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. 28, 2017
Filed:
Apr. 09, 2012
Akinobu Ando, Chuo-ku, JP;
Hiroshi Ogino, Chuo-ku, JP;
Yasuaki Matsumoto, Chuo-ku, JP;
Shigeyuki Nakabayashi, Chuo-ku, JP;
Yasuhiko Hosokawa, Chuo-ku, JP;
Akinobu Ando, Chuo-ku, JP;
Hiroshi Ogino, Chuo-ku, JP;
Yasuaki Matsumoto, Chuo-ku, JP;
Shigeyuki Nakabayashi, Chuo-ku, JP;
Yasuhiko Hosokawa, Chuo-ku, JP;
Abstract
In the ground fault detecting circuit, one terminals of first to third resistance elements are connected to first to third AC lines, respectively, the other terminals of the first to third resistance elements are commonly connected to one terminal of a fourth resistance element, and the other terminal of the fourth resistance element is connected to a line of a ground voltage. On the basis of a voltage across the terminals of the fourth resistance element, the ground fault detecting circuit detects whether a ground fault has occurred or not. Since a current does not flow through the fourth resistance element in the normal state and flows through the fourth resistance element after the occurrence of a ground fault, it is possible to detect the occurrence of the ground fault at a high accuracy.