As shown in the illustration, simultaneously pulling in of both the forward and reverse contactors is preventing by both mechanical and electrical means. What statement is true concerning the two means of electrical interlocking used? See illustration EL-0139.

Question

Accepted Answer

the normally closed "R" and "F" auxiliary contacts are instantaneous interlocks, requiring stopping in one direction before starting in another direction, whereas the normally closed, time closed "RCR" and "FCR" contacts require a time-delay associated with coast down after shutting down in one direction before allowing starting in the opposite direction

Answer

the normally closed "R" and "F" auxiliary contacts and the normally closed, time closed "RCR" and "FCR" contacts are all instantaneous interlocks, requiring stopping in one direction before starting in another direction

Answer

the normally closed, timed closed "RCR" and "FCR" auxiliary contacts are instantaneous interlocks, requiring stopping in one direction before starting in another direction, whereas the normally closed "R" and "F" contacts require a time-delay associated with coast down after shutting down in one direction before allowing starting in the opposite direction

Answer

the normally closed "R" and "F" auxiliary contacts and the normally closed, time closed "RCR" and "FCR" contacts all require a time-delay associated with coast down after shutting down in one direction before allowing starting in the opposite direction

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