Current probe boost EMI with electrostatic shielding

Power Electronic Measurements (PEM UK) will launch its CWTHF current probe which offer higher frequency operation and improved E-field immunity (Hall 7- 123).

Clip-on Rogowski current probes are a convenient way to measure AC. The CWTHF joins the PEM’s CWT range of probes. The wideband probes use a novel electrostatic shielded Rogowski coil to provide immunity to interference from fast local dV/dt transients or large 50/60Hz voltages.

The CWTHF measures 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/micro seconds. The CWTHF probes feature a robust coil of 8.5mm thickness with a 10kV peak insulation voltage.

The probe is suitable for power electronics development work in 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.

Power Electronic Measurements designs and manufactures wide-bandwidth current measuring devices based on Rogowski technology. The company was founded in 1991 and pioneered the general-purpose, wide-band Rogowski transducer and continues to provide Rogowski transducers across a broad range of applications and industries, providing advice and support to engineers with current measurement challenges.

The company exports to over 35 countries worldwide and counts many of the world’s leading engineering companies and research institutions as its customers. In addition to standard product ranges to meet a variety of customers’ requirements, PEM also provides custom solutions, from one off designs to volume OEM products.

Latest News from Softei

This news story is brought to you by, the specialist site dedicated to delivering information about what’s new in the electronics industry, with daily news updates, new products and industry news. To stay up-to-date, register to receive our weekly newsletters and keep yourself informed on the latest technology news and new products from around the globe. Simply click this link to register here: Softei Registration