主zhu鉤gou一yi般ban常chang出chu的de問wen題ti比bi較jiao多duo，電dian機ji聲sheng音yin大da，但dan聽ting聲sheng音yin有you判pan斷duan不bu出chu來lai是shi電dian機ji還hai是shi減jian速su機ji

，這zhe時shi候hou應ying該gai檢jian查zha定ding子zi，轉zhuan子zi是shi否fou缺que相xiang，接jie線xian是shi否fou缺que相xiang，如ru果guo一yi次ci沒mei問wen題ti，檢jian查zha切qie電dian阻zu接jie觸chu器qi觸chu頭tou閉bi合he以yi及ji接jie線xian情qing況kuang。主zhu鉤gou不bu動dong。一yi般ban控kong製zhi電dian源yuan是shi從cong主zhu電dian源yuan上shang線xian接jie的de，可ke以yi把ba一yi次ci空kong開kai拉la下xia，試shi二er次ci控kong製zhi，觀guan察cha接jie觸chu器qi動dong作zuo情qing況kuang是shi否fou正zheng常chang，常chang出chu現xian線xian圈quan接jie線xian斷duan，@本文主要以cj12接觸器為例@公gong用yong線xian斷duan，凸tu輪lun控kong製zhi器qi觸chu頭tou閉bi合he不bu好hao
，斷duan線xian。零ling位wei繼ji電dian器qi是shi否fou閉bi合he，暫zan且qie這zhe麼me叫jiao，正zheng常chang情qing況kuang主zhu令ling在zai零ling位wei時shi，會hui有you一yi個ge繼ji電dian器qi處chu於yu吸xi合he狀zhuang態tai
，過guo流liu是shi不bu是shi有you問wen題ti。主zhu鉤gou不bu上shang升sheng
，檢jian查zha上shang升sheng接jie觸chu器qi是shi否fou吸xi合he超chao載zai控kong製zhi器qi輔fu助zhu點dian是shi否fou動dong作zuo，上shang升sheng限xian位wei是shi否fou動dong作zuo，下xia降jiang接jie觸chu器qi輔fu助zhu點dian閉bi合he情qing況kuang
，這zhe些xie在zai原yuan理li圖tu上shang都dou可ke以yi看kan出chu來lai，如ru果guo速su度du慢man，檢jian查zha切qie電dian阻zu接jie觸chu器qi是shi否fou相xiang應ying動dong作zuo，一yi般ban容rong易yi出chu問wen題ti的de是shi接jie觸chu器qi輔fu助zhu觸chu頭tou以yi及ji時shi間jian繼ji電dian器qi
，查zha看kan抱bao閘zha是shi否fou動dong作zuo打da開kai。一yi般ban檢jian查zha天tian車che故gu障zhang首shou先xian確que認ren電dian源yuan電dian壓ya是shi否fou正zheng常chang。凸tu輪lun控kong製zhi器qi卡ka，沉chen，檢jian查zha定ding位wei輪lun，定ding位wei杆gan，軸zhou套tao，以yi及ji定ding位wei齒chi。使shi用yong接jie觸chu器qi控kong製zhi，凸tu輪lun控kong製zhi器qi觸chu頭tou還hai是shi不bu容rong易yi磨mo損sun的de。要yao經jing常chang檢jian查zha電dian機ji滑hua環huan是shi否fou光guang滑hua，不bu能neng積ji塵chen太tai多duo

，控kong製zhi盤pan接jie線xian是shi否fou鬆song動dong
，如ru果guo接jie線xian氧yang化hua要yao盡jin快kuai更geng換huan線xian鼻bi子zi重zhong新xin壓ya接jie
，接jie觸chu器qi應ying安an排pai時shi間jian檢jian查zha觸chu頭tou
，動dong鐵tie心xin穿chuan絲si鬆song動dong
，動dong鐵tie芯xin後hou支zhi架jia墊dian片pian掉diao落luo容rong易yi造zao成cheng線xian圈quan燒shao壞huai。線xian槽cao拐guai角jiao以yi及ji容rong易yi被bei人ren踩cai到dao的de地di方fang是shi最zui容rong易yi造zao成cheng斷duan線xian及ji接jie地di的de，有you很hen多duo還hai是shi似si接jie非fei接jie，讓rang你ni很hen不bu好hao找zhao毛mao病bing。經jing常chang檢jian查zha，點dian檢jian能neng夠gou很hen好hao的de避bi免mian發fa生sheng很hen多duo事shi故gu。