Patent · US Active

Method for testing the functionality of the electromagnetic tripping of a switch, in particular of a circuitbreaker for low voltages

US8866484B2 · kind B2 · utility

0Cited by

4References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Thomas Driehorn · Berlin, DE
Gerd Muller · Falkensee, DE

Key dates

Filing date	Sep 22, 2011
Grant date	Oct 21, 2014
Priority date	—
Expiry date	Jan 9, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2047/008
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is disclosed for testing the functionality of the electromagnetic tripping of a switch, in particular of a circuit breaker for low voltages, which has switching contacts which are opened with the aid of a tripping shaft, which is held prestressed by a switching mechanism and is unlatched by a tripping magnet which for this purpose has a winding through which a current is sent for tripping. In order to test the functionality with relatively little effort, it is proposed in at least one embodiment that the winding is connected as an inductance in a resonant circuit, the resonant frequency of the resonant circuit is detected, and the functionality of the tripping magnet is assessed on the basis of the detected resonant frequency.

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