5 off battery, Figure 46 load on ups-battery not available, Off battery – Liebert 610 User Manual

Page 69: Figure 46 load on ups—battery not available, Caution

Operation

3.3.5 Off Battery

The battery plant can be disconnected from the UPS, if required for battery maintenance, by opening

the module battery disconnect (MBD) circuit breaker. In this situation the UPS module will continue

to supply conditioned power to the critical load, but if input power fails the UPS system cannot sup-

ply power to the load.

Figure 46 Load on UPS—battery not available

CAUTION

When the UPS system is operating with the module battery disconnect (MBD) circuit

breaker(s) open, the critical load is not protected from loss of the utility source power.

OUTPUT

Controls

Bypass CB

INPUT

Static

Bypass

Switch

RIB

BFB

Critical

Load

AC Output

MBD

Static

Switch

Disconnects

THREE BREAKER MAINTENANCE BYPASS SWITCHBOARD

CONTROL POWER

UPS MODULE

MAIN INPUT

SWITCHGEAR

Rectifier/

Charger

Inverter

Battery

BIB

MBB

MIB