Over-load coil performs the function when __________(a) In the case of failure of field current(b) If the resistance is very high(c) If armature current increases beyond certain value(d) At the start of each rotationThis question was addressed to me in quiz.I'm obligated to ask this question of Starting of DC Motors topic in portion DC Motors of DC Machines

Over-load coil performs the function when __________(a) In the case of

1.	Over-load coil performs the function when __________(a) In the case of failure of field current(b) If the resistance is very high(c) If armature current increases beyond certain value(d) At the start of each rotationThis question was addressed to me in quiz.I'm obligated to ask this question of Starting of DC Motors topic in portion DC Motors of DC Machines
Answer» Right choice is (C) If armature current increases beyond certain value The best explanation: The contact of this relay at armature current above a certain value (over load/ short circuit) closes the NVC ends, again bringing the HANDLE to OFF POSITION. NVC and OL release are protections incorporated in 3-point STARTER.

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