Deck 27: Part Winding Starters

Question 1

One advantage of part winding starters is that they provide ____________________ starting because the motor is never disconnected from the power line during the starting time.

Answer 1

closed transition

Question 2

Figure 27-2

In the accompanying figure, why are both overload relays connected in series?

Answer 2

Both overload relays are connected in series so that an overload on either relay will disconnect both motor windings.

Question 3

What happens if the second winding is not connected to the power line within a short period of time?

Answer 3

The first winding can be severely damaged.

Question 4

The thermal capacity of the stator windings greatly limits the length of starting time for a part winding motor. How do you overcome this problem?

Question 5

Each winding in motors designed for part winding starting is individually protected by ____________________ overload heaters.

Question 6

Delta connected dual voltage motors are acceptable for part winding starting.

Question 7

The thermal capacity of the stator windings greatly limits the length of starting time for a part winding motor. How can you help overcome this problem?

Question 8

When dual voltage motors are used, the motor must be operated on the high voltage setting of the motor.

Question 9

The method of starting in which only half the motor winding is used during starting is called ____________________ starting.

Question 10

With part winding starting, the first winding will ____________________ rapidly if the second windings is not connected within a very short period of time.

Question 11

Part winding starters provide closed transition starting.

Question 12

To help prevent damaging the first winding, some circuits contain a timer that disconnects power to the motor if the second winding is not energized within a predetermined time. This timer is often called a(n) ____________________.

Question 13

Motors designed to be used for part winding starting contain two separate stator windings. What are they?

Question 14

Part winding starting is typically used for motors that supply the moving force for centrifugal pumps, fans, and blowers.

Question 15

In part winding starting, neither of the two windings is individually capable of withstanding the starting current for more than a few seconds.