Stray voltage reduction device

Details Stray voltage reduction device Stray voltage reduction device

1996-11-08

1998-08-11

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 56, 361 43, 361220, 307326, H04H 318

Patent

active

057935912

ABSTRACT:
Stray voltage reduction system for reducing electrical shocks to livestock in a farm and similar building wherein the system senses a voltage between first and second components, such as metal stall stanchion and metal water trough, of a livestock enclosure or holding area and electrically shorts the first and second components for a preset time period when a stray voltage beyond a preset trigger voltage potential difference is detected between the first and second components. The device includes a voltage sensing circuit for sensing voltage between the first and second components, a comparator, and electrical shorting circuit that can include a relay actuated switch responsive to the output of the comparator when a sensed potential difference between the first and second components equals or exceeds a preset trigger value to electrically short (switch closed by relay) the components for a time to reduce the voltage below the trigger value. The device is advantageous to reduce stray voltage between first and second components in a livestock enclosure and thus electrical current to which livestock in the enclosure may be subjected.

REFERENCES:
patent: 3784842 (1974-01-01), Kremer
patent: 4573098 (1986-02-01), Williston
patent: 4816956 (1989-03-01), Hertz et al.
patent: 4942313 (1990-07-01), Kinzel
patent: 5075620 (1991-12-01), Shaw
patent: 5321318 (1994-06-01), Montreuil
patent: 5465051 (1995-11-01), Graham
Stray Voltage-Proceedings of the National Stray Voltage Symposium-Oct. 10-12, 1984, American Society of Agricultural Engineers, pp. 87-99, 129-173.
Dairy Cattle Response to Transient Voltages and Magnetic Fields IEEE Rural Electric Power Conference, Apr. 24-26, 1994, (Abstract).
Effects of Electrical Voltage/Current on Farm Animals, US Dept of Agriculture Handbook, No. 696, Dec., 1991, pp. 2-1 to 2-23 & 4-1 to 7-18.

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