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Table 6.1 Control Functions
No. Device Name / Function Normal Status
During Operation
Remarks
c
52R
Main circuit AC input circuit breaker
When the AC input is normal, power is
supplied to the UPS through this circuit
breaker.
ON
d
72B
Main circuit DC input circuit breaker
When AC input has been cut off, power is
supplied from the battery to the UPS
through this circuit breaker.
ON
When the circuit breaker
is tripped in manual
mode, reset it by grasping
the handle and pulling it
down or to the right.
e
52C
Bypass AC circuit breaker
When bypass power is supplied, power is
supplied to the load through this circuit
breaker.
ON
f
52M
Maintenance bypass AC circuit breaker
When bypass power is supplied for UPS
maintenance, power is supplied to the
load through this circuit breaker.
OFF
g
52L
AC output circuit breaker
While UPS power or bypass power is
supplied, power is supplied to the load
through this circuit breaker.
ON
h
8A
Control power source switch
When AC input is normal, pressing this
switch supplies power to the control power
source.
ON
Certain systems are
also provided with the
switch 8D.
i
6CH
Precharge circuit button
Pressing this button supplies power to the
circuit that precharges the DC electrolytic
capacitor before power is supplied to
circuit breaker 52R.
ON
6.2 Circuit Configuration
Figure 6.2 Standard Circuit Configuration
～
～
72B
52R
UPS
AC INPUT
BATTERY
BYPASS
AC INPUT
52C
AC OUTPUT
52L
52M