SHUNT CURRENT SUPPRESSION DEVICE

To provide a shunt current suppression device which saves man-hours or cost for construction work and also reduces limitations for an installation place by using an inductance element which is easily mountable to an existing metal pipe such as a gas pipe.SOLUTION: A gas pipe 3 as a metal pipe is laid between two architectural structures 1 and 2, and equipotential bonding is performed on metallic structural materials which are constituent members of the architectural structures 1 and 2 and grounded, and the gas pipe 3. A shunt current suppression device comprises parallel connection parts of insulating joints 4a and 5a disposed in the middle of the gas pipe 3 and surge protective elements 4b and 5b such as GDT for preventing voltage resistance destruction. A magnetic substance core 8 which becomes high impedance with respect to a shunt current of a lightning current to flow, in the case of lightning in any one of the architectural structures 1 and 2, from the metallic structural material constituting the one architectural structure to the other architectural structure is mounted to the gas pipe 3.SELECTED DRAWING: Figure 1 【課題】既設のガス管等の金属管に容易に装着可能なインダクタンス素子を用いることで施工作業の手間や費用を節減し、設置場所の制約も少ない低コストの分流電流抑制装置を提供する。【解決手段】二つの建築物１，２の間に、金属管としてのガス管３が敷設され、かつ、建築物１，２の構成部材であって接地された金属製構造材とガス管３とが等電位ボンディングされると共に、ガス管３の途中に配置された絶縁継手４ａ，５ａとその耐電圧破壊を防止するためのＧＤＴ等のサージ防護素子４ｂ，５ｂとの並列接続部を備え、何れかの建築物１，２への落雷時に、当該建築物を構成する前記金属製構造材から他方の建築物に流れる雷電流の分流電流に対して高インピーダンスとなる磁性体コア８を、ガス管３に装着する。【選択図】図１