RCM
Flexible Rogowski Coil Ø 8mm

Rogowski coil flexible current sensors, particularly suitable for measurement in combination with portable devices, or for current measurement in confined or hard-to-reach locations without interrupting the current flow.

  • Class 0.5 accuracy according to IEC 61869
  • Accuracy better than 1% regardless of the position of the main conductor
  • Nominal insulation voltage 1kV CATIII
  • From 5 to 7200 ARMS
  • Thin, lightweight, and flexible split-core current sensor for easy installation anywhere.
  • Almost perfect linearity, no saturation, no upper limit on nominal current.
  • Internal shield.
  • Low output voltage proportional to the rate of change (derivative) of the primary current (electronic integrator required): 50 to 100mV/kA at 50 Hz, depending on the model.
  • Cable length: 2 meters (more on request)
Certifications

Description

The RCM series is a new generation of flexible Rogowski coil current sensors, which are particularly suitable for measurement in combination with portable devices. The RCM coils come in different sizes to fit various conductors. The new generation of RCM coils strengthens the shielding layer and significantly reduces the influence of external magnetic fields. They can be directly connected to our rail-mounted or panel-mounted measuring units without the need for external integrators. The RCM series coils have an IP68 protection rating, making them perfect for outdoor use.

Typical Applications

  • Medium/Low Voltage Substations: monitoring transformer condition

  • Power Measurement: current measurement for active power calculation

  • Building Submetering: energy efficiency monitoring, consumption analysis, and cost allocation

  • Energy Quality Monitoring: electrical loads and distribution system equipment

  • Fault Detection, Isolation, and Restoration (FDIR)

  • Control Centers and Remote Terminal Units (RTU)

  • Automation

  • Smart Grids

Advantages

  • Excellent linearity
  • Long-term stability
  • Zero power consumption
  • Low position error
  • Excellent rejection to external conductor
  • No risk of damage in case of heavy overload
  • No danger in case of opening the secondary circuit
  • Flexible and lightweight
  • Easy to install
  • Wide range of diameters
  • Default cable length of 2m (other lengths available on request)
  • IP68 protection level

Dimensions and Installation

Dimensions (mm) RCM100 RCM150 RCM200
A. Size of Window A 135 165 210
B. Size of Window B 100 150 200
C. Outer Diameter of the Coil 151 181 226
D. Coil Section 8
E. Total Length of the Supply Cable 2000
F. Length of the Coil 395 525 665

Tolerance on dimensions: A, B, C, F: +5mm, D: +2mm, E: +10mm

Position Sensitivity

Conductor PositionTypical Error(%)
Adjacent to Immersion Mechanism 0.5%
Adjacent to Inner Coil Edge 0.8%
Adjacent to Opposite Clip 1%

Reference Table

Commercial Reference Nominal Current Ratio @ 50 Hz Diameter Color
RCM-200B-050 6000A 50mV/kA 200mm Blue
RCM-150B-85 3000A 85mV/kA 150mm Blue
RCM-100B-85 1000A 85mV/kA 100mm Blue
RCM-1000-100 1000A 100mV/kA 100mm Orange

Technical characteristics

Characteristics
Manufacturing Tolerance <0,5% (calibrated)
Temperature Drift Coefficient of Sensitivity <100ppm/°C
Temperature Drift Coefficient of Internal Resistance <3800ppm/°C Please contact us for exact value
Measurement Accuracy Class 0.5% (Vertically Centered Position)
Internal Resistance 50-250 Ω
Position Error <1%
Output at OA (Zero Drift) <0.05mV
Phase Error <0.5° (45Hz – 65Hz)
Linearity +0,1%(1% – 100%)
Bandwidth (3dB) 1Hz – 20KHz
Operating Temperature -40°C – 85°C
Coil Section 8mm
Cable Length (default) 2m (other lengths on request)
Materials
Coils and Cables Flame-retardant thermoplastic rubber, UL 94 V-0 class
Closure System PC, ABS, class UL 94 V-0
Color (coil) Blue (standard) or Orange
Isolation
Applicable Voltage Range 1000V CATIII, 600V CATIV
Dielectric Strength 7400Vac @ 50/60Hz 1Min
Certifications CE, Cmim, IP68, Rohs 2.0

Contact us for special characteristics and dimensions if needed

Product Documentations

Related Products