Ground circuit voltage detector

Details Ground circuit voltage detector Ground circuit voltage detector

1981-10-07

1983-08-09

Brigance, Gerald L.

Communications: electrical

Condition responsive indicating system

Specific condition

340661, 328148, G08B 2100

Patent

active

043981887

ABSTRACT:
A ground circuit voltage detector for monitoring stray ground voltages occurring in dairy equipment to provide both an instantaneous warning indication and a sustained alarm indication. The voltage detector is connected between the equipment to be monitored at a sensing input and a separate ground. The sensed voltage is filtered and applied to a first comparator through an averaging circuit. If the average ground voltage exceeds the threshold level of the first comparator, a warning indication is provided which is proportional in strength to the sensed ground voltage. The first comparator is connected in series with a second comparator through an integrator. If the threshold level of the second comparator is exceeded, a sustained alarm indication is provided. A test circuit applies a voltage to the detector input to ensure the detector is operating properly.

REFERENCES:
patent: 3119070 (1964-01-01), Seliger
patent: 3737765 (1973-06-01), Lee et al.
patent: 3831160 (1974-08-01), Cronin et al.
patent: 3911360 (1975-10-01), Kimzey
patent: 3934176 (1976-01-01), Vasudevan et al.
patent: 4080640 (1978-03-01), Elms et al.
patent: 4311994 (1982-01-01), Kuribayashi

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