what is the procedure for three phase motor differential
relay testing
can it do with single phase test kit?
Answer / santosh kawade
Three phase motor differential relay testing can be done
with single phase test kit.
There are two type of relay testings:
1) Primary injection : In this testing entire system
(including relay, control wiring and power wiring get
checked),
2) Secondary injection : In this testing generally we check
relay only.
By using single phase test kit:
1) Primary injection :
a) Carryout shorting of all three phases of motor winding
by using short link for individual phases seperately.
b) Inject current by using current injection device (for
inzone and outzone fault)
3) Check stability of relay for outzone fault and operation
of relay for inzone fault.
2) Secondary injection :
Directly inject fault current in relay terminal and check
proper operation of relay.
Santosh Kawade
9224 69 3116
Is This Answer Correct ? | 6 Yes | 2 No |
what is meant by vector group in transformers? wy we r using that?
what is arc flash and what are the hazards involved
if neutral earthing is weak of a system then how can we improve it ? Technically explanation ??
WHERE IS THE LIGHTING ARRESTER SHOULD BE PLACED IN DISTRIBUTION LINES?
How many methods use the load flow solution?
can anybody tell me that for p.f. Improvment we use capacitor banks but how to decide its capacitance. As we all know how to calculate kvar but what abt capacitance value
what is a relay?
The insulation resistance of a cable can be measured by
what is the purpose for open delta connection in potential transformer
How I can Compare 120v/60Hz versus 220v/50Hz ? Please tell me both advantage and disadvantage ......
what is tha online tapping and offline tappchange? which side connected primary or secondary and explain ?
how an electron flow in a wire. can it flow like a car running on the road?