Remote Emergency Power Off; Figure 60 Emergency Power Off - Liebert 1000kVA Operation & Maintenance Manual

3.3.8

Remote Emergency Power Off

The Remote Emergency Power Off (REPO) mode is used to remove all power from the critical load.
The Remote Emergency Power Off control is a switch located remotely from the UPS system. It will
normally be in the same room as the critical load equipment. This mode can also be initiated by an
automatic contact closure in the same external circuit as the manually operated switch.
When you operate the Remote Emergency Power Off switch, all UPS circuit breakers are opened,
including the bypass circuit breaker. All power through the UPS is removed from the load. Typically,
the REPO circuit also opens the circuit breakers that provide power to the bypass lines and the UPS
controls.
Refer to 3.4.5 - Shutdown Procedures.

Figure 60 Emergency power off

UPS UPS
CB1
CB2
MBD
Battery
RIB RIB RIB RIB
#3 #3 UPS #2
CB1
R R
I I
CB2
MBD
Battery Battery
RIB RIB
UPS UPS #1 #1
CB1
SBS
R
SBB
I
System
CB2
Controls
Output
SCCT
MBD
(can accommodate up to 6 UPS modules)
81
Operation
BFB BFB
BIB
MBB
SKRU
MIB
To Critical Load
SCCT