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Rogowski Coils (Flexible Rope CTs) with CTid



Rope CTs are designed for 30 amps or greater load. Lower amperage results in lower accuracy readings.

Rope CTs (technically called Rogowski Coils) are large, flexible sensors for monitoring current like split-core CTs. Rope CTs are installed similar to standard split-core CTs, where a connector on the rope allows it to be opened and placed around a conductor without needing to thread the conductor through it. Rope CTs are excellent for bus-bars and large switch-gear applications that standard split-core CTs cannot fit around. Rope CTs are flexible and easy to install but require a minimum amperage of approximately 30A for accuracy.

The CTid Rope CT is the same as the standard Rope CT but has a different style connector, contains CTid for auto-detection, and has an onboard LED that can be used to identify which CT is connected to a given sensor port, which can be useful if the CT leads cannot be traced from the meter to the conductors being monitored.


  • 1x Rope CT with built-in 8 foot leads and 2-pin plug affixed

Tech Specs

  • CTid Enabled
  • Frequency Range: 50/60Hz
  • Operating Temperature: -20 °C to 70 °C
  • Overvoltage Category: 1000V CAT III, 600V CAT IV
  • Positional: Error Better than 4%
  • Linearity: Better than 1%
  • Material: Orange thermoplastic rubber; flame retardant UL 94 V-0 rated
  • Cable: 1000V UL style 20940; External diameter 5mm; Wires 2x 26AWG
  • 5-year Limited Warranty


  • 30A minimum current required at all times


  • Linearity: better than 1% from (from 1 to 100% of rated current)
  • Positioning error: better than 4%