PEM Rogowski coil high-frequency high-sensitivity CWTHF series current probe 30 A-300KA pulse high-current

Since more than 30 years ago, when it first introduced the wideband Rogowski current probe, PEM Ltd. has continuously developed CWT and now developed the shielded CWTHF to provide state-of-the-art wideband AC current measurement.

CWT and CWTHF combine the easy-to-use thin and flexible Rogowski coil with the ability to accurately replicate fast-switching current waveforms (whether sinusoidal, quasi-sinusoidal, PWM, or pulse wave).

Main Features

• Patented electrostatic shielded coil, with excellent immunity to 50/60Hz voltage fields and fast voltage transients.

• Models cover a frequency range from 0.03Hz to 30MHz:

• Current ratings from 30A to 300kA.

• Peak di/dt capability up to 120kA/μs.

• Coil insulation rating 10kVpk.

• 8.5mm (maximum) coil cross-sectional diameter.

• Load testing the circuit with only a few pH.

• Standard coil lengths from 300mm to 1000mm, with longer coil lengths available as an option.

Applications

• Current transient measurements in power electronic switching circuits.

• Lightning measurements.

• Power converter development and diagnostics.

• High-frequency sinusoidal currents, such as induction heating.

• Measuring small AC currents in the presence of large DC currents (e.g., monitoring capacitor ripple).

• Electromagnetic compatibility measurements in traction, motor drive, and power networks.

• Measuring fault currents or currents in pulsed power applications.