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On-line fault monitoring method and device for drop-out fuse

A drop-out fuse and fault monitoring technology, which is applied in measuring devices, circuit breaker testing, circuit devices, etc., can solve the problems of missed and false alarms of online fault monitoring sensors, and achieve convenient remote transmission or centralized management. Good scalability and fewer components

Pending Publication Date: 2018-12-07
山东卓尔电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, it is found that when the fuse has been blown but is not in the "drop" state due to some reasons, the mercury switch of the online fault monitoring sensor will not send a signal, so that the entire online fault monitoring sensor has "leakage". The phenomenon of "reporting" and "false reporting" exists, which has a certain adverse effect on the normal operation of the entire power grid system and the rapid judgment of fault points

Method used

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  • On-line fault monitoring method and device for drop-out fuse
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  • On-line fault monitoring method and device for drop-out fuse

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] figure 1 Among them, the technical solution of the present invention provides a method for online fault monitoring of drop-out fuses, and its invention points are:

[0042] On the melting tube of the fuse, set a mercury switch to monitor whether the position of the melting tube changes;

[0043] On the fuse tube of the fuse, a magnetic induction coil is set in the suit to monitor whether there is current flowing through the fuse on the fuse tube;

[0044] Logically compare the output signal of the mercury switch with the output signal of the magnetic induction coil;

[0045] Assuming that the mercury switch is "on" signal when the drop-out fuse is in the normal position, and the mercury switch is "off" signal when the drop-out fuse is in the dropped position, then:

[0046] If the mercury switch output is "on" and the magnetic induction coil o...

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Abstract

The invention relates to an on-line fault monitoring method and device for a drop-out fuse, and belongs to the field of emergency protection devices. According to the invention, a fuse tube of the fuse is provided with a mercury switch, and the fuse tube of the fuse is provided with a magnetic induction coil in a sleeved manner; logical comparison is performed on an output signal of the mercury switch and an output signal of the magnetic induction coil; and the position of the fuse tube of the fuse and whether there is current flowing through a fuse wire of the fuse tube or not are simultaneously detected so as to serve as a logical judgment basis for whether the drop-out fuse has a fault or not, thereby being capable of reflecting the actual operating state of the drop-out fuse more authentically and more accurately, fundamentally avoiding the possibility of a missed alarm and a false alarm, and providing more reliable help to the normal operation of the whole power grid system and rapid judgment of fault points. The on-line fault monitoring method and device can be widely applied to the fields of on-line fault monitoring and operation management for various drop-out fuses.

Description

technical field [0001] The invention belongs to the field of emergency protection devices, in particular to an online fault monitoring method and device for drop-out fuses. Background technique [0002] Dropout fuse (commonly known as dropout switch) is the most commonly used short-circuit protection switch in power systems with a rated voltage of 35kV and below. It is usually installed on the high-voltage side of the distribution transformer or on the distribution branch line. It can be used in conjunction with isolating switches to replace automatic air switches; it can also be used in conjunction with load switches to replace expensive circuit breakers. At the same time, it also has short circuit protection, overload and isolation circuit. It has the characteristics of economy, convenient operation, and strong adaptability to outdoor environments. It is widely used in power systems of 35kV and below and the primary side of distribution transformers for protection and equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/07G01R31/327H02J9/04G08C17/02G01R31/74
CPCH02J9/04G08C17/02G01R31/327G01R31/74G01R31/50
Inventor 张振功
Owner 山东卓尔电气有限公司
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