Electronic circuit capable of recognizing null line automatically

An electronic circuit and self-identification technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as leakage current exceeding the standard, equipment casing charged, equipment failure, etc.

Active Publication Date: 2017-08-22
智先生电器(江苏)股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But in reality, it often happens that the line is aging or the equipment is faulty, which leads to the wrong contact between the live wire and the neutral wire. Once the wiring is wrong, the leakage current will exceed the standard or the equipment shell will be charged, which will seriously affect the working process of the system. , causing the leakage protector to fail to work properly

Method used

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  • Electronic circuit capable of recognizing null line automatically

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Embodiment Construction

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0021] Refer below figure 1 An electronic circuit for self-identifying neutral wire according to an embodiment of the present invention is described, the circuit includes a live wire J1, a neutral wire J2 forming a loop with the live wire J1, and a protective ground wire J4.

[0022] The live line J1 is connected with an overcurrent protection fuse F1, a step-down circuit composed of a seventh resistor R2 and a first capacitor C1 connected in parallel, and a rectifier circuit. The positive pole of the rectifier circuit is connected to th...

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Abstract

The invention relates to an electronic circuit capable of recognizing a null line automatically. The electronic circuit comprises a live wire (J1), a null line (J2), together with the live wire (J1), forming a loop, a voltage sampling terminal (D) connected to a ground protection line (J4) by a first resistor (R9), a voltage comparison circuit, and a selection circuit. The voltage comparison circuit is used for comparing the voltage of the voltage sampling terminal (D) with a voltage obtained by partial pressure sampling by the electronic circuit; and the selection circuit connected to the output terminal of the voltage comparison circuit is used for selecting a branch circuit where the null line is located based on an output signal of the voltage comparison circuit. Compared with the prior art, the electronic circuit has the following beneficial effects: a null line port can be identified effectively; for special electrical equipment needing null line connection, an effect of identifying a null line can be realized; even when wrong connection between a live wire and a null line occurs, the output terminal of the circuit can be connected with the null line and the live wire correctly; the live wire and the null line can be monitored automatically; and the structure is simple and the effect is obvious.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to an electronic circuit for self-identifying zero line. Background technique [0002] In the industrial field, the working voltage of electrical equipment is often very high. In order to prevent safety accidents caused by line failures and equipment failures, the operator will add a leakage protector to the circuit. When a leakage occurs, the leakage protector will start to trip. The machine is powered off and stops working, thus preventing danger from happening. [0003] But in reality, it often happens that the line is aging or the equipment is faulty, resulting in the wrong contact between the live wire and the neutral wire. Once the wiring is wrong, the leakage current will exceed the standard or the equipment shell will be charged, which will seriously affect the system working process. , causing the leakage protector to fail to work properly. [0004] Therefore, it is nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H11/00
CPCH02H11/004
Inventor 李克飞
Owner 智先生电器(江苏)股份有限公司
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