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| FAN TRIP UNIT |
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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.
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