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:
Nov. 16, 1976
Filed:
Jul. 03, 1975
Applicant:
Inventor:
Ake Ekstrom, Ludvika, SW;
Assignee:
Allmanna Svenska Elektriska Aktiebolaget, Vasteras, SW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
321-2 ; 321 19 ;
Abstract
A high voltage direct current transmission includes a rectifier station and an inverter station each connected to an AC network and connected together by a DC line. In order to limit over-voltages on the line and in the rectifier station on starting the station towards an open line, this station is provided with an arrangement which senses the voltage and the current of the station and is connected by level indicators for maximum voltage and minimum current to a signal emitter which reduces the direct voltage of the station in response to a direct voltage above a certain level and a direct current below a certain level.