Mouseover to zoom-in
Rogowski coil views
AcuDCAcuCT Flex - Left view
AcuDCAcuCT Flex - Right view
AcuDCAcuCT Flex - Front Side
AcuDCAcuCT Flex
C-RU-US
CE
Cert ROHS

Rogowski Coil Flexible Current Transformers

High specification line of flexible current transformers that measures AC current for power metering, power quality analysis and general use. The Rogowski coil provides a versatile solution when space is limited and requires a rope-style CT to physically wrap around a irregular shaped conductor or wire.

  • High accuracy for demanding applications
  • Wide frequency range means excellent choice for harmonics and power quality
  • Wide current input range from 5A – 50,000A AC
  • Choice of 16″, 24″, 36″ or 47″ length
  • No additional power supply needed when used with Acuvim II Series meters
  • Fully customizable selection of flexible CT

Rogowski Coil Overview

What is a Rogowski Coil?

A Rogowski coil is an instrument used to safely measure AC electrical current traveling through a primary conductor such as a cable or busbar in an electrical panel. Through a step-down process it can be used for metering or protection purposes. As electrical current flows through the conductor it induces a voltage in the coil in proportion to the conductor’s current and its frequency.

Choose a Coil Length

AcuCT Flex Series Rogowski coils are available in four standard lengths (circumferences): 16", 24", 36", and 47". The model number indicates the coil length. Custom lengths are also available; contact Accuenergy for more information.

Choose a Current Range

Suitable for nearly any application, four, standard current range options are available to choose from: 1000A, 2500A, 5000A, 10,000A, and 50,000A. If your project has a unique requirement, contact Accuenergy for custom current range options.

Choose a Lead Length

AcuCT Flex Series feature a standard 2 meter lead by default. They may also be ordered with 5m, 10m, or 15m leads to accommodate a variety of installation requirements.

Customize the Output Ratio

Easily customize the output ratio for any AcuCT Flex Series current transformer to match your unique project requirements. Contact Accuenergy for information on available options.

Rogowski coil overview

Rogowski Coil Models

RCT16
RCT24
RCT36
RCT47
Input Range 5A - 50000A
Output Option Multiple output options available for each length. View Table
Window Size 4.17" (106mm) 7.01" (178mm) 10.67" (271mm) 14.53" (369mm)
Length 15.75" (400mm) 23.62" (600mm) 35.43" (900mm) 47.24" (1200mm)
Accuracy 0.5%
Standard / Certifications UL Recognized UL Recognized UL Recognized UL Recognized
Form Factor Flexible Rope-Like CT
RCT GRIP Kit RCT-GRIP-M RCT-GRIP-L RCT-GRIP-L
RCT16
Input Range 5A - 50000A
Output Option Multiple output options available for each length. View Table
Windows Size 4.17" (106mm)
Length 15.75" (400mm)
Accuracy 0.5%
Standard / Certifications UL Recognized
Form Factor Flexible Rope-Like CT
RCT24
Input Range 5A - 50000A
Output Option Multiple output options available for each length. View Table
Windows Size 7.01" (178mm)
Length 23.62" (600mm)
Accuracy 0.5%
Standard / Certifications UL Recognized
Form Factor Flexible Rope-Like CT
RCT GRIP Kit RCT-GRIP-M
RCT36
Input Range 5A - 50000A
Output Option Multiple output options available for each length. View Table
Windows Size 10.67" (271mm)
Length 35.43" (900mm)
Accuracy 0.5%
Standard / Certifications UL Recognized
Form Factor Flexible Rope-Like CT
RCT GRIP Kit RCT-GRIP-L
RCT47
Input Range 5A - 50000A
Output Option Multiple output options available for each length. View Table
Windows Size 14.53" (369mm)
Length 47.24" (1200mm)
Accuracy 0.5%
Standard / Certifications UL Recognized
Form Factor Flexible Rope-Like CT
RCT GRIP Kit RCT-GRIP-L

Standard & Custom Output

Multiple options of output ratio such as 100mV/1000A, 40mV/1000A, 25mV/1000A, 10mV/1000A

Compatible with Acuvim II, Acuvim IIBN, Acuvim L, AcuRev 2100, and AcuRev 1310 series power meters, the flexible CT directly connects into the energy meter just like a standard split-core or solid-core CT.

