RCT-180L – UL Listed Flexible Rogowski Coil

UL Listed RopeCT 0.070 Vac Output at 1,000A 0.5 Class

6 Inch Diameter RopeCT


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UL Listed Magnelab RCT-180L Flexible Rogowski Coil Top Features

The Magnelab RCT-180L is a single-phase, UL listed flexible Rogowski coil (Rope CT) that measures AC current up to 15,000 amps with an output of 0.333 Vac and an industry leading 0.5% linearity accuracy. In addition, it provides an output of 0.070 volts AC at 1000 amps through the primary when operating at 60Hz (at 50 Hz the output is 58.33 mV per 1000 A). Furthermore, it has a 18″ length, 6″ diameter and is extremely flexible.

The flexible Rogowski coil opens at the connector junction and may be installed on a bus bar or existing cable in a matter of seconds. The RCT-180L is sold with or without an integrator. Integrators sold separately. Additionally, the Rogowski coil and integrator may be purchased as a package with one phase or three phases.

For more information on why it is important to use UL listed Rogowski coils, please click this link:

Most Common Uses

The linearity accuracy of the RCT-180L is 0.5%. It is important to know your measuring needs so that we may calibrate the integrator to the correct output, if needed. The coil itself does not require an external power supply; however, the integrator requires between 12 and 30V AC or DC. This also may be purchased from Magnelab as a separate option.

If you intend to use your RCT-180L with certain power meters, you will not need an integrator. These meters have a built-in integrator designed to work with Magnelab coils. Contact us at 303-772-9100 or at for more information on metering companies whose meters include the integrator for Magnelab coils. This device is most commonly used in power meters, energy sub meters, condition monitoring, power quality monitoring and distributed measurement systems. It is fully UL, CSA and RoHS compliant, as well as meeting CE and ISO standards. This product is made in the USA.


  • Rated input from 250 amps to 15,000 amps (UL rated to 5,000 amps)
  • Output of 0.070 volts per 1,000 amps
  • Linearity Accuracy 0.5%
  • Custom diameters, output, and other parameters are available
  • UL listed

Click on the SPEC SHEET button above to learn more about this Current Sensor & Rogowski Coil.

Click here for Installation Instructions.

Magnelab reserves the right to modify products to make improvements without advance notice.


RCT-1200-000 Coil 12” Length
RCT-1800-000 Coil 18” Length
RCT-2400-000 Coil 24” Length
RCT-3600-000 Coil 36” Length

Dimension-Performance Rope Coil