Zero current switching circuitry

Details Zero current switching circuitry Zero current switching circuitry

1974-08-28

1976-03-23

Goldberg, Gerald

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307133, 307136, H01H 3359, H02H 300

Patent

active

039462773

ABSTRACT:
Circuitry for providing the opening of circuit breaker contacts at a zero load current crossing is disclosed. A sensing circuit senses the phase relationship of the load current with respect to time and provides a square wave voltage in phase with the load current. This square wave voltage is phase shifted and this phase shifted signal is used to control the opening of the circuit breaker contacts at a zero load current crossing point.

REFERENCES:
patent: 3265933 (1966-08-01), Perry et al.
patent: 3457432 (1969-07-01), Korn
patent: 3702941 (1972-11-01), Aiduck et al.

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