专利名称：CONSTANT-POTENTIAL DRAINAGE 申请号：JP8994584
申请日：19840504
汉乐府诗集公开号：JPH0474217B2
古老的图腾
公开日：
放荡者19921125
专利内容由知识产权出版社提供
销售队名
spot翻译摘要：PURPOSE:To check overprotection in a buried pipe, by using a transistor for a drainage circuit of a stray current in a rail or the buried pipe, etc., while connecting a corrosion protective subject to the emitter, a drainage current receiving body to a collector and a voltaic anode to a ba, respectively. CONSTITUTION:A buried pipe 2 and a metallic body 3 or a voltaic anode are laid under the ground 1 on which an electric rail 4 is laid down, and the metallic body 3 is connected to a ba of a transistor Tr5 while the buried pipe 2 and the rail 4 are connected to an emitter and a collector of the transistor Tr5, rexepectively. At this time, each of galvanic currents 6 and 7 is produced between the buried pipe 3 and the metallic body 3 as well as between the rail 4 and the metallic body 3, while electromotive force 3'' for generating the galvanic current is produced in the metallic body 3. In addition, leakage resistance 2' looking from a drainage point of the buried pipe or the like, grounding resistance in the metallic body 3 and leakage resistance 4' of the rail 4 looking from a drainage connecting point are all produced there. Under this condition, when potential-to-ground of the buried pipe 2 is approximated to electrode potential of the metallic body 3, a ba current for the transistor Tr5 is reduced to some extent whereby drainage current restraint is made to be yet promoted.领证祝福语
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