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1. (WO1998049695) ELECTRIC COUPLING DEVICE, ELECTRIC CIRCUIT AND METHOD IN CONNECTION THEREWITH

Pub. No.:    WO/1998/049695    International Application No.:    PCT/SE1998/000680
Publication Date: Fri Nov 06 00:59:59 CET 1998 International Filing Date: Wed Apr 15 01:59:59 CEST 1998
IPC: H01C 7/00
H01C 10/10
H02H 9/02
Applicants: ABB AB
BERNHOFF, Hans
ISBERG, Jan
BREDER, Henrik
JONSSON, Lars
VALDEMARSSON, Stefan
LILJESTRAND, Lars
Inventors: BERNHOFF, Hans
ISBERG, Jan
BREDER, Henrik
JONSSON, Lars
VALDEMARSSON, Stefan
LILJESTRAND, Lars
Title: ELECTRIC COUPLING DEVICE, ELECTRIC CIRCUIT AND METHOD IN CONNECTION THEREWITH
Abstract:
The present invention relates to an electric coupling device for connecting, disconnecting and/or limiting the current in an electric circuit (101). According to the invention the electric coupling device comprises a variable resistor (102). Its resistance is variable between a very low value corresponding to conducting state and a very high value corresponding to substantially insulating state. Switching between the states takes place continually and in a very short time. The invention also relates to an electric circuit provided with such an electric coupling device and a method performed in accordance with the function of the electric coupling device.