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<h1 class="h1">柴油发电机PTC低温预热启动器系统易发损坏原因</span></h1>
<div class="text">发布来源：重康电力（深圳）有限公司　　发布日期: 2024-12-21　　访问量:1240</div>
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<p>PTC起动器，实际上是以钛酸钡（BaTiO2）掺合微量的稀土元素经陶瓷工艺制成的一种半导体晶体元件，PTC元件的电阻温度在100℃以下，器件呈低阻导通状态。在居里点Tc以上，其阻值随温度的升高增大极快。在温度升到150℃时，阴值可达20千欧左右，即相当于器件的“关”状态。PTC的电阻温度特点正好满足单相发电机启动的要求，称为开关型PTC元件。</p><p>PTC启动器的作业原理如图1所示。PTC启动器与发电机启动绕组并列接人电路，在电路接通的一瞬间，由于PTC元件刚刚通过电流，发生的热量很少，温度较低，电阻很小，处于导通状态，因此启动绕组与运行绕组同时接人电路，定子中发生旋转磁场，发电机启动旋转。经过1-5s后，电流的热效应使PTC元件温度迅速升高。当温度超过100℃后，PTC元件呈高阻状态，使启动绕组似处于开路状态。这时，流过PTC元件的电流恰好起到维持高阻温度，压缩机发电机完成启动程序。在压缩机停机后，PTC元件断电，开始冷却，当温度降至70℃以下时，恢复低阻状态，从而为下一次起动作好准备。PTC起动器在发电机停转后，无法马上冷却，再次起动的间隔，一般需要3-5分钟。</p><p>1、预热开关闭合无反应正常情形下，闭合预热开关，绿色指示灯应亮，说明预热机构进入作业状态。造成指示灯不亮的起因是预热熔丝烧断保险一控制器导线插头漏接、接错，或接触不佳；预热开关指示灯损坏控制界面导线接错等。</p><p>解决步骤：检验熔丝烧断的起因。解决因导线划伤、压破造成的搭铁。查看导线插头是否按规定连接，并处理漏接或接触不好现象。根据接线图分段测量导线是否有断路状况存在。打开电器装配板，观察监控系统上红色灯是否亮，灯亮说明开关指示灯故障或开关指示灯导线接错，可根据接线图纠正。根据PTC柴油发电机进气预热器接线图查验导线与监控系统插头导线连接，如有错误应及时更正。注意更替导线插头位置时，运用挑线针将导线从插头内挑出，不可硬拉，否则会造成导线min，指示灯不闪烁预热时间超过8min(大于标定时间的20%)时，指示灯不闪烁，蜂鸣器不响。出现这种故障的可能缘由是预热控制系统内部电路故障。排除步骤是更替预热时间控制面板。</p><p>3、打开电源开关，或打开预热器开关时烧断易熔线易熔线是为了防止预热器正极导线在康明斯操作修复程序中造成搭铁而烧坏导线设置的，当预热器正极导线产生搭铁时，易熔线会首先烧坏而切断电源。造成易熔线烧断的缘由可能是正极导线划伤或磨破导线接头与架接触预热继电器接柱与金属物接触<a href="http://www.fdjhs.cn" target="_blank">美国康明斯发电机官网</a>。</p><p>处理步骤：当打开电源开关或打开预热器开关，易熔线烧断时，应将开关关闭，认真检查导线是否有固定螺栓压线状况，并及时消除。由于预热器正极导线较长，通过空间小，判定也较困难<a href="http://www.fdjhs.cn" target="_blank">康明斯发动机型号大全</a>，因此可用分段方法判断排除。当打开电源开关易熔线烧断，说明蓄电池至预热继电器接线柱一段导线有压破磨破的地方。当打开预热器开关易熔线烧断<a href="http://www.fdjhs.cn" target="_blank">康明斯发电机型号规格</a>，说明预热继电器另一接线柱至预热器正极导线接线柱一段导线中有搭铁。在处理损坏时应注意查看预热继电器导线接头是否与车架相接触，预热继电器接线柱下是否有金属物存在。</p><p>4、预热指示灯亮，预热器不加热这类故障较常见，排除也较复杂、其原由是：预热器电路中的易熔线烧断；预热操作系统到预热继电器导线插头脱落或导线断路；预热继电器触点不吸合，预热器损坏或预热器负极线短路。</p><p>处理方案：为及时准确消除故障，将PTC油机进气预热电路机构分成预热器控制电路和预热电路两部分来判断排查。首先将预热继电器上的黑色导线插头拔出，用检测灯泡检测预热控制模块至预热继电器的绿白线，正常状况下测定灯泡应亮，不亮说明故障在预热控制电路，应根据接线图检查导线各插头插接是否正确牢固，导线是否断路，并及时处理。若测量时灯泡亮，说明损坏在预热电路，可用检测灯泡分别检测预热继电器上两个接线柱；若检测时灯泡都不亮，说明易熔线烧断或正极导线断路，应处置搭铁因由，并替换易熔线；若有一接线柱灯泡亮，另一接线柱灯泡不亮，说明预热继电器触点无法吸合，应更替预热继电器。在预热导线接线柱上检测灯泡亮，说明预热器故障，在确定预热器损坏时，应检验预热器负极线连接是否准确牢固。负极线漏装或断路也可能造成预热器不加热的损坏。</p><p>5、预热效果差或柴油发电机功率无劲这具体是操作“非法”，可能的因由是：气门手柄未拉出或未拉到位；柴油发电机发动后气门手柄未退回。</p></div><a href="http://www.fdjhs.cn/" target="_blank">http://www.fdjhs.cn</a>
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