Solid state current limiting circuit interrupter

Details Solid state current limiting circuit interrupter Solid state current limiting circuit interrupter

1986-06-16

1987-10-13

Paschall, M. H.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 8, H01H 7318

Patent

active

047002565

ABSTRACT:
A solid state current limiting circuit interrupter for the arcless interruption of current through a protected circuit includes a pair of mechanically switched contacts electrically connected in series between the power source and the protected load. A solid state switch becomes electrically connected in parallel across the contacts when the contacts are opened to transfer the current to the solid state switch in a first state of voltage drop lower than arc voltage, and then in a second state of voltage drop higher than power source voltage in which stored energy is dissipated and current is forced to drop to zero to interrupt the circuit.

REFERENCES:
patent: 3543047 (1970-11-01), Renfrew
patent: 3558910 (1971-01-01), Dale
patent: 4001742 (1977-01-01), Jencks et al.
patent: 4115829 (1978-09-01), Howell
patent: 4184128 (1980-01-01), Nilssen
patent: 4420784 (1983-12-01), Chen et al.
patent: 4438472 (1984-03-01), Woodworth
Pat. Applic. Ser. No. 759,710, Edward Keith Howell, "Piezoelectric Contact Driver for Circuit Interrupters", filed Jul. 29, 1985.

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