FIELD APPLICATION ENGINEER
A Rogowski coil is a sensor used to measure electric currents or changing magnetic fields. It is especially used in alternating current (AC) circuits. The Rogowski coil determines the value of the electric current by measuring the voltage induced by the action of the magnetic field.
LEM Rogowski Coil Products,
AI-PMUL Series
Rogowski coils. They are compatible with LEM’s ART and ARU series.
Input Signal
Rogowski coil precision: 22.5, 70, 80, 85, 100, 120 mV/kA (@ 50 Hz) Current measurement range: 100, 200, 300, 400, 500, 600, 800,1000, 1500, 2000, 4000, 5000AOver-current measurement range, 120% selected range
(over-current indicator with LED) Rated frequency 50/60 Hz Frequency bandwidth (- 3dB) 4 ~ 1600Hz
ART Series
It is a Rogowski coil used for AC current measurement.
Product Features
- The most sensitive coil on the market, Class 0.5 (IEC 61869-10)
- Very low positioning error
- Low sensitivity for indoor applications (22.5MV/kA)
- Electrostatically isolated to improve the shared mode attenuation of the integrator.
- Protection rating: IP57 70, 125, 175, 250 and 300mm detection range
- Operating temperature: -40~+80°C
- 1.5m to 6m cable length
- The cable end is equipped with SMA male connector.
ARU Series
It is an IP68 protected Rogowski coil used for AC current measurement and suitable for outdoor use.
Product Features
- Designed for outdoor use (acc. to UV, water, dust and ice standards)
- High sensitivity 100mV/kA @ 50Hz
- Flexible circular shape
- Rated insulation CAT III 1000 V PD2, CAT IV 600 V PD3 Class 0.5 (IEC 61869-10)
- Protection rating: IP68
- 125, 175, 250 and 300mm detection range
- Working temperature: -40~+80°C
- 3m to 6m cable length
- With its innovative patented coupling, it greatly reduces
- Positioning error
- With its built-in guard, it provides improved measurement accuracy at low primary currents.
Applications
- Outdoor substations
- Distribution transformer Monitoring
- Medium voltage isolated cable distribution
- Underground substations
- Pole-mounted transformers
- Low voltage lines
- Distribution system equipment
