Patent · US Expired

Switching arrangement for load change-over switches of step switches and for selector switches

US5786552A · kind A · utility

7Cited by

0References

5Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Dieter Dohnal · Lappersdorf, DE
Hans-Henning Lessmann-Mieske · Neutraubling, DE
Josef Neumeyer · Waldetzenberg, DE
Leonhard Pillmeier · Regensburg, DE

Key dates

Filing date	Sep 25, 1996
Grant date	Jul 28, 1998
Priority date	—
Expiry date	Sep 25, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH01H9/0038
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention concerns a switching arrangement for load change-over switches of step switches and for selector switches, wherein two switching contacts movable in two directions are present. The first switching contact is in the form of a main switching contact and is connected to the load derivation by means of a first vacuum switchgear cell. The second switching contact is in the form of a resistance switching contact which is likewise connected to the load derivation by means of a series connection comprising a second vacuum switchgear cell and a transition resistor. Both the main and the resistance switching contacts can be moved independently of one another and without mutual coupling or influence. The main switching contact always reaches the new fixed contact abruptly and independently of the switching direction before the resistance switching contact leaves the previous fixed contact.

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