3.2.8Emergency 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 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 3.3.3 - Shutdown Procedures.

Figure 55 Emergency Power Off

 

 

 

 

 

RIB

 

 

 

 

 

RIB

 

 

 

 

 

RIB

 

 

 

 

BFB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UPS #3

UPS #2

UPS

#1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CB1

 

 

 

CB1

 

 

 

 

CB1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SBS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

 

 

R

 

 

 

R

 

 

 

 

 

BIB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SBB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

 

 

I

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

MBB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CB2

 

 

 

CB2

 

 

 

CB2

 

 

System

 

 

 

 

SKRU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Controls

 

 

 

 

 

 

 

 

 

 

Output MIB

 

 

 

 

 

 

 

 

 

SCCT

 

 

 

 

 

 

 

 

 

To Critical Load

 

 

 

 

 

 

 

 

 

 

 

MBD

 

 

MBD

 

 

 

MBD

 

 

 

 

 

 

 

 

 

SCCT

Battery

Battery

Battery

(can accommodate up to 6 UPS modules)

 

 

 

 

 

 

 

 

 

86

Operation

DISCONTINUED

 

 

PRODUCT

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Image 92
Liebert Series 600T manual Emergency Power Off