PHASE CHECK
Eaton FERRUPS FE/QFE UPS (500 VA–18 kVA) Installation Guide
S
164201403 Rev B
www.eaton.com/powerquality
70
10.
If the bypass switch is a Break-Before-Make type, skip this step and
proceed to Step 11.
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)
6 to 9
Vac
External Bypass Switch (BPE-02, BPE-04, or BPE-05)
7 to 11
Vac
8 to 12*
Vac
*60 Hz, 208 or 240V only.
11.
Measure the AC voltage between the following points on the
terminal strip. This reading must be no more than 1 Vac; if it is, call
your service representative.
Internal Bypass Switch
N (AC to UPS Load) to
N (AC Line Input)
Vac
External Bypass Switch (BPE-01)
5 to 8
Vac
External Bypass Switch (BPE-02, BPE-04, or BPE-05)
6 to 10*
Vac
8 to 12**
Vac
*60 Hz, 208 or 240V only.
**60 Hz, 120V or 50 Hz, 220/230/240V.
