TROUBLESHOOTING - GENERATOR
As with any machine, trouble may develop in electrical generators. It may be due to long service or neglect
of regular maintenance. Servicing, and checking. Should trouble develop, the following instructions will be
helpful in tracing the cause and making repairs.
SPEED DEVITIONS:
The generator speed should be maintained at rated nameplate speed. The frequency and voltage of the
generator output depends on speed. If the generator runs slower than rated speed, the voltage will drop
off.
NO VOLTAGE
CAUSE CHECK
AND
REMEDY
Loss of residual magnetism in
Flash Field.
exciter field poles.
Open in stator windings
Check for continuity in windings. Return to factory for
repair if open
Open or short in rotating rectifiers.
Check rectifiers.
Short Circuited.
Clear lead to restore voltage build-up.
Open in alternator field
Check for continuity and return rotor to factory for
repair if field coils are open.
Shorted exciter armature
Check for short and replace if faulty.
Shorted leads between exciter
Test and repair
armature and generator field.
LOW VOLTAGE
CAUSE CHECK
AND
REMEDY
Excessive load.
Reduce load. With 3 phase generators, the load on
each leg should be as evenly balanced as possible
and should not exceed the rated current on any leg.
Low Speed.
Check engine for malfunction or system for overload.
Line loss.
Increase size of line lead wire.
Summary of Contents for STANDBY PERMANENT MOUNT SERIES
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