Flexible Current Transformer – RCT-3600-000 by Magnelab

Product Description

The Magnelab RCT-3600-000 is a flexible current transformer measuring AC current up to 5,000 Amps. It has a 12-inch diameter.

This flexible current transformer opens at the connector junction and can be installed on an existing cable or busbar with ease. The RCT-3600-000 is a 36-inch rope (12″ diameter) without an integrator, such that it produces 70mV for every 1000A detected on the primary conductor, when operating at 60 Hz.  When at 50 Hz the output is 58.33 mV per 1000A.  The output will be out-of-phase 90 degrees until corrected.

See our RCT-3600-xxx if you would like a Rogowski coil with an integrator (which will output 333 mV at the rated input amperage and will correct the phase shift). The Magnelab series Rogowski coil is available in smaller sizes or it can be custom-made to your size requirements (additional cost).

The RCT-3600-000 flexible current transformer is UL Recognized (E96927) to IEEE 57.13 and CAN/CSA 60044-1. Regarding safety, the RCT-3600-000 meets UL STD 61010-1 and CAN/CSA C22.2 No. 61010. The RCT-3600-000 is designed and made in the USA.

If you plan to measure amperages lower than 20A, you can wrap the flexible current transformer around the primary conductor twice to double the output, effectively allowing you to measure down to 10A with 1% accuracy. Along these lines, you can triple the output by wrapping three times around the center conductor.  As noted previously, the output must still be corrected for phase shift.

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-3600-xxx or RCS-3600-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.


  • 36″ rope length (~12″ opening)
  • Input from 20 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 1%
  • 1% 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 Specs
 Rope Installation Instructions
 Rope Positional Accuracy
 UL Installation Manual


UL Registered


Made in USA

ISO 9001

rohs compliant


Additional information

Weight0.6 lbs
Dimensions12 x 9 x 5 in