Components for power electronics, automations, electronics, electric

The article presents innovative Rogowski probes from the PEM CWTUM-F and CWTUMHF-F series, designed for precise current measurement in tight PCB layouts. Thanks to their unique branched design, they allow non-invasive access to hard-to-reach conductors while maintaining high bandwidth (up to 30 MHz) and noise immunity. The new probes are used in the diagnostics of power converters, inverters, and motor drives, offering accurate reproduction of rapid current changes even in demanding electromagnetic environments.

The article explains what shielded cabinets and enclosures are and how they protect electronic equipment from electromagnetic interference (EMI) and electromagnetic pulses (EMP). It describes their operation as a Faraday cage, practical applications in data centers, laboratories, the military sector, and industry, as well as how to select the attenuation level according to needs. It emphasizes that investing in such solutions increases equipment reliability and data security.

The article discusses the penetration of magnetic fields through shielding materials and the factors determining the effectiveness of protection: the skin effect, the presence of holes and gaps, and the conductivity of fibers across different frequency ranges. It presents the results of tests on six materials – from ineffective to highly attenuating – emphasizing that the choice of shielding requires consideration of electrical properties, structure, and operating frequency.