High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Air-current blowout
Patent
1998-08-10
2000-01-25
Donovan, Lincoln
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Air-current blowout
218 78, 218154, H01H 3318, H01H 3370, H01H 3382
Patent
active
060181338
ABSTRACT:
A circuit-breaker of the puffer type, comprising two arcing contacts, at least one of the arcing contacts being part of a moving contact assembly made up of a first tube co-operating with a second tube to define a blast chamber, and a compression chamber closed by a semi-moving piston, the circuit-breaker being provided with first means for holding the piston stationary during a first portion of the displacement stroke of the moving contact assembly between the closed position and the open position, and with second means for displacing the piston axially with the moving contact assembly during a second portion of the same displacement stroke. The first means for holding the piston stationary comprise a stationary retaining member for locking an abutment arrangement associated with the piston, and the second means for axially displacing the piston comprise an unlocking member for unlocking said abutment arrangement, which member is associated with the moving contact assembly.
REFERENCES:
patent: 3939317 (1976-02-01), Noack et al.
patent: 4015095 (1977-03-01), Bitsch et al.
patent: 5780799 (1998-07-01), David
patent: 5859399 (1999-01-01), Perret
Donovan Lincoln
GEC Alsthom T & D SA
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