Breaker overload testing device and operation method thereof

Abstract

The invention relates to a breaker overload testing device and an operation method thereof and relates to a testing device for circuit breakers. The testing device comprises a control part and an execution part. The control part comprises a single-chip microcomputer, operating software, a current transformer, a high current generator, a current conditioning circuit, a direct-current motor intelligent control circuit, a current conversion ratio intelligent switching circuit, a man-machine interaction circuit and a touch screen, wherein the operating software are stored in the single-chip microcomputer. The execution part comprises an electric voltage regulator and a relay. The operation method of the breaker overload testing device includes: using the single-chip microcomputer as a core to form the control part; acquiring test current passing a breaker in real time by an acquisition program; monitoring current change in real time and performing logical judgment; and when power grid voltage fluctuates or the required test current changes, allowing the single-chip microcomputer to drive the electric voltage regulator to rotate so as to enable the test current of the tested breaker to satisfy test conditions. Therefore, the defects that the test conditions fail to be changed optionally and test accuracy fails to be guaranteed are overcome.

Description

technical field [0001] The technical solution of the invention relates to a circuit breaker testing device, in particular to a circuit breaker overload testing device and its operating mode. Background technique [0002] With the rapid improvement of the national economy and people's living standards, the electrification and automation of industrial enterprises have increased, and the role of protective electrical appliances has become more and more important. Circuit breakers are protective electrical appliances, mainly used in household and power distribution line terminals. When electrical equipment is overloaded or short-circuited, the circuit breaker can automatically cut off the fault to protect electrical equipment and personal safety. And its reliability directly affects whether the low-voltage power distribution system can operate normally and is closely related to the daily life of thousands of households, so the research on circuit breaker overload test has been w...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the design structure of the circuit breaker current overload characteristic detection device is relatively complicated, the development workload is large, the cost is high, and there is no real-time display during the test process, and the overload test current at this time cannot be known at all times, and when the grid voltage occurs After fluctuations or changes in the environment, the overload test current cannot be adjusted in real time, which will lead to inaccurate test current and test results, which greatly affects test efficiency, speed and test accuracy

Images