Patent · US Expired

Arrangement for disconnecting branches of a low voltage supply network under short circuit conditions

US5689397A · kind A · utility

6Cited by

2References

12Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Fritz Pohl · Hemhofen, DE
Wilfried Jaehner · Wendelstein, DE

Key dates

Filing date	Sep 25, 1995
Grant date	Nov 18, 1997
Priority date	—
Expiry date	Sep 25, 2015

Classification

Technology area (CPC H)Electricity
CPC primaryH02H3/023
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A single circuit-breaker is provided in the phase conductor, and the bridging circuit is provided on the load side of the single circuit-breaker, and a magnetically driven switching contact closes a bridging current branch leading to the neutral conductor. The bridging circuit conducts a part of the short-circuit current past the magnetic drive and/or the switching contact. A resistor whose resistance value amounts to between 25 and 50% of the value of the smallest load-circuit impedance (L.sub.2, R.sub.2) to be expected, may be provided in the bridging current branch. In such an arrangement, the bridging circuit and the circuit-breaker can form one unit.

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