Exam 18: Three-Wire and Separate Controls

A three-wire control circuit uses momentary contact, start-stop stations, and a holding circuit interlock connected __________with the start button to maintain the circuit.

Sirens, horns, and loud buzzers may be used in production systems to call attention to malfunctions.

It is sometimes desirable to operate push buttons or other control devices at some voltage higher than the motor voltage.

It is necessary to restart a motor after it has been stopped by a three-wire control circuit with__________ protection.

No-voltage protection protects __________.

When configuring separate control wiring, the maintenance technician must ensure that the proper connections are made.

Pilot lights are tested frequently to ensure operation.

What is the first action when the start button of a three-wire control circuit is pushed?

In a three-wire control circuit, when the supply voltage returns after a failure, the circuit is re-energized.

The operation of the overload protection_________ the control circuit.