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Fundamental
Applicable
wave current (A)
motor (kW)
200 V
75
245
90
293
110
357
132
160
220
250
280
315
355
400
450
500
560
630
 Determining if a countermeasure is required
A countermeasure for harmonics is required if the following condition is satisfied: outgoing harmonic current > maximum value
per 1 kW contract power × contract power.
 Harmonic suppression techniques
No.
Item
Reactor (FR-HAL or FR-
1
HEL)
High power factor
2
converter (FR-HC2)
Power factor improving
3
capacitor
Transformer multi-phase
4
operation
5
Passive filter (AC filter)
6
Active filter
94
3. PRECAUTIONS FOR USE OF THE INVERTER
3.2 Power supply harmonics
Fundamental
wave current
capacity
converted from
400 V
6.6 kV (mA)
123
7455
87.2
147
8909
104
179
10848
127
216
13091
153
258
15636
183
355
21515
252
403
24424
286
450
27273
319
506
30667
359
571
34606
405
643
38970
456
723
43818
512
804
48727
570
900
54545
638
1013
61394
718
Install an AC reactor (FR-HAL) on the AC side of the inverter or a DC reactor (FR-HEL) on its DC side,
or install both to suppress outgoing harmonic currents.
This converter trims the current waveform to be a sine waveform by switching the rectifier circuit
(converter module) with transistors. Doing so suppresses the generated harmonic amount significantly.
Connect it to the DC area of an inverter. Use the high power factor converter (FR-HC2) with the
accessories that come as standard.
When used with a reactor connected in series, the power factor improving correction capacitor can
absorb harmonic currents.
Use two transformers with a phase angle difference of 30° in combinations of
provide an effect corresponding to 12 pulses, reducing low-degree harmonic currents.
A capacitor and a reactor are used together to reduce impedances at specific frequencies. Harmonic
currents are expected to be absorbed greatly by using this technique.
This filter detects the current in a circuit generating a harmonic current and generates a harmonic current
equivalent to a difference between that current and a fundamental wave current to suppress the
harmonic current at the detection point. Harmonic currents are expected to be absorbed greatly by using
this technique.
Outgoing harmonic current converted from 6.6 kV (mA) (with a DC reactor,
Rated
(kVA)
5th
7th
2237
969
626
2673
1158
748
3254
1410
911
3927
1702
1100
4691
2033
1313
6455
2797
1807
7327
3175
2052
8182
3545
2291
9200
3987
2576
10382
4499
2907
11691
5066
3274
13146
5696
3681
14618
6335
4093
16364
7091
4582
18418
7981
5157
Description
100% operation ratio)
11th
13th
17th
19th
373
350
239
445
419
285
542
510
347
655
615
419
782
735
500
1076
1011
688
1221
1148
782
1364
1282
873
1533
1441
981
1730
1627
1107
1949
1832
1247
2191
2060
1402
2436
2290
1559
2727
2564
1746
3070
2886
1965
23rd
25th
224
164
267
196
325
239
393
288
469
344
645
473
733
537
818
600
920
675
1038
761
1169
857
1315
964
1462
1072
1636
1200
1842
1351
to ∆ and ∆ to ∆, to

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