Dynamic Study and Stress Analysis of Mechanism in Circuit Breaker

Abstract

The need of electrical energy without interruption is becoming more and more important. To meet this requirement, the demand on reliability of each individual component is increasing. The circuit-breaker constitutes the last link in the chain of the protection equipment for a power supply system.

The dynamic analysis of mechanism, enables industries to save cost and reduce time that spend on performing mechanical testing of actual prototype of mechanism. Due to the wide range of physical principles involved in high voltage circuit-breakers, different numeric tools have been employed to simulate and understand mechanics, hydrodynamics and electrical behaviour. In power transmission or distribution net- work, circuit breaker provides automatic protection in response to abnormal load conditions. The circuit breaker may therefore be called upon to perform a number of different operations such as interruption of terminal faults or short line faults, interruption of small inductive currents, interruption of capacitive currents, out-of- phase switching or no-load switching.

The objective of the dissertation is to primarily study dynamic behaviour of mechanism of the circuit breaker when it is operated to the ON condition. The stresses developed on different components of the mechanism are determined using the PRO-E software. The results of software are compared with analytical solutions.