Westerbeke BCGB Service Manual page 69

LOW VOLTAGE • ROTATING FIELD AUXILIARY WINDINGS TESTS
Testing the Rotor Field Auxiliary Windings
With the diode removed, both leads for the first group of
rotating field/auxiliary windings will be isolated with no
interference from a possibly faulty diode.
Check the resistance value of the rotating windings by
placing the ohmmeter's probes across the two exposed
leads.
ROTOR WINDINGS RESISTANCE VALUES
Single Capacitor 3.8 ohms
Dual Capacitor 4.0.ohms
Dual Exciter Circuit 4.0 ohms
TESTING THE WINDING LEADS
Testing Continuity
Check that no continuity exists between either of the wind-
ing leads and the generator shaft. If continuity is found,
there is a short in the windings.
Repeat the above tests on the second set of windings on
the opposite side.
TESTING FOR
CONTINUITY
[TEST BOTH LEADS]
Engines & Generators
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