Exam 21: Interlocking Methods for Reversing Control

A mechanical interlocking device is assembled at the factory ________the forward and reverse contactors.

The term interlocking is used generally when referring to motor controllers and control stations that are ____________to provide control of production operations.

Reversing starters are available in ___________construction.

If magnetic control devices are to be used, then reversing_________ accomplish the reversal of the motor direction.

Electrical interlocks are usually mounted on the side of a motor starter.

NEMA specifications call for a starter to be derated.

The direction of rotation of three-phase motors can be reversed by interchanging any two-motor leads to the line.

Push-button interlocking is an electrical method of preventing both starter coils from being de-energized simultaneously.

To reverse the direction of rotation of single-phase motors, both the starting and running winding motor leads are interchanged.

Reversing starters consisting of mechanical and electrical interlocked devices are preferred for________ .