Rogowski Coil Current Sensors
The Rogowski Coil current sensor is suitable for measuring alternating current (AC) and/ or fluctuating DC current pulses. The sensor operates on the principle that a voltage is induced in a coil whose plane is perpendicular to the conductor carrying the electrical current and perpendicular to the magnetic flux. The induced voltage is proportional to the rate of change of the current in the conductor. Integrating the resulting voltage signal (integral of dv/dt) provides a measurement of the current in the conductor. An explanation of the Rogowski Coil principle can be found in Wikipedia – Rogowski Coil. Suitable for incorporation into products used for electric power measurement, electric power quality monitoring, Supervisory Control and Data Acquisition (SCADA) or protective relays. The Rogowski Coil current sensor is ideal in applications where it is necessary that the sensor be capable of responding to a wide operating current range, a wide frequency range and/ or is exposed to harsh operating conditions.
Advantages:
- Low inductance enables the sensor to respond to fast-changing currents.
- Highly linear output when subjected to large currents changes (no magnetic core to saturate).
- Largely immune to electromagnetic interference with equally spaced windings.
Rogowski Coil Current Sensor Features:
- Frequency range: 0 to 100 kHZ
- Accuracy: ±0.2% to ±2.0%
- Linearity: ±0.1% to ±0.5%
- Time response: 0.1 µ sec
- Measurement range: 1A to 6,000A
JRF333M/MB models are the mini-loop split and the flexible split Rogowski Coil current sensors configured with a voltage integrator (integrating the dv/ dt signal) to provide a proportional voltage output to the primary conductor current.
*NEW* JRF MOI models are the flexible split Rogowski Coil current sensors configured with an internal voltage integrator (integrating the dv/ dt signal) to provide a proportional voltage output to the primary conductor current. Fix Mounted Rogowski Coil Current Sensors – Intended for applications where the current sensor is mounted in a fixed position. The installation requires the taking of the primary conductor offline and disconnecting for installation.
The model JRLO is one example of the types of sensors that are available. Configurations are available in toroidal or eliptical configurations suitable for BUS bars.
Many of our products can be designed and manufactured to meet the specific application requirements. For a no obligation technical evaluation, contact us with your specific performance requirements.
