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PT three-time safety device

A safety device and fuse technology, which is applied in the field of electric power engineering, can solve problems such as the inability to realize the logic function of the automatic feeder group, the failure of the switch to be powered on and off, and the safety tube is easily damaged by lightning strikes, so as to avoid permanent faults caused by lightning strikes and provide Three times of protection, to ensure the effect of normal work and use

Active Publication Date: 2021-08-27
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reason is that in the prior art, the automatic feeder group is usually equipped with a voltage transformer (PT) primary fuse. When encountering a strong thunderstorm, the PT primary fuse is particularly vulnerable to lightning damage.
For some automated feeder groups, it has a logic function, and the voltage transformer needs to have voltage for energized closing. However, due to the damage of the PT primary fuse, the line reclosed successfully, resulting in the failure of the energized switch on this section of the line, thus The logic function of the automatic feeder group cannot be realized, which seriously affects its normal use

Method used

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  • PT three-time safety device
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  • PT three-time safety device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 1 to Figure 4 As shown, this embodiment provides a PT three-time safety device, which can be applied to live equipment in mountainous areas prone to severe thunderstorms. The PT three-time safety device includes a safety tube 1, a first safety component 2, a second safety component 3 and a Three insurance components4.

[0043] Among them, the first safety component 2, the second safety component 3 and the third safety component 4 are arranged sequentially from top to bottom in the safety tube 1; a conductor 5 is also arranged in the safety tube 1, and a first contact Point 11, the bottom end is provided with a second contact 12, the first contact 11 is configured to be electrically connected to the protected equipment, the second contact 12 is configured to be connected to the voltage transformer internally, and the first contact 11 passes through in turn The first safety component 2 and the conductor 5 are electrically connected to the second contact 1...

Embodiment 2

[0062] Such as Figure 1 to Figure 4 As shown, this embodiment provides a PT triple safety device, wherein the same or corresponding components as those in Embodiment 1 use the corresponding reference numerals as in Embodiment 1. For the sake of brevity, only the difference between Embodiment 2 and Embodiment 1 will be described. The difference is that in this embodiment, optionally, the PT triple safety device also includes an insulating pad 6, and the first safety component 2 and the second safety An insulating pad 6 is provided between the components 3 and between the second safety component 3 and the third safety component 4 . The insulating pad 6 plays an insulating role on the first guide rod 23 and the second guide rod 33, that is to say, in a natural state, without the elastic force of the first elastic member 22 and the second elastic member 32, the second An insulating cylinder 24 and the first guide rod 23 as well as the second insulating cylinder 34 and the second...

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Abstract

The invention relates to the technical field of electric power engineering, and discloses a PT three-time safety device which comprises a protective tube, a first safety assembly, a second safety assembly and a third safety assembly, a first contact is electrically connected with protected equipment, a second contact is connected with the interior of a PT, and the protected equipment is electrically connected with the PT through the first contact, the first safety assembly, a conductor and the second contact. And the first protection is realized. When the protected equipment is struck by lightning, the first safety assembly is damaged, and at the moment, the protected equipment is electrically connected with the PT through the first contact, the second safety assembly, the conductor and the second contact, so protection for the second time is achieved. When the protected equipment is struck by lightning again, the second safety assembly is damaged, and at the moment, the protected equipment is electrically connected with the PT through the first contact, the third safety assembly and the second contact, so that protection for the third time is achieved. The PT three-time safety device can provide three-time protection for protected equipment, the problem of permanent faults caused by one-time lightning stroke is avoided, and normal work of an automatic feeder group is ensured.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a PT triple safety device. Background technique [0002] With the rapid development of electric power technology and users' demand for electric energy, the requirements for the reliability of power supply are getting higher and higher, and the requirements for the quality of electric energy are also getting higher and higher. Easily damaged by lightning strikes. [0003] The reason is that in the prior art, the automatic feeder group is usually equipped with a voltage transformer (PT) primary fuse. When encountering a strong thunderstorm, the PT primary fuse is particularly vulnerable to lightning damage. For some automated feeder groups, it has a logic function, and the voltage transformer needs to have voltage for energized closing. However, due to the damage of the PT primary fuse, the line reclosed successfully, resulting in the failure of the energized sw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/26H01H85/02H01F38/26H01F27/40
CPCH01H85/26H01H85/0241H01F38/26H01F27/402
Inventor 徐宣谢钦朋刘锦旭陈亦壮张仕昌黄力谭书铭徐碧凤
Owner GUANGDONG POWER GRID CO LTD