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.