AQ18 Reversing Motor Control

A reversing magnetic motor starter provides a magnetic method of changing a motor's direction of rotation. (T/F)

True

Mechanical interlocking should be used in combination with one of the electrical methods so that the blocked coil cannot be energized. (T/F)

True

A Hand-Off-Automatic (H-O-A) circuit requires a selector switch with __________ positions.

3

One application of interlocking is to cause both the forward and reverse coils of a reversing contactor to be energized at the same time. (T/F)

False

Which of the following is a component of a reversing magnetic motor starter?

Forward contactor Reverse contactor Overload Protection All of the above

Based on the wiring diagram shown, which of the following statements is true of a drum switch if the switch is placed in the reverse position?

L1 is connected to T2, L2 is connected to T1, and L3 is connected to T3

Based on the circuit diagram shown, what will happen to the motor if the JOG pushbutton is pressed?

The motor will run until the JOG button is released.

You can reverse the rotation of any three-phase motor by interchanging any two of the three power supply lines.

True

A __________ is often used to allow an operator or technician to change a machine from the automatic mode to the manual mode.

Selector switch