Parameter Items H-FCT-200 H-FCT-350
Circumference 200mm 350mm
Inner Diameter 60mm 105mm
Coil Resistance 10-300Ω (General) 10-300Ω (General)
Coil Cross-section 8mm 8mm
Signal Cable Length Default 2m, Customization Supported Default 2m, Customization Supported
Current Measurement Range 1A-1000kA 1A-1000kA
Output Signal (di/dt) 1.1mV/kA@50Hz±5%；6.8mV/kA@50Hz±5% 1.1mV/kA@50Hz±5%；6.8mV/kA@50Hz±5% Internal Resistance Temperature Drift Coefficient 200ppm/℃ (Actual Measurement) 200ppm/℃ (Actual Measurement)
0A zero drift output ≤0.1mV ≤0.1mV
Angle difference ≤0.5° ≤0.5°
Linearity ±0.2% ±0.2%
Bandwidth 1Hz-50MHz(-3dB) 1Hz-50MHz(-3dB)
Operating temperature -30℃~80℃ -30℃~80℃
Storage temperature -40℃~90℃ -40℃~90℃

II. Materials and Safety Parameters
1. Materials
Coil body: Thermoplastic rubber for wires and cables, FUL 94 V-0 retardant
Connector: PC material
Coil color: Orange, Red
Shielding: 100% shielded coil, 100% shielded signal cable
2. Safety Certifications
Certificates: CE certificate, compliant with EMC EN 61326-1 2006 Standard
Protection Rating: IP68
Insulation Voltage: Coil 3000V, Signal Line 1000V
Safety Rating: 1000V CAT III, 600V CAT IV

III. Product Definition and Principle
A Rogowski coil, also known as a current measuring coil or differential current transformer, is a toroidal coil uniformly wound on a non-ferromagnetic material.
Output Signal: Differential voltage signal of current with respect to time; requires an integrator to reconstruct the true current.
Working Principle: Based on Faraday's law of electromagnetic induction; only suitable for AC and pulse current measurement.
Name Origin: Named after the Polish-born German physicist Walter Rogowski.

IV. Core Advantages
Easy Installation: Flexible, openable structure; can be directly wound with cables/buses; supports uninterrupted installation, suitable for scenarios where power cannot be interrupted, such as hospitals and rail transit.
Compact and Lightweight: Significantly smaller and lighter than traditional iron-core CT scanners; superior performance in high-current scenarios.
Good Linearity: No magnetic saturation; 10A-100kA full-range linear output; easy to calibrate; suitable for high-current scenarios such as welding machines and power transmission.
Low Inductance: Low inductance value; capable of measuring rapidly changing pulse currents at the nanosecond level.
Safe Low-Voltage Output: Output is a millivolt-level voltage signal; no secondary open-circuit high-voltage hazard; safe operation.

V. Main Application Areas
Fault Monitoring: Arc fault current, ground fault monitoring, power fault indicator.
Power Measurement: Smart meters, power quality analysis, grid harmonic monitoring, rectifiers/ Transformer Current Measurement
Industrial Equipment: Welding machine current measurement, motor overload/short circuit protection, medium and high voltage switchgear protection
Special Scenarios: current detection, capacitor discharge, remote terminal unit (RTU), synchronous phasor measurement unit (PMU)

VI. Customization Notes
Supports customization of parameters such as circumference, inner diameter, turns ratio, signal line length, and accuracy level. Special specifications can be developed as needed.