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www.ccr.gov
CAGE Code: 5DME2
ITAR Registration Code: M28889

- April 23rd 2017 -
Call: 1 (800) 377-3244
We Are Open Monday-Friday 8 am - 5 pm PT
E-mail: sales@coilws.com


Line Frequency

These encapsulated CT Series are used for Line Frequency from 15 Hz to 50Hz/60 Hz and up to 800 Hz current sensing applications. Typically uses are in watt meter, electricity dispensers, power calibrators, power transducers, precision power meters, digital meters for power systems and server motors.

Current Transformers are used to measure current for power management and controls, applications in safety protection and in current limiting. The CT Series Series are designed using various iron and nickel alloys, permalloy, amorphous and nanocrystalline tape wound core materials. It has an accuracy class of 0.1% to 5% depending on the series types.Please download the data sheets for specifications. Current transformer uses a single turn primary. The primary winding is not built into the transformer itself. It has an opening or hole for the primary wire or cable to go through. The number of secondary turns determines the current ratio. The turn ratio is from 500:1 up to 2500:1. Custom turn ratios are also available.

The terminating resistor is also called the "burden resistor", and it is the resistor across the secondary terminals. The voltage across the terminating resistor is equal to Terminating Resistor divided by Number of secondary turns. This is the voltage that is being measured by the engineer for current monitoring purposes.

The ambient operating temperature is -25 deg C to 125 deg C. Usually the linearity (accuracy) will degrade when the temperature drops below -25 deg C. CWS has developed a new CT-002A series that can be used at -40 deg C and still maintains the linearity.

For application where a DC current is also present in the line, please use our DC Tolerant Current Sense Transformers

Primary Current Range = 0 A to 25 A.
Through Hole
Turn Ratio = 1:1000
Operating temperature: -25 deg C to 125 deg C
-40 deg C to 85 deg C


Primary Current Range = 0 A to 20 A.
Through Hole
Turn Ratio = 1: 1000


Primary Current Range = 2 A to 10 A @ 50 Hz to 60 Hz.
Through Hole.


Primary Current Range = 2 A to 4 A.
Through Hole
Turn Ratio = 1: 1000


Primary Current Range = 10 A to 50 A of rms nominal.
Through Hole,
Current Ratio Range = (10A/10mA) : (500A/10mA)



Primary Current Range = 15 A to 100 A of rms nominal.
Through Hole
Current Ratio Range = (5A/2mA) : (200A/100mA)



Primary Current Range = 20 A to 40 A of rms nominal.
Through Hole

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)