NEMA Size Starters for Three-Phase Motors - EASA Electrical Engineering Handbook

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NEMA Size Starters for Three-Phase Motors

NEMA
Size

Maximum Horsepower - Polyphase Motors

Full-Voltage
Starting

Auto-Transformer
Starting

Part-Winding
Starting

WYE-DELTA
Starting

200V

230V

460V
575V

200V

230V

460V
575V

200V

230V

460V
575V

200V

230V

460V
575V

00
0
1
2
3
4
5
6
7
8
9

1½
3
7½
10
25
40
75
150
- -
- -
- -

1½
3
7½
15
30
50
100
200
300
450
800

2
5
10
25
50
100
200
400
600
900
1600

- -
- -
7½
10
25
40
75
150
- -
- -
- -

- -
- -
7½
15
30
50
100
200
300
450
800

- -
- -
10
25
50
100
200
400
600
900
1600

- -
- -
10
20
40
75
150
- -
- -
- -
- -

- -
- -
10
25
50
75
150
300
450
700
2600

- -
- -
15
40
75
150
350
600
900
1400
2600

- -
- -
10
20
40
60
150
300
500
750
1500

- -
- -
10
25
50
75
150
350
500
800
1500

- -
- -
15
40
75
150
300
700
1000
1500
3000


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