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.
Inventors
👤 Gunnar Nimmersjo
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-08 16:49
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/26; H02H7/265
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
Protection means for objects included in electrical power supply networks, comprising a three-phase directional wave detector with two inputs per phase, three single-phase and one three-phase tripping output, one three-phase blocking output, and one level detector with one partial detector for each of the single-phase tripping outputs and the three-phase blocking output, said level detector is provided with a further partial detector connected to the three-phase tripping output of the wave detector, and said two partial detectors are connected to the three-phase outputs of the wave detector and have a lower reference level than the other partial detectors of the level detector and are connected to the single-phase tripping outputs of the wave detector.
Claim 2
Dependent Claim
114 words
Protection means for objects included in electrical power supply networks, comprising a three-phase directional wave detector with two inputs per phase, three single-phase and one three-phase tripping output, one three-phase blocking output, and one level detector with one partial detector for each of the single-phase tripping outputs and the three-phase blocking output, said level detector is provided with a further partial detector connected to the three-phase tripping output of the wave detector, and said two partial detectors are connected to the three-phase outputs of the wave detector and have a lower reference level than the other partial detectors of the level detector and are connected to the single-phase tripping outputs of the wave detector.
Claim 3
Dependent Claim
73 words
Protection means according to claim 1, in which the reference level of the two partial detectors in the level detector, which are connected to the three-phase outputs of the wave detector is so low that a disturbance in the power supply network, which causes signals lying below this level, will not cause a release in any other protection means in the network after reflection at the place where said protection means is located.