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
62
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