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hv device and method of making such device

A high-voltage equipment and head technology, which is applied in the field of HV equipment and manufacturing HV equipment, can solve problems such as increasing the dielectric resistance of the equipment insulation system

Active Publication Date: 2022-07-01
HITACHI ENERGY SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention does not solve the problem of increasing the dielectric resistance of the insulation system of the equipment and therefore does not lead to a possible reduction in overall equipment size

Method used

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  • hv device and method of making such device
  • hv device and method of making such device
  • hv device and method of making such device

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Embodiment Construction

[0022] has in Figure 1-6 An instrument transformer in the form of a current transformer 1 according to the invention presented above consists of a head transformer housing 1a having a head housing cover 2 which is connected to the head housing 1a. Part of the housing base 3 is connected. The inner surfaces of the head case cover 2 and head case base 3 are covered with solid insulating material coatings 2a and 3a, respectively. A core case 4 is provided inside the head transformer case 1a. The outer surface of the core shell 4 is covered with a solid insulating material coating 4a of the same kind as the coatings 2a and 3a. The primary conductor 5 extends through the housing base 3 and the portion of the conductor 5 positioned inside the head housing base 3 is coated with a solid insulating material coating 5a similar to the coating 4a. The core group 6 is positioned in the core shell 4 and is connected to the secondary winding wire 7 which extends through the current trans...

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PUM

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Abstract

The invention relates to HV equipment (1) or (31), in particular HV dry current transformers (1) insulated with insulating gel (22) or voltage transformers (31) insulated with insulating gel (48). The dry HV current transformer (1) contains at least two conductive elements, namely the head transformer cover (2), the head housing base (3), the core shell (4) and the primary conductor (5). In a dry HV current transformer (1), at least one of the conductive elements (2, 3, 4, 5) has a coating (2a, 3a, 4a, 5a) made of a solid insulating material, the coating ( 2a, 3a, 4a, 5a) separate the surface of the conductive elements from the insulating gel (22) and are adapted to confine electron emission from the conductive elements (2, 3, 4, 5) into the insulating gel (22). The voltage transformer (31) comprises a bottom outer casing (32), a bottom support flange (39a), a core (33). In the voltage transformer (31), at least one of the conductive elements (32, 33, 39a) has a coating (32a, 33a, 39c) made of a solid insulating material, the coating (32a, 33a, 39c) making The surfaces of the conductive elements are separated from the insulating gel (48) and are adapted to confine electron emission from the conductive elements (32, 33, 39a) into the insulating gel (48).

Description

technical field [0001] The present invention relates to HV equipment and a method of manufacturing HV equipment, in particular HV dry instrument transformers in the form of current transformers, voltage transformers or combined transformers using gel insulation. Background technique [0002] An electrical device for medium and high voltage transmission and / or distribution lines is known from the US 6235992 patent description, the electrical device having a free volume V subjected to electrical stress and comprising an insulating filler filling the free volume, wherein the insulating The filler includes a compressible silicone-based composition having a volume ranging from 1.01 to 1.2 V under normal conditions at a temperature of 25°C. The silicone-based composition may include hollow compressible plastic microspheres. Silicone-based compositions may also include crosslinkable polysiloxanes and silicone crosslinkers. [0003] Silicone is generally an expensive material and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/32H01F38/26H01F38/30H01F38/36
CPCH01F27/321H01F38/30H01F38/36H01F38/26H01F27/02H01F27/24H01F27/29H01F41/0206H01F41/06
Inventor J.巴纳兹奇克J.奇基维斯基B.亚当齐克L.巴克兹W.维索基M.塔诺维斯基R.赫德朗P.斯约伯格J.奥斯特朗德
Owner HITACHI ENERGY SWITZERLAND AG