Patent · US Active

Overvoltage protection element

US8582264B2 · kind B2 · utility

2Cited by

2References

18Claims

0Family size

Assignee

PHOENIX CONTACT GMBH & CO. KG · DE

Inventors

Rainer Durth · Niederheesten, DE
Christian Depping · Lemgo, DE
Thomas Meyer · Ottenstein, DE

Key dates

Filing date	Feb 9, 2011
Grant date	Nov 12, 2013
Priority date	—
Expiry date	Jan 14, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH01C7/126
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An overvoltage protection element with a housing, with at least one overvoltage limiting component which is located in the housing, with terminal elements for electrical connection of the overvoltage protection element to the current or signal path which is to be protected, and with a state display which has a display element for display of the state of the overvoltage protection element. A conclusion about the state of the overvoltage protection element is easily possible as a result of a thermally activatable, endothermic material being both in thermal contact with the overvoltage limiting component and also in mechanical contact with the display element of the state display. When the overvoltage limiting component is heated above a certain minimum temperature, expansion of the thermally activatable, endothermic material produces a change in position of the display element whose magnitude is a measure of the heating of the overvoltage limiting component.

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