During the operation of the drive technology, which uses semiconductor elements, parasitic high-frequency harmonics are produced, which have a negative impact on the power supply network, as a result of which the shape of the sinusoidal voltage is distorted. The electromagnetic interference that occurs in this case negatively affects the operation of other machines and equipment, unforeseen failures and stops occur, products are damaged, and the continuity of the technological process is disrupted.
In addition, high-frequency distortions are the causes of power losses in all electric machines and devices powered from the mains.
To limit the propagation of high-frequency harmonics at the input of electric drives and thyristor modules, it is recommended to use network chokes and reactors.
The installation of inductive elements also allows to extinguish switching overvoltages, in case of a short circuit, the value of the steady-state short-circuit current and its rate of increase are reduced. Network reactors protect low-power electronic devices from the effects created by welding equipment, thyristor regulators, DC drives.
Chokes and reactors in drive technology act as a two-way buffer between the electric drive and the power supply network, reducing harmful mutual effects.
When carrying out repair and modernization projects, our engineers actively use network chokes and reactors in the power supply circuits of Leroy Somer electric drives, Control Techniques series Mentor MP, Unidrive SP, Digidrive SK, Commander SK, Unidrive M700, Unidrive M400, Powerdrive MD2.
Technical characteristics of network chokes at mains voltage Uin=3~220-480 V 50Hz
type of throttle | In, And | L, MGN | N, Tue |
5,5ST4,2 | 5,5 | 4,2 | 36 |
11ST 2,6 | 11 | 2,6 | 37 |
21ST1,4 | 21 | 1,4 | 66 |
29ST1 | 29 | 1 | 69 |
46ST0,64 | 46 | 0,64 | 99 |
75ST0,39 | 75 | 0,39 | 135 |
105ST0,23 | 105 | 0,23 | 170 |
150ST0,155 | 150 | 0,155 | 190 |
185ST0,13 | 185 | 0,13 | 200 |
220ST0,11 | 220 | 0,11 | 230 |
245ST0,095 | 245 | 0,095 | 245 |
292ST0,08 | 292 | 0,08 | 280 |
360ST0,065 | 360 | 0,065 | 310 |
460ST0,05 | 460 | 0,05 | 350 |
580ST0,04 | 580 | 0,04 | 490 |
640ST0,035 | 640 | 0,035 | 515 |
750ST0,032 | 750 | 0,032 | 625 |
1000ST0,025 | 1000 | 0,025 | 800 |
1540ST0,016 | 1540 | 0,016 | 1060 |
where In is the rated operating current, L is the inductance of the throttle, and P is the loss in the reactor.
Recommendations for using network chokes in conjunction with Leroy Somer electric drives /Control Techniques
type of throttle | type of electric drive | |||||
Mentor MP | q-in | Unidrive SP | q-in | Unidirve M701 | q-in | |
5,5 ST 4,2 |
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| 1,5T /SP 1401 | 1 | M701-034-00025A10 | 1 |
11 ST 2,6 |
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| 2T /SP 1402 2,5T /SP 1403 3,5T /SP 1404 4,5T /SP 1405 | 1 | M701-034-00031A10 M701-034-00045A10 M701-034-00062A10 M701-034-00078A10 | 1 |
21 ST 1,4 |
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| 5,5T /SP 1406 8T /SP 2401 | 1 | M701-034-00100A10 M701-044-00150A10 | 1 |
29 ST 1 | Mentor MP25A4 (R) | 1 | 11T /SP 2402 16T /SP 2403 20T /SP 2404 | 1 | M701-044-00172A10 M701-054-00270A10 M701-054-00300A10 | 1 |
46 ST 0,64 | Mentor MP45A4 (R) | 1 | 22T /SP 3401 27T /SP 3402 | 1 | M701-064-00350A10 M701-064-00420A10 | 1 |
75 ST 0,39 | Mentor MP75A4 (R) | 1 | 33T /SP 3403 40T /SP 4401 | 1 | M701-064-00470A10 M701-074-00660A10 | 1 |
105 ST 0,23 |
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| 50T /SP 4402 60T /SP 4403 | 1 | M701-074-00770A10 M701-074-01000A10 | 1 |
150 ST 0,155 | Mentor MP105A4 (R) | 1 | 75T /SP 5401 | 1 | M701-084-01340A10 | 1 |
185 ST 0,13 | Mentor MP155A4 (R) |
| 100T /SP 5402 | 1 | M701-084-01570A10 | 1 |
220 ST 0,11 | Mentor MP210A4 (R) | 1 | 120T /SP 6401 | 1 | M701-094-02000A10 | 1 |
