GENERATOR PRODUCES LOW VOLTAGE WHEN LOAD APPLIED

CAUSE

CHECK AND REMEDY

Excessive load

Reduce load. The load on each leg should be evenly balanced, and rated current should

 

not be exceeded on any leg.

Large motor starting or low load

Motor starting currents are too large for the generator. When starting multiple motors,

power factor

sequence the motors and start the largest motors first. Reduce lagging power factor load.

Driver speed droop or belt slip

Check driver. If belt driven, check belt tension. Check under frequency setting on

 

regulator. Under frequency voltage roll-off may be activated.

Reactive droop

If the generator is equipped for parallel operation, some droop is normal as reactive load

 

increases. When operating as a single unit, the parallel CT can be shorted to eliminate this

 

effect. Refer to Regulator manual.

Line drop

If voltage is proper at generator terminals but low at load terminals, increase external wire

 

size.

Defective diodes, suppressor, or

Test the generator using the 12 volt battery test as specified in the testing section. If the

windings

results indicate generator problems, perform insulation, continuity, and diode tests as

 

specified in the testing section.

GENERATOR PRODUCES FLUCTUATING VOLTAGE

CAUSE

Fluctuating engine speed Regulator stability Regulator external rheostat Defective rectifier assembly Loose terminal or load connections Defective regulator

CHECK AND REMEDY

Check engine and governor systems for malfunctions. Check load for fluctuation.

Adjust Regulator stability. Refer to Regulator manual.

Replace defective or worn rheostat. Use shielded cable to minimize electrical noise.

Check assembly for loose connections. Test the diodes as specified in the test section.

Improve connections both mechanically and electrically.

Replace regulator.

GENERATOR PRODUCES HIGH VOLTAGE

CAUSE

CHECK AND REMEDY

Faulty metering

Check voltage with separate meter at generator terminals.

Incorrect connections

Verify generator connections. Refer to drawings supplied with the generator or connection

 

diagrams in this manual.

Regulator adjustments

Adjust regulator. Consult regulator manual.

Leading power factor

Check the power factor of the load. If power factor is leading, change load configuration.

 

Excessive leading power factor (capacitors) can cause voltage to climb out of control.

Incorrect regulator connection

Verify regulator voltage sensing is connected correctly. Consult regulator manual.

Defective regulator

Replace regulator.

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Image 43
Baldor TS25, BALDOR GENERATORS Generator Produces LOW Voltage When Load Applied, Generator Produces Fluctuating Voltage