CH164884A

CH164884A - Intensity transformer for high voltage.

Info

Publication number: CH164884A
Authority: CH
Inventors: Ateliers De Construction Delle
Original assignee: Delle Atel Const Electr
Priority date: 1931-11-21
Filing date: 1932-11-07
Publication date: 1933-10-31

Description

  

  Transformateur d'intensité pour haute tension.    Les transformateurs - d'intensité pour  haute tension comportent généralement une  cuve remplie d'huile dans laquelle plonge le  circuit magnétique portant les enroulements.  Les distances d'isolement à observer entre un  enroulement primaire et la masse conduisent  dans le cas de tensions très élevées, à établir  des cuves de dimensions importantes. La sor  tie du primaire devant être isolée de la cuve  par une borne du type traversée de disjonc  teur, on aboutit à une construction présen  tant les inconvénients d'un encombrement  considérable, en hauteur, de l'ensemble cuve  et borne, et d'une capacité d'huile très im  portante qui augmente dans de fortes pro  portions le prix de revient de l'appareil.  



  La présente invention remédie à ces in  convénients. Elle a pour objet un transfor  mateur d'intensité comportant une     borne-          isolateur    pour l'isolement de l'enroulement à  haute tension et de la matière isolante pour  l'isolement des deux enroulements et se ca-         ractérise    en ce que le circuit magnétique est  disposé de telle manière que l'enroulement à  haute tension se trouve en partie dans la  borne-isolateur, remplie de matière isolante,  à cet effet.  



  Le dessin représente     schématiquement    un  exemple de réalisation de l'objet     de--l'inven-          tion.     



  L'enroulement primaire est représenté par  1; il est disposé en boucle allongée sur la  branche médiane d'un circuit magnétique à  trois branches 2, autour de l'enroulement se  condaire 3 avec interposition d'isolements  convenables.  



  Le circuit magnétique est disposé à l'in  térieur de l'isolateur 4 creux et rempli de  matière     isolante,    à la base de celui-ci, de       telle    sorte que la     @demi-boucle    supérieure du  primaire se trouve dans la borne-isolateur, la       demi-bo.ucle    inférieure plongeant dans la  cuve 5. La hauteur de la borne étant fixée  par la tension du primaire, on voit que la      disposition indiquée permet -de     .n'assigner    à  la cuve qu'une hauteur correspondant à la       demi-boucle    inférieure du     primaire.     



  La disposition décrite se prête à la réali  sation de transformateurs du type traversée.  On substitue, à cet effet, à la cuve du trans  formateur représenté     une    porcelaine identique  à celle qui surmonte la cuve. Le circuit  magnétique est fixé au collier de la traver  sée; l'enroulement primaire en boucle est dis  posé symétriquement par rapport à ce circuit,  l'enroulement secondaire étant concentrique à  l'enroulement primaire ou disposé de     toute     autre façon.



  Intensity transformer for high voltage. High voltage - current transformers generally have a tank filled with oil in which the magnetic circuit carrying the windings is immersed. The isolation distances to be observed between a primary winding and the earth lead, in the case of very high voltages, to the establishment of large size tanks. The outlet of the primary having to be isolated from the tank by a terminal of the feed-through type of a circuit breaker, this results in a construction presenting the drawbacks of a considerable size, in height, of the tank and terminal assembly, and of a very large oil capacity which greatly increases the cost of the device.



  The present invention overcomes these drawbacks. It relates to a current transformer comprising a terminal-insulator for the isolation of the high voltage winding and of the insulating material for the insulation of the two windings and is characterized in that the magnetic circuit is arranged in such a way that the high voltage winding lies partly in the terminal-insulator, filled with insulating material, for this purpose.



  The drawing shows schematically an embodiment of the object of the invention.



  The primary winding is represented by 1; it is arranged in an elongated loop on the middle branch of a magnetic circuit with three branches 2, around the winding condaire 3 with the interposition of suitable insulations.



  The magnetic circuit is arranged inside the hollow insulator 4 and filled with insulating material, at the base of the latter, so that the upper half-loop of the primary is located in the terminal-insulator, the lower half-bo.ucle plunging into the tank 5. The height of the terminal being fixed by the tension of the primary, we see that the indicated arrangement allows -de. not assign to the tank a height corresponding to the half - lower primary loop.



  The arrangement described lends itself to the production of feedthrough type transformers. For this purpose, the tank of the transformer represented is replaced by a porcelain identical to that which surmounts the tank. The magnetic circuit is fixed to the collar of the span; the primary looped winding is arranged symmetrically with respect to this circuit, the secondary winding being concentric with the primary winding or arranged in any other way.

Claims

CLAIM Current transformer for high voltage comprising a terminal-insulator for the isolation of the high voltage winding and of the insulating material for the insulation of the two windings, characterized in that the magnetic circuit is arranged in such a way that the high voltage winding is partially located in the terminal insulator filled with insulating material for this purpose. SUB-CLAIMS: 1 Transformer according to claim. comprising a tank filled with insulating material, characterized in that the high voltage winding lies partly in the terminal-insulator and, partly, in the -cuvette.

Transformer according to claim and sub-claim 1, comprising a high voltage winding, constituted by an elongated loop surrounding the middle branch of a three branch magnetic circuit, characterized in that the latter is arranged at the base of the terminal-insulator and inside it so that the upper half-loop of the high voltage winding emerges inside the terminal-isolator, the lower half-loop dipping into the tank.

3 Transformer according to claim and sub-claim 1, comprising a high voltage rolling consisting of an elongated loop surrounding the middle branch of a three-branched magnetic circuit, characterized in that the latter is disposed at the upper part of the vessel so that the upper half loop of the high voltage winding emerges inside the terminal-insulator, the lower half loop dipping into the vessel. 4 Transformer according to claim.

of the feed-through type, comprising a high-voltage winding constituted by an elongated loop, characterized in that the high-voltage and low-voltage windings are arranged inside two insulator terminals opposite at the base, filled with insulating material, the magnetic circuit being arranged such that the high voltage winding emerges, in part, in each of the two terminals.