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Pre-operation instructions
(c)Deciding whether to take harmonic suppression measures
When the outgoing harmonic current > the maximum value per 1kW contract contract kW, a harmonic suppression
measures are required.
(d) Harmonic suppression measures
Table 5 Rated Capacity and Outgoing Harmonic Current during Inverter Run
Applied
Motor
(kW)
Rated Current
[A]
Fundamental
Wave Current
Converted from
6.6kV (mA)
Rated
Capacity
(kVA)
Harmonic Current Converted from 6.6kV (mA)
(No reactor, 100% operation ratio)
200V 400V 5th 7th 11th 13th 17th 19th 23rd 25th
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 5.50 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
Applied
Motor
(kW)
Rated Current
[A]
Fundamental
Wave Current
Converted from
6.6kV (mA)
Rated
Capacity
(kVA)
Harmonic Current Converted from 6.6kV (mA)
(With a DC reactor, 100% operation ratio)
200V 400V 5th 7th 11th 13th 17th 19th 23rd 25th
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
560 900 54545 638 16364 7091 4582 2727 2564 1746 1636 1200
No. Item Description
1
Reactor
(FR-HAL, FR-HEL)
Harmonic current is suppressed by installing an AC reactor (FR-HAL) in the AC input side of the inverter
or a DC reactor (FR-HEL) in the DC bus line of the inverter, or by installing both.
2
High power factor
converter
(FR-HC2)
FR-HC2 is designed to switch ON/OFF the converter circuit to convert an input current waveform into a
sine wave, suppressing the harmonic current considerably. The converter (FR-HC2) is used with the
standard-equipped peripheral devices and accessories.
3
Power
factor improving static
capacitor
Using the power factor improving static capacitor with a series reactor has an effect of absorbing
harmonic currents.
4
Multi-phase operation
with transformers
Using two transformers with a phase angle difference of 30 as in - and -
combinations
provides an effect corresponding to 12 pulses and reduces low-degree harmonic currents.
5
Passive filter
(AC filter)
A capacitor and a reactor are used together to reduce impedance at specific frequencies, producing a
great effect of absorbing harmonic currents.
6 Active filter
This filter detects the current of the circuit, where harmonic current is generated, and generates the
harmonic current equivalent to the difference between that current and a fundamental wave current.
By doing so, the harmonic current at where it was detected can be suppressed, and great absorption of
harmonic current can be expected.
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