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Neutral point and shell dual ground system for transformers

A technology of neutral point grounding and shell grounding, which is applied in the field of transformers, can solve the problems of potential safety hazards, corrosion or disconnection of transformer grounding points, and achieve the effect of preventing lightning current

Active Publication Date: 2014-06-04
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defect that the grounding point of the transformer is prone to corrosion or disconnection in the prior art, thereby causing major safety hazards, and to provide a double grounding system for the neutral point and the shell of the transformer to solve the above problems

Method used

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  • Neutral point and shell dual ground system for transformers
  • Neutral point and shell dual ground system for transformers
  • Neutral point and shell dual ground system for transformers

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Embodiment Construction

[0021] In order to have a further understanding and understanding of the structural features of the present invention and the achieved effects, the preferred embodiments and accompanying drawings are used for a detailed description, as follows:

[0022] Such as figure 1 and figure 2 As shown, a neutral point and shell double grounding system for a transformer according to the present invention includes a transformer 2 , a grounded flat iron 8 and a current transformer 3 . The grounding flat iron 8 is fixed and vertically installed on the grounding device 6, and the grounding function can be achieved by the grounding flat iron 8. The neutral point of transformer 2 is connected with current transformer 3, such as image 3 As shown, the current transformer 3 is connected to the copper wire nose B82 of the grounding flat iron 8 through the neutral point grounding wire 10, and the neutral point of the transformer 2 is drawn out to the current transformer 3, and then drawn out f...

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Abstract

The invention relates to a neutral point and shell dual ground system for transformers and solves the defect that proneness of transformer ground contacts to corrosion or breaking causes major sources of hidden dangers as compared with the prior art. The system comprises a transformer, ground flat bars, and a current transformer; the ground flat bars are fixedly and vertically mounted on a ground device; a neutral point of the transformer is connected with the current transformer; the current transformer is connected with copper connecting terminals B of the ground flat bars through neutral point ground wires; shell ground contacts of the transformer are connected with copper connecting terminals A of the ground flat bars through transformer shell ground wires; the copper connecting terminals A are 60mm away from the copper connecting terminals B; the copper connecting terminals A are connected with the copper connecting terminals B through cotton covered wires which are BVR35 in specification. The neutral point and shell dual ground system for transformers has the advantages that effective grounding can be maintained even after one ground terminal is corroded and broken.

Description

[0001] technical field [0002] The invention relates to the technical field of transformers, in particular to a double grounding system for a neutral point and a shell of a transformer. [0003] Background technique [0004] my country's rural areas are vast, and the location of rural power grid lines is relatively complicated. In order to prevent lightning damage to distribution transformers during thunderstorm seasons and ensure the safe and stable operation of distribution transformers, power supply companies will implement lightning protection measures for transformers. At present, the lightning protection grounding of rural distribution transformers is generally divided into OP grounding mode and NP grounding mode. But from the point of view of practical application, there are certain deficiencies in these two grounding methods. Especially in areas with high levels of thunder and pollution, the grounding point is prone to corrosion or disconnection due to external ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/00H01R4/66
Inventor 罗新李冬梅龙益辉韩志国徐向阳詹昭李桂霞田维斌
Owner STATE GRID CORP OF CHINA
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