Control method of grounding wire current locking type electric leakage protector

Abstract

The invention relates to the field of an electric leakage protector, in particular to a control method of a grounding wire current locking type electric leakage protector. The control method involves a detection loop, an electronic switch I, an electronic switch II, an electric leakage protection chip U2, an electric leakage protection chip U3, a grounding wire live-line detection module, a grounding wire voltage unlocking module, a grounding wire live-line indication lamp module and a temperature protection switch. The control method has the beneficial effects that the problem of non-locking error tripping is solved by the control method of the grounding wire current locking type electric leakage protector, and the auxiliary cost brought by installation insulation needed for a non-locking type three-level electric leakage and breakage protector used for matching of the whole machine is reduced. According to the control method, the grounding wire current protection function is automatically opened and closed by automatically detecting the size of a voltage of an Ei-Ni end of a plug, the problem of a large amount of customer complaints caused by a power utilization environment in the market is solved, moreover, the industry of the electric leakage protector is introduced to a new field of intelligent control, and the electric leakage protector is safer and more humanized.

Description

technical field [0001] The invention relates to the field of earth leakage protectors, in particular to a control method for earth wire current locking type earth leakage protectors. Background technique [0002] Existing earth leakage protectors are divided into two-pole breaker and three-pole breaker products, of which two-pole breaker products are only suitable for zero-sequence leakage protection. Because the market power environment cannot ensure reliable grounding, two-pole breaker products are not safe when used. However, when the three-pole breaker product is reliably grounded, the ground wire current of the socket and the electrical appliance form a closed-loop current circuit when the terminal is reliably grounded, causing frequent tripping of the three-pole breaker product, resulting in the failure of the normal use of the electrical appliance (such as gas water heater). In order to solve the above problems, the present invention proposes that when there is relia...

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Problems solved by technology

[0002] Existing earth leakage protectors are divided into two-pole breaker and three-pole breaker products, of which two-pole breaker products are only suitable for zero-sequence leakage protection. Because the market power environment cannot ensure reliable grounding, two-pole breaker products are not safe when used. However, when the three-pole breaker product is reliably grounded, the ground wire current of the socket and the electrical appliance form a closed-loop current circuit when the terminal is reliably grounded, causing frequent tripping of the three-pole breaker product, resulting in the failure of the normal use of the electrical appliance (such as gas water heater)

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