Switch for a brush wear recording circuit

US8084704B2 · kind B2 · utility

Assignee

• ALSTOM Technology Ltd · CH

Inventors

• Bernhard Mark · Waldshut-Tiengen, DE
• Max Hobelsberger · Aesch, CH

Key dates

• Filing date: Apr 24, 2009
• Grant date: Dec 27, 2011
• Expiry date: Jun 25, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H3/16
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A switch for a brush wear monitoring recording circuit for monitoring wear of at least one brush, the switch having an open and a closed state, comprises a fixed part including a switch plate having a switch face and a moving part including a capacitive flag disposed on a brush so as to move the capacitive flag corresponding to a brush wear movement in a brush wear direction and a capacitive plate having a capacitive face, wherein the capacitive face and the switch face are disposed parallel to each other and provide capacitance to the switch, and further wherein the capacitive flag is disposed on the brush so as to bring the capacitive face and the switch face in proximity to each other so as to face each other and increase capacitance, thereby changing the switch state.