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Table 8.9 Changing From Maintenance Bypass to UPS Power Supply
Step Procedure LCD/LED Status (After Execution)
1 Same as steps 1-4 in
Section 8.3.1 “Startup”
2
Turn OFF maintenance
bypass AC circuit breaker
52M. *
,
**
,
***
3 Same as steps 5-11 in Section 8.3.1 “Startup”
→Change to UPS power supply complete.
* During load operation, ALWAYS operate the circuit breakers in the following order:
52C ON → 52L ON → 52M OFF
** UPS power supply is disabled when the 52M circuit breaker is in the on state.
*** This operation is different from that displayed in the help message on the screen.
Be sure to perform the operation as described here.
BATTERIES
AC
SWITCH
UPS
BYPASS
DISCHARGE
FLOAT CHARGE
EQUAL CHARGE
～
AC INPUT
～
CONVERTER
～
INVERTER
～
AC OUTPUT
BYPASS INPUT
～
BATTERIES
AC
SWITCH
UPS
BYPASS
DISCHARGE
FLOAT CHARGE
EQUAL CHARGE
～
AC INPUT
～
CONVERTER
～
INVERTER
～
AC OUTPUT
BYPASS INPUT
～
BYPASS
MOVE #52R TO ‘ON’ POSITION
BYPASS
MOVE #52R TO ‘ON’ POSITION
MCCB
52C 52M 52L
ON
OFF
ON
52R 72B
OFF OFF
MCCB
52C 52M 52L
ON
ON
ON
52R 72B
OFF OFF