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Single-chip-microcomputer-based leakage protection detection system

A technology of leakage protection and detection system, applied in the direction of automatic disconnection emergency protection device, emergency protection circuit device, measuring electricity, etc., to achieve the effect of convenient remote reset

Inactive Publication Date: 2017-11-17
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned leakage protection device can play a good role in protecting a single system, but it has limitations for large and complicated power grid equipment

Method used

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  • Single-chip-microcomputer-based leakage protection detection system
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  • Single-chip-microcomputer-based leakage protection detection system

Examples

Experimental program
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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with specific embodiments.

[0017] Example figure 1 As shown, this embodiment includes live wires, neutral wires and zero-sequence current transformers. The live wires and neutral wires are divided into several groups of branch system units connected in parallel, and each group of branch system units passes through the zero-sequence current transformer. connected to the power ports of system unit 1, system unit 2, and system unit n respectively.

[0018] This embodiment also includes a controller, a first electromagnet K1, a normally open button switch SB, a second electromagnet K2 and a control switch SA; the secondary winding output end of the zero-sequence current transformer is connected to the controller; the The controller is connected to both ends of the winding wire of the first electromagnet K1; the magnetic core of the first electromagnet K1 controls the closing of the normally open butto...

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PUM

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Abstract

The invention relates to a single-chip-microcomputer-based leakage protection detection system comprising a fire wire, a neutral line and zero-sequence current transformers. The fire wire and the neutral line divide a plurality of groups of branch system units connected in parallel; and each branch system unit passes through the zero-sequence current transformer and then is connected with a power port of a system unit. In addition, the detection system also consists of a controller, a first electromagnet, a normally open button switch, a second electromagnet and a control switch. According to the detection system provided by the invention, leakage protection on a small system unit is realized. The controller arranged inside the system is capable of recording leakage time, lasting time of leakage, temperatures before and after leakage, and a humidity change and transmitting the data to a main server wirelessly, thereby providing a base for a data analysis by the main server. With the reset function, a single-chip controller or a touch screen carries out display controlling, so that remote resetting or on-site resetting by a repairing worker becomes convenient.

Description

technical field [0001] The invention relates to the field of leakage protection, in particular to a detection system for leakage protection based on a single-chip microcomputer. Background technique [0002] The commonly used leakage protection device is to pass the live wire and the neutral wire through the zero-sequence current transformer, and then connect the output terminal of the secondary winding of the zero-sequence current transformer to the relay, and the relay is connected to the release. When the circuit is normal, the power supply The current flowing out of the live wire is equal to the current returning from the neutral wire through the load to achieve balance. At this time, the output current of the secondary winding of the zero sequence current transformer is zero; when the system leaks, the current flowing out of the live wire of the power supply is equal to the current flowing from the neutral wire through the load The sum of the current returned by the wir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/32G01R31/02
CPCG01R31/50H02H3/32
Inventor 李新辉王子刚韩绍禹周英杰徐鹏程孟繁贺徐志峰刘为张珂铭李磊靳东一
Owner STATE GRID CORP OF CHINA
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