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:
Jul. 06, 1976
Filed:
Mar. 13, 1975
Ake Ekstrom, Ludvika, SW;
Allmanna Svenska Elektriska Aktiebolaget, Vasteras, SW;
Abstract
In the operation of a bipolar direct-current transmission system having bipolar convertor stations with earthed center taps and transmission lines connecting the stations, one for each polarity, in which system in the event of disconnection of one pole of the stations the corresponding pole of the transmission line is connected as a return conductor for the remaining pole, in order to load the return connector with current and discharge the ground connections between the stations, the current of the corresponding pole in one of the stations is increased to the same value as the pole in operation, and thereafter the ground connection of such corresponding pole is interrupted.