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Phase Check
67
Powerware
®
FERRUPS FE/QFE UPS (500 VA–18 kVA) Installation Guide : Rev A www.powerware.com
External Bypass Switch
BPE-01
AC from UPS
Output
Measurement AC Line Input Measurement
5to6 Vac 8to9 Vac
BPE-02, BPE-04, or BPE-05
AC from UPS
Output
Measurement AC Line Input Measurement
7to8* Vac 11 to 12 Vac
6to7 Vac 10 to 11 Vac
6to8* Vac 10 to 12 Vac
*60 Hz, 208 or 240V only.
9. If the bypass switch is a Break-Before-Make type, skip this step
and proceed to Step 10.
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 strip. These measurements must be no more than
100 Vac; if they are, call your service representative.
Internal Bypass Switch
X1 to L1 Vac
X2 to L2* Vac
*60 Hz, 208 or 240V only.
External Bypass Switch (BPE-01)
6to9
Vac
External Bypass Switch (BPE-02, BPE-04, or BPE-05)
7to11
Vac
8to12* Vac
*60 Hz, 208 or 240V only.