Seite 40
Tr
ouble sho
oting
8.3.
Troubleshooting generator
FAULT
CAUSE
SOLUTION
Alternator does not excite
Insufficient residual voltage
Connection break
Broken diode bridge
Insufficient speed
Windings breakdown
Poor contact with the brushes
Excite the rotor using a battery
Reset the connection
Replace the diode bridge
Adjust speed regulator
Check winding resistance and replace
damaged part
Clean and check the collector
Low no-load voltage
Reduced speed
Poor brushes contact
Winding failure
Broken three-phase bridge
Reset speed for drive motor
Check, clean or replace the brushes
Check resistance and replace damaged
part
Replace three-phase diode bridge
Correct no-load voltage but too
low with load
Low speed with load
Failed compound
Defective winding rotor
Load is too high
Adjust speed regulator
Check the compound and replace if
necessary
Check winding resistance and replace
damaged part
Correct no load voltage but too
high with load
Appliances with capacitors on load
Air gap of compound too excessive
Defective winding compound
Wrong connection of phases
Reduce revolving speed
Reduce air gap of compound
Check winding resistance and replace
the compound if it broken
Check and adjust the connection of
phases
Unstable voltage
Uneven speed
Poor contact on collector
Check and repair speed regulator
Check and clean the slip-ring and the
brushes
Loud operating noise
Bad coupling
Short circuit in windings or load
Faulty bearing
Check and correct coupling
Check windings and loads
Replace faulty bearing
Содержание Eisemann T 4411
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