PROBLEM TO BE SOLVED: To provide an electric fence through which a man can pass at any optional position without receiving an electric shock, to provide a control method for the electric fence, to provide an electric power unit of the electric fence, to provide a voltage generator of the electric fence, and to provide a control circuit of the electric fence.SOLUTION: When a power switch 55 is ON and a detective electric signal voltage generator 23 is not connected with fence lines 3, only a first voltage from a voltage generator 56 is supplied to the fence lines 3. The generated first voltage is applied to fence lines 3 [naked wires (3A-3D)] thereby when a man, a wild animal or the like contacts the naked wires (3A-3D), it receives a shock. A hook-shaped positive terminal 23A of the detective electric signal voltage generator 23 is hooked on a necked wire 3A, a rod-shaped negative terminal 23B is inserted to the ground and a second voltage is applied to the necked wire 3A. Thus, a coil 53 of a relay is excited and a B contact point 54 of the relay is opened so that the power supply voltage is not applied to the voltage generator 56 and the generation of the first voltage is stopped.COPYRIGHT: (C)2012,JPO&INPIT【課題】人が感電することなく所望の位置で通り抜けることができる電気柵、電気柵の制御方法、電気柵の電源装置、電気柵の電圧発生器、並びに電気柵の制御回路を提供する。【解決手段】電源スイッチ55が「オン」であり、検出用電気信号電圧発生器23を柵線3に接続していない場合、柵線3には、電圧発生器56からの第1の電圧のみが与えられている。発生した第1の電圧は、柵線3(裸電線(3A~3D))に印加され、人や野生動物などが裸電線(3A~3D)に接触すると衝撃を受ける。検出用電気信号電圧発生器23のフック形状のプラス端子23Aを裸電線3Aに引っ掛け、棒状のマイナス端子23Bを地中に差し込み、第2の電圧を裸電線3Aに与えている。その結果、リレーの巻線53は励磁され、リレーのB接点54は開くので、電圧発生器56には電源電圧が印加されなくなり、第1の電圧の発生は停止する。【選択図】図1
