Method and device for the secure operation of a switching device

US7978036B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Robert Adunka · Sulzbach-Rosenberg, DE
• Peter Hartinger · Pfarrkirchen, DE
• Bardo Koppmann · Feldkirchen-Westerham, DE
• Norbert Mitlmeier · Ursensollen, DE
• Ludwig Niebler · Hemau, DE
• Fritz Pohl · Hemhofen, DE
• Alf Wabner · Amberg, DE
• Norbert Zimmermann · Sulzbach-Rosenberg, DE

Key dates

• Filing date: Dec 22, 2005
• Grant date: Jul 12, 2011
• Expiry date: May 4, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H1/20
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A method and a device are disclosed for the secure operation of a switching device including at least one main contact which can be switched on and off and which includes contact pieces and a displaceable contact bridge, and at least one control magnet which includes a displaceable anchor. The anchor and the contact bridge are actively connected to each other such that the corresponding main contact can be opened or closed when switched on and off. In at least one embodiment, the method includes the following: a) the path difference, which returns the anchor after switching on and off, is recognised, b) devices which are used to open welded main contacts are released by a release device when the recognised path difference exceeds a predetermined value and a specific time duration of time has run out after switching off.