A Neutral Point and Shell Double Grounding System for Transformer

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

Active Publication Date: 2016-03-02
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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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  • A Neutral Point and Shell Double Grounding System for Transformer
  • A Neutral Point and Shell Double Grounding System for Transformer
  • A Neutral Point and Shell Double Grounding System for Transformer

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Embodiment Construction

[0015] 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:

[0016] Such as figure 1 with 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 ...

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Abstract

The invention relates to a double grounding system for a neutral point and an outer shell of a transformer. Compared with the prior art, the grounding point of the transformer is easily corroded or disconnected, thereby causing major safety hazards. The invention includes a transformer, a grounding flat iron and a current transformer, the grounding flat iron is fixed and vertically installed on the grounding device, the neutral point of the transformer is connected with the current transformer, and the current transformer and the copper wire nose B of the grounding flat iron pass through The neutral point grounding wire is connected, and the grounding point of the transformer casing is connected to the copper wire nose A of the ground flat iron through the transformer casing grounding wire. The distance between copper wire nose A and copper wire nose B is 60mm, and the copper wire nose A and copper wire nose B are connected by wiring, and the specification of wiring is BVR35. The invention ensures that the effective grounding can continue to be maintained after a grounding terminal is corroded and disconnected.

Description

technical field [0001] 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. Background technique [0002] 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 effects, so that the ...

Claims

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Application Information

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Patent Type & Authority Patents(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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