Section III
Operation
Page 3.10
BP
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STATIC SWITCH BYPASS CIRCUIT BREAKER: Not available with input
isolation transformer. When closed, allows bypass input to supply power to the Static
Switch.
OUTPUT BREAKER: When closed, connects the critical load to the inverter and
static bypass switch.
3.6 UPS Operating Procedures
It is important for safety and the protection and performance of the UPS that the
step-by-step instructions for each procedure be followed in the sequence given.
3.6.1
System Startup Procedure
Before initiating UPS startup, make sure that:
•
All circuit breakers/switches are OFF (open).
•
The DC (Battery) disconnect switch is OFF (open).
Then -–
Each of the following steps must be completed before going to the next step.
Failure to do so may result in interruption of power to the critical load.
1. (NOTE: If the UPS does not have an input isolation transformer, skip this step.) If
the UPS has an optional input isolation transformer (see one-line diagram in
Section II), close the MAIN INPUT CIRCUIT BREAKER. This will activate
the input transformer which supplies control power, rectifier, SBS and
maintenance bypass.
2. Rotate UPS CONTROL switch knob
clockwise to ON to energize the system
or DSP logic. If this screen appears, the
UPS is not in operable condition. Phone
Service Hotline at (800) 777–8922 or
(214) 272–8000 for assistance.
. Checksum Bad
Service Required