245 ST 0,095 |
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| SP 6412, SP 6411 | 1 |
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292 ST 0,08 |
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| 150T /SP 6402, SP 7411 | 1 | M701-094-02240A10 | 1 |
360 ST 0,065 | Mentor MP350A4 (R) | 1 | SP 7412, SP 8411 | 1 |
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460 ST 0,05 | Mentor MP420A4 (R) | 1 | SP 8412 | 1 |
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580 ST 0,04 | Mentor MP550A4 (R) | 1 |
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640 ST 0,035 | Mentor MP700A4 (R) | 1 |
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460 ST 0,05 |
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| SP 8413 | 1 |
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580 ST 0,04 |
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| SP 8414 | 1 |
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640 ST 0,035 |
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| SP 9411 | 1 |
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750 ST 0,032 | MP825A4, MP900A4 | 1 | SP 9413 | 1 |
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1000 ST 0,025 | Mentor MP1200A4(R) | 1 | SP 9414, SP 9415 | 1 |
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1540 ST 0,016 | Mentor MP1850A4(R) | 1 |
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Recommendations for using network chokes in conjunction with Leroy Somer electric drives /Control Techniques
type of throttle | type of electric drive | |||||
Powerdrive MD2 | q-in | Digidrive SK Commander SK | q-in | Unidirve M400 | q-in | |
5,5 ST 4,2 |
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| 1T /SKB 3400037 1,5T /SKB 3400075 | 1 | M400-024-00013 M400-024-00023 | 1 |
11 ST 2,6 |
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| 2T /SKB 3400110 2,5T /SKB 3400150 3,5T /SKC 3400220 4,5T /SKC 3400300 | 1 | M400-024-00032 M400-024-00041 M400-034-00056 M400-034-00073 | 1 |
21 ST 1,4 |
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| 5,5T /SKC 3400400 8T /SK 2401 | 1 | M400-034-00094 M400-044-00135 | 1 |
29 ST 1 |
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| 11T /SK 2402 16T /SK 2403 20T /SK 2404 | 1 | M400-044-00170 M400-054-00270 M400-054-00300 | 1 |
46 ST 0,64 |
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| 22T /SK 3401 27T /SK 3402 | 1 | M400-064-00350 M400-064-00420 | 1 |
75 ST 0,39 |
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| 33T /SK 3403 40T /SK 4401 | 1 | M400-064-00470 M400-074-00660 | 1 |
105 ST 0,23 | 60T | 1 | 50T /SK 4402 60T /SK 4403 | 1 | M400-074-00770 M400-074-01000 | 1 |
150 ST 0,155 | 75T | 1 | 75T /SK 5401 | 1 | M400-084-01340 | 1 |
185 ST 0,13 | 100T | 1 | 100T /SK 5402 | 1 | M400-084-01570 | 1 |
220 ST 0,11 | 120T | 1 | 120T /SK 6401 | 1 | M400-094-02000 | 1 |
245 ST 0,095 | 150T | 1 | SP 6412, SK 6411 | 1 |
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292 ST 0,08 | 180T | 1 | 150T /SK 6402 | 1 | M400-094-02240 | 1 |
360 ST 0,065 | 220T | 1 |
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460 ST 0,05 | 270T | 1 |
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580 ST 0,04 | 340T | 1 |
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640 ST 0,035 | 400T | 1 |
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460 ST 0,05 | 470T | 2 |
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580 ST 0,04 | 600T | 2 |
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640 ST 0,035 | 750T | 2 |
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750 ST 0,032 |
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1000 ST 0,025 |
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1540 ST 0,016 |
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