Electric network ground montior

A monitor and power grid technology, applied in the direction of electrical components, circuit devices, emergency protection circuit devices, etc.

Inactive Publication Date: 2010-05-12
于世根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2. The installation support of the power grid is the earth
3. Most grid faults are related to grounding
[0003] In-situ return-to-zero type leakage protection technology (another case has been reported and obtained a patent right, patent number ZL00207947. Patent right, patent number ZL01231175.8, name: network ground insulation monitoring device), designed and implemented a set of solutions to solve the above problems, but encountered some new problems in product development and a certain amount of long-term trial , there is still a lot of room for further technical improvement and perfection

Method used

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Embodiment Construction

[0039] Fig. 2 is one of principle circuit diagram of the present invention, and it is a kind of principle circuit diagram of common type total monitor. It is mainly based on monitoring and alarming, and also has a control action or remote monitoring interface. Only one total monitor is required in a low-voltage power supply system. Its main functions are: 1. Form a channel for collecting grounding information (when the power grid is grounded) through the general monitor. 2. Pulse the grounding current of the power grid to greatly reduce its effective value, so as to reduce leakage loss and enhance the safety of power supply and use. 3. The sub-monitor can get enough grid grounding information, so that the sub-monitor can work reliably. 4. To monitor the grounding of the entire power grid. If there is a grounding anywhere in the monitored low-voltage power grid, it will alarm or even control the power failure. 5. It can also use sound and light signals to display the fuse of...

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Abstract

This invention provides an electric net earthing monitor, in which, the monitor system is composed of a general monitor and several sub-monitors, the earth information test channel is composed of a back-flow isolation diode, a back-flow control circuit, earth terminals and a mutual-inductor, the back-flow control circuit in the general monitor controls an alarm circuit and an action circuit at thesame time.

Description

1. Technical field [0001] The invention relates to the field of electric power supply control devices, in particular to a power grid grounding monitor. 2. Background technology [0002] The low-voltage power grid has the following basic facts: 1. Compared with the medium and high-voltage power grids, the low-voltage power grid has the longest line, the widest distribution, the most chaotic layout, the most difficult management, the largest loss, and the most accidents. 2. The installation support of the power grid is the earth. 3. Most grid faults are related to grounding. 4. Personal electric shock grounding is much less than grid grounding caused by other reasons. Based on these basic facts, we can make the following inferences: over time, the occurrence of grounding in the power grid is inevitable. Simultaneous grounding of different lines in the same network is the problem of low-voltage power grids. Grounding is the culprit of power grid loss and accidents. It is the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/32H02H3/14
Inventor 于世根于淼清李振良
Owner 于世根
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