Is it possible to use AC supply insted of DC supply in trip coil operation? if

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Is it possible to use AC supply insted of DC supply in trip
coil operation? if not, why?

Question Posted / sreenu

5 Answers
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Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?..

Answer / k.prakashchandra

The plunger will not act with AC supply

Is This Answer Correct ?

3 Yes

1 No

Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?..

Answer / linish

Trip circuit should be powered from a class 1
supply since it is responsible for
total protection of the system,so most reliable
source will be battery that is DC

Is This Answer Correct ?

4 Yes

2 No

Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?..

Answer / vvvv

a trip coil is expected to work with high speed reliably so
as to produce effective jurk.
AC supply can also be used for trip coil subject to proper
design. however after comparison for same rating coils, it
will be clear that DC Trip coils exhibit the required
performance as compared to AC

Is This Answer Correct ?

2 Yes

0 No

Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?..

Answer / thanigai1984

We cant store the AC supply... we store only DC supply ...when abnormal condition AC supply will Trip on that time we used as DC supply .. that why they use DC coils for Trip and Close..

Is This Answer Correct ?

3 Yes

2 No

Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?..

Answer / vijay balu raskar

Main reason is property of Inductance.

Is This Answer Correct ?

1 Yes

0 No

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For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.

3 Answers

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