Contact assembly for low-voltage circuit breakers with a two-arm contact lever

US4649247A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Bernhard Preuss · Berlin, DE
• Karl-Heinz Manthe · Berlin, DE

Key dates

• Filing date: Aug 20, 1985
• Grant date: Mar 10, 1987
• Expiry date: Aug 20, 2005

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H2001/223
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A contact assembly is provided for current-limiting low-voltage circuit breakers. The contact assembly has a two-armed contact lever swivel-mounted on a central bearing pin whose lever arms are equipped at their ends with contact pieces. The contact lever is equipped with a slot for mounting on the bearing pin whose longitudinal axis extends approximately at a right angle to the longitudinal axis of contact lever. The contact lever has a stop extending at approximately a right angle to its longitudinal axis for a catch swivel-mounted on the bearing pin. The contact forces on both lever arms cannot be influenced by the swivel mount or by the drive mechanism of the contact lever, but are determined exclusively by the biasing springs.