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 continuous output of 32VDC @
8A 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 XR8 Universal Voltage regulator is 139VAC in this
configuration! DO NOT input 240VAC into the XR8! 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 XR8 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 XR8.
NEVER install a switch or breaker on the DC or Exciter side of the voltage regulator!
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