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Modern electric power distribution networks require flexible and cost effective solutions for measurement and grid protection purposes. Because conventional instrument transformers cannot always keep up with the changing demands, electronic instrument transformers are increasingly being used for the current and voltage measurements. Due to the different working principle of such sensors, the standardized...
The application of Rogowski sensors in protection and control equipment has many benefits compared to traditional instrument transformers. However, the signal levels of these sensors are small compared to possible disturbances, which raises questions regarding the immunity of such applications to switching transients. This contribution investigates a protection application with Rogowski sensors from...
Switching operations in the primary circuits of medium voltage switchgears are mostly attended by discharge processes in terms of pre- and restrikes between the switch contacts. Due to their high amplitudes as well as their steep wave fronts, such discharges are known to be very broadband and severe sources of electromagnetic disturbance. This contribution deals with the origin and the consequences...
Over the last decades, the worldwide market for medium voltage switchgear has shown a strong tendency to integrate power, control, protection and communication functions into a common panel. Today, this market demand is met by user-specific switchboards, consisting of modular composed switchgear panels with intelligent electronic devices (IEDs) for customized protection and control functionalities...
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