370. An AC winch hoist controller such as shown in the illustration has welded contacts on the hoist contactor, and the contacts must be replaced. Before replacing the contacts, the cause for the welding of the contacts must be determined. Which of the following statements describes the possible causes

Question

Accepted Answer

the welding of contacts may be caused by low applied voltage to the operating coil (less than 85% of rated voltage) or by weak springs.

Comments (0)

Trial period expired