Global Patent Index - EP 0957496 A3

EP 0957496 A3 2000-02-23 - Power and/or distribution transformer equipped with on-load tap-changer

Title (en)

Power and/or distribution transformer equipped with on-load tap-changer

Title (de)

Leistungs- und/oder Verteilungstransformator mit Lastumschalter

Title (fr)

Transformateur de puissance et/ou distribution avec changeur de prises en charge

Publication

EP 0957496 A3 (EN)

Application

EP 99201458 A

Priority

IT MI981021 A

Abstract (en)

[origin: EP0957496A2] A power and/or distribution transformer comprising: a tank provided with a magnetic core, high- and low-voltage windings, adjustment windings. insulating partitions made of solid material which are interposed between the high- and low-voltage windings and a dielectric and cooling fluid; an on-load tap changer which comprises: at least one selector which is immersed in a lubricating fluid; at least one diverter switch which comprises arc contacts and a dielectric arc-quenching fluid; characterized in that the dielectric and cooling fluid of the transformer and/or the dielectric and arc-quenching fluid and/or the lubricating fluid of the selector are liquid perfluoropolyethers, and in that the tank and the diverter switch are each provided with a filter for reducing chemically reactive gas species generated by the decomposition of the fluids. <IMAGE>

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

H01F 27/10; H01F 29/04

IPC 8 full level (invention and additional information)

H01F 27/02 (2006.01); H01F 27/12 (2006.01); H01F 27/14 (2006.01); H01F 27/40 (2006.01)

CPC (invention and additional information)

H01F 27/14 (2013.01); H01F 27/02 (2013.01); H01F 27/125 (2013.01); H01F 27/402 (2013.01); H01F 2027/406 (2013.01); H01H 2009/0055 (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 0957496 A2 19991117; EP 0957496 A3 20000223; IT 1299218 B1 20000229; IT MI981021 A1 19991111

INPADOC legal status


2001-05-23 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20000824

2000-11-02 [AKX] PAYMENT OF DESIGNATION FEES

2000-02-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-02-23 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

1999-11-17 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

1999-11-17 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI