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Transformer lead method

A technology of transformers and lead wires, which is applied in the field of transformers and can solve problems such as unqualified transformers

Pending Publication Date: 2022-05-31
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the above adjustment process, there are still a large number of transformers that are unqualified products

Method used

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  • Transformer lead method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, this embodiment provides a method for leading a transformer. The transformer includes a zero-phase copper bar, and three sets of connection points are evenly arranged on the zero-phase copper bar. One set of connection points includes point x and point a, and the wire drawn from point x is connected to point a. The load is connected, the wire drawn from point a is connected to one of the phases of the coil winding; one of the connection points includes point y and point b, the wire drawn from point y is connected to the load, and the wire drawn from point b is connected to one of the phases of the coil winding One set of connection points includes point z and point c, the wire drawn from point z is connected to the load, and the wire drawn from point c is connected to one of the phases of the coil winding; there is a 0-phase connection point between point b and point c The starting point of phase 0 includes the following steps:

[0037] S1. A f...

Embodiment 2

[0057] This embodiment provides a transformer lead wire method. Compared with Embodiment 1, the basic structure of the transformer lead wire method provided by this embodiment is the same as Embodiment 1. The difference is that in this embodiment, the second copper bar passes through The part at the point c is covered with an insulating protection part, which further improves the safety of the transformer. In this embodiment, the insulating protection member is a heat-shrinkable insulating sleeve. Further, the part where the third copper bar passes through point c is also covered with an insulating protection member.

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Abstract

The invention discloses a transformer lead method, and belongs to the technical field of transformers. According to the transformer lead method, the copper bars between the phases are increased, and the transmission path of the current is increased, so that the resistance of the transformer is improved, and a small resistance value is increased. Other copper bars are additionally arranged on the zero-phase copper bar, so that the current transmission path is prolonged, the sectional area of the conductive structure is increased, and the large resistance is reduced. By means of the arrangement, small resistance can be increased, large resistance can be reduced, and therefore the unbalance rate of the resistance is weakened, and the transformer meets the national standard. According to the transformer lead method, the lengths of the copper bars between the phases are changed for multiple times, the resistance unbalance rate is measured, the transformer is adjusted and screened for multiple times, and the qualification rate of the transformer is increased.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a transformer lead wire method. Background technique [0002] In general, whether the transformer complies with the national standard is taken as an important credential for whether the transformer is put into operation, and the DC resistance unbalance rate of the three-phase winding of the transformer must also meet the requirements of the national standard. The national standard stipulates that the phase resistance unbalance rate is not more than 4%, and the line resistance unbalance rate is not more than 2% to be qualified. However, when the capacity of the transformer is large, the resistance value is small and the specifications of the copper bars are large, so that the resistance unbalance rate often exceeds the specified value of the national standard, which makes the above-mentioned transformer have certain safety hazards in the operation process. [0003] In order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/29H01F41/00G01R27/02
CPCH01F27/29H01F41/00G01R27/02Y02E40/50
Inventor 邹挺周丹朱龙鹏欧立新张敏白禹
Owner GUANGDONG POWER GRID CO LTD