Patent · US Active

Arrangement for overload protection for overvoltage protection equipment

US9941691B2 · kind B2 · utility

3Cited by

3References

6Claims

0Family size

Assignee

DEHN + SÖHNE GMBH + CO. KG · DE

Inventors

Uwe Strangfeld · Koblenzer Straße, DE
Bernhard Krauss · Burgthann, DE
Michael Waffler · Dresden, DE
Stephan Hierl · Dresden, DE

Key dates

Filing date	Mar 27, 2014
Grant date	Apr 10, 2018
Priority date	—
Expiry date	Sep 12, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH02H9/06
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to an arrangement for overload protection for overvoltage protection equipment that has at least one voltage-limiting element and at least one voltage-switching element, and optionally with a back-up fuse, wherein the voltage-limiting element is in the form of a varistor and the voltage-switching element is in the form of a spark gap and these elements are connected in series. According to the invention, to protect against inadmissible pulsed currents, the voltage-limiting element in the series circuit has a monitoring spark gap, forming a bypass, connected in parallel with it. Furthermore, a monitoring device, e.g. a thermal monitoring device, is provided that bypasses both the monitoring spark gap and the voltage-switching element in the event of ageing effects, inadmissibly high mains voltages and/or low-energy, periodic, high-frequency overvoltages.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.