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UPS STARTUP
Eaton 9170
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UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality
73
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 phase. Measure
the voltage between the following points on the terminal block and
record in the spaces below. These measurements must be no more
than 20 Vac; if they are, call your service representative.
Terminal 7 to 11
Terminal 8 to 12
12. Measure the AC voltage between the following points on the
terminal block and record in the space below. 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 cover and UPS front covers 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.