The methodology of analysis of technical state assessment of circuit breakers

The paper presents the methodology of technical state assessment of the circuit breakers, based on technical diagnostics data, taking into account the level of short-circuit currents in the power system. The research provides the analysis of the impact of single-phase and three-phase short-circuit currents on technical state of 110-500 kV circuit breakers. The analysis of the short circuit currents in bulk regional power system, based on technical diagnostics and operational data of the circuit breakers, was carried out as an example. In the course of the calculations, the main regularities of the influence of short-circuit currents on the technical state of the circuit breakers were revealed, taking into account the analysis of the topology of the adjacent network.