Applications: The Rogowski Coil current sensor is suitable for measuring alternating electric currents (AC) and/ or fluctuating DC electric current pulses over a very wide operating range. Incorporating a Rogowski Coil current sensor into products used for electric power measurement, electric power quality monitoring, Supervisory Control and Data Acquisition (SCADA) or electric power distribution grid protective relays takes advantage of these performance characteristics. 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.

Technology: 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 primary current magnetic flux. The induced voltage is proportional to the rate of change of the current in the primary conductor. Integrating the resulting voltage signal (integral of dv/dt) provides a measurement of the current in the primary conductor. An explanation of the Rogowski Coil principle can be found in Wikipedia – Rogowski Coil. Application:

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.

iProbe Rogowski Coil Current Sensor Features:

• Frequency range: 0 to 20 MHz
• Accuracy: ±0.2% to ±2.0%
• Linearity: ±0.2% to ±0.5%
• Time response: 0.1 µ sec
• Measurement range: 1A to 300 kA

*NEW* Mini Loop, Split-core Rogowski Coil Current Sensor: Features a mini loop, split-core configuration intended for installation on relatively small diameter primary conductors without necessitating the taking of the primary conductor off-line for installation.

Model	Opening	SecondaryOutput/ Ampere)
iProbe-Y-R2080	80mm/ 3.15″	0.041mA/ A
iProbe-Y-RD2080 double coil	80mm/ 3.15″	0.092mA/ A
iProbe-Y-R2180	180mm/ 7.09″	0.088mA/ A
iProbe-Y-RD2180 double coil	180mm/ 7.09″	0.092mA/ A

Download Mini-loop Rogowski Coil Current Sensor Data Sheet (pdf 249kb)

Flexible, Rope style, Split-core Rogowski Coil Current Sensor: Features a split-core, rope style configuration which permits the mounting on large irregularly shaped primary conductors without necessitating the taking of the primary conductor off-line.

Model	Opening	SecondaryOutput/ Ampere)
iProbe-R2060	60mm/ 2.36″	0.041mA/ A
iProbe-R2080	80mm/ 3.15″	0.041mA/ A
iProbe-R1180	180mm/ 7.09″	0.088mA/ A
iProbe-R1200	200mm/ 7.87″	0.088mA/ A

Download Rope style Rogowski Coil Current Sensor Data Sheet (pdf 253kb)

Download Rogowski Coil Current Sensor Performance Data (pdf 1076kb)

Custom opening sizes can be designed and manufactured to meet the specific application requirements.