Multi-level switch system for power line disconnection protection

A technology of disconnection protection and switch system, applied in the direction of protection reacting to overcurrent, emergency protection device for automatic disconnection, emergency protection circuit device, etc. To achieve the effect of preventing human and livestock electric shock casualties and effective protection

Inactive Publication Date: 2008-01-09
李干伟
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Disconnection of three-phase four-wire low-voltage lines is not uncommon. Strong winds, heavy snow, and aging lines are prone to disconnection, which poses hidden dangers to human and animal safety, especially the disconnection of exposed power lines.
In short, there is no comprehensive and effective protection for low-voltage power line disconnection so far.

Method used

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  • Multi-level switch system for power line disconnection protection
  • Multi-level switch system for power line disconnection protection

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Embodiment Construction

[0011] The present invention will be further described in detail below in combination with the embodiments and with reference to the accompanying drawings: the center of the system is set in the distribution box, which is convenient for centralized management, and the terminals of each system are installed on single-phase lines. Most of the components that make up this system are commercially available, and the three modem-related components can be purchased in the electronic market; the multi-channel analog switch is purchased as CD4053 type, the decoder is 74HCl39 type, and the primary switch is K 1-n , keyboard and display device ZLG can be assembled and obtained from the market, and the central microprocessor MCU is programmed and produced by itself according to functions such as sending and receiving, encoding and decoding, display, key and switch control. The secondary switch QF at the end of the system 1-n It is commercially available, and the terminal microprocessor MC...

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Abstract

The invention is concerned with the multi-level switch system for electric power line breaking protection, to install on the three phase four wire power line, on the three phase line system center with the centralized manager for three phase carrier wave communicating (A) and the level one switch (K1-n), on the single phase line system end with the microprocessor for single phase carrier wave communicating and the level two switch (QF), which are communicating through power line. The system end current detector (2) tests the loading current and the residual current at anytime, and sends the signal to the center or the end level two microprocessor (MCU) that shows in the keyboard display unit (ZCG) for obtaining information on time. The centralized manager (A) can send inquire order to each end in cycle and judging the broken branch by if the end cannot respond on time whilst the level one switch will report automatically to protect the whole system on time.

Description

technical field [0001] The invention relates to a power line leakage protection system, which is a leakage switch protection system for detecting the power line carrier signal and instructing on-off. Background technique [0002] Disconnection of three-phase four-wire low-voltage lines is not uncommon. High winds, heavy snow, and aging lines are prone to disconnection, which poses hidden dangers to human and animal safety, especially the disconnection of exposed power lines. Leakage circuit breakers that have been popularized in recent years can only trip for protection when a broken wire touches the ground to generate a grounding current, and the grounding current reaches the rated operating value set by the online residual current-operated protector. If the broken wire is suspended in the air and does not touch the ground, or if it touches the ground but the grounding current does not reach the rated operating value, it will not have a protective effect. After retrieval, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00H02H3/00H02H3/08H02H3/12H02H5/10
Inventor 李乾伟
Owner 李干伟
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