Memory circuit in a relay protection device

Details Memory circuit in a relay protection device Memory circuit in a relay protection device

1980-09-05

1982-07-27

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 85, 361 86, 364483, H02H 338, H02H 324

Patent

active

043420630

ABSTRACT:
The invention relates to a memory circuit in a relay protection device with a phase-locked loop, a monitoring circuit and an updating circuit. When a fault detector, a phase-change detector and/or an amplitude-change detector monitoring an a.c. network to which the protection device is connected supply an output signal indicative of a fault in the network, no updating of a storing member in the loop takes place.

REFERENCES:
patent: 3569785 (1971-03-01), Durbeck et al.
patent: 3723864 (1973-03-01), Ricard

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