FQ-RCTA03 3000A Flexible Rogowski coil AC current transformer CT

flexible current transformer

The FQ-RCTA03 rogowski coil flexible current transformer is designed for easy installed in tight spaces and without the need for dismantling the primary bus bar or cables. It includes a flexible Rogowski coil probe and electronic modules. The signal from the coil probe can be amplified by the electronic amplifier modules through the integration processing.



The output signal can be directly used in oscilloscope, digital multimeters, power quality analyzer or data logger recording instrument. Excellent linearity, easy to use, measuring large current, three stall 6000A/3V, 600A/3V, 60A/3V or 3000A/3V, 300A/3V, 30A/3V, lower phase shift. In particular, it can be installed in tight spaces, around cable bundles, around wide or large bus bars, or even wrapped around irregular shapes. Models range from 1 to 100,000Arms with an accuracy of 1% of reading. Rated EN 61010, 600V CAT IV, 1000V CAT III. This feature facilitates positioning the ct sensor around the conductor, enhances user safety, and alleviates the drooping effect associated with other flexible sensors.


  • Oscilloscope;
  • Power quality analyzer(PQA);
  • Power and harmonic meters;
  • Phase angle meter;
  • Energy meter calibrator;
  • Measuring around cable bundles;
  • Power load monitoring;
  • Data logging/recording;
  • Waveform analysis;
  • Energy sub-meters;
  • Power meter;
  • Multimeter;


  • Measurement range of 1A to 6000A AC;
  • Low phase shift for power measurement;
  • Excellent linearity 0.2% for current measurement;
  • Frequency 0.1Hz-2MHz Bandwidth;
  • 6000A/600A/60A/3V or 3000A/300A/30A/3V range;
  • Holding wire diameter: φ305mm/190mm/120mm;
  • With harmonic measurement;
  • Improved ergonomic design & easy operation;
  • High permeability magnetic material core;
  • Conforms to EN 61010, 1000V CAT III;
  • Designed for DMMs, power recorders, oscilloscopes, power and harmonic meters;
  • CE, UL, CNAS mark;

General data

  • Operating temperature & humidity 0 to 50°C (32-122℉),≦80%RH(No condensate)
  • Storage temperature & humidity: -10 to 60°C (14-140℉), ≦80%RH(No condensate)
  • Operating environment: Indoor, altitude up to 2000 meters
  • Standards Safety: IEC61010-1:2001, 600V CAT III


Electrical parameters
Model FQ-RCTA03-120 FQ-RCTA03-190 FQ-RCTA03-305
Current range 60A/600A/6000A or 30A/300A/3000A
Frequency 10Hz - 20kHz
Output voltage Rated current 6000A/3000A 6000A/3000A 6000A/3000A
50Hz 3V AC 3V AC 3V AC
Max output 30kA
Output sensitivity 50mV/A, 5mV/A, 0.5mV/A; 100mV/A, 10mV/A, 1mV/A
Accuracy <1% @25°C (45-65Hz)
Phase error <60' @25°C (45-65Hz)
Ratio 50mV/kA, 85mV/kA, 100mV/kA (50Hz)
Coil section diameter 8mm
Output sensitivity ±2% Max (No Calibration)
±0.5% @25°C (With Calibration)
Linearity error ±0.2% RD
Position Sensitivity ±1%
External Influence ±1% Max
Bandwidth 0.1Hz - 2MHz(-3dB)
Temperature coefficient ±0.08%/°C of the reading data
Load impedance Min 100KΩ
Power Supply 9V DC battery or customized
Lead length 2.5m
Standard EN 61010-1, EN 61010-2-032, EN 61010-2-031
IEC60044-1, & IEC61869-2, 1000V CAT III
Output terminals 0.5m cable with Safety BNC plug
Weight 150g - 360g
Operation temperature -30°C to +80°C
Storage temperature -40°C to +90°C
Notes: Can be customized current probe according to user requirements!


Dimensions(mm) FQ-RCTA03-120 FQ-RCTA03-190 FQ-RCTA03-305
Window A 120 190 305
Coil OD B 145 205 335
Coil Length C 400 600 1000
Output connection 1. UL2586-ESB 2x24AWG L=150cm (as required)
2. Coax terminated with safety male BNC connector L=250cm (as required)
3. UL2586-ESB 2x24AWG L=150cm (as required) with integrator

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