Transformer with insertable high voltage conductor

Patent metadata

Field	Value
Publication number	US-10685772-B2
Application number	US-201615159324-A
Country	US
Kind code	B2
Filing date	May 19, 2016
Priority date	Apr 29, 2016
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

An electrical appliance for connection to a high-voltage network has a housing that is fillable with an insulating liquid, in which housing a core with at least one winding is arranged, and a bushing plug-in socket fixed to the housing and a high-voltage bushing insertable into the bushing plug-in socket. The electrical appliance is also able to be used at higher voltages, in that the high-voltage bushing has a fixing section, with which the high-voltage bushing can be fixed to the housing and/or to the bushing plug-in socket and from which the high-voltage bushing extends with a column section in a longitudinal direction over a length L 2 towards a high-voltage terminal. The length L 2 is greater than three meters.

First claim

The invention claimed is:

1. An electrical appliance for connection to a high-voltage network, the electrical appliance comprising:
a housing to be filled with insulating liquid, and a core with at least one winding disposed in said housing;
a bushing plug-in socket fixed to said housing, said bushing plug-in socket including a fixing section for fixing to said housing, a hollow receiving section made of an electrically non-conductive insulating material extending from said fixing section into said housing, a metallic contact part being disposed at a closed tapered end region, and said metallic contact part extending through said insulating material of said receiving section or lengthening said receiving section to said closed end region; and
a high-voltage bushing configured for insertion into said bushing plug-in socket, said high-voltage bushing including a fixing section for affixing said high-voltage bushing to one or both of said housing or said bushing plug-in socket and a column section extending from said fixing section in a longitudinal direction over a length L 2 towards a high-voltage terminal, said length L 2 being greater than three meters.

2. The electrical appliance according to claim 1 , wherein said high-voltage bushing, introduced into said bushing plug-in socket, extends with a plug-in section in the longitudinal direction into said bushing plug-in socket over a length L 1 , said length L 1 being less than 600 mm.

3. The electrical appliance according to claim 1 , which comprises a winding connecting line extending inside said housing and connecting said contact part to said at least one winding of said core.

4. The electrical appliance according to claim 3 , wherein said winding connecting line is provided with a current transformer.

5. The electrical appliance according to claim 1 , wherein said plug-in section of said high-voltage bushing comprises a sheathing of a viscous insulator, and wherein a high-voltage conducting element extends through said sheathing at a free end of said plug-in section.

6. The electrical appliance according to claim 1 , wherein said bushing plug-in socket is one of three bushing plug-in sockets fixed to said housing and said high-voltage bushing is one of three high-voltage bushings each configured for insertion into a respective one of said three bushing plug-in sockets.

Assignees

• Siemens Ag

Inventors

• Ettl Christian

Classifications

• H01F27/04 Primary

  Leading of conductors or axles through casings, e.g. for tap-changing arrangements · CPC title

• H01R33/94

  Holders formed as intermediate parts for linking a counter-part to a coupling part · CPC title

• H01F27/025

  Constructional details relating to cooling · CPC title

• H01F27/12

  Oil cooling · CPC title