Modes Of Operation; Table 12 Circuit Breaker Abbreviations - Liebert 1000kVA Operation & Maintenance Manual

3.3

Modes of Operation

This section illustrates the flow of power through circuit breakers, switches and UPS components
during various modes of operation. An SCCT with three modules is shown. The same modes of opera-
tion apply to all configurations of the Liebert Series 610 UPS multi-module system. Highlighted
(thick) lines in the diagrams indicate power flow and power availability.
These illustrations show a three-breaker maintenance bypass because it is commonly used. Your instal-
lation may have a two-breaker, three-breaker or four-breaker maintenance bypass or none at all.
These illustrations do not show an alternate power source (generator) and automatic transfer switch
(external to the UPS) that might be present at your installation.
Table 12 below lists abbreviations for circuit breakers used in this manual.
Table 12 Circuit breaker abbreviations
Abbreviation
BFB
BIB
CB1
CB2
MBB
MBD
MIB
RIB
SBB
Circuit Breaker
Bypass Feeder Breaker
Bypass Input Breaker
Module Input Breaker
Module Output Breaker
Maintenance Bypass Breaker
Module Battery Disconnect
Maintenance Isolation Breaker
Rectifier Input Breaker
System Bypass Breaker
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Operation