专利名称：Residual-current device
发明人：Mandurino, Pietro,Sciacca, Aldo,Colonna,
Donato,Volponi, Silvia,Bianc, Giuppe
Bertolotto
申请号：EP99204083.2
申请日：19991202
公开号：EP1014416A2
公开日：
20000628
专利内容由知识产权出版社提供
专利附图：
摘要：A residual current device comprising an actuator which is operatively connected to kinematic elements for opening contacts following the detection, by a nsor, of an
earth fault current. The actuator compris 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 conquence of the detection of the fault current and inducing a movement of the bistable metallic element from a first stable equilibrium position to a cond stable equilibrium position. The device further compris ret elements which are suitable to return the bistable metallic element into the first stable equilibrium position before the contacts clo again.
申请人：ABB Ricerca SpA
地址：Viale Edison 50 20099 Sesto San Giovanni (MI) IT
国籍：IT
代理机构：Giavarini, Francesco
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