Справочник Пользователя для Mitsubishi Electronics FR-A720-0.4k to 90k

1) Calculation of equivalent capacity P0 of harmonic generating equipment

The "equivalent capacity" is the capacity of a 6-pulse converter converted from the capacity of consumer's harmonic
generating equipment and is calculated with the following equation. If the sum of equivalent capacities is higher than
the limit in Table 3, harmonics must be calculated with the following procedure:

2) Calculation of outgoing harmonic current

Outgoing harmonic current = fundamental wave current (value converted from received power voltage) 

× operation

ratio 

× harmonic content

⋅Operation ratio: Operation ratio = actual load factor × operation time ratio during 30 minutes
⋅Harmonic content: Found in Table 4.

P0 = 

Σ (Ki × Pi) [kVA]

* Rated capacity: Determined by the capacity of the applied motor and

found in Table 5. It should be noted that the rated capacity used here
is used to calculate generated harmonic amount and is different from
the power supply capacity required for actual inverter drive.

Ki: Conversion factor(According to Table 2)
Pi: Rated capacity of harmonic generating equipment

*

 [kVA]

i : Number indicating the conversion circuit type

0.4

1.61

0.81

49

0.57

31.85

20.09

4.165

3.773

2.107

1.519

1.274

0.882

0.75

2.74

1.37

83

0.97

53.95

34.03

7.055

6.391

3.569

2.573

2.158

1.494

1.5

5.5

2.75

167

1.95

108.6

68.47

14.20

12.86

7.181

5.177

4.342

3.006

2.2

7.93

3.96

240

2.81

156.0

98.40

20.40

18.48

10.32

7.440

6.240

4.320

3.7

13.0

6.50

394

4.61

257.1

161.5

33.49

30.34

16.94

12.21

10.24

7.092

5.5

19.1

9.55

579

6.77

376.1

237.4

49.22

44.58

24.90

17.95

15.05

10.42

7.5

25.6

12.8

776

9.07

504.4

318.2

65.96

59.75

33.37

24.06

20.18

13.97

11

36.9

18.5

1121

13.1

728.7

459.6

95.29

86.32

48.20

34.75

29.15

20.18

15

49.8

24.9

1509

17.6

980.9

618.7

128.3

116.2

64.89

46.78

39.24

27.16

18.5

61.4

30.7

1860

21.8

1209

762.6

158.1

143.2

79.98

57.66

48.36

33.48

22

73.1

36.6

2220

25.9

1443

910.2

188.7

170.9

95.46

68.82

57.72

39.96

30

98.0

49.0

2970

34.7

1931

1218

252.5

228.7

127.7

92.07

77.22

53.46

37

121

60.4

3660

42.8

2379

1501

311.1

281.8

157.4

113.5

95.16

65.88

45

147

73.5

4450

52.1

2893

1825

378.3

342.7

191.4

138.0

115.7

80.10

55

180

89.9

5450

63.7

3543

2235

463.3

419.7

234.4

169.0

141.7

98.10

75

245

123

7455

87.2

2237

969

626

373

350

239

224

164

90

293

147

8909

104

2673

1158

748

445

419

285

267

196

110

357

179

10848

127

3254

1410

911

542

510

347

325

239

132

—

216

13091

153

3927

1702

1100

655

615

419

393

288

160

—

258

15636

183

4691

2033

1313

782

735

500

469

344

220

—

355

21515

252

6455

2797

1807

1076

1011

688

645

473

250

—

403

24424

286

7327

3175

2052

1221

1148

782

733

537

280

—

450

27273

319

8182

3545

2291

1364

1282

873

818

600

315

—

506

30667

359

9200

3987

2576

1533

1441

981

920

675

355

—

571

34606

405

10382

4499

2907

1730

1627

1107

1038

761

400

—

643

38970

456

11691

5066

3274

1949

1832

1247

1169

857

450

—

723

43818

512

13146

5696

3681

2191

2060

1402

1315

964

500

—

804

48727

570

14618

6335

4093

2436

2290

1559

1462

1072