Some Applications of Rogowski Coils
One of the best ways to appreciate the versatility of Rogowski coil transducers is to consider the very wide range of applications that they have been used for.

Power Applications: Rotating Plant

• Measuring starting transients of electric motors.
• Split-phase current measurements in generators.
• Sudden short circuit testing.
• Protection system for slip-ring induction motors.
• Measuring the currents flowing in the framework of a large generator.

Power Applications: Static Plant

• Fault testing uninterruptable power supplies.
• Energy management measurements.
• Precision calibration of current transformers.
• Monitoring the ripple in battery chargers.
• Measuring currents in rectifier systems.
• Measuring power including low power-factor situations.
• Monitoring current transformer secondaries.

Power Applications: Transmission Plant

• Tracing earth faults in large and complicated conductor systems.
• Current sharing in parallel conductors.
• Measuring induced currents in the steelwork around a transformer.
• Measuring currents to earth in a transmission tower.
• High-current testing of switchgear and fuses.
• Protection systems.
• Measuring leakage currents down insulators.

Pulsed Power

• Measurements with lightning test equipment.
• Weld current measurements.
• Measuring the current in electromagnetic launchers (rail guns).

Railway Applications

• Monitoring the current in railway lines to check the signalling currents.
• Monitoring the traction current to ensure that the power systems in the locomotive do not produce frequencies that could interfere with the railway signalling.

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