Westerbeke BCGB - Page 70

RESIDUAL VOLTAGE - EXCITER CIRCUIT TESTS
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DUAL EXCITER
SINGLE CAPACITOR
t.::~-~
~J DUAL CAPACITOR
CI--...J
TESTING THE EXCITER WINDINGS
AC voltage can be measured across the capacitor(s) while the
generator is operating. 1bis voltage may be as high as 400 to
500 volts AC. 1bis voltage buildup is ~ccomplished as the
exciter windings charge the capacitor(s) and the capacitor(s)
.
discharge back into the exciter windings. 1bis AC voltage
reading is taken between the #60 Hertz connector and the #
connection plugged into the capacitor(s) while the generator
is operating at its rated Hertz (60.5 - 61.5 for gasoline.models
and 61.5 - 62.0 for diesel models). This flow of saturating
AC in the exciter windings produces a phase-imbalance type
of field that effects the auxiliary windings: a beneficial result
that produces good motor starting characteristics for this type
of generator.
Engines & Generators
63
MEASURING
ACVOLTAGE
GENERATOR
RUNNING