Cramaco G2R 400 Serie Manual De Instrucciones página 14

4.4. GENERATOR WITH PARALLEL DISPOSITIVE THAT OPERATE ISOLATED
For this condition (single running) close A-B from the AEC 42-7. Normally, the factory ships the generator with a
bridge that will retire for march in parallel.
4.5 PARALLEL OPERATION
(see 2.2.4. paragraph)
5. VERIFICATION OF MAINTENANCE
5.1.
Is necessary periodically take out the dust, fuel oil, and dirt, that could be accumulated inside.
5.1.1.
All this chores must to be done with the machine off.
5.1.2.
If a dry cleaning is not enough, use cleaning instruments that do not affect the isolation. Is recommend to use solvents
of electrical use, and let it dry out with the ambient temperature.
5.1.3.
The generators that cover the emergency services (stand by), must stay on load for about 2 or 3 hours periodically
without letting go more than 2 or 3 months (depending on the ambient moistness)
5.2.
The machines have seal, pre-lubricated, standard bearing that don't require maintenance. It's must be change after
20000 hours or in case of high temperatures or noises.
6 POSSIBLE FAULTS AND THEIR CORRECTION
6.1.
The voltage oscillates or is unstable
Fault
The engine's velocity change
6.2.
Voltage falls to zero when the generator is on nominal voltage
Fault
Over-excitation protection was
Working
Regulator is failing
6.3.
The generator doesn't auto excite
Fault
The residual magnetism is a lot below the
normal
The velocity of the engine is not correct
The principal circuit of the excitation is
interrupted
The varistor is destroyed
Fault on the regulator
6.4.
The generator doesn't reach the nominal voltage
Fault
The rectifiers are destroyed
The motor velocity is not correct
The regulator's fusible is burnt
The regulator is failing
Verification and solution
Check the engine's velocity regulator
Verification and solution
Turn off the machine, check the fusible. Turn
on and see if it auto excite
Replace the regulator
Verification and solution
Apply an external excitation (terminals +,-)
through the battery, from 5 to 12 volts until the
outlet voltage rise automatically.
NOTE: If is used the uprooting battery of the
diesel, unplug the negative binding post
Adjust the velocity
Check connections
Unplug the varistor and verify
Change the regulator and send it to the
manufacturer.
Verification and solution
Verify the diodes and change them if is necessary
Adjust the velocity
Change fusible
Change regulator
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