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The influence of the design and method of short-circuit current measurement on the possibility of parallel operation of high-speed circuit breakers

Nowak Łukasz, Borkowski Piotr, Rojek Artur

Archives of Electrical Engineering

2025

Vol. 74, nr 4

827--848

This article describes various designs of high-speed DC circuit breakers used in the world and current detection methods using modern current sensor solutions. The criterion for selecting circuit breakers for testing was their certification for use in the European Union – the LOC&PAS TSI certificate of conformity (Commission Implementing Regulation (EU) 2023/1694). The possibility of parallel operation of circuit breakers from different manufacturers and different methods of switching off the short-circuit current were analyzed. Tests were carried out at a 3 kV traction substation in real operating conditions of circuit breakers, which allowed us to answer the question regarding the possibility of using two different types of circuit breakers on one traction vehicle.