Powerware Ferrups FE/QFE 500VA - Manual (Page 72)

Phase Check
66 Powerware ® FERRUPS FE/QFE UPS (500 VA–18 kVA) Installation Guide
:
Rev A www.powerware.com
10–18 kVA: If you have an external battery cabinet(s) with a DC
switch, turn the switch to the ON position.
6. Turn the UPS ON/OFF switch to the ON position. The switch
is located on the back of the 500 VA–3.1 kVA models and on
the front of the 4.3–18 kVA models. The load should still be
disconnected at this time.
After a short startup test, the READY indicator blinks for a few
seconds and then remains illuminated. The UPS is ready to
supply output power.
7. Turn the bypass switch to the UPS position.
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:
:
Internal Bypass Switch: 6 and 7 or 6 and 8
:
External Bypass Switch: N and X1 or N and X2
DO NOT connect any 120V LOAD to the 88V terminals.
Internal Bypass Switch
AC to UPS Load Measurement AC Line Input Measurement
X1 to X2 Vac L1 to L2 Vac
N to X1 Vac N to L1 Vac
N to X2 Vac N to L1 Vac