If genrator not build up voltage , How u can Manually
Answers were Sorted based on User's Feedback
Answer / k.prakashchandra
You can use outside DC source to excite the field
|Is This Answer Correct ?||4 Yes||0 No|
This is usually done by flashing the alternator. Turn of
Disconnect the AVR and connect the battery (9-12 volts)
across the field. Must be same polarity as the AVR. Run
generator and check output voltage. Voltage will usually be
higher then normal. if no voltage or unbalanced voltage the
windings or rotating diodes are faulty.
Stop generator and disconnect battery and reconnect AVR.
Try starting generator set again and check if voltage
present. If still not working replace AVR and try again.
|Is This Answer Correct ?||1 Yes||0 No|
Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?
Will a bulb glow if we connect it between the phase and earth instead of earthed neutral?
From, which load current range ( upper - lower limit current)can Air circuit breaker used for in electrical circuit.
What are all the points to be checked while decanting diesel from tanker lorry to HSD YARD
what is difference between earhing and neutral
When capacitor bank connect on line. It's draw some current but it's current not increase of main line ammeter. Why?
why we r used DC megger insted of AC megger?
what is the full name of ELCB &MDB <MCB
what collector is used for 100kmph-120kmph tracion application?
In case of 3 phase motor why it is called single phasing by failure of one phare unless there is rest two phase are acting. ?
why does make gain margin and phase margin on same plot.?
In which connection the distribution T/F is connected? a) ▲ / Y b) Y / ▲ c) ▲ / ▲ d) Y / Y