Accuenergy power and energy meters
Output/1000A @ 50Hz
Output/1000A @ 60Hz
Range Calibrated to*
Standard & Custom Output
RCTxx-200 500mV 600mV 1A - 240A
RCTxx-500 200mV 240mV 2.5A - 600A
RCTxx-1000 100mV 120mV 5A - 1200A
RCTxx-2500 40mV 48mV 12.5A - 3000A
RCTxx-5000 20mV 24mV 25A - 6000A
RCTxx-10000 10mV 12mV 50A - 12000A
RCTxx-50000 2mV 2.4mV 250A - 60000A
RCTxx-Custom Output any ratio of signal per your requirement. Contact Us
Output/1000A @ 50Hz
RCTxx-200 500mV
RCTxx-500 200mV
RCTxx-1000 100mV
RCTxx-2500 40mV
RCTxx-5000 20mV
RCTxx-10000 10mV
RCTxx-50000 2mV
RCTxx-Custom Output any ratio of signal per your requirement. Contact Us
Output/1000A @ 60Hz
RCTxx-200 600mV
RCTxx-500 240mV
RCTxx-1000 120mV
RCTxx-2500 48mV
RCTxx-5000 24mV
RCTxx-10000 12mV
RCTxx-50000 2.4mV
RCTxx-Custom Output any ratio of signal per your requirement. Contact Us
Range Calibrated to*
RCTxx-200 1A - 240A
RCTxx-500 2.5A - 600A
RCTxx-1000 5A - 1200A
RCTxx-2500 12.5A - 3000A
RCTxx-5000 25A - 6000A
RCTxx-10000 50A - 12000A
RCTxx-50000 250A - 60000A
RCTxx-Custom Output any ratio of signal per your requirement. Contact Us

*”xx” denotes length of current transformer coil
This table of current sensing range only applies when coil directly connect with Accuenergy meters. Otherwise the sensing range is 5A to 50,000A

Rogowski Coil Features

rope-style form factor icon
Rope style form factor

The flexible, rope-like design of the AcuCT Flex Series is designed to easily fit into tight panels or around large busbars where rigid-body current transformers simply won't fit. Contour the coil to fit around irregularly-shaped conductors for easy integration in challenging environments.

Non-invasive design icon
Non-invasive design

Much like a split core, simple latching connector on the AcuCT flexible current transformer allows for fast, efficient installation without disconnecting any electrical conductors. Plus, the coil and connector is designed to be easy to use, even while wearing gloves.

Wide current sensing icon
Wide current sensing

Regardless of size, all AcuCT flexible CTs offer the same, wide 50A to 50,000A current sensing range to suit nearly any measurement objective. Unlike split core or solid core CTs that succumb to saturation beyond a certain amperage, the flexible Rogowski coil is capable of accurate, high-amperage measurements without saturating.

wide frequency response range icon
Wide Frequency Response Range

With an exceptional frequency response range of 10Hz to 20kHz, the AcuCT Flex current transformers are designed to quickly respond to changing current inputs, making them an ideal choice for any application with rapidly fluctuating amperages.

high accuracy icon
High Accuracy

The AcuCT Flex Rogowski coils are engineered for high accuracy, 0.5% current readings across the entire measurement range. Ideal for applications that require high-precision data, pair with a revenue-grade power meter to achieve maximum results in commercial, industrial, or specialized applications.

linearity icon
Linearity

When compared to other current transformer designs, flexible Rogowski coils provide an exceptionally linear output across their entire measurement range. Linearly following the input current results in superior accuracy no matter the installation environment.

Rogowski Coil Applications

1

AcuCT Flex Rogowski Coils

The AcuCT Flex Rogowski coils are available in multiple lengths and flexible, rope-like form factor is ideal for measurement around irregularly shaped conductors or in crowded electrical panels. With a wide measurement range, Rogowski coils are the superior choice for demanding applications.

Rogowski coil on primary conductor
2

Choose Installation Options

2

Accuenergy Rogowski Integrators

The Accuenergy Rogowski Integrators are designed to bridge the gap between AcuCT Flex Rogowski coils and devices without built-in integrator circuitry. Select from a number of industry-standard output signals and adapt to any installation with multiple, field-configurable ratio options.

RIK integrators
2

Accuenergy Power & Energy Meters

Accuenergy’s high-performance power and energy meters are designed for plug-and-play compatibility with any AcuCT Flex Rogowski coil current transformer. With integrator circuitry built right into each instrument, directly connect Rogowski coils without any additional hardware or special wiring required.

Accuenergy meters
2

Third-Party Devices with an Integrator

Some devices already contain integrator circuitry to support direct connection to AcuCT Flex Rogowski coils. Availability of multiple output ratios ensures compatibility with a wide range of devices. Check your device’s specifications to determine input requirements.

