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 XR5C Universal Voltage regulator is
139VAC in this configuration! DO NOT input 240VAC into the XR5C! 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 XR5C 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.
If the generator is to be operated below 50/60 Hz, a disconnect or switch should be installed in
series with the incoming power to terminals #1 and #2 on the XR5C.
NEVER install a switch or breaker on the DC or Exciter side of the voltage regulator!
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