Gas-blast load-break switch

Details Gas-blast load-break switch Gas-blast load-break switch

1990-11-27

1992-01-28

Broome, Harold

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148B, H01H 3382

Patent

active

050846000

ABSTRACT:
A gas-blast load-break switch comprises a pressure storage chamber for storing pressure of arc-extinguishing gas with arc energy generated by the disconnection between contacts, and a suction chamber including a piston which is moved in connection with the cut-off movement of the movable contact. A gas flowing device is provided such that the pressure raised by the arc energy is stored in the pressure storage chamber before communicating the pressure storage chamber and the suction chamber and a gas chamber formed on the opposite side of the piston from the suction chamber. The volume of the gas chamber is greater than that of the pressure storage chamber and the suction chamber, and the distance of piston movement in the suction chamber is longer than the contact length when the movable contact is thrown into the fixed contact.

REFERENCES:
patent: 4511776 (1985-04-01), Romier et al.

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