Load interrupter

Details Load interrupter Load interrupter

1984-06-14

1985-11-12

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148A, 200148B, H01H 3382

Patent

active

045530084

ABSTRACT:
An load interrupter is disclosed having the characteristics of an ordinary puffer interrupter and a self-extinguishing gas flow interrupter. The load interrupter comprises a generally hollow cylinder which is adapted to be filled with an arc extinguishing fluid and which has an electrically insulated nozzle at one end. A piston is sealingly and slidingly disposed within the cylinder so as to be movable between a first and second position to change the internal volume of the cylinder that is in flow communication with the nozzled end. A stop limits the relative motion between the piston and the nozzled end of the cylinder. A spring biases the piston against the stop. One of the two contacts across which the arc is formed is carried by the piston. The other contact is operated by a prime mover to move into and out of the chamber formed by the piston, cylinder and nozzle. Thus, under low current conditions, the piston follows the movement of the other contact. Under high current carrying or fault conditions, the spring designed to be overcome by the energy released from the arc so as to control the temperature and pressure rise adequately enough to extinguish the arc by the self-extinguishing principle. The moving contact has a tip formed from an electrical insulating material to constrict the arc at the throat of the nozzle thereby increasing the arc extinguishing efficiency of the interrupter.

REFERENCES:
patent: 3996439 (1976-12-01), Takuyama et al.
patent: 4211904 (1980-07-01), Karrenbauer
patent: 4286128 (1981-08-01), Ruffieux et al.
patent: 4465910 (1984-08-01), Martin
patent: 4467158 (1984-08-01), Kobayushi et al.

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