Voltage condition monitor

Details Voltage condition monitor Voltage condition monitor

1974-02-25

1976-07-13

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307235J, 317 31, 328261, 340248B, 340248D, 340249, H02H 324, H02H 718

Patent

active

039696359

ABSTRACT:
A device for monitoring a variable voltage supply level is disclosed. The monitoring device functions to supply a signal which may be used to shut-down that equipment being supplied and/or drive an indicating device when the voltage level is below a trip voltage and, when the voltage level exceeds the trip voltage to provide a signal which may be used to reconnect the equipment circuit. The monitoring device includes a pair of low power generators each of which produce a digital signal. The digital signal of one generator varies more than the digital signal of the other generator with changes in applied voltage. The two digital signals are compared by a low power circuit and voltage level information is determined.

REFERENCES:
patent: 3166678 (1965-01-01), Fleshman, Jr. et al.
patent: 3267375 (1966-08-01), Olsen
patent: 3503062 (1970-03-01), Witzke et al.
patent: 3611162 (1971-10-01), Tochitani
patent: 3735377 (1973-05-01), Kaufman

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