Patent · US Expired

Step switch

US5523674A · kind A · utility

7Cited by

11References

13Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Dieter Dohnal · Lappersdorf, DE
Josef Neumeyer · Waldetzenberg, DE
Wolfgang Albrecht · Wenzenbach, DE
Gunter Kloth · Ribnitz-Damgarten, DE
Rolf Lauterwald · Nittendorf, DE
Hans-Henning Lessmann-Mieske · Neutraubling, DE

Key dates

Filing date	Sep 27, 1994
Grant date	Jun 4, 1996
Priority date	—
Expiry date	Sep 27, 2014

Classification

Technology area (CPC H)Electricity
CPC primaryH01H9/0016
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a load selector for step switches in step transformers with two movable selector contacts. A suitable vacuum switch is located downstream of the first movable selector contact to switch the load current and a suitable switch for switching the compensation current is located downstream of the second movable selector contact. Both of the selector contacts are independently movable in such a way that one of the selector contacts moves slowly and the other selector contact rapidly moves or jumps between positions. The sequence of operation of the selector contacts is independent of the switching direction.

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