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有you些xie電dian氣qi設she備bei盡jin管guan采cai納na了le防fang護hu方fang法fa，但dan仍reng不bu能neng有you效xiao地di避bi免mian觸chu電dian。在zai這zhe種zhong情qing況kuang下xia，可ke單dan獨du或huo合he作zuo運yun用yong防fang上shang觸chu電dian事shi端duan的de聯lian鎖suo設she備bei。這zhe種zhong設she備bei能neng夠gou有you效xiao地di避bi免mian人ren員yuan直zhi觸chu摸mo及ji或huo過guo火huo挨ai近jin帶dai電dian體ti。電dian氣qi聯lian鎖suo設she備bei一yi般ban裝zhuang在zai帶dai電dian禁jin區qu入ru口kou的de門men窗chuang上shang，通tong過guo安an全quan開kai關guan或huo光guang電dian開kai關guan操cao控kong帶dai電dian設she備bei的de作zuo業ye狀zhuang態tai。例li如ru，在zai高gao壓ya試shi驗yan場chang所suo的de圍wei欄lan門men裝zhuang設she一yi個ge安an全quan開kai關guan，當dang門men關guan上shang時shi開kai關guan接jie通tong電dian源yuan，向xiang試shi驗yan地di址zhi送song電dian；當dang門men翻fan開kai時shi，開kai關guan也ye隨sui之zhi斷duan開kai，然ran後hou堵du截jie電dian源yuan。這zhe樣yang，就jiu可ke保bao證zheng進jin入ru試shi驗yan場chang所suo的de作zuo業ye人ren員yuan無wu觸chu電dian風feng險xian。又you如ru，在zai橋qiao式shi起qi重zhong機ji上shang，從cong駕jia駛shi室shi通tong往wang橋qiao麵mian的de艙cang口kou一yi般ban都dou裝zhuang有you開kai關guan，當dang駕jia駛shi員yuan翻fan開kai艙cang門men時shi，艙cang口kou開kai關guan也ye被bei翻fan開kai，使shi起qi重zhong機ji主zhu電dian源yuan同tong時shi斷duan電dian。這zhe樣yang，駕jia駛shi員yuan在zai橋qiao麵mian上shang作zuo業ye時shi就jiu不bu會hui遭zao受shou觸chu電dian風feng險xian。
電dian容rong器qi的de主zhu動dong放fang電dian設she備bei也ye是shi通tong過guo安an全quan開kai關guan與yu電dian容rong器qi電dian源yuan或huo電dian容rong器qi室shi的de門men聯lian鎖suo的de。當dang電dian源yuan斷duan開kai或huo電dian容rong器qi室shi的de門men翻fan開kai後hou，放fang電dian設she備bei便bian當dang即ji投tou入ru放fang電dian，然ran後hou能neng夠gou避bi免mian電dian容rong器qi的de剩sheng下xia電dian荷he傷shang人ren。
有時，為了防上誤操作對作業人員的要挾，在需要按順序操作的開關設備上也裝設聯鎖設備。例如，在6~10千qian伏fu配pei電dian體ti係xi中zhong，阻zu隔ge開kai關guan與yu斷duan路lu器qi之zhi間jian的de聯lian鎖suo，能neng夠gou有you效xiao地di避bi免mian阻zu隔ge開kai關guan帶dai負fu荷he開kai合he，使shi誤wu操cao作zuo無wu法fa進jin行xing，然ran後hou能neng夠gou避bi免mian誤wu操cao作zuo所suo發fa生sheng的de風feng險xian。
