Baldor ISO9001 manual No Voltage, LOW Voltage

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.