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<h1 class="h1">柴油发电机出线电缆沟和桥架敷设规范</span></h1>
<div class="text">发布来源：康柴（深圳）电力技术有限公司　　发布日期: 2024-08-20　　访问量:3039</div>
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<p>摘要：有关康明斯发电机组出线至变电所内低压柜电缆（母线槽）芯数的选定，让许多电气规划人员苦恼不已。因为大部分电气工程师对大电电源布置比较精通，并不擅长柴发相关技术知识。因此，康明斯公司在本文专门给规划师做个简易的论说，叙说柴发连接电缆的选型原则和敷设方式，以及在施工程序中的主要要求，希望此举能给广电网气设计人员一些建设性意见。</p><p>1、当柴油油机房和变电所距离不远，其室内接地干线彼此相连通，且该接地干线能满足发电机配出线路的短路热稳定要求时，柴油发电机至变电所内低压屏的低压电缆（母线），可采用四芯 （三相相线+N线），而采用上述接地干线作为其PE线、当柴油柴油发电机房距离变电所较远或与变电所处于不同建筑物时，柴油发电机至变电所内低压屏的低压电缆（母线），采用五芯。</p><p>如2.5mm2的导线及以上导线的载流量和截面数的倍数关系是顺着线、“三十五乘三点五，双双成组减点五”说的是35mm2的导线及以上的导线，其载流量与截面数之间的倍数关系变为两个两个线导线导线倍，以此类推。</p><p>&nbsp;铜线铝线、根据管内穿线根数的多少，按其载流量的打相应的折数。也就是说，管内穿的线根数越多，其载流量越小。综合上述，电气规划师应根据项目不一样实际情形，选用实用的线 YJV、YJLV三芯电力电缆的持续载流量 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（单位：A）</p><p>① 在敷设因素许可的要素下，康明斯发电机组电缆长度可考虑1.5﹪~2﹪的余量，以作为维修时的备用，直埋电缆应作波浪形埋设。</p><p>② 对于电缆引入或引出建筑物或构筑物、电缆穿过楼板及具体墙壁处、从电缆沟道引出至电杆，或沿墙壁敷设的电缆在地面上2m高度及埋入地下0.25m深的一段。电缆应穿钢管保护，钢管内径不得小于电缆外径的2倍。</p><p>③ 电缆与不一样管道一期埋设时，不允许在敷设煤气管、天然气管及液体燃料管路的沟道中敷设电缆；少数电缆允许敷设在水管或通风道的明沟或隧道中，或者与这些沟交叉，在热力管道的明沟或隧道中，通常不要敷设电缆；特殊情形下，如不致电缆过热时，可允许少数电缆允许敷设在热力管道的沟道中，但应分隔在不一样侧，或将电缆装配在热力管道的下面。</p><p>（1）电缆壕沟严禁平行设置于管道的正上方或下方，严禁规划热力管道，严禁有易燃气体或易燃液体的管道穿越。</p><p>（3）沟体的开挖深度，应按规划要求执行。开挖施工中不得超挖，如产生超挖，运用石粉回填夯实至设计深度。</p><p>（5）在沟底捣制C15混凝土板基本，垫层厚度为行人：100mm&nbsp;运转：150mm。捣制混凝土板基础要平直，浇灌程序中用平板振动器震捣。</p><p>（9）电缆沟宜每隔20m设置自然集水口一个，&nbsp;电缆构筑物应实现排水畅通，电缆沟纵向排水坡不小于0.5%。必要时应实施机械排水。集水口采用Φ200PVC管，管内充满细砂。</p><p>（10）砖砌电缆沟沟壁砖砌灰缝必须饱满，砂浆强度达到布置强度的70％后才允许砂浆抹面。电缆沟长度超过50米时，砌体及压梁应设置伸缩缝。内壁及沟底用1:2水泥防水砂浆（掺5％水泥毛重防水剂）批挡抹面15厚，宜分两层抹面并压光。</p><p>（11）质量要求：砖砌电缆沟中心线mm、沟顶及埋件水平偏差≤3mm、沟壁截面尺寸偏差≤3mm；</p><p>（12）砖砌电缆沟设C20混凝土压顶，压角采用L75X6角钢。要求工作井盖板顶面标高应与运转路面标高一致。</p><p>○&nbsp;发烫、腐蚀性液体或油的溅落等需防护场所，宜购买托盘，较上一层桥架应设置实体盖板。</p><p>（7）电缆桥架水平安装的支架间距为1.5m~2m，垂直安装的支架间距不大于2m。电缆桥架较上层至楼板的距离不宜小于350mm。双层电缆桥架之间的净距不宜小于h+100mm（h为桥架高度）。</p><p>（8）在竖井装配室的桥架，其垂直偏差不应大于其长度的0.2%；支架横撑的水平误差不应大于其宽度的0.2%；竖井对角线的偏差不应大于其对角线）金属制桥架装置，包括金属电缆桥架及其支架和引入或引出的金属电缆导管，应设置可靠的电气连接并接地。采用玻璃钢桥架时，应沿桥架全长另敷设专用接地线）电缆桥架的外表面明显位置，直线m以及分支、转弯等处应设置用油漆喷涂醒目的电缆标志。</p></div><a href="http://www.gdkmsfdj.com/" target="_blank">http://www.gdkmsfdj.com</a>
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