Method and device for the secure operation of a switching device

US7760055B2 · 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 20, 2010
• Expiry date: Feb 21, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H73/045
• 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 two main contacts which can be switched on and off and which includes respectively, contact pieces and a displaceable contact bridge, and at least one control magnet which includes a displaceable anchor. The anchor acts upon the contact bridge when it is switched on and off such that the corresponding main contact is opened or closed. At least one embodiment of the inventive method includes the following steps: a) release device for a force element remains in a first state in order to interrupt the main contact as long as the main contacts are closed when switched on and open when switched off, and b) the release device are transferred into a second state if at least the main contact is welded after switching off.