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SECTION 4
4.4.3 PARALLEL CABINET OPERATION
This procedure is to be used to turn on the Paralleled Cabinet System for the first
time, or when service has been performed on a cabinet. Proceed as follows:
PARALLEL CABINET OPERATION
STEP 1:
Inspect the installation. Verify that the wiring is correct (refer to Section
3.8, figure 3.8.2). Open all Circuit Breakers in the Output Load Center.
STEP 2:
Rotate the MODE SELECT switch to the OFF position for each Cabinet in
the System. Rotate the FREQUENCY SELECT switch to the SLAVE
position for each Cabinet in the system. This should cause an EMER OFF
in ALL Cabinets.
STEP 3:
Select ONE Cabinet to be MASTER. Operate the ONE MASTER Cabinet
as a Single Cabinet Power Source as described in section 4.4.2.
STEP 4:
Verify operation of each Cabinet individually as described in steps 2 and 3
above.
STEP 5:
Rotate the MODE SELECT switch to OFF for all Cabinets. Select ONE
Cabinet, in the middle of the System, to be MASTER. Select all other
Cabinets to be slaves. Disconnect any load from the output of the system.
Close all of the Circuit Breakers at the Output Load Center. Press
OUTPUT then f1 keys on all Cabinets in the system to monitor each
Cabinet's output voltages and currents.
STEP 6:
On the MASTER, turn the Volts Adjust down to 0 VAC. Rotate the MODE
SELECT to ON and press START/RESET. Select one and only one
SLAVE. Rotate its MODE SELECT to ON, and press START/RESET.
Verify the MASTER and SLAVE output currents are less than 10 amps.
STEP 7:
On the MASTER, turn the Volts Adjust up to 120 VAC. Verify the MASTER
and SLAVE output currents are less than 10 amps. If output currents are
large, check for miswires.
STEP 8:
Verify operation of each SLAVE individually as described in steps 6 and 7
above.
STEP 9:
Turn ON all Cabinets in the system. On the MASTER, rotate the MODE
SELECT switch to standby and verify all cabinets go to STANDBY. On
the MASTER, press EMER OFF and observe all Cabinet go to EMER
OFF.
STEP 10:
Connect the load. Bring up the MASTER, then all Cabinets to the
STANDBY state. Leave the MASTER in the STANDBY state. Rotate the
MODE SELECT switch to ON for all the SLAVES. Rotate the MASTER
MODE SELECT to ON. Verify all Cabinet output currents are ±10% of
each other. The system is now fully operational.
Pacific Power Source ©2013
4-22
OPERATION
Document # 126050-10 Rev E
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