Power line protection circuit

Details Power line protection circuit Power line protection circuit

1977-10-27

1980-03-04

Griffin, Robert L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

325435, 325 2, 340169, H04B 116

Patent

active

041919254

ABSTRACT:
Received power line trip signals are delayed in their tripping function by a circuit which causes introduction of the delay in response to a wideband received signal rising rapidly above a dynamic amplitude level, or in response to a narrowband received signal going outside upper and lower amplitude limits. Either condition could indicate a false trip signal, so that a delay before actual tripping is desirable.

REFERENCES:
patent: 3982188 (1976-09-01), Matsuzawa et al.
patent: 4015206 (1977-03-01), Huntley

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