Global Patent Index - EP 1014416 A2

EP 1014416 A2 2000-06-28 - Residual-current device

Title (en)

Residual-current device

Title (de)

Reststromvorrichtung

Title (fr)

Dispositif à courant résiduel

Publication

EP 1014416 A2 (EN)

Application

EP 99204083 A

Priority

IT MI982830 A

Abstract (en)

A residual current device comprising an actuator which is operatively connected to kinematic elements for opening contacts following the detection, by a sensor, of an earth fault current. The actuator comprises a bistable metallic element which is operatively connected to the kinematic elements and to which at least one piezoelectric element is coupled, the piezoelectric element being excited by an electrical signal as a consequence of the detection of the fault current and inducing a movement of the bistable metallic element from a first stable equilibrium position to a second stable equilibrium position. The device further comprises reset elements which are suitable to return the bistable metallic element into the first stable equilibrium position before the contacts close again. <IMAGE>

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

H01H 83/02; H01H 57/00

IPC 8 full level (invention and additional information)

H01H 71/12 (2006.01); H01H 83/02 (2006.01)

CPC (invention and additional information)

H01H 83/02 (2013.01); H01H 71/127 (2013.01)

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 1014416 A2 20000628; EP 1014416 A3 20011212; EP 1014416 B1 20040414; AT 264544 T 20040415; CN 1192411 C 20050309; CN 1258124 A 20000628; DE 69916410 D1 20040519; DE 69916410 T2 20050504; IT 1303666 B1 20010221; IT MI982830 A1 20000626

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