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DannyD
Associate

Join Date: Oct 2009
Location: kuruman NC. SOUTH AFRICA
Posts: 51
Good Answers: 1

Tripping Coil

12/06/2010 5:09 AM

Hi gud people

what is the minimum voltage that can trip the 380V tripping coil on the circuit breaker? i have 380V 4 wire system, the main circuit breaker is 350A equipt with 1000mA earth leakage relay with a core balance.

the voltage stated on the tripping coil is 380V, the voltage from the core balance(unbalance) is 72V, and this trip the main breaker. I know there is earth fault on my circuit. but why 380V coil trip on 72V.

REGARD,

DAN

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 Dan Segami
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onlymeher
Active Contributor

Join Date: Nov 2009
Posts: 12
#1

Re: TRIPPING COIL

12/06/2010 5:40 AM

dear friend,

please check the control circuit. the tripping coil must be supplied with a operating control voltage of 380V +/- 10% through the earthfault relay's tripping contact. the cbct must have connected to the earthfault relay instead of tripping coil.

thanks.
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DannyD
Associate

Join Date: Oct 2009
Location: kuruman NC. SOUTH AFRICA
Posts: 51
Good Answers: 1
#2

Re: TRIPPING COIL

12/06/2010 5:52 AM

SORRY GUYS, WRONG INFO.

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 Dan Segami
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