What is the difference between AC and DC injection methods for rotor earth faul

What is the difference between AC and DC injection methods
for rotor earth fault protection

Question Posted / electrical engineer

1 Answers
2299 Views
NBVL, Asian Alliance Insurance, I also Faced
E-Mail Answers

What is the difference between AC and DC injection methods for rotor earth fault protection..

Answer / Akanksha Lohia

AC injection methods use alternating current to simulate earth faults in a rotor, while DC injection methods use direct current. AC injection can better represent actual fault conditions but requires complex equipment due to the need for transformers to generate the desired frequency. On the other hand, DC injection is simpler and more cost-effective but may not fully replicate real-world scenarios.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

please send me privious exam's queation papers of section engineer(electrical).

1 Answers RRB,

sir, how to select the cable size, what is the parameters use ang what is the formulas use for this cable size calculations. please tell me.

4 Answers ISRO, Power Grid,

what are safety measures in /control in diesal engine/ explain them?

1 Answers

Dear Sirs, I am a technical persons.In one of our Electrical Sub- Station, We have installed three numbers of 1250KVA ,11KV/0.415KV Transformer to feed the Factory load. We have found some abnormality. In one of our Transformers the leakeage current from transformer body to earth through earth continuity wire is almost 86 Amp but in other transformer it is (5-10)Amp. where the load current on three phase and neutral are respectively 1360Amp,1400Amp,1370 Amp & 176Amp. So please any technical person help me about the reasons of this situation and how I can rectify the fault. Moreover,I have measured the earth resistance of the Earth continuity wire which is less than 1 Ohm. Thanks Tapas Barua

3 Answers

how to calculate compresor capacity?

1 Answers

can we measure +,-.zero sequence current ....? if so how can ???

2 Answers NLC,

Which motor has high Starting Torque and Staring current DC motor, Induction motor or Synchronous motor?

5 Answers BSL, Elite, TTA,

what is the diff of mcb and mccb

2 Answers NSN, Sterling Wilson,

why alternator is used instead of dc generator and induction generator

1 Answers

Why the frequency of a system is changed if the load changes?