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绝缘接头出现的短路问题

2021.11.12

绝缘接头出现的短路问题

  在(zai)(zai)绝缘(yuan)接(jie)(jie)头和接(jie)(jie)地(di)电(dian)(dian)(dian)(dian)池良好的(de)(de)情况(kuang)下,工作站(zhan)内设(she)施(shi)电(dian)(dian)(dian)(dian)位(wei)(wei)(wei)应(ying)该为(wei)自然电(dian)(dian)(dian)(dian)位(wei)(wei)(wei),即便是(shi)锌接(jie)(jie)地(di)电(dian)(dian)(dian)(dian)池漏掉一部分电(dian)(dian)(dian)(dian)流,站(zhan)内设(she)施(shi)电(dian)(dian)(dian)(dian)位(wei)(wei)(wei)可(ke)(ke)(ke)能会(hui)(hui)有(you)所(suo)下降(jiang),但不(bu)会(hui)(hui)低于-0.90VCSE。在(zai)(zai)绝缘(yuan)接(jie)(jie)头处(chu),电(dian)(dian)(dian)(dian)位(wei)(wei)(wei)有(you)可(ke)(ke)(ke)能接(jie)(jie)近-1.15V CSE。如(ru)(ru)果站(zhan)内设(she)施(shi)电(dian)(dian)(dian)(dian)位(wei)(wei)(wei)低于-0.90VCSE,就需要(yao)考虑锌接(jie)(jie)地(di)电(dian)(dian)(dian)(dian)池是(shi)否短(duan)路(lu),或(huo)者绝缘(yuan)接(jie)(jie)头是(shi)否性能不(bu)良。同时还需要(yao)分析有(you)没有(you)通过(guo)其(qi)他路(lu)径(jing)短(duan)路(lu)的(de)(de)可(ke)(ke)(ke)能。绝缘(yuan)接(jie)(jie)头短(duan)路(lu)可(ke)(ke)(ke)能会(hui)(hui)造(zao)成电(dian)(dian)(dian)(dian)源输(shu)出加(jia)大(da),如(ru)(ru)果参(can)(can)比电(dian)(dian)(dian)(dian)极靠近绝缘(yuan)接(jie)(jie)头,为(wei)了使(shi)参(can)(can)比电(dian)(dian)(dian)(dian)极能够达到要(yao)求的(de)(de)电(dian)(dian)(dian)(dian)位(wei)(wei)(wei),恒电(dian)(dian)(dian)(dian)位(wei)(wei)(wei)仪输(shu)出会(hui)(hui)增大(da)很多,有(you)可(ke)(ke)(ke)能使(shi)该阴极保护的(de)(de)保护距离加(jia)大(da)。如(ru)(ru)果绝缘(yuan)接(jie)(jie)头漏点(dian)的(de)(de)情况(kuang)非常严重(zhong),在(zai)(zai)有(you)阴极保护工作站(zhan)的(de)(de)情况(kuang)下,断点(dian)电(dian)(dian)(dian)(dian)位(wei)(wei)(wei)有(you)可(ke)(ke)(ke)能比通电(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)位(wei)(wei)(wei)更负(fu)。

原因(yin)是接地设施漏电(dian)(dian)(dian),造成(cheng)参比(bi)电(dian)(dian)(dian)极(ji)附近的电(dian)(dian)(dian)场变负。突然断电(dian)(dian)(dian)的时(shi)候地电(dian)(dian)(dian)场电(dian)(dian)(dian)位恢复到正常的状态中,即正向偏移,带动(dong)参比(bi)电(dian)(dian)(dian)极(ji)处电(dian)(dian)(dian)位上升,造成(cheng)参比(bi)电(dian)(dian)(dian)极(ji)与管道电(dian)(dian)(dian)位差(cha)增大。


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