Patent · US Expired

Process and arrangement for selective network monitoring for switchgear

US6373669B1 · kind B1 · utility

2Cited by

10References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Werner Hartmann · Hamburg, DE
Wilfried Haas · Erlangen, DE
Jorg Kieser · Albstadt, DE
Harald Kurzmann · Berlin, DE

Key dates

Filing date	Feb 15, 2000
Grant date	Apr 16, 2002
Priority date	—
Expiry date	Feb 15, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH01H33/66
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In switchgear with superordinate power circuit-breakers and a plurality of subordinate power circuit-breakers, the superordinate power circuit-breaker must be triggered in the event of failure of the subordinate power circuit-breakers. This is accomplished as follows: electrical post-arc currents are detected after current zero, the electrical post-arc currents are compared with a predetermined limit value, and if the limit value is exceeded, a signal is effected for triggering the superordinate power circuit-breaker in the switchgear. This method can advantageously be implemented in particular in the case of vacuum circuit-breakers with at least one vacuum interrupter. The associated arrangement has a device which monitors the subordinate power circuit-breakers and, if appropriate, triggers the superordinate power circuit-breaker.

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