1975-10-28
1976-11-30
Miller, J D
317 11C, H02H 722
Patent
active
039951987
ABSTRACT:
In a high voltage circuit breaker arranged to be connected in series with a conductor for breaking the flow of current through the conductor, the breaker including at least two identical breaks, capacitors shunting all of the breaks for producing a voltage gradient, at least one resistor connected in shunt with at least one of the breaks, and a switch connected with the resistor and arranged to be operated in a manner such that it does not make or interrupt a current, the operation of the switch is controlled by a control device connected for operating the switch and a current transformer connected to the control device and arranged for monitoring the current flow through the conductor to provide an output which causes, during a break operation of the circuit breaker, the closing of the switch shortly before the simultaneous opening of all of the breaks only when the current through the conductor exceeds a certain value.
REFERENCES:
patent: 2885514 (1959-05-01), Thommen
patent: 3500009 (1970-03-01), Bell
patent: 3538277 (1970-11-01), Phillips
patent: 3538278 (1970-11-01), Rathbun
patent: 3566152 (1971-02-01), Casey et al.
patent: 3657607 (1972-04-01), Knauer
LICENTIA Patent-Verwaltungs-G.m.b.H.
Miller J D
Salce Patrick R.
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