Test device for small breaker reliability

Abstract

The reliability test apparatus for small breaker consists of test control cabinet, testee cabinet, great current test cabinet and load cabinet. The test control cabinet includes industrial control computer and contact state detecting circuit; the testee cabinet includes small breaker testee, testee handle operating mechanism, and handle on-off drive circuit; the great current test cabinet include automatic current regulating and testing circuit; and the load cabinet includes the corollary load circuits. The present invention performs automatic test of the handle operation, operating mechanism, contact reliability and instantaneous releaser protection reliability of the small breaker, and is universal.

Description

Technical field: [0001] The invention belongs to a circuit breaker test and detection device, in particular to a small circuit breaker reliability test device for reliability test of electrical products. Background technique: [0002] With the improvement of the electrification of daily life and the development of urban construction, it is more and more popular to use high-performance miniature circuit breakers as overload and short-circuit protection for electrical lines and devices in houses and similar buildings, as well as power distribution terminal circuits and devices. At present, the demand for C45, DZ47 and other series of miniature circuit breakers is increasing rapidly, and the annual output of miniature circuit breakers is also continuously increasing. At present, the annual domestic output has reached more than 100 million poles. Miniature circuit breakers mainly refer to: "AC circuit breakers for AC 50Hz, voltage 380V and below, current 125A and below, and rate...

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a small circuit breaker reliability test device in view of the lack of a test device for reliability testing of small circuit breakers at present.

Solved several key problems in judging the reliability of small circuit breakers: solved the use of industrial computer to realize the automation of reliability test of small circuit breakers, overcome the shortcomings of low precision caused by manual operation and errors caused by human factors; also solved how to Accurately judge the real reliability level of the internal operating mechanism and electrical connection of the miniature circuit breaker during the closing / opening operation, and at the same time solve the problem of simulating the short-circuit current during the detection of the instantaneous protection characteristics of the miniature circuit breaker release Realization and judgment of tripping status and other issues

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