3 Phase Motors And Starters

Front 1

An autotransformer is a component of a static phase converter that enables adjustment of the voltages on the generated line?

Back 1

True

Front 2

What is an advantage of three phase motors compared to single phase

Back 2

They are more efficient for the same horsepower rating

Front 3

How many leads are generally found in the termination box of a 3 phase 208V motor that is only started with a full voltage across the line starter

Back 3

3 leads

Front 4

In an electronic soft starter, current limit mode

Back 4

Limits the starting current to a maximum value

Front 5

The autotransformer starter reduces the starting current twice, once because of reduced voltage and again because of transformer action?

Back 5

True

Front 6

When using an autotransformer reduced voltage starter, the starting torque of the motor decreases in direct proportion to the reduction in starting voltage?

Back 6

False

Front 7

Which 3 leads of a 12 lead motor are not present in the termination box on a nine lead motor

Back 7

T10,T11,T12

Front 8

A nine lead wye connected SCIM can be used with wye/delta starter

Back 8

False