PHASE CHECK
Eaton FERRUPS Rack Mount UPS (850 VA–7 kVA) Installation Guide
S
164201425 Rev 1
www.eaton.com/powerquality
76
8.
Use an AC voltmeter to measure voltages on the terminal strip
inside the bypass switch cabinet (refer to the label on the back of
the switch's lower front cover panel for the terminal numbers).
Record your measurements in the following chart according to the
type of bypass switch installed. The voltages in the first column
should be nearly equal to the voltages in the second column. If the
values differ by more than a few volts, check the terminal strip
connections and correct any wiring problems.
C
A
U
T
I
O
N
If the AC input voltage is 208V, measure 88 Vac between the AC output terminals: 6 and 7
or 6 and 8
DO NOT connect any 120V LOAD to the 88V terminals.
External Bypass Switch
BPE-01
AC from UPS
Output
Measurement
AC Line Input
Measurement
5 to 6
Vac
8 to 9
Vac
BPE-02, BPE-04, or BPE-05
AC from UPS
Output
Measurement
AC Line Input
Measurement
7 to 8*
Vac
11 to 12
Vac
6 to 7
Vac
10 to 11
Vac
6 to 8*
Vac
10 to 12
Vac
*60 Hz, 208 or 240V only.
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