Three Phase Rogowski Coil converter

FCA3000 Three Phase coil converter


  • Three Rogowski coils input channels
  • Three true RMS DC outputs
  • One DC output for channels sum
  • 0à·20 mA, 4à·20 mA or 0à·10 VDC output
  • Response time selectable by jumpers
  • Suitable for three-phase systems
  • 3000 A standard full scale value
  • Customizable full scale up to hundreds kA
  • Compact 9 DIN modules size


  • True RMS current measurement
  • PLC interface
  • Power monitoring and control systems
  • Individual machine loading
  • SCADA systems
  • Very high current measurement


Power supply
  • Rated voltage: 80à·260 VAC (45-65 Hz)
  • Consumption: 3 VA max
Measuring inputs
  • No: 3
  • Type: for Rogowski coil with signal equalization
  • Sensitivity: 100 mV/kA standard value
  • Full scale: 3000 A @ 100 mV/kA standard value from 300 A to 300 kA on request
Analog outputs
  • No.: 4
  • Type: 0à·20mA standard value 4à·20mA or 0à·10 VDC on request
  • Response time: 150 ms default value - selectable by jumpers from 50 to 150 ms approx.
  • Typical accuracy: ± 1% reading ± 0.3% full scale
Environmental conditions
  • Operating temperature: from -10 °C to +50 °C
  • Protection degree: IP20 IP20
  • Size / weight: 115x100x23 mm / approx 117 gr
Standards compliace
  • Safety: 73/23/EEC and 93/68/EEC directives, EN61010.1 safety standard
  • EMC: 89/366/EEC directive and following modifications 93/31/EEC and 93/68/EEC, EN50081-2, EN50082-2, EN61326/A1

(1) The Rogowski coil output is proportional to the rate of change of current. The calculation formula is: Ampere rms x Hertz x K x 10-6, where K depends on manufacturing. The K value is 2 for 100mV models.

(2) RPS50 is delivered with the specified accuracy. Moreover, the calibration of each scale is adjustable by user to achieve the maximum accuracy in conjunction with the coil.

(3) The low limit is approximate and it is determined by noise effect on very low signals.