Short Circuit Analysis of Air Circuit Breaker

Abstract

In this paper, the overall effect of the different parameters which affect the circuit breaker at the time of short-circuiting is to be elaborated. The air circuit breaker is a switching device that is used to make and hold current under normal conditions and to break the current under abnormal conditions. Due to the short circuit current, a greater amount of detrimental energy is emitted in the form of heat and magnetic force. So it is vital to calculate and analyze the electro-dynamic repulsive forces appearing on the movable conductor. By the usage of the finite element analysis, current, magnetic field, repulsive forces have been simulated with the assist of the contact bridge model. With different configuration and model simulations and experiments been carried out for repulsion forces. The end result shows the tremendous use of no of contact system in the model to gain efficient force at the contact surface.

Keywords: Short Circuit, FEM, Electro-Dynamic Forces, Parallel Conductor, ACB