Third party devices
3

Third-Party Devices without an Integrator

Add the convenience of AcuCT Flex Rogowski coils to any third-party device without a built-in integrator. The Accuenergy Rogowski Integrator Kit connects devices such as such as a power meters, PLCs, RTUs, IEDs, or controllers to versatile Rogowski coils to overcome a range of installation challenges.

Third-party devices
4

EMS Platforms, Gateways, or Servers

An effective energy management system, comprised of gateways, servers, and other hardware, relies on high-quality, reliable energy data provided by power meters and high-accuracy sensors, such as the AcuCT Flex Rogowski coils, for comprehensive energy management.

EMS platforms, gateways, or servers
3

EMS Platforms, Gateways, or Servers

An effective energy management system, comprised of gateways, servers, and other hardware, relies on high-quality, reliable energy data provided by power meters and high-accuracy sensors, such as the AcuCT Flex Rogowski coils, for comprehensive energy management.

EMS platforms, gateways, or servers

Rogowski Integrator Kit

Rogowski integrator, coil and PSU

If you are connecting to a non-Accuenergy meter, an integrator may be necessary to amplify the output signal from the AcuCT flex Rogowski coil. Integrators can amplify and transduce the standard output from the Rogowski coil to a commonly accepted signal, such as 333mV or 5A. The integrator can also compensate for the Rogowski coil's inherent 90 degree phase shift. The Accuenergy Rogowski Integrator Kit (RIK) provides an easy-to-use solution for 3rd party power meters or other equipment. Select the integrator below that matches your device's input requirement.

RIK 5A
RIK 333mV
RIK mA
RIK V
Output 0 - 5A 0 - 333mV 0 - 20mA, 4 - 20mA 0 - 5V, 0 - 10V
Current Sensing Range 2.5 to 60,000A 2.5 to 60,000A 2.5 to 60,000A 2.5 to 60,000A
Configurable Input Ratios Field-Configurable Choices: 500A, 1kA, 2.5kA. 5kA, 10kA, 25kA, 50kA
Three-Phase option
Single-Phase Option
RIK 5A
Output 0 - 5A
Current Sensing Range 2.5 to 60,000A
Configurable Input Ratios Field-Configurable Choices: 500A, 1kA, 2.5kA. 5kA, 10kA, 25kA, 50kA
Three-Phase option
Single-Phase Option
RIK 333mV
Output 0 – 333mV
Current Sensing Range 2.5 to 60,000A
Configurable Input Ratios Field-Configurable Choices: 500A, 1kA, 2.5kA. 5kA, 10kA, 25kA, 50kA
Three-Phase option
Single-Phase Option
RIK mA
Output 0 - 20mA, 4- 20mA
Current Sensing Range 2.5 to 60,000A
Configurable Input Ratios Field-Configurable Choices: 500A, 1kA, 2.5kA. 5kA, 10kA, 25kA, 50kA
Three-Phase option
Single-Phase Option
RIK V
Output 0 – 5V, 0 - 10V
Current Sensing Range 2.5 to 60,000A
Configurable Input Ratios Field-Configurable Choices: 500A, 1kA, 2.5kA. 5kA, 10kA, 25kA, 50kA
Three-Phase option
Single-Phase Option

Rogowski Mount Installation Kit

Rogowski Mount Installation Kit

The RCT GRIP Kit securely mounts the Rogowski coil in place, ensuring the conductor is optimally positioned within the coil window. By preventing shifts or misalignment, it enhances measurement accuracy and stability, making it ideal for revenue-grade metering. Designed for quick installation, the GRIP Kit minimizes mechanical strain on the coil, extending its lifespan.

RCT-GRIP-M
RCT-GRIP-L
Dimensions 3.08" to 4.14" x 2.91" x 1.97"
78.25 to 105.25mm x 73.8mm x 50.0mm		 5.54" - 7.12" x 2.87" x 1.97"
140.75 - 180.75mm x 73.0mm x 50.0m
Conductor Busbar, Cable Busbar, Cable
Weight 57g 118g
Rogowski Coil AcuCT Flex RCT 24 AcuCT Flex RCT 36 and RCT 47
RCT-GRIP-M
Dimensions 3.08" to 4.14" x 2.91" x 1.97"
78.25 to 105.25mm x 73.8mm x 50.0mm
Conductor Busbar, Cable
Weight 57g
Rogowski Coil AcuCT Flex RCT 24
RCT-GRIP-L
Dimensions 5.54" - 7.12" x 2.87" x 1.97"
140.75 - 180.75mm x 73.0mm x 50.0mm
Conductor Busbar, Cable
Weight 118g
Rogowski Coil AcuCT Flex RCT 36 and RCT 47