PROBLEM TO BE SOLVED: To provide an electric fence and an electric power unit capable of operating with a low power consumption by passing a large current through an electric wire only when an animal comes in contact with the electric wire.SOLUTION: The electric fence 1 is used to prevent the invasion of an animal by passing an electric current through an electric wire 3 stretched around a field, which includes: a power source 102 a DC-DC converter 104 for converting a voltage of the power source 102 into a high voltage for supply to the electric wire a current sensor 106 for detecting a current that flows from the electric wires 3 to the ground when an animal comes in contact with the electric wire 3 and a current generator 108 for passing the large current through the electric wire 3 in response the current detected by the current sensor 106.COPYRIGHT: (C)2013,JPO&INPIT【課題】動物が電線に接触したときにのみ電線に大電流を流すことにより、低消費電力で動作することができる電気柵および電気柵用電源装置を提供する。【解決手段】本発明に係る電気柵1は、田畑の周囲に張り巡らせた電線3に電流を流して動物の侵入を防ぐ電気柵1であって、電源102と、電源102の電圧を高電圧に変換して電線に供給するDC-DCコンバータ104と、電線3に動物が接触したときに、当該動物を介して電線3から大地に流れる電流を検出する電流センサ106と、電流センサ106が検出した電流に応じて、電線3に大電流を流す電流発生器108とを備える。【選択図】図3
