Electrical compression switch with contact movement assistor

Details Electrical compression switch with contact movement assistor Electrical compression switch with contact movement assistor

1977-04-13

1980-12-02

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200150G, H01H 3388

Patent

active

042373565

ABSTRACT:
An electrical compression switch operating with a compressed gaseous arc quenching medium comprises a switch chamber containing a pair of disengageable contacts one of which is a pin contact and the other a tubular nozzle contact surrounded by a tubular nozzle made from insulating material engageable with the pin contact and which surrounds the tubular nozzle contact in spaced relation to form a compression chamber. An expansion chamber is secured to the end of the tubular nozzle of insulating material and a differential piston operates within the latter and also within the compression chamber. A switch drive effects movement of the pin contact and differential piston considered as one unit relative to the tubular nozzle contact, the tubular nozzle of insulating material and the quenching medium expansion chamber considered an another unit to effect disengagement of the switch contacts as well as relative movement between the differential piston and tubular nozzle of insulating material in such direction as to decrease the volume of the compression chamber and thereby increase the pressure of the quenching medium at the arc which together with the thermal energy of the arc assists in the switch drive and also assists in arc extinction.

REFERENCES:
patent: 3975602 (1976-08-01), Hertz et al.
patent: 3987261 (1976-10-01), McConnell

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