BUSHING INSULATOR WITH SHIELDING OF THE ELECTRICAL FIELD, PARTICULARLY FOR MEDIUM AND HIGH-VOLTAGE SWITCHBOARDS

(19)

(11)

EP 0 889 487 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	24.02.1999 Bulletin 1999/08

(43)	Date of publication A2:
	07.01.1999 Bulletin 1999/01

(21)	Application number: 98202137.0

(22)	Date of filing: 26.06.1998

(51)	International Patent Classification (IPC)⁶: H01B 17/26

(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:

01.07.1997 IT MI971558

(71)	Applicant: ABB SACE S.p.A.
	I-24100 Bergamo (IT)

(72)	Inventors:
	Giacomucci, Antonio 20033 Desio (MI) (IT) Volponi, Silvia 20033 Desio (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)	BUSHING INSULATOR WITH SHIELDING OF THE ELECTRICAL FIELD, PARTICULARLY FOR MEDIUM AND HIGH-VOLTAGE SWITCHBOARDS

(57) The present invention concerns a bushing insulator with shielding of the electrical field to be used, for examples, in medium or high-voltage air or gas-insulated switchboards, medium or high-voltage power transformers and reactance, instrument transformers, capacitors and medium and high voltage gas insulated busbar, that comprises a moulding of electrical insulating material enclosing a metal insert for shielding the electrical field.
The bushing insulator of the invention is characterised by the fact that said metal insert comprises at least portions of shape memory material capable to assume a predetermined shape upon thermal stress.

Search report