Digital detection system and high-precision detection method of earth leakage protector

Abstract

The invention discloses a digital detection system and a high-precision detection method of a leakage protector. The system includes a transformer, a voltage regulator, an arc suppression circuit, a load current zero-crossing detection module, a residual current T-type current regulation module, and a residual current peak value detection module. module, leakage protector, leakage protector load, load current conditioning sampling module, residual current conditioning sampling module, sampling processing and control module. The invention adopts the current zero-crossing voltage regulation technology of the electronic non-contact SSR, combined with the voltage regulation and arc suppression circuit, which can effectively weaken the degree of ablation of the tap by the arc during voltage regulation; the T-shaped network and the SSR array realize the digital regulation of the residual current. flow, which solves the shortcomings of poor accuracy and poor reliability of the analog current regulation method; the high-pass capacitive resistance detection scheme at the time point of the current peak value improves the detection accuracy; the detection system of the digital architecture has the characteristics of high efficiency, high precision and high reliability.

Description

technical field [0001] The invention belongs to the detection technology category of leakage protectors, in particular to a digital detection system and a high-precision detection method of leakage protectors. Background technique [0002] Thousands of people die every year due to electric shock in our country, and the economic loss caused by electric leakage is hundreds of millions of yuan; the leakage protector is an effective device to prevent electric shock injury, electric leakage fire, and electrical equipment damage. The residual current action protector defined by IEEE is referred to as residual current protector. In my country and Japan, it is called earth leakage protector. In Europe, it is earth leakage circuit breaker (ELCB). In the United States, the term is ground fault circuit breaker (GFCD). . The national standard points out that the leakage protector refers specifically to "a mechanical switching device or combined electrical appliance that can automaticall...

AI Technical Summary

Problems solved by technology

[0015] The above beneficial explorations have proposed the architecture and detection methods of the leakage protector detection system, which has certain reference value, but the results of the exploration are still limited.

Images