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FAN TRIP UNIT
DESCRIPTION:

THE PURPOSE OF THIS UNIT IS TO TRIP THE 525VAC BREAKER BY USING AN INDUCED EARTH FAULT. THE UNIT WILL INDUCE CURRENT IN MILI-AMPS TO GROUND (EARTH) FROM ONE OF THE PHASES. THE UNIT IS AVAILABLE IN 175mA , 375mA AND 500mA 250mA.

OPERATION

THE UNIT IS CONNECTED TO THE OUTGOING OF THE 525VAC BREAKER, (PHASE). WHEN THE POTENTIAL FREE CONTACT ON THE FAN CONTACTOR IS CLOSED DUE TO A FAN TRIP CONDITION, THE UNIT WILL INDUCE A MILI-AMP EARTH FAULT FROM ONE OF THE PHASES TO EARTH. THIS WILL THEN TRIP THE BREAKER. SHOULD THE BREAKER NOT TRIP, THE UNIT INDUCES THE MILI-AMP EARTH FAULT FOR A PERIOD OF 5 SECONDS, THEREAFTER A L.E.D. ON THE UNIT WILL ILLUMINATE, INDICATING A EARTH LEAKAGE OR A EARTH FAULT.