Selektivita jistících prvků nn

Abstract

This thesis deals with the basic principle of the protection of low voltage and especially selectivity of protective elements, since today is just the most selectivity viewing. In the theoretical part is focused on a description of protection and selectivity, but also the operating principle and the most commonly used protective devices and fuses and circuit breakers. In the practical part I in the laboratory and using SICHR from OEZ tested this coordination function and safety elements. The conclusion is then given evaluation of the measurement.