Switch device for connecting AC power source to load

Details Switch device for connecting AC power source to load Switch device for connecting AC power source to load

1982-05-17

1984-04-17

Goldberg, E. A.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307252B, 323325, H03K 1760

Patent

active

044437129

ABSTRACT:
In a switch device for connecting an AC power source to a load, a phase detector circuit detects the phase of a peak-volt point of the AC voltage. In response to the phase detector circuit, a trigger circuit triggers a semiconductor switching element into conduction at the peak volt point of the AC voltage to supply the AC voltage to the load. The surge current is significantly reduced even if the load is an inductive load.

REFERENCES:
patent: 3743860 (1973-06-01), Rossell
patent: 4041331 (1977-07-01), Westerman et al.
patent: 4119905 (1978-10-01), Head
patent: 4328482 (1982-05-01), Belcher et al.

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