© 2018 Power-Tronics, Inc.
12
Connection C
(
See page 13
if the generator will be paralleled using this connection)
Connection C
is a Half-Wave rectified configuration, which allows a maximum output of
52VDC @ 5A
with an input voltage of 120VAC.
This connection is typically used on low voltage excitation fields (generally referred to as
32V fields) or on shunt control fields where the full-load excitation voltage is less than
32VDC.
Note that the maximum input voltage to the XR5B-400 Universal Voltage regulator
is 139VAC in this configuration!
DO NOT input 240VAC into the XR5B-400!
Severe regulation problems may result! For use on 480V systems, either connect the
regulator to the winding center taps T7 to T0 (
See Page 6
) or use a
480-120V step-
down transformer rated at 500VA (Preferred for superior regulation accuracy).
Connecting the input of the XR5B-400 to 2 different legs of the generator through a
transformer will result in greater regulation accuracy than when connecting line-neutral
as shown in the diagram below.
NOTE:
It is not necessary
to jumper terminals
7 and 8 if not using
the Remote Voltage
Adjustment!
XR5B-400 Specialty Series
Universal Voltage Regulator
NOTE:
If the generator is to be operated below 400 Hz, a disconnect or switch should be installed in
series with the incoming power to terminals #1 and #2 on the XR5B-400.
NEVER install a switch or breaker on the DC or Exciter side of the voltage regulator!
Only install a switch or disconnect on the AC Side of the regulator!
139VAC
MAX!
100K, 2W
Regulator On/Off
Switch
Rate for:
240V @ 10A
