Method for detecting input AC voltage

Details Method for detecting input AC voltage Method for detecting input AC voltage

1988-03-22

1989-09-05

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307234, 328 28, 328 32, 328111, 328150, H03K 5153

Patent

active

048641634

ABSTRACT:
A rectified ac voltage which is not smoothed is compared with a reference voltage directly, and a pulse is generated when the instantaneous value of the rectified ac voltage exceeds the reference voltage. Based on the pulse generation, a judgement is performed on whether the ac voltage is reaching a predetermined value or not. These operations allow the abnormality of the ac voltage to be rapidly detected with improved accuracy.

REFERENCES:
patent: 3846692 (1974-11-01), Hill
patent: 3852731 (1974-12-01), Hollands
B. Voynovich, "Bipolar Single Channel Analyser", New Electron, vol. 10, No. 7, Apr. 5, 1977, p. 63.

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