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3.3.7 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 user-provided 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 ini-
tiated 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 3.4.4 - Shutdown Procedures.
Figure 48 Emergency power off
Controls
Bypass CB
Static
Bypass
Switch
RIB
BFB
Critical
Load
AC Output
Static
Switch
Disconnects
THREE BREAKER MAINTENANCE BYPASS SWITCHBOARD
CONTROL POWER
UPS MODULE
MAIN INPUT
SWITCHGEAR
OUTPUT
CB
Rectifier/
Charger
INPUT
CB
Inverter
Battery
MBD
BIB
MBB
MIB