A Generator is in running condition and Rotor earth fault
alarm is coming.How to check on line(i.e in running
condition) whether there is actual earth fault in rotor or
not.
Answers were Sorted based on User's Feedback
Answer / kk
Rotor earth relay have 2
stage. One 4 alarm & other 4
trip. One can check the
bridge o/p voltage(mV) &
compare with comissioning
time value.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / bhuvnesh kumawat
rotor earth fault alarm comes only if our carbon brushes
become earthed. it may be at the time of changing carbon
brushes.
Is This Answer Correct ? | 1 Yes | 3 No |
Answer / sujeet kumar
we have to check the status of zero sequence relay..
if its not affected then there is not any earth fault
Is This Answer Correct ? | 0 Yes | 5 No |
Answer / alok
rotor both side earth fault wire open and check countinuti
with the help of multimeter at rotor both end.but one side
wire who is grounded must be grounded.
Is This Answer Correct ? | 2 Yes | 8 No |
What is Single Phasing fault???(not single-phase fault)
Why earthing is required for diesel tank?
How to calculate energy stored in a capacitance
what you mean by vector group of a 3 ph transformer
What are the advantages and disadvantages of the dc motors?
If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.
why current transformer secondary is short circuited an what will happen if connect very high resistance acrossthe secondary side of current transformer?
how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?
what is the difference between PLC and embedded system
how does the power is travelled in conductor
I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase, before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???
what will be the efficiency off x'mer during no load test and during short circuit test
1 Answers GPSC Gujarat Public Service Commission,