Oil-immersed power transformer

A power transformer, oil-immersed technology, applied in the direction of transformer/inductor coil/winding/connection, circuit, conductive connection, etc., can solve the problems of increasing the space occupied by the transformer, increasing the space occupied by the transformer, and increasing the manufacturing cost, etc. Achieve the effect of reducing current density, saving resources and reducing consumption

Inactive Publication Date: 2016-10-26
龚柱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And increasing the overlap length will increase the amount of busbars, thereby increasing the manufacturing cost
The bolts used for fastening will reduce the electrical clearance or safety distance between conductive parts and non-conductive parts. Large spacing will inevitably cause the transformer to take up more space
How to increase the contact area so that the temperature rise of the connection is low without reducing the electrical gap and without increasing the space occupied by the transformer

Method used

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  • Oil-immersed power transformer
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  • Oil-immersed power transformer

Examples

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Effect test

Embodiment 2

[0066] In the first embodiment, the material of the first columnar part 1 is changed to a copper alloy, and the material of the second columnar part 2 is changed to an aluminum alloy. Since the hardness of the alloy is relatively high, the second columnar part 2 can be placed in a low temperature environment ( 5 degrees) for a period of time (5 minutes), while the first columnar part 1 is stored for a period of time (5 minutes) in a high temperature environment (80 degrees), with the help of the effect of thermal expansion and contraction, the inner diameter of the first columnar part 1 Slightly larger, while the outer diameter of the first columnar part 1 is slightly smaller, and then the second columnar part 2 can be easily assembled into the first columnar part 1. After the assembled connecting column returns to normal temperature, the first columnar part 1 Interference fit with the second columnar part 2 can be realized. The diameter and length of the coupling column discl...

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PUM

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Abstract

The invention discloses an oil-immersed power transformer, belongs to the field of power equipment and particularly relates to the oil-immersed power transformer. A coupling column is arranged at a low-voltage output end of the oil-immersed power transformer; the coupling column is partially embedded into the low-voltage output end and is in interference fit with the low-voltage output end; the coupling column is provided with a conducting first columnar part in interference fit with a power bus; a second columnar part with conductivity is coaxially arranged in the first columnar part; the first columnar part and the second columnar part are in interference fit; and the thermal expansion coefficient of the second columnar part is greater than that of the first columnar part. The transformer disclosed by the invention has the beneficial effects that (1) more conducting area is generated by the same overlapping length, so that the current density is reduced and a low temperature rise of the low-voltage output end is achieved; (2) the usage amount of the bus is reduced and resources are saved; and (3) the electric clearance or the safety distance is increased and the electric safety of equipment is improved.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to an oil-immersed power transformer. Background technique [0002] In the power distribution room of the factory, the low-voltage output end of the oil-immersed transformer is usually directly connected with the power busbar, and the power busbar is directly connected to the low-voltage output end. The connection between the low-voltage output end and the power busbar is usually overlapped. Then tighten with bolts. Such as Figure 8 In the upper half of the upper section, this connection method needs to overlap the busbar and the output end by a certain length, so that the current density of the contact surface can be maintained within a certain range, so that the temperature rise at the connection can meet the relevant standards. In order to reduce the temperature rise at the joint, it is usually necessary to increase the overlapping length of the busbar and the terminal to incr...

Claims

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Application Information

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IPC IPC(8): H01F27/29H01F27/28H01R11/09H01R11/01
CPCH01F27/28H01F27/29H01R11/01H01R11/09H01R4/36H01R11/28H01R25/145H01R4/58H02G5/007
Inventor 龚柱
Owner 龚柱
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