Powerware 9155 UPS20-30kVA - Manual (Page 47)

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
Shutdown procedure
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.
Local tie panel solutions
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.