Digital detecting system for leakage protector and high-precision detecting method

Abstract

The invention discloses a digital detecting system for a leakage protector and a high-precision detecting method. The system comprises a transformer, a voltage regulator, an arc extinction circuit, a load current zero-cross detecting module, a residual current T-type regulating module, a residual current peak detecting module, the leakage protector, a leakage protector load, a load current conditioning and sampling module, a residual current conditioning and sampling module and a sampling processing and control module. According to the digital detecting system for the leakage protector and the high-precision detecting method, through the adoption of a current zero-cross voltage regulating technology of an electronic contactless type SSR and the combination of a voltage regulation and arc extinction circuit, the erosion degree of a tap by electric arcs in a voltage regulating process can be weakened effectively; digital current regulation of residual currents is achieved through a T-type network and an SSR array, and the defects that a simulation current regulating method is poor in precision and reliability and the like are overcome; detection precision is improved through a high pass capacitance and resistance detecting scheme of current peak time points; a digital framework detection system has the advantages of being high in efficiency, precision and 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...

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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.

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