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CAGE Code: 5DME2
ITAR Registration Code: M28889

- June 28th 2017 -
Call: 1 (800) 377-3244
We Are Open Monday-Friday 8 am - 5 pm PT
E-mail: sales@coilws.com


Power Line Reactor Coil

Line and Load Reactors are used to protect motors and equipments by reducing the power line distortions, harmonics, surges and spikes caused by Variable Frequency Drives (VFD), DC Drives, SCR Drives, Rectifier Drives, etc. These various motor drives are used to adjust the speed of the motors by manipulating the waveforms which also resulted in creating higher frequency harmonics as the by products.

Line and Load Reactors are coils of wires wound on magnetic materials that are essentially inductors which oppose the rapid changes in current flow and reduce peak currents. These Reactors will also limit the starting current of a motor, reduce operating temperature of motors, reduce audible noise of motors, and improve efficiency of the overall system performance. Line Reactors are installed in series at the inputs of electronic motor controllers, and Load Reactors are installed in series between the motor controllers and the motor. The line and load reactors are designed the same way, with different values. Use of these Reactors can help in meeting the IEEE519 standards.

Applications of Line Reactors includes HVAC, pumping equipments, machine tools, elevators, UPS, Wind Generators, Electric Vehicle chargers, etc.

CWS offers both DC Line Reactors and AC Line Reactors. AC Line Reactors are for single phase and three phase lines.

How to Choose the Impedance of the Line Reactor.

1) 3% impedance line reactor will absorb spikes and surges and prevent unwanted tripping of drives in most applications. This is typically installed at the input of the drive controller.

2) 5% impedance load reactor should be chosen if harmonic content is severe or if the harmonics need to be reduced to meet IEEE519 requirements. This is typically installed at the input of the motor, after the drive controller.

It should be noted that connecting Reactors to a system will cause a voltage drop. This voltage drop will correspond to the current multiple by the impedance of the reactor.

A 5% Reactor will cause a voltage drop of 5% across the Reactor.



  Part Number Inductance DCR Max SRF (Self Resonance Frequency) Impedance @ SRF Price  
CWS-4KW-132UDC 1.30 mH 30 mOhm 200 KHz 5.0 KOhm
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CWS-4KW-501UAC 0.50 mH 20 mOhm 300 KHz 2.3 KOhm
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Disclaimer: Coil Winding Specialist, Inc., its affiliates, agents, and employees acting on behalf of Coil Winding Specialist, Inc. (collectively, CWS) disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. CWS reserves the right at any time and from time to time to make changes to design, technical specification, or construction of any product listed on this website without notice. CWS also reserves the right to discontinue or limit sale of any product or service available throughout this website on temporary or permanently basis without notice. CWS highly recommends customers not to use its products offered on this website for inappropriate use and applications. Products should be tested for its suitability by prospective customers in all possible applications and conditions. Customers using or selling CWS products for use in other than recommended applications do so entirely at their own risk and agree to fully indemnify CWS from any damages arising or resulting from such use or sale.


Any Comments, Suggestions or Questions? Contact us! Email: sales@coilws.com
CWS 353 West Grove Ave. Orange, California 92865
Call us Toll Free: 1-800-679-3184 or 1 (800) 377-3244

Tel: (714) 279-9010, Fax: (714) 279-9482

Copyright 2008, Coil Winding Specialist, Inc
Updated July, 2013

CAGE Code: 5DME2(Registered with www.ccr.gov)