Amp chart - Cummins

[Pages:1]Amp chart

Electrical formulas for computing alternator amperage:

Desired data Kilovolt-Amps (kVA)

Kilowatts (kW)

AMPS - When kW are known

AMPS - When kVA is known AMPS - When Horsepower is known Electric Motor Horsepower Output (HP)

Single-phase Volts x Amps

1,000

kVA x Power Factor (PF)

kW x 1,000 Volts x PF kVA x 1,000

Volts HP x 746 Volts x % Eff. x PF Volts x Amps x % Eff. x PF

746

Three-phase Volts x Amps x 1.732

1,000

kVA x Power Factor (PF)

kW x 1,000 1.732 x Volts x PF

kVA x 1,000 1.732 x Volts

HP x 746 1.732 x Volts x % Eff. x PF Volts x Amps x 1.732 x % Eff. x PF

746

Direct current

Volts x Amps 1,000

kW x 1,000 Volts

HP x 746 Volts x % Eff. Volts x Amps x % Eff.

746

Generator rating:

kVA

kW

120

@0.8 PF Volts

208 Volts

220 Volts

240 Volts

Alternator amperes (for 3-phase alternators):

18.7

15

90

52

49

45

25

20

120

69

66

60

31.3

25

151

87

82

75

37.5

30

170

104

99

90

50

40

240

139

131

120

62.5

50

301

173

164

151

75

60

361

208

197

181

93.8

75

452

261

246

226

100

80

482

278

263

241

125

100

602

347

328

301

156

125

751

433

410

376

187

150

901

520

491

450

219

175 1055 609

575

527

250

200 1204 695

657

602

312

250 1503 867

820

751

375

300 1806 1042 985

903

438

350 2110 1217 1151 1055

500

400 2408 1389 1314 1204

625

500 3010 1737 1642 1505

750

600 3612 2084 1970 1806

875

700 4215 2431 2299 2107

1000 800 4817 2779 2627 2408

1125 900 5419 3126 2956 2709

1250 1000 6021 3474 3284 3010

1563 1250 7527 4343 4106 3764

1875 1500 9031

-

-

4516

2188 1750 10539

-

-

-

2500 2000 12042

-

-

-

440 Volts

25 33 41 49 66 82 99 123 131 164 205 246 288 328 410 493 575 657 821 985 1149 1314 1478 1642 2053 2463 2874 3284

480 Volts

23 30 38 45 60 75 90 113 120 151 188 225 264 301 376 452 527 602 753 903 1054 1204 1355 1505 1881 2258 2635 3010

600 Volts

18 24 8 36 48 60 72 90 96 120 150 180 211 241 300 361 422 482 602 722 843 963 1084 1204 1506 1806 1806 2408

2400 Volts

6 5 9 12 15 18 23 24 30 38 45 53 60 75 90 105 120 150 181 211 241 271 301 376 452 452 602

3300 Volts

4 4 7 9 11 13 16 17 22 27 33 38 44 55 66 77 86 109 131 153 175 197 219 274 328 383 438

4160 Volts

3 2 5 7 9 10 13 14 17 22 26 30 35 43 52 61 69 87 104 122 139 156 174 217 260 304 347

6900 11,500 13,800 Volts Volts Volts

-

-

-

-

-

-

1.5

1

-

3

2

1.5

4

2.5

2

5

3

2.5

6

4

3

8

5

4

8

5

4

10

6

5

13

8

6

16

9

8

18

11

8

21

13

10

26

16

13

31

19

16

37

22

18

42

25

21

52

31

26

63

38

31

73

44

37

84

50

42

94

57

47

105

63

52

131

79

65

157

94

78

183

110

92

209

126

105

Actual measurements may vary depending upon the application and load size.

? 2007 Cummins Power Generation F-1610



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