UPS Startup
70
Powerware
®
9170
+
UPS User’s Guide S Rev B www.powerware.com
11. If the bypass switch is a Break-Before-Make type, skip this step
and proceed to Step 12.
If the bypass switch is a Make-Before-Break type, verify that the
AC voltages from the UPS and the AC line input are in p hase.
Measurethevoltagebetweenthefollowingpointsonthe
terminalblock.Thesemeasurementsmustbenomorethan
20 Vac; if they are, call your service representative.
Terminal 7 to 11
Terminal 8 to 12
12. MeasuretheACvoltagebetweenthefollowingpointsonthe
terminal block. This reading must be no more than 1 Vac; if it is,
call your service representative.
Terminal 6 to 10
13. Switch the bypass switch to LINE. Measure the voltage to the
protected equipment (at the load distribution panel) and verify
that it is correct.
14. Switch the bypass switch to UPS and verify the voltage to the
protected equipment is still correct.
15. Reinstall the bypass switch front panel and UPS front cover
panels using the original screws.
16. If the UPS will not be operated immediately, switch the bypass
switch to SERVICE and push in the DC disconnect switch button
on the back panel of the external battery cabinet closest to the
UPS. Otherwise, skip to Step 19 to continue the UPS startup.
17. When starting the UPS, apply input power to the UPS by closing
the service circuit breaker.
If external battery cabinets are installed, close the DC
disconnect switch button on the back of each external battery
cabinet. Insert the switch key supplied with the cabinet into the
button and turn clockwise 1/2-turn. Pull the button out to close
the switch. Turn the key back counter-clockwise, and remove
the key.
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