The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2018
Filed:
Aug. 29, 2013
Applicant:
Kyocera Corporation, Kyoto, JP;
Inventor:
Tetsuya Takenaka, Yamato, JP;
Assignee:
KYOCERA CORPORATION, Kyoto, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 38/38 (2006.01); G01R 31/02 (2006.01); G01R 31/12 (2006.01); G01R 31/40 (2014.01); H02H 3/16 (2006.01); H01F 38/28 (2006.01); H02H 3/33 (2006.01);
U.S. Cl.
CPC ...
H01F 38/38 (2013.01); G01R 31/025 (2013.01); G01R 31/12 (2013.01); G01R 31/40 (2013.01); H01F 38/28 (2013.01); H02H 3/16 (2013.01); H02H 3/335 (2013.01); H02H 3/338 (2013.01); H02H 3/167 (2013.01);
Abstract
An abnormality occurring in a ZCT is detected simply and reliably. A zero-phase-sequence current transformer (ZCT) () detects zero-phase-sequence current in power wires inserted therethrough, and in addition to the power wires, has inserted therethrough a wire through which a constant DC offset current flows.