- Eaton UPS User's Guide

UPS STARTUP

Eaton 9170

UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality

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.