Protection means for objects included in electrical power supply

Details Protection means for objects included in electrical power supply Protection means for objects included in electrical power supply

1975-11-07

1977-10-11

Miller, J. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 84, 361110, H02H 326

Patent

active

040538168

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.

REFERENCES:
patent: 3612989 (1971-10-01), Souillard et al.
patent: 3878460 (1975-04-01), Nimmersjo
patent: 3890544 (1975-06-01), Chamia
patent: 3938007 (1976-02-01), Boniger et al.
patent: 3956671 (1976-05-01), Nimmersjo

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