Patent · US Expired

Switching device

US7151353B2 · kind B2 · utility

1Cited by

8References

6Claims

0Family size

Assignee

ABB AB · SE

Inventors

Sjoerd Bosga · Hagfors, SE
Philip C. Kiaer · Hagfors, SE
Magnus Backman · Hagfors, SE
Mats Svensson · Huskvarna, SE
Per-Olof Thureson · Smedjebacken, SE
Lars Jonsson · Västerås, SE
Freddy Magnussen · Västerås, SE
Per Larsson · Västra Ämtervik, SE
Stefan Valdemarsson · Säter, SE

Key dates

Filing date	Sep 17, 2001
Grant date	Dec 19, 2006
Priority date	—
Expiry date	Feb 13, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2003/266
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for evaluating a condition of a switching device. The switching device includes contact parts, an electric motor and a mechanical coupling device for transforming motion from the electric motor to at least one of the contact parts. A self-diagnostic test is performed on a component of the switching device. The test includes making at least one small movement with the electric motor. A switching device includes contact parts, an electric motor, a mechanical coupling device for transforming motion from the electric motor to at least one of the contact parts, and tester for making self-diagnostic tests, wherein the tester makes small motor movements that are a fraction of a full breaking movement, thereby producing data for evaluating a condition of the switching device.

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