Global patent index - EP 1052659 A1

EP 1052659 A1 2000-11-15 - MT/LT dry transformer with linear distributed electric field for distribution of electric energy in rural networks

Title (en)

MT/LT dry transformer with linear distributed electric field for distribution of electric energy in rural networks

Title (de)

Mittel- oder Niedrigspannungstrockentransformator mit linear verteiltem elektrischem Feld zur Verteilung von elektrischer Energie für ländliche Netzwerke

Title (fr)

Transformateur MT/BT à isolement sec, à champ électrique linéairement réparti, pour la distribution de l'énergie électrique en milieu rural

Publication

EP 1052659 A1 (FR)

Application

EP 00401081 A

Priority

FR 9905938 A

Abstract (en)

The system provides dry insulation of the transformer with semiconductor coatings controlling voltage distribution. The transformer comprises an isolating cylinder (3) for each of the phases, situated between the low tension winding (2) an the medium tension winding (6). The cylinder (3) is coated on its inner surface with a conductive or semi-conductive layer (4) which held at earth potential. The cylinder is coated on its outer surface with a semi-conductive layer (5) which provides a linear distribution of voltage. The medium tension winding is locally wound around this cylinder outer surface. The medium tension wind (6) has a structure comprising thin discs consisting of the superposition of layers of coils (9) wound in series, so that there an axial distribution of potential.

Abstract (fr)

La présente invention concerne un transformateur électrique MT/BT mono ou polyphasé, à isolement de type sec, destiné à une installation en intérieur ou en extérieur. Le transformateur selon l'invention est caractérisé par le fait qu'il comporte pour chacune de ses phases un cylindre isolant (3) situé entre l'enroulement BT (2) et l'enroulement MT (6), et en ce que ce cylindre (3) est revêtu sur sa surface intérieure d'une couche conductrice ou semi-conductrice (4) portée au potentiel de la terre, et sur sa surface extérieure d'une couche en matériau semi-conducteur répartiteur linéaire de tension (5) sur laquelle est bobiné localement l'enroulement MT (2). <IMAGE>

IPC 1-7 (main, further and additional classification)

H01F 27/28; H01F 27/32

IPC 8 full level (invention and additional information)

H01F 27/28 (2006.01); H01F 27/32 (2006.01)

CPC (invention and additional information)

H01F 27/324 (2013.01); H01F 27/288 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1052659 A1 20001115; EP 1052659 B1 20080813; AT 404984 T 20080815; DE 60039813 D1 20080925; ES 2312326 T3 20090301; FR 2793599 A1 20001117; FR 2793599 B1 20010706

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