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, 1995
Filed:
Feb. 16, 1993
Shigetoshi Ouchi, Hitachi, JP;
Haruo Honda, Hitachi, JP;
Toru Yoshida, Hitachi, JP;
Yukio Kugoh, Hitachi, JP;
Fumihisa Ichikawa, Hitachi, JP;
Tutomu Kanno, Hitachi, JP;
Takashi Ichinose, Toukai, JP;
Hideaki Tsuda, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A commutating type DC circuit breaker arrangement comprising: a vacuum circuit breaker having a movable electrode and stationary electrode; a series circuit of a capacitor, a saturation reactor and a commutating switch which is connected in parallel with the vacuum circuit breaker; and an electrical relay for detecting a predetermined electrode open position at which a sufficient insulating distance between the movable electrode and the stationary electrode is maintained via movement of a predetermined position on an actuating rod for the movable electrode and for closing the commutating switch in response to the detection of the predetermined electrode open position.