Overvoltage protection arrangement consisting of a horn spark gap accommodated in an insulating housing

US11152769B2 · kind B2 · utility

Inventors

• Helmut Hirschmann · Farchach, DE
• Georg Wittmann · Herzogenaurach, DE
• Edmund Zäuner · Berching, DE
• Ralph Brocke · Ilmenau, DE
• Sebastian Haas · Forchheim, DE

Key dates

• Filing date: Jan 30, 2019
• Grant date: Oct 19, 2021
• Expiry date: Jan 30, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H2085/0486
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to an overvoltage protection arrangement consisting of a horn spark gap accommodated in an insulating housing (1) having a deion chamber. A trigger electrode is located in the ignition area of the horn spark gap. A varistor is also present, electrically connected in series to the horn spark gap. According to the invention, a first and a second disconnection apparatus are formed in the housing, wherein the first disconnection apparatus (2) is in heat-conducting connection with the varistor and, when a limit temperature is reached or exceeded, releases a spring-loaded slide (3) which interrupts the series connection between varistor and horn spark gap. Furthermore, the second disconnection apparatus (13) comprises a fusible conductor which is located inside the deion chamber, for example, and can be exposed there to an arc, wherein the fusible conductor holds a spring-loaded disconnector element (14) in a first position and releases this disconnector element (14) when fused as a result of the effects of the arc in such a manner that the disconnector element (14) adopts a second position, wherein an electrical connection to the trigger electrode is interrupted wh…