Answer / sanjay

There can be one of the following reason for the problem :

1.The AVR may be faulty.

2.The conductor is of lesser current rating.

3.Loose connection/faulty cable termination

4.Load is quiet far off from generator.

Answer / dharmans

1.mainly in AVR RRA diodes problem or lose termination.

Answer / a.p.nanjappa

iT SEEMS THE EXCITATION SYSTEM IS NOT TUNED PROPERLY.

Answer / satya dev

There is a lot of reasons to droping thevoltage during the
load.

Electrical reason - 1. Excitation voltage is not build up
to the requiered limit.

2.Fuel pump actuator is not working properly.its required a
certain DC voltage for certain load.

Mechanical Reason- If the DG set is more than two cylinders
may be one piston is not working properly, may be push rod
of the piston got broken.

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