Powerware UPS20-30kVA User Manual

47

UPS 20-30 kVA, 230 V 0/60 Hz output  

User’s Guide

1026743 
Revision B

Figure 25. System bypass switch of the optional SPM

While system is running and UPSs are supporting load, there are two different ways to perform 
a shutdown. The user can select either to shutdown the whole system or only one UPS.

1. 

Select TURN SYSTEM OFF from the main menu Õ All the UPSs in the system will go to 
stand-by mode.

2.  Select TURN UPS OFF Õ Only the selected UPS will go stand-by mode.

 

Either 1 or 2 is selected ¿ button needs to be pressed for  seconds.

 

When UPS is in stand-by mode it still charges its batteries and uses cooling fans. Stand-
by mode possibles a fast restart. If some UPS or all the UPSs in the system need to be 
shutdown completely, proseed to item 3.

3.  Select TURN UPS OFF and press and hold ¿ button for  seconds. There shall be an 

indication sound during the hold.

4.  UPS shalll do a shutdown routine.

.  Turn the battery and input circuit breakers to off position to finalise the shutdown procedure.

The internal wiring diagrams of tie cabinets can be used as a reference when designing local tie 
panels.

Parallel UPS configurations require a tie panel at the system output. It must facilitate service 
switches for each UPS module output. The system bypass swicth is optional but helps when 
doing the maintenance for the hole parallel UPS system. It’s recommend to source cabinet, 
cables, busbars, terminals, fuses, switches and breaker components from the local market.