Protection property testing device of miniature circuit breaker and running method thereof

Abstract

The invention relates to a protection property testing device of a miniature circuit breaker. The device is characterized by comprising a monitor, a host, a keyboard, a mouse, a test control circuit, a test current generation circuit and a voltage and current conversion circuit, wherein the host is respectively connected with the monitor, the keyboard and the mouse to form a standard industrial personal computer, the host is sequentially connected with the test control circuit, the test control circuit, the test current generation circuit and the voltage and current conversion circuit, and the voltage and current conversion circuit is connected with the host of the industrial personal computer. The protection property testing device of the miniature circuit breaker has the advantages that the voltage and current of the miniature circuit breaker can be recorded in real time and at high speed (with sampling rate more than 4 microseconds), the recording collection start time is controlled by the industrial personal computer, and the collection finish time is controlled by touch head state.

Description

technical field [0001] The invention belongs to a protective characteristic testing device in the field of low-voltage electrical appliances, and relates to a small circuit breaker testing device which can complete the protective characteristic test. Background technique [0002] Miniature circuit breakers are often used as air switches for household appliances. It is required to break the contacts and cut off the circuit in time when overload, short circuit and other faults occur, so as to protect the electrical appliances. It is difficult to monitor the real-time protection characteristics of miniature circuit breakers in real life. When the protection characteristics of miniature circuit breakers degrade seriously, over-protection or under-protection faults may occur, which will affect the safety of residents' electricity consumption. Although the rapid development and popularization of smart grids, especially the widespread use of smart meters, provides a platform for re...

AI Technical Summary

Problems solved by technology

Among the test devices related to the protection characteristics of circuit breakers, "circuit breaker instantaneous protection characteristic detection current generation device" (patent application number CN201220708626.4) mainly involves the detection of circuit breaker instantaneous protection characteristic current, "vacuum circuit breaker vacuum degree monitoring System" (Patent Application No. CN200820220646.0) mainly involves the monitoring of vacuum degree of vacuum circuit breaker, "circuit breaker contact electric life monitoring device" (patent application No. CN01239795.4) mainly involves the monitoring of circuit breaker Circuit breaker protection characteristic tester" (patent application number CN200920171269.0) mainly involves the test of the protection characteristic of the low-voltage constant current source circuit. It is impossible to test the online protection characteristics of miniature circuit breakers

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