Cable line fault monitoring circuit based on double coils

A cable line and fault monitoring technology, applied in the direction of fault location, electromagnetic wave system, etc., can solve the problems of affecting the working life of the cable fault indicator and the large power consumption of the fault indicator

Inactive Publication Date: 2015-09-09
AEROSPACE SCI & IND SHENZHEN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is determined that the power consumption of the fault indicator is very large. Usually, the control device is powered by batteries and needs to be filled with waterproof treatment. After filling, the battery cannot be replaced, but in fact, due to the characteristics of the leakage current of the battery itself, the actual life will be longer than the theory. The value should be small, and it is also greatly affected by the environment, which affects the working life of the cable-type fault indicator

Method used

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  • Cable line fault monitoring circuit based on double coils
  • Cable line fault monitoring circuit based on double coils
  • Cable line fault monitoring circuit based on double coils

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Embodiment Construction

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes ...

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Abstract

The invention relates to a cable fault monitoring circuit based on double coils, which determines which one selected from an electric power acquiring module and an emergency power supply supplies electric power to a control module through detecting a load current on a cable line. Particularly, when the load current is larger than a rated value, the electricity acquiring module performs online electric power acquiring for supplying power to the control module; and when the load current is smaller than the rated value, the emergency power supply supplies electric power to the control module. Therefore, electric power acquisition is simultaneously performed by the electric power acquiring module and the emergency power supply, thereby reducing power supply amount of the emergency power supply, prolonging power supply time of the emergency power supply, furthermore prolonging service life of the whole circuit, and furthermore reducing power consumption of the circuit.

Description

technical field [0001] The invention relates to a cable line fault monitoring technology, in particular to a cable line fault monitoring circuit based on a double coil with a simple power-taking method and a longer service life. Background technique [0002] The cable-type fault indicator is installed on the busbar of the power distribution switch. According to the functional module, it is mainly composed of two parts: a current transformer and a control device. It is mainly used to judge the short-circuit fault or ground fault of the power distribution cable line. If a short circuit or ground fault occurs on the cable line, the control device will judge according to the current status detected by the current transformer and send corresponding information data to the indicator panel or communication terminal. According to the fault working principle, the sensor of the fault indicator needs to monitor the current on the cable line in real time. Therefore, it is determined th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08H02J17/00
Inventor 王国罡
Owner AEROSPACE SCI & IND SHENZHEN GROUP
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