Patent · US Expired

Vacuum switch for the low-voltage range, especially a low-voltage contactor

US4614850A · kind A · utility

8Cited by

5References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Wilfried Kuhl · Wendelstein, DE
Edwin Gemmel · Erlangen, DE

Key dates

Filing date	Nov 30, 1984
Grant date	Sep 30, 1986
Priority date	—
Expiry date	Nov 30, 2004

Classification

Technology area (CPC H)Electricity
CPC primaryH01H33/66261
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A vacuum switch for the low-voltage range, in particular, a low voltage contactor, comprising a vacuum switching tube having a switching chamber and a first contact rigidly arranged therein and a lead-in pin movable relative thereto having a second contact, wherein the vacuum switching tube has an insulating member which is surrounded on the vacuum side at least partially by shielding. The shielding is arranged as a concentric hollow cylinder and the insulating member comprises a ring shaped member, preferably of ceramic. The axial length of the shielding cylinder is at least 1.5 times that of the ring. A vacuum switch having a short insulating path thus can be constructed cost-effectively and which has the capability for a high number of switching cycles.

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