C

Question 1

Delta low voltage connection is connected in?

Answer 1

Parallel.

3 groups of 3 leads

9 leads at JB. T1-T9

3 leads are internal

Question 2

What voltage is for low voltage and what voltage is for high voltage

Answer 2

Low = 230v

High - 460v

Question 3

Wye low voltage is connected in?

Answer 3

Parallel

3 groups of 2 leads

1 group of 3 leads

Question 4

Both delta and wye high voltage are connected in?

Answer 4

Series

Question 5

Motor starters can be either?

Answer 5

Across the line starters or
Reduce full voltage starters

Question 6

Full voltage starters typically produce a starting current that is?

Answer 6

500% - 600% of full load current and

Starting torque that is 150% of full load torque

Question 7

Across the line starters can be?

Answer 7

Manual or magnetic starter design

Question 8

Manual motor starters use a?

Answer 8

Manual open close switch

Question 9

Magnetic starter uses?

Answer 9

Electrically operated switch

Question 10

What are these symbols?

Answer 10

TDOE - time delay on energization

Question 11

What are these symbols

Answer 11

TDOD
Timed delay on de energization

Question 12

What kind of taps can an auto transformer have?

Answer 12

80, 65, or 50% taps

Question 13

The starting currents % to the starter are?

Answer 13

64, 42 and 25% of full voltage starting current

Question 14

Auto transformer starters can be?

Answer 14

Open or closed transition starters

Question 15

Wye delta starting requires a Delta motor that has ____ terminal leads?

Answer 15

6. T1- t6

Connected in wye for starting and reconnected in delta for running

Question 16

When a motor is connected in wye to start, the in rush current and torque can be reduced to?

Answer 16

33 1/3%

Question 17

For an open transition wye delta start the overload settings are based on?

Answer 17

57.7% of full load current

Question 18

Which starter can be used as a disconnecting means by the CEC?

Answer 18

Manual

Question 19

A six lead motor has T1 T2 T3 T7 T8 and T9. what type of motor is it?

Answer 19

Wye

Question 20

How many conductors must be run between a part winding motor and starter?

Answer 20

6

Question 21

The line starting current of an auto transformer starter is?

Answer 21

Less than the motor starting current

Question 22

What is the main intent of using reduced voltage starters

Answer 22

Reduces in rush starting current

Question 23

What is meant by current limit starting when provided by a soft starter?

Answer 23

Current limit starting restricts the starting current to a max value

Question 24

What’s the best choice of starter if you required the gradual acceleration of a constant torque load?

Answer 24

Soft starter

Question 25

Is 3 phase power always available?

Answer 25

No

Question 26

Phase converters have several applications in industries that have a single phase service including?

Answer 26

Farms Small industrial plants Woodworking shops Metal fabrication shops

Question 27

Which motor is more complicated?

Answer 27

Single phase motors

Question 28

Single phase motor attributes are?

Answer 28

Have more parts Are noisier Are larger Require more maintenance

Question 29

3 phase motor attributes are?

Answer 29

Less expensive More readibly available Smaller Quieter

Question 30

What is a phase converter?

Answer 30

Controllers that allow one or more 3 phase motors to run on Single phase system

Question 31

What are 2 types of phase converters?

Answer 31

Rotary and static phase converter

Question 32

Which phase converter produces better output?

Answer 32

Rotary because it uses the a motor generator

Question 33

What is the main component of a rotary phase converter?

Answer 33

Induction motor generator

Question 34

What are two power ratings of a rotary phase converter?

Answer 34

Max hp run, max hp start

Question 35

If more than one phase converter motor is started which one should be stated first?

Answer 35

The largest

Question 36

What type of capacitor does a phase converter need for starting?

Answer 36

Electrolytic

Question 37

What type of capacitor does a phase converter need for running?

Answer 37

Film or pull filled

Question 38

What does an auto transformer do?

Answer 38

Adjusts the voltages to the 3rd line using taps?

Question 39

Which line of a phase converter has consists current regardless of the load?

Answer 39

L3

Question 40

Part winding starter has ___ leads?

Answer 40

Six

Question 41

Soft starters have two acceleration modes. What are they?

Answer 41

Ramp starting Current limit starting

Question 42

Single phase motors are not available above ___ hp?

Answer 42

15

Question 43

Single phase motors are not common above ___ hp?

Answer 43

5

Question 44

A _____motor starter is the best choice for motor control?

Answer 44

Magnetic

Question 45

A small machine shop installed a 3 phase exhaust fan. What type of phase converter should be used?

Answer 45

Static

Question 46

On a farm or wood shop what is the best phase converter to use?

Answer 46

Rotary