This paper studies the mechanical characteristics of the breaker operating mechanism. On the basis of theoretical analysis of operating mechanism and abnormal mechanical characteristic curve

and testing of the mechanical characteristics of the hydraulic spring and spring operating mechanism of high-voltage breakers for 40.5 kV

252 kV and 1 100 kV voltage levels. The influence of the mechanical characteristic parameters on the mechanical properties of the operating mechanism is studied. Theoretical and experimental studies show that the mechanical properties of the operating mechanism can reflect the mechanical condition of the mechanism. By analyzing the mechanical characteristics of the operating mechanism

the operating condition of the operating mechanism can be assessment. The research results have the guiding significance for the assessment of circuit breaker operation mechanism.