PEM Rogowski coil high-frequency high-sensitivity CWTHF15 type current probe 3000 A/30M

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 measurements.

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, excellent immunity to 50/60Hz voltage fields and fast voltage transients.

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

• Current ratings from 30A to 300kA.

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

• Coil insulation rating 10kVpk.

• Maximum coil cross-section diameter 8.5mm.

• Load testing the circuit with only a few pH.

• Standard coil lengths from 300mm to 1000mm, but longer coil lengths are available.

Applications

• Current transient measurement in power electronic switched circuits.

• Lightning measurement.

• 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 drives, and power networks.

• Measurement of fault currents or currents in pulsed power applications.