8 remote emergency power off, Figure 60 emergency power off, Remote emergency power off – Liebert 1000kVA User Manual
Page 87: Operation 81, Scct

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