Patent ID: 6690565
Filing Date: 2004-02-10
Classification: H02H

Abstract:
A stray current attenuation device for attenuating a stray current impulse flowing through a ground return circuit in a proximity of an animal susceptible to be affected by said stray current impulse, comprising:an impedance having one coil for each power line at an input of an electrically conductive element, wherein all said coils are magnetically coupled via a common ferrite core, wherein said coils have a same number of windings and wherein a summation of ampere turns of said coils is equal to zero; said impedance being in series between the output of a power source and said electrically conductive element, said electrically conductive element being connected to said ground return circuit; whereby attenuation of the stray current impulse limits capacitive leakage which affects the animal and whereby an inductance of the impedance, coupled to a parasitic capacitance of the electrically conductive element, creates a reactive filter effect.