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:
Oct. 11, 1977
Filed:
Nov. 07, 1975
Gunnar Nimmersjo, S-724 62 Vasteras, SW;
ASEA Aktiebolag, Vasteras, SW;
Abstract
In an arrangement for level and sequence detection in a directional wave detector, which has a three-phase directional wave detector with two inputs per phase and three single phase and one three-phase tripping output and one three-phase blocking output, with a level detector with one partial detector for each of the single-phase tripping outputs and the three-phase blocking output, the level detector is provided with a further partial detector which is connected to the three-phase tripping output of the wave detector and the two partial detectors which are connected to the three-phase outputs of the wave detector have a lower reference level than the other partial detectors which are connected to the single-phase tripping outputs of the wave detector.