A Method for Evaluating the Mechanical Characteristics of Circuit Breakers
A technology of mechanical characteristics and circuit breakers, which is applied in the field of evaluation of mechanical characteristics of circuit breakers, can solve the problems of no circuit breaker refinement criteria, inability to accurately judge circuit breaker mechanical characteristics, and rough criteria
Active Publication Date: 2019-02-01
CHINA XD ELECTRIC CO LTD
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Problems solved by technology
[0003] At present, many online or offline mechanical characteristic testing devices have appeared, and there is basically no problem in obtaining the mechanical characteristic curve of the circuit breaker. However, how to judge whether the mechanical characteristic curve of the circuit breaker is qualified or not is basically based on the content in GB1984. The criteria given by the standard are relatively rough, and there is no detailed criterion based on the voltage level of the circuit breaker, the operating mechanism, the internal structure of the circuit breaker, etc., and it is impossible to guide technicians to accurately judge the mechanical characteristics of the circuit breaker
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[0029] The present invention is described in further detail below in conjunction with accompanying drawing:
[0030] Such as figure 1 As shown, a method for evaluating the mechanical characteristics of a circuit breaker can be summarized as the following steps:
[0031] Step S100, during the mechanical life test of the circuit breaker, monitor and record the stroke curve of each operation; since the type test of the circuit breaker includes the requirements for the mechanical life test, according to the national standard, for an M1 class circuit breaker, it is required to meet 2000 operations cycle, for M2 class circuit breakers, it is required to meet 10,000 operating cycles. Therefore, the stroke curve data of each action can be recorded while doing the mechanical life test. The schematic diagram of circuit breaker travel curve is as follows: figure 2 As shown, in order to facilitate the description of circuit breakers with different strokes of different models, the stro...
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The invention provides a circuit breaker mechanical characteristic evaluation method which mainly comprises the following steps: during a circuit breaker mechanical life experiment, a stroke curve of each operation is monitored and recorded, a stroke value of a certain time on all stroke curves is obtained, a discrete series is formed, a probability distribution type of the discrete series is analyzed, a reasonable threshold range of the stroke value at the time is determined according to the probability distribution type of the discrete series, the above processes are repeated, stroke threshold ranges at different times during circuit breaker action processes are obtained, circuit breaker mechanical characteristic evaluation criteria are determined based on relevant standards and the stroke threshold ranges at different times, and whether circuit breaker mechanical characteristics are abnormal can be further determined.
Description
【Technical field】 [0001] The invention relates to the field of electrical equipment maintenance and guarantee, in particular to a method for evaluating the mechanical characteristics of a circuit breaker. 【Background technique】 [0002] The circuit breaker is the key equipment in the transmission network, and its operating status is directly related to the safe and reliable operation of the entire power grid. With economic development and social progress, my country has put forward higher requirements for the capacity and quality of electricity consumption. , so that the use of circuit breakers is also increasing. The survey shows that the mechanical failure of the circuit breaker operating mechanism accounts for a considerable proportion of all failures, so both the manufacturer and the user regard the mechanical characteristic test of the circuit breaker as an important test content. [0003] At present, many online or offline mechanical characteristic testing devices have...
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IPC IPC(8): G01M13/00G01R31/327
CPCG01M13/00G01R31/3271
Inventor 成勇李锐鹏骆虎武星王瑜李劭頔曾创
Owner CHINA XD ELECTRIC CO LTD