Electromagnetic Field Analysis Coupling with Motion for A High Speed Circuit Breaker

Abstract

A high speed circuit breaker has been developed using the transient electromagnetic field analysis coupling with motion based on the finite element method. This breaker has an opening time of 1ms and a break time less than 1cycle (20ms). The driving part of the breaker is composed of electromagnetic repulsion mechanisms and disk springs with nonlinear characteristics. Here 24kV-20kA rated high speed circuit breaker has been developed using this analytical method. This breaker has a new driving mechanism of Coil-Coil repulsion and we found that the new mechanism is better than the conventional Coil-Plate repulsive one.