回答：直連法（不帶電電纜的識別）
⑴ 將被識別電纜終端(duan)的任意一好相與系(xi)統(tong)地短(duan)接。在(zai)始(shi)端(duan)將鋼(gang)鎧(kai)與系(xi)統(tong)地斷開。
⑵ 將紅夾子線(xian)一(yi)端接(jie)到發(fa)射機的紅接(jie)線(xian)柱上，另一(yi)端接(jie)至被識別電纜(lan)的相(xiang)線(xian)上
黑(hei)夾子線一端(duan)接(jie)到(dao)發(fa)射機的黑(hei)接(jie)線柱上(shang)，另一端(duan)可靠地(di)接(jie)到(dao)系統地(di)上(shang)。
⑶ 打開發射機電源開關，觀察電流表指示(shi)。一般(ban)情況下，表針擺動滿度的(de)2/3即可。
⑷ 將卡(ka)鉗卡(ka)在(zai)被識(shi)(shi)別(bie)電纜上，卡(ka)鉗箭(jian)頭指(zhi)(zhi)(zhi)向電纜終端，應觀(guan)察(cha)到接收機電表指(zhi)(zhi)(zhi)針呈現(xian)與發射機電表指(zhi)(zhi)(zhi)針一致的周(zhou)期性擺(bai)動，極性指(zhi)(zhi)(zhi)示(shi)燈呈現(xian)亮、滅(mie)周(zhou)期性變(bian)化，說明識(shi)(shi)別(bie)系統(tong)正(zheng)常。此時可攜(xie)帶接收機至測(ce)試現(xian)場。
⑸ 在(zai)測試現(xian)場(chang)，用卡鉗(qian)逐條(tiao)卡住電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)束中的每(mei)條(tiao)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)。當卡住某條(tiao)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)時(shi)，（卡鉗(qian)箭頭(tou)始終(zhong)(zhong)指(zhi)向電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)終(zhong)(zhong)端）接收機表頭(tou)順時(shi)針(zhen)呈周(zhou)期性(xing)(xing)擺動，極性(xing)(xing)指(zhi)示燈(deng)呈現(xian)亮、滅周(zhou)期性(xing)(xing)變化，此電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)即為要尋(xun)找的電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)。而卡住別的電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)，表頭(tou)呈逆時(shi)針(zhen)周(zhou)期性(xing)(xing)擺動，但(dan)極性(xing)(xing)指(zhi)示燈(deng)不(bu)亮。
