Inductor devices – Interlinked coils or windings
Patent
1999-02-09
2000-01-11
Gellner, M. L.
Inductor devices
Interlinked coils or windings
336174, 336229, 336175, H01F 3820, H01F 1706
Patent
active
060140720
ABSTRACT:
The present invention relates to a gas-insulated current transformer of simple structure for a single-phase or multi-phase switchgear, which transformer can be made in various dimensions and with magnetic cores of various lengths. The transformer comprises at least one support tube carrying three annular cores carrying respective secondary windings. The windings are superposed and disposed coaxially about the tube, and they are held by a clamping strap. The tube and the windings are disposed inside an enclosure defined by two metal plates constituting a bottom closure end plate and a top closure end plate, and by four metal side walls. The end plates are interconnected by link rods disposed in their corners. The two end plates are fixed to the ends of the rods by screws, and the metal side plates are screwed to said rods. The support tube is gas-tight and its ends are received in appropriate recesses in said end plates, one of the ends being connected to the corresponding closure end plate via an intermediate ring of insulating material.
REFERENCES:
patent: 1986884 (1935-01-01), Fassler
patent: 2431189 (1947-11-01), Moreton et al.
patent: 4338657 (1982-07-01), Lisin et al.
patent: 4701738 (1987-10-01), Preissinger et al.
Doessegger Andre
Gimeno Carmelo
Tschannen Christian
Alstom AG
Gellner M. L.
Mai Anh
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