Electric power circuit breaker

Details Electric power circuit breaker Electric power circuit breaker

1985-04-01

1987-02-17

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148C, H01H 3304

Patent

active

046441182

ABSTRACT:
The power circuit breaker particularly for use in medium-voltage switchgear comprises contacting parts consisting of a contact pin, which is displaceable in the direction of its longitudinal axis, and a contact socket, which is coaxial to said pin and comprises a forward portion adapted to contact the pin. That forward portion of the socket is formed with axial slots dividing that forward portion into axial segments. Each of said segments comprises at its tip a covex portion, which protrudes radially inwardly and resiliently bears on the pin when the breaker is closed. In such breaker the pin has a forward portion, which comprises a tip and which has a length that is smaller than the largest depth to which the pin can be inserted into the socket. That forward portion consists of a composite material, which contains a metal having a high electrical conductivity and a material which releases quenching gases under the action of an electric arc. At least when the breaker is closed the pin and the socket are preferably surrounded by a sleeve for directing the flow of the quenching gases.

REFERENCES:
patent: 3586802 (1971-06-01), Nichols et al.
patent: 4368367 (1983-01-01), Roth et al.
patent: 4553008 (1985-11-01), Veverka et al.

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