Cutler Hammer, Div of Eaton Corp Definite Purpose Contactors, Definite Purpose Starters Technical Specifications

May 2007

Deﬁnite Purpose Contactors & Starters Technical Data and Speciﬁcations

Ampere Rating of AC Motors

Ampere ratings of motors vary somewhat, depending upon the type of motor. The values given below are for drip-proof, Class B insulated (T Frame) where available, 1.15 service factor, NEMA Design B motors. These values represent an average full load motor current which was calculated from the motor performance data published by several motor manufacturers. In the case of high torque squirrel cage motors, the ampere ratings will be at least 10% greater than the values given below.

Ampere Ratings of Three-Phase, 60 Hz, AC Induction Motor



1/4 1800

1/3 1800

1/2 1800

3/4 1800

1 3600

1-1/2 3600

2 3600

3 3600

5 3600

7-1/2 3600

10 3600

15 3600

20 3600

Syn. Speed RPM

1200

900

1200

900

1200

900

1200

900

1800 1200

900

1800 1200

900

1800 1200

900

1800 1200

900

1800 1200

900

1800 1200

900

1800 1200

900

1800 1200

900

1800 1200

900

Current in Amperes

200V 230V 380V

1.09

1.61

1.84

1.37

1.83

2.07

1.98

2.47

2.74

2.83

3.36

3.75

3.22

4.09

4.32

4.95

5.01

5.59

6.07

6.44

7.36

7.87

9.09

9.59

10.8

11.7

13.1

15.5

16.6

18.2

18.3

22.4

24.7

25.1

26.5

29.2

30.8

32.2

35.1

41.9

45.1

47.6

51.2

58.0

58.9

60.7

63.1

1.40

1.60

1.19

1.59

1.80

1.72

2.15

2.38

2.46

2.92

3.26

2.80

3.56

3.76

4.30

4.36

4.86

5.28

5.60

6.40

6.84

7.90

8.34

9.40

10.2

11.4

13.5

14.4

15.8

15.9

19.5

21.5

21.8

23.0

25.4

26.8

28.0

30.5

36.4

39.2

41.4

44.5

50.4

51.2

52.8

54.9

.95

1.04

1.24

1.38

1.42

1.69

1.88

1.70

2.06

2.28

2.60

2.64

2.94

3.20

3.39

3.87

4.14

4.77

5.02

5.70

6.20

6.90

8.20

8.74

9.59

9.60

11.8

13.0

13.2

13.9

15.4

16.3

16.9

18.5

22.0

23.7

25.0

26.9

30.5

31.0

31.9

33.2

.55 .81 .93

.69 .92

.99



460V 575V 2200V

.48 .70 .80

.60 .80 .90

.86

1.08

1.19

1.23

1.46

1.63

1.40

1.78

1.88

2.15

2.18

2.43

2.64

2.80

3.20

3.42

3.95

4.17

4.70

5.12

5.70

6.76

7.21

7.91

7.92

9.79

10.7

10.9

11.5

12.7

13.4

14.0

15.2

18.2

19.6

20.7

22.2

25.2

25.6

26.4

27.4

.38 .56 .64

.48 .64 .72

.69 .86 .95

.98

1.17

1.30

1.12

1.42

1.50

1.72

1.74

1.94

2.11

2.24

2.56

2.74

3.16

3.34

3.76

4.10

4.55

5.41

5.78

6.32

6.33

7.81

8.55

8.70

9.19

10.1

10.7

11.2

12.2

14.5

15.7

16.5

17.8

20.1

20.5

21.1

21.9

— — —

— — — —

Caution — These average ratings could be high or low for a speciﬁc motor and therefore heater coil selection on this basis always involves risk. For fully reliable motor protection, select heater coils on the basis of full load current rating as shown on the motor nameplate.

hp Syn.

25 3600

30 3600

40 3600

50 3600

60 3600

75 3600

100 3600

125 3600

150 3600

200 3600

250 3600

300 1800

400 1800 — 896 518 448 358 91.8

500 1800 — 1110 642 555 444 116





Speed RPM

1800 1200

1200——

To convert horsepower to kW, multiply horsepower by .7457. 380V 50 Hz.

Current in Amperes

200V 230V 380V

69.9

74.5

111 116 117 121

138 143 145 150

164 171 173 177

206 210 212 222

266 271 275 290

— — — —

75.4

77.4

84.8

86.9

90.6

94.1

900

101 102 105

120 124 126 130

143 140 150 154

179 183 184 193

231 236 239 252

292 293 298 305

343 348 350 365

452 458 460 482

559 568 573 600

678 684

60.8

64.8

65.6

67.3

73.7

75.6

78.8

81.8

96.4

108 111 112 117

140 144 145 153

176 177 180 186

208 210 210 211

257 265 266 279

338 343 345 347

392 395



460V 575V 2200V

36.8

39.2

39.6

40.7

44.4

45.7

47.6

49.5

58.2

61.0

61.2

63.2

72.9

75.2

76.2

78.5

86.8

90.0

91.0

93.1

115 118 120 126

146 147 149 153

171 174 174 183

226 229 230 241

279 284 287 300

339 342

30.4

32.4

32.8

33.7

36.8

37.8

39.4

40.9

48.2

50.4

50.6

52.2

60.1

62.2

63.0

65.0

71.7

74.5

75.0

77.0

89.6

91.6

92.0

96.5

101

116 117 119 122

137 139 139 146

181 184 184 193

223 227 229 240

271 274

24.3

25.9

26.2

27.0

29.4

30.2

31.5

32.7

38.5

40.3

40.4

41.7

48.2

49.7

50.4

52.0

57.3

59.4

60.0

61.5

71.7

73.2

73.5

77.5

92.2

94.8

95.6

— — — —

—

23.6

24.2

24.8

29.2

29.9

30.9

34.8

35.5

37.0

46.7

47.0

49.4

57.5

58.5

60.5

69.0

70.0

CA03502001E For more information visit: www.eaton.com

Cutler Hammer, Div of Eaton Corp Definite Purpose Contactors, Definite Purpose Starters Technical Specifications

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