Tepelné poměry v jističi při zkratu

Abstract

This thesis deals with the thermal conditions of Low Voltage Circuit Breaker in the Course of Short Circuit. It represents a complete thermal and structural analysis of path current circuit breaker in the operation of a short circuit. Permissible size of the warming current circuit identifies a number of important fragments. The temperature of the circuit breaker components must not cause undue physical changes in them or around them. All of the following temperature-induced changes result in deterioration of properties such as safety, functionality, reliability and durability of the electrical device. Using finite element method in the program Ansys have been dealt thermal conditions current circuit in the circuit breaker.