Busbar current leakage detection apparatus with input protection

A leakage current detection and protection circuit technology, used in measuring devices, only measuring current, measuring current/voltage, etc., can solve the problems of small busbar leakage current, large size, and surge pulse damage.

Inactive Publication Date: 2016-09-21
STATE GRID CORP OF CHINA +1
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  • Abstract
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Problems solved by technology

[0003] However, the leakage current of the busbar is very small and has a large variation range, which brings great difficulties to the detection work. In addition, the circuit volume of the current busbar leakage current detection device is relatively large, the production cost is high, and the stability is relatively low. Poor; moreover, the precision components in the electronic circuits of many busbar leakage current detection devices are often damaged by various surge pulses

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  • Busbar current leakage detection apparatus with input protection

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Embodiment Construction

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, rather than all embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work, all belong to the protection scope of the present invention .

[0017] figure 1 A schematic diagram of the circuit structure of a busbar leakage current detection device with input protection provided by an embodiment of the present invention, as shown in figure 1 As shown, the bus leakage current detection device includes a photoelectric isolation circuit 1, a protection circuit 6, an amplifier circui...

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Abstract

The invention belongs to the technical field of busbar monitoring, in particular to a busbar current leakage detection apparatus with input protection. The technical problem to be solved by the invention is to provide a busbar current leakage detection apparatus which has small-sized circuits, can be manufactured at a low cost and provides highly stable performances. The apparatus comprises a photoelectric isolation circuit, an amplifying circuit, a wireless transmitter and a controller wherein the photoelectric isolation circuit includes an optical-coupler (A1), a resistor (R1), a resistor (R2) and a diode (D1). The amplifying circuit comprises an instrument amplifier (B1), a resistor (R3), a resistor (R4) and a resistor (R5). The invention can find applications in an electric power department.

Description

technical field [0001] The invention belongs to the technical field of busbar monitoring, in particular to a busbar leakage current detection device with input protection. Background technique [0002] The bus bar is made of high-conductivity copper or aluminum material, and is used for the main wire of the power station or substation to transmit electric energy. Through it, the electric energy output by the generator, transformer or rectifier can be transmitted to various users or other substations. . During the operation of the busbar, a huge amount of electric energy passes through, and when it is short-circuited, it bears a large amount of heat and electrodynamic effects. The outermost layer of the high-current busbar is provided with a shielding layer, which is connected to the earth, thus ensuring the shielding layer and The ground has the same potential, which can ensure the safety of personnel and equipment in case of accidental contact. If there is a problem with ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02G01R19/00
CPCG01R19/0092G01R31/50
Inventor 郑强崔俊峰贾多斌宋志勇边小军孟丹王铁铸宋丽芳赵莉莉赵淑芬
Owner STATE GRID CORP OF CHINA
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