Patent · US Expired

Method for averaging out overall burn up in an electromagnetic switching device and a corresponding electromagnetic switching device

US6765316B1 · kind B1 · utility

7Cited by

7References

21Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Norbert B. Elsner · Village of La Jolla, US
Gerd Griepentrog · Gutenstetten, DE
Reinhard Herbst · Wernberg-Köblitz, DE
Reinhard Maier · Herzogenaurach, DE
Norbert Mitlmeier · Ursensollen, DE
Diethard Runggaldier · Stegaurach, DE
Christian Schreckinger · Tönning, DE
Bernhard Streich · Amberg, DE

Key dates

Filing date	Apr 8, 2002
Grant date	Jul 20, 2004
Priority date	—
Expiry date	Jan 2, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH01H11/0062
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electromagnetic switching device includes a contact arrangement with three contacts which couple a three-phase load to three phases of a three-phase power supply system, and disconnect the three-phase load from the three phases. Switching erosion takes place on the contacts. An overall erosion is determined for each contact, and is supplied to a drive circuit. The contact arrangement is operated by the drive circuit as a function of the overall erosion such that the overall erosion of the contacts are approximated to one another.

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