Multi-phase voltage sensing switching device

Details Multi-phase voltage sensing switching device Multi-phase voltage sensing switching device

1974-06-24

1976-02-24

Envall, Jr., R. N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3171485R, 307235R, H02H 324

Patent

active

039406644

ABSTRACT:
The disclosure describes a device for detecting undervoltage conditions on multi-phase alternating current circuits which senses the voltage on the phase having the highest instantaneous positive voltage. A differential between pickup and dropout voltage is provided. Also provided is a delayed pickup following a return to normal voltage on the circuit being monitored.

REFERENCES:
patent: 2942123 (1960-06-01), Schuh, Jr.
patent: 2959717 (1960-11-01), Conger
patent: 3243658 (1966-03-01), Blackburn
patent: 3749944 (1973-07-01), Luebrecht
patent: 3843908 (1974-10-01), Priegnitz

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