(19)
(11) EP 0 918 341 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.08.2000 Bulletin 2000/31

(43) Date of publication A2:
26.05.1999 Bulletin 1999/21

(21) Application number: 98203863.0

(22) Date of filing: 18.11.1998
(51) International Patent Classification (IPC)7: H01F 27/02, H01F 27/04
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 19.11.1997 IT MI972576

(71) Applicant: ABB Trasformatori S.p.A.
20025 Legnano (Mi) (IT)

(72) Inventor:
  • Lanciano, Giovanni
    20025 Legnano (Mi) (IT)

(74) Representative: Giavarini, Francesco 
ABB Ricerca S.p.A. Viale Edison, 50
20099 Sesto San Giovanni (MI)
20099 Sesto San Giovanni (MI) (IT)

   


(54) Electric transformer for high- and very high-intensity currents, particularly for furnaces and rectifiers


(57) An electric transformer for high- and very high-intensity currents, particularly for furnaces and rectifiers, comprising a tank (2) which contains a magnetic core (3) with the corresponding windings (4,5). The low-voltage feedthroughs for high- and very high-intensity currents protrude hermetically from the tank (2). The particularity of the invention is constituted by the fact that at least the portion of the wall of the tank that is affected by the low-voltage feedthroughs is made of aluminum and/or alloys thereof and forms openings for the hermetic passage of the low-voltage feedthroughs.






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