Electricity: conductors and insulators – With fluids or vacuum – With fluid maintenance or conditioning means
Patent
1987-02-06
1988-03-08
Askin, Laramie E.
Electricity: conductors and insulators
With fluids or vacuum
With fluid maintenance or conditioning means
174 22C, 174 28, H02G 506
Patent
active
047300850
ABSTRACT:
A gas insulated electrical apparatus comprising a hermetic sheath filled with an electrically insulating gas having a plurality of electrically conductive sheath sections including hermetically fastened flanged ends. A high voltage conductor is electrically insulatably supported within the sheath by an electrically insulating spacer which is hermetically and securely held at its outer periphery between the flanged ends of the sheath sections. An electrically conductive trap ring is inserted between at least one of the flanged ends of the sheath sections and the outer periphery of the spacer. The trap ring defines, between the trap ring and the spacer, a low electric field particle trap in which a low electric field is formed and in which electrically conductive particles can be trapped and retained.
REFERENCES:
patent: 3809795 (1974-05-01), Olsen et al.
patent: 3898367 (1975-08-01), Nakata
patent: 4496789 (1985-01-01), Itaka et al.
"Improved Structure Avoiding Local Field Intensification on Spacers in SF.sub.6 Gas", IEEE Transactions on Power Apparatus and Systems, vol. PAS-102, Number 1, Jan. 1983, pp. 250-254.
Hama Hiroyuki
Yamamoto Hiroshi
Askin Laramie E.
Mitsubishi Denki & Kabushiki Kaisha
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