Abstract: DC auxiliary systems are usually relied upon as the last source of reliable electric power at an installation of power plants and substations. Because DC auxiliary systems and battery power sources differ from AC systems, it is important that DC system protection designer is aware of their special considerations. In Standard IEC 61660-1 is given mathematical model for dynamics analysi...

A recent technical paper in IEEE Open Journal of Industry Applications caught my attention. “Faulty Residential Circuit Breakers—A Persistent Fire Safety Problem,” by J. Aronstein [1] , is a very thorough study f...

Novel intelligent technique is a combination of fuzzy and neural network techniques that can be used to classify faults in electric power system protection. There have two problems in the protection system, which are: undesired tripping and fail to operate. Loss of power supply to relays and circuit breakers or failure in protective devices may cause failures in protection system. Construction ...

With the rapid development of DC power systems and increasing demand for circuit breakers, electromagnetic repulsive drives-based Thomson coil actuators (TCA) are widely investigated to provide high-speed actuating required ultra-fast mechanical switches, especially those used in hybrid breakers. The mechanism is be fast, reliable, economic. This article summarizes breakers recent years, furthe...