Motor Controls Unit 2

A motor nameplate reads 230/460 Volt, 1.5/0.7 A. When connected in series to a 460 V supply, how much current will a fully-loaded motor draw?

0.7 A

According to NEMA standards, what size of starter would be used with a 6 hp, three-phase motor at 230 Volt?

1

What is a NEMA frame 56 motor shaft diameter?

5/8 inch (1.59 cm)

What is the meaning of a diamond-shaped symbol?

A solid state device.

What utilization category is used for a contactor frequently making and breaking locked rotor current of a three-phase, squirrel-cage motor?

AC-3

What term is a synonym for wiring diagrams?

Connection Diagrams.

What do narrower lines means in diagrams?

Control Lines.

What letter or combination of letters is used with graphic symbols to specify the function of a device?

Designation.

What is the name of the ratio of mechanical power produced to the electrical power input required by the motor?

Efficiency

Which diagram represents the circuit as it appears physically?

Wiring Diagram