Powerware 9155 UPS20-30kVA - Manual (Page 18)

18 UPS 20-30 kVA, 230 V 0/60 Hz output
User’s Guide
1026743
Revision B
Wiring procedure
The power cable terminals are located in the bottom of the UPS unit. The service personnel is
responsible for the correct electrical installation.
The installation procedure:
1. Remove the cover plate(s) at the bottom or back of the UPS cabinet to make a route for
input and output wires. Refer to the dimensional drawing for the correct location at the
back of the unit.
2. Route the cables through the hole at the bottom or back of the unit. If more installation
space is needed the lowest battery shelf can be removed temporarily.
3. Connect the conductors of the rectifier and bypass input cables to the proper terminals.
4. Connect the conductors of the load cable to the proper terminals.
. Connect the conductors of an external battery cabinet cable to the external battery +, - and
PE terminals. Check for the correct polarity. See also section External Battery Cabinet (EBC)
installation procedure.
Warning!
If available, the internal battery has to be disconnected first because the external
battery terminals are hazardous due to the parallel battery string.
The IEC/EN 62040-1 safety instructions require the fitting by the user of a warning label on all
primary power isolators installed remote from the UPS area. The warning label for electrical
maintenance personnel shall carry the following wording or equivalent:
“ISOLATE UNINTERRUBTIBLE POWER SUPPLY (UPS) BEFORE WORKING ON THIS CIRCUIT.”
A readily accessible disconnect device shall be incorporated in the building installation wiring
as shown in diagrams.