New Industry Products

New Current Probe Offers High Bandwidth and Novel Electrostatic Shielding for Excellent Interference Immunity

April 04, 2019 by PEM Ltd.

This article features Power Electronic Measurements (PEM) Ltd CWTHF new current probe which offer higher frequency operation and improved E-field immunity.

Power Electronic Measurements (PEM UK) Ltd will be using PCIM Europe to launch the new CWTHF current probe which offer higher frequency operation and improved E-field immunity. 

Clip-on Rogowski current probes provide a convenient, wide-bandwidth and accurate means of measuring alternating currents.  The CWTHF is the latest addition to the company’s CWT range and these new wideband probes use a novel electrostatic shielded Rogowski coil to provide excellent immunity to interference from fast local dV/dt transients or large 50/60Hz voltages. The new CWTHF offers the ability to measure faster current transient rise-times, achieving a high frequency (-3dB) bandwidth of up to 30MHz for a 300mm coil and can handle a maximum current slope of over 100kA/µs. The CWTHF probes feature a robust coil of 8.5mm thickness with a 10kV peak insulation voltage.

Ideal for a wide variety of applications, including power electronics development work in today’s demanding noisy high-speed applications, EMC and power quality measurement in motor drives and traction, pulsed power measurements and even lightning strike currents, the CWT is available in current ratings from 30A to 300kA, with coil circumferences of 300 to 1000mm as standard and longer available on request.


About PEM

Power Electronic Measurements Ltd (PEM) are established market leaders in the design and manufacture of wide-bandwidth current measuring devices based on Rogowski technology.

Founded in 1991 PEM can justly claim to have pioneered the general purpose wide-band Rogowski Transducer. Previously this technology was relatively unknown and only used for a few specialist applications.

PEM continues to provide state-of-the-art Rogowski transducers across a broad range of applications and industries and provides advice and support to engineers with current measurement challenges. To date, PEM has exported to over 35 countries worldwide and can count many of the world’s leading engineering companies and research institutions as its customers.