User Manual

Hipulse - Single Phase ‘1+N’ UPS System

130 kVA - 110V

10.3 BYPASS ISOLATION CUBICLE

10.3.1Introduction

Bypass Isolation Cubicle is placed in the Bypass input path of the UPS. It consist of VEE Connected –Transformer of rated capacity to provide 3 phase to 1 phase transformation .

10.3.2Termination

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

The output of the cubicle is available on the RU, NU terminals . which is fed 1 phase Bypass Supply to the UPS Panel.

10.3.3Indication & Metering

LED’s are used to monitor availability of Input voltage before the Vee Connected Transformer and after it ,which are seen on the Mimic Panel

Output voltage and Phase current is measured using Voltmeter & Current meter which are seen on the Mimic Panel .

10.3.4Protection

Incoming 3 pole MCCB is used as Protective Device before the Vee Connected transformer ,Control fuses are used for protection of Voltmeter.

Utility socket is provide for single phase supply.

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Liebert 130 kVA user manual Bypass Isolation Cubicle