Study of coordination and selectivity in circuit breakers

Abstract

This paper aims to study the coordination and selectivity of the electrical system of the substations of the terminal tip of the wood, consisting of defining the settings of the protection devices, which in the occurrence of a short circuit is only affected the region of protection action, isolating the smallest part of the electrical system, in the shortest possible time without loss of production and equipment malfunctions, with the aid of nominal data and damage curves of the electrical equipment can generate "time versus current" graphs provided by the software digs siprotec . In the test carried out on the protection devices the three-phase currents of I> or I> were taken into account for the phase-earth currents I0 >> or I0>. The results of the tests were satisfactory due to the efficiency of the software disg siprotec.