Relay device

Details Relay device Relay device

1980-01-04

1983-01-25

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307 82, 307360, 328151, G11C 2702

Patent

active

043705715

ABSTRACT:
A relay device is disclosed which protects and controls an electric power line by detecting an electrical quantity carried by the electric power line. The relay device includes a rectifying circuit connected to the electric power line. The output of the rectifying circuit is supplied to a peak value holding circuit which stores the peak value of the output of the rectifying device during each predetermined period under control of a resetting pulse. The output of the peak value holding circuit is supplied to a detecting circuit having a predetermined threshold level.

REFERENCES:
patent: 3717818 (1973-02-01), Herbst
patent: 4010385 (1977-03-01), Krol
patent: 4031479 (1977-06-01), Thomas, Jr. et al.
patent: 4160922 (1979-07-01), Rickenbacker
General Electric Co., Catalog 4544K10-001, "Type 4701 Tranzducer for Voltage and Current Measurements", Oct. 1964, pp. 1, 3, 6-8.

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