Liebert 130 kVA user manual Termination, Indication & Metering, Protection

User Manual

Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V

10.2 INPUT TRANSFORMER CUBICLE

10.2.1Introduction

The Input Transformer Cubicle is placed in the Input supply path of the UPS . It consist of Star - Star OR Delta - Star transformer of rated capacity to provide Isolation from the Input Distribution supply to the UPS input.. The Cubicle also consist of Battery Breaker with its Battery Trip PCB of the respective UPS.

10.2.2Termination

The Incoming Supply from the Customers distribution is fed as input to the Input Transformer Cubicle. The incoming supply 3ph,4wire is fed to RI ,SI,TI,NI terminals .

The Battery Breaker input from the UPS is fed to +R1 , -R1. The output of the Transformer cubicle is available on the RU,SU,TU,NU terminals , the Battery Breaker output is fed to BATTERIES through terminals +B ,-B terminals

10.2.3Indication & Metering

LED’s are used to monitor availability of Input voltage before the Isolation Transformer and after the Transformer which are seen on the Mimic Panel.

Incoming L-L voltage and Phase current is measured using Voltmeter & Current meter which are seen on the Mimic Panel , A selector switch S1 is used to select RY ,YB, BR Voltage and R,Y,B Phase currents

10.2.4Protection

Incoming 3 pole MCCB is used as Protective Device before the Isolation transformer, Control fuses are used for protection of Voltmeter and Fans Cubicle Battery path MCCB is used as Protective Device in Battery path

Utility socket is provide for single phase supply

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