Installation Of A Reactor; Harmonic Suppression Techniques - Mitsubishi Electric FR-F800 Instruction Manual

Installation of a reactor

Rated
Applicable current (A)
motor
(kW)
200 V 400 V
75 245 123
90 293 147
110 357 179
132 - 216
160 - 258
220 - 355
250 - 403
280 - 450
315 - 506
355 - 571
400 - 643
450 - 723
500 - 804
560 - 900
630 - 1013
• 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 installation
1
(FR-HAL, FR-HEL)
High power factor
2
converter (FR-HC2)
Installation of power
3 factor improving
capacitor
Transformer multi-phase
4
operation
Passive filter
5
(AC filter)
6 Active filter
3.3
Installation of a reactor
When the inverter is connected near a large-capacity power transformer (1000 kVA or more) or when a power factor
correction capacitor is to be switched over, an excessive peak current may flow in the power input circuit, damaging the
converter circuit. To prevent this, always install an AC reactor (FR-HAL), which is available as an option.
MCCB
Power
supply
80
PRECAUTIONS FOR USE OF THE INVERTER
Fundamental
wave current Rated
converted capacity
from 6.6 kV (kVA)
(mA)
7455 87.2
8909 104
10848 127
13091 153
15636 183
21515 252
24424 286
27273 319
30667 359
34606 405
38970 456
43818 512
48727 570
54545 638
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˚ as in
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.
AC reactor
Inverter
(FR-HAL)
MC
X
R
R/L1
S Y
S/L2
Z
T
T/L3
Outgoing harmonic current converted from 6.6 kV (mA)
(With a DC reactor, 100% operation ratio)
5th 7th 11th
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
(kVA)
5300
5000
4000
U
3000
M
V
2000
1000
W
13th 17th 19th
373 350 239 224
445 419 285 267
542 510 347 325
655 615 419 393
782 735 500 469
1076 1011 688 645
1221 1148 782 733
1364 1282 873 818
1533 1441 981 920
1730 1627 1107 1038
1949 1832 1247 1169
2191 2060 1402 1315
2436 2290 1559 1462
2727 2564 1746 1636
3070 2886 1965 1842
-∆ and ∆-∆ combinations to provide an
Capacities requiring
installation of
AC reactor
110165 247 330 420 550 kVA
Inverter capacity
23rd 25th
164
196
239
288
344
473
537
600
675
761
857
964
1072
1200
1351