Method for detecting electrical state of high-voltage circuit breaker

Abstract

The invention relates to a method for detecting an electrical state of a high-voltage circuit breaker. The method comprises step of detecting the conduction performance and the on-and-off performance of the high-voltage circuit breaker. Direct current is exerted at both ends of the high-voltage circuit breaker; a voltage drop at both ends of the high-voltage circuit breaker is measured by a voltage meter; resistance values of both ends of the high-voltage circuit breaker are measured according to the current value and the voltage value; voltage and current are obtained by establishing a coordinate system; two catastrophe points of a voltage curve and a current curve are found out when a main contact is separated and an arc contact is separated; and a time difference of the two catastrophe points is calculated, so that the breakage of the arc contact can be calculated. The method which is convenient in operation and reliable in detection structure, and used for detecting the electrical state of the high-voltage circuit breaker is realized.

Description

technical field [0001] The invention relates to a detection method for a circuit breaker, in particular to a method for detecting the electrical condition of a high-voltage circuit breaker. Background technique [0002] The electrical life of a high-voltage circuit breaker mainly includes the conduction performance and breaking performance of the high-voltage circuit breaker. At present, the conduction performance of high-voltage circuit breakers is usually judged by the measurement results of DC resistance; the breaking performance is usually judged by the cumulative breaking current, but due to the uncertain current phase when breaking, and the ablation process of the arc contact It is very complicated, so the calculation of the cumulative breaking current effective value of the high-voltage circuit breaker cannot truly reflect the breaking performance of the high-voltage circuit breaker. [0003] The contacts of high-voltage circuit breakers include main contacts and arc...

AI Technical Summary

Problems solved by technology

[0004] When the high-voltage circuit breaker repeatedly breaks the current, it will cause the burning of the arc contact. It has been confirmed by relevant tests that only the cumulative breaking current of the high-voltage circuit breaker can be used to judge the burning of the arc contact, and the circuit break can be calculated through its life curve. The remaining life of the device is not reliable, and there is no research and discussion on this project in actual use and various literatures

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