Leakage protector with judgment function

Abstract

The invention discloses a leakage protector with the judgment function. According to the leakage protector with the judgment function, two circuits are arranged and correspond to slowly-varying leakage initiating current and suddenly-varying pulse leakage initiating current respectively, after one-time judgment is conducted on the suddenly-varying current caused by accidents such as large-area leakage before a delay circuit acts, and then the delay circuit acts. Therefore, the leakage protector with the judgment function effectively avoids the phenomenon that simultaneous motion of three-level leakage protectors causes large-area power failure, and is high in safety, sensitivity and rapidity.

Description

technical field [0001] The invention relates to the field of electronic appliances, in particular to a leakage protector with a judging function. Background technique [0002] The realization of modern electrification has promoted the development of productivity. With the wide application of electric power, electrical accidents caused by improper use of electrical equipment or line leakage occur from time to time. In order to protect the safety of life and property, three-level leakage protection has been widely implemented at home and abroad. Research and practice, the relevant departments of our country have also promulgated corresponding regulations. The leakage protector is a kind of electrical equipment that has developed rapidly in recent years to prevent electrical accidents and protect the safety of people and equipment. It is important to conduct research on the reliability of leakage protectors in the electrical industry. an important work. At present, there are s...

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Problems solved by technology

At present, there are still some problems in the safe operation of the three-level protection of rural power grids. The current time-delay type and phase-detection pulse type leakage protectors alone cannot overcome the problem of large-scale power outages caused by the simultaneous operation of the above-mentioned first, second, and third-level leakage protectors. shortcoming

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