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電(dian)(dian)纜(lan)(lan)識別儀由信號(hao)(hao)(hao)發生(sheng)(sheng)器(qi)和接收鉗及信號(hao)(hao)(hao)檢(jian)(jian)測(ce)器(qi)三部分組成，信號(hao)(hao)(hao)發生(sheng)(sheng)器(qi)主要產(chan)生(sheng)(sheng)特殊(shu)的脈沖調制信號(hao)(hao)(hao)，通過(guo)輸出線加至停止運行的被測(ce)電(dian)(dian)纜(lan)(lan)上(shang)，用接收鉗在現場尋找(zhao)被測(ce)電(dian)(dian)纜(lan)(lan)，當接收鉗檢(jian)(jian)測(ce)器(qi)測(ce)到(dao)施(shi)加在電(dian)(dian)纜(lan)(lan)上(shang)特殊(shu)信號(hao)(hao)(hao)時(shi)，信號(hao)(hao)(hao)檢(jian)(jian)測(ce)器(qi)上(shang)電(dian)(dian)表指(zhi)針與施(shi)加信號(hao)(hao)(hao)頻(pin)率同(tong)步擺動，而其它電(dian)(dian)纜(lan)(lan)線上(shang)檢(jian)(jian)測(ce)到(dao)的信號(hao)(hao)(hao)則要小很多且方向相反，通過(guo)電(dian)(dian)表指(zhi)示幅度及方向，很容易判(pan)定被測(ce)電(dian)(dian)纜(lan)(lan)。