Patent · US Active

Switchgear for a single-phase motor and a three-phase motor

US9851404B2 · kind B2 · utility

0Cited by

3References

25Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Dirk Hertz · Fichtenhof, DE
Marco Schönenberg · Amberg, DE
Helene Steuer · Nuremberg, DE
Stefan Zitzler · Schwandorf, DE

Key dates

Filing date	Aug 20, 2013
Grant date	Dec 26, 2017
Priority date	—
Expiry date	Apr 7, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P80/15
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An embodiment relates to a switchgear for a single-phase motor and a three-phase motor, the switchgear including a processing unit and a first, second and third current path, the first and third current path each including a current transformer. The processing unit is adapted to detect the current I1 of the first current path and the current I3 of the third current path. To provide a cost-effective switchgear for a one-phase motor and a three-phase motor which is adapted to identify the failure of every single phase in the three-phase operation and a phase failure in the one-phase operation, the processing unit is designed such as to detect the currents I1, I3 of the first and third current path and to determine, based on the phase shift between the detected currents I1, I3 of the first and third current path in which operating mode the switchgear is operated.

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