Delayed action electrical protection device, depending on an adj

Details Delayed action electrical protection device, depending on an adj Delayed action electrical protection device, depending on an adj

1979-04-05

1981-06-23

Wise, Edward J.

Boots, shoes, and leggings

364200, 361 35, H02H 308

Patent

active

042754453

ABSTRACT:
The invention relates to an electrical protection device. According to the invention an adjusted signal is monitored to detect the presence of unwanted disturbances. A microprocessor is used to calculate a delay time for tripping in accordance with the comparison of this signal to calculated values within the microprocessor.

REFERENCES:
patent: 3569785 (1971-03-01), Durbeck et al.
patent: 3842249 (1974-10-01), Geyer et al.
patent: 3931502 (1976-01-01), Kohlas
patent: 3972470 (1976-08-01), Takagi
patent: 3984737 (1976-10-01), Okamura et al.
patent: 4075699 (1978-02-01), Schneider et al.
patent: 4161027 (1979-07-01), Russell

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