About Monitoring of Medium Voltage Circuit Breakers with SF6

Medium voltage circuit breakers are important components on the chain of production, transmission and distribution of the energy to the consumers. The circuit breaker importance is from its capacity to make and break the currents from normal rated parameters and from short circuit currents. Over time the circuit breakers are losing them properties to break the high currents because of ageing and other electrical and mechanical stresses. From this fact is necessary to monitoring some parameters of circuit breaker. The goal of circuit breakers monitoring is to know its condition for minimize the equipment failure risk and to prevent undesirable interruptions and their effects. The paper presents the importance of a medium voltage circuit breaker with SF₆ in the power system, a monitoring system which was interfacing with the circuit breaker, respectively the waveforms and values obtained from its.