Liebert 130 kVA - Manual (Page 102)

User Manual
Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V
82
10.3 BYPASS ISOLATION CUBICLE
10.3.1 Introduction
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 .
10.3.2 Termination
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.
10.3.3 Indication & 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 .
10.3.4 Protection
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.