Rogowski Coil RCT-1800-000 by Magnelab

Product Description

The Magnelab RCT-1800-000 is a flexible Rogowski coil current sensor measuring AC current up to 5,000 Amps. It has an 18″ length and 6″ diameter and is extremely flexible.

The flexible Rogowski coil opens at the connector junction and can be installed on an existing cable or bus bar in a matter of seconds. The RCT-1800-000 comes without the integrator, and produces 70mV for every 1000A on the primary conductor, when operating at 60 Hz (at 50 Hz the output is 58.33 mV per 1000A). See our RCT-1800-xxx if you would like a Rogowski coil with an integrator (which will output 333 mV at the rated input amperage). You may also be interested in the new RCT-350T series Rogowski coils, which allow for use in smaller, tighter situations. The RCT-350T is available with or without an integrator.

Note that RCT-1800-000 has an output signal with a 90° phase shift (as do all Rogowki coils before correction).  For this reason the signal must be adjusted by the meter manufacturer or via the use of an integrator (see the RCT-1800-xxx for an example). The RCT-1800-000 Rogowski coil can be ordered WITHOUT the integrator when being used with Measurlogic, Veris and eGauge power meters.

The RCT-1800-000 is UL Recognized (E96927) to IEEE 57.13 and CAN/CSA 60044-1. Regarding safety, the RCT-1800-000 meets UL STD 61010-1 and CAN/CSA C22.2 No. 61010. The RCT-1800-000 is designed and made in the USA.

If you plan to measure amperages lower than 20A, you can wrap the Rogowski coil around the primary conductor twice to double the output, effectively allowing you to measure down to 10A with 1% accuracy. Following this principle, you can buy larger coils (such as the RCT-2400-000 or RCT-3600-000) to triple-wrap the primary conductor and increase the output even further (with a corresponding increase the ability to measure low currents).  As mentioned previously, the Rogowski coil output will be shifted 90 degrees and must be accounted for.

Frequent Applications

  • Energy sub-meters
  • Power meters
  • Power quality monitoring
  • Condition monitoring
  • Distributed measurement systems

Compatible power meters accept a voltage input and accept a flexible CT without the need for an integrator.  Look for Measurlogic and eGauge meters on our website that start with this symbol:


Alternatively, purchase a flexible CT that comes with an integrator unit, such as the RCT-1800-xxx or RCS-1800-xxx.  This will allow you to use any power meter that accepts a 333 mVac signal.

To see all Rogowski coil options visit our Rogowski Coil Product Page. You can view all of our current sensors here.


  • Input from 25 Amp to 15,000 Amp
  • Output of 70 mV for every 1000A input when at 60 Hz
  • Output of 58.3 mV for every 1000A input when at 50 Hz
  • Great for higher frequencies (up to ~10 kHz)
  • Linearity Accuracy 0.5%
  • 0.5% Accuracy from 20 Amps to 5,000+ Amps
  • Phase angle < 0.5 degrees measured at 50% rated current
  • Operating Temperature: -15°C to 65°C
  • Storage Temperature: -45°C to 80°C
  • 8 ft. shielded leads
  • Maximum Voltage: 600 V (on bare conductor)
  • 7-Year Warranty

Data Sheets

 Technical Spec
 Rope Installation Instructions
 Rope Positional Accuracy
 UL Installation Manual


UL Registered


Made in USA

ISO 9001

rohs compliant


Additional information

Weight.26 lbs
Dimensions7.0 x 7.0 x 1.0 in