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? Illustration EL-0102

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.

Answer

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

Answer

The welding of contacts may be caused by excessively applied voltage to the operating coil (more than 110% of rated voltage) or by excessively strong springs.

Answer

The welding of contacts may be caused by excessively applied voltage to the operating coil (more than 110% of rated voltage) or by weak springs.