over current protection and wire sizing Neutral current could be greater than the phase currentsPhase, 3 wire plus Ground Phase, 4 wire plus GroundWire positive and negative plus Ground See .7.1-1Copper Wiring Connection Wire Size Range1-1 Access to the input / output connections Power connection with common input utility Common Input Rectifier / BypassOutput Load Cable section for this connection shall be not less then AWG Power connection separate input utility L1-1 Rectifier Phase a L1-2L2-1 Rectifier Phase B L2-2 L3-1 Rectifier Phase C L3-2BR1 Battery connection BatteryPositive pole of the Battery Do not insert the Battery Fuses before the commissioningSetup for SG Series when functioning as frequency converter Manual Bypass, serious damage to the Load could resultPower Wiring of Parallel Units 1 RPA Parallel SystemUPS Parallel Control BUS ConnectionTerminal units Intermediate unitsAccess to the control bus connection Control BUS Cable LocationControl bus cables connection Interface IM0048 going to P13Control bus cables routing 11-3 Control Bus cable routing and connectionCustomer Interface Customer Interface15, 16 Or J2 17, 18 NO, C, NC General Alarm 18, 19 Or J2 20, 21 NO, C, NC Acoustic AlarmOutput potential free contacts Or J2 / 1, 2 NO, C, NC Utility FailureGND EPO Emergency Power Off Input contact JP338/38