Shut Down Procedure; Startup Procedure For Parallel System - BPE PS50 Series User Manual

that there are no internal UPS faults
◆ Open the front and rear doors of the UPS to be easily access to the main power
switches
◆ Switch ON the output switch;
◆ Switch ON the bypass and mains switch;
◆ Switch ON the battery breaker;
The UPS powers from the static bypass instead of the maintenance bypass.
◆ Switch OFF the maintenance bypass switch, then the output is supplied by the
bypass of the modules.
◆ Put on the maintenance switch cover (1.2m cabinet).
The rectifier will operate normally after 30 seconds. If the inverter works normally, the
system will be transferred from bypass mode to normal mode.

4.2.5 Shut down procedure

CAUTION!
This procedure should be followed to completely shut down the UPS and the
LOAD. After all power switches, isolators and circuit breakers are opened,
there will be no output.
◆ Press the INVERTER OFF key on the LCD display ;
◆ Switch OFF the BATTERY breaker ;
◆ Open the UPS door to easily access to the main power switch ;
◆ Switch OFF the input switch.
◆ Switch OFF the OUTPUT switch. The UPS shuts down ;

4.2.6 Startup procedure for parallel system

 Connect parallel cable, input/output cable, and battery cable well; modify the parallel
board jumpers correctly.
 Measure the positive and negative battery pack voltage. Battery switch is opened
temporarily.
 Switch ON the output switch at the front door.
 According to the startup procedure for single unit, set the operation mode of each
UPS: single mode is changed to parallel mode; set the parallel number for each
UPS; up to 4 units can be parallel; set the ID of each cabinet, the ID of each unit
must be different.
 Switch ON the input switch. Close the external input switch and start from mains.
 After start from mains, check the LCD interface of each UPS to see if the ID, VA is
the same with the actual values.
 Switch ON the external battery switch of each UPS. Check if the charging current
displayed in LCD is normal.
Note!
The UPS cannot be parallel until each single unit is normal.
WARNING!
Wait for about 5 minutes for the internal D.C. bus bar capacitors to be
.
completely discharged
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