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<h1 class="h1">高压接地、相序、绝缘和耐受电压以及保护办法</span></h1>
<div class="text">发布来源：重康电力（深圳）有限公司　　发布日期: 2026-01-05　　访问量:29</div>
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<p>机组应有良好的接地端子并有明显的标志。各项接地要求应符合GB 50169-2006中3.1“一般规定”；3.2“接地设备的选取”；3.3“接地设备的敷设”；3.4“接地体（线“携带式和移动式电气装备的接地”；3.9“电力电缆终端金属护层的接地”；3.10“配电电气装备的接地”，同时高压柜也应满足GB3906-2006中5.3“接地”的要求，并且10kV以上变压器要求有接地网。</p><p>机组各独立电气回路对地及回路间的绝缘电阻值应符合表9的规定。冷态绝缘电阻只供参考，不作考核。</p><p>4.12.4.1 机组各独立电气回路对地以及回路间应能承受表10所规定的频率为50Hz、波形尽可能为实际正弦波，历时1min的绝缘介电强度试验电压而无击穿或闪络状况。</p><p>g）高压柜的额定绝缘水平值在表11中选取，耐受电压适合于GB 311.1-2012中3.2的规定。</p><p>用GB/T 26218.1-2010给出的通常规则选购绝缘子，它们在污秽要素下该当具有良好的性能。爬电距离可按下列购买或由产品技术条件规定：</p><p>b）包括发电机在内的接线端子较小间距应符合GB 14711-2013中18.4要点。电气间隙与爬电距离应不小于表13的要点。</p><p>注1：当电机通电时，由于受机械或电气应力用途，刚性结构件的间距减轻量应不大于规定值的10％。</p><p>注2：表中电气间隙值是按电机作业地点海拔不超过1000m规定的<a href="http://www.fdjhs.cn" target="_blank">发电机</a>，当超过海拔1000m时，每上升300m，表中的电气间隙增加3％。</p><p>注3：仅对中性线而言，表中的进线：在此表中的电气间隙值可以通过使用绝缘隔板的步骤而降低；采取这种防护的性能可以通过耐电压强度试验。</p><p>机组应能紧急停机，应设有带自锁用途的紧急停机装置，并有明显标志和方便紧急状态下使用。详细的技术要点和试验方式按产品技术要素规定。</p><p>机组的带电体、旋转部件<a href="http://www.fdjhs.cn" target="_blank">康明斯柴油发电机组各型号</a>、摆动部件、高温表面、有可能逸出腐蚀性流体和气体的部位，应有防护技术举措，以防人员意外触及或受飞甩物的伤害，造成损坏。</p><p>4.13.1.1 机组应有短路保护办法。当机组输出末端发生短路时，保护办法应能迅速可靠动作，且机组无损伤。机组的短路包括单相、两相和三相短路<a href="http://www.fdjhs.cn" target="_blank">柴油发电机价格表</a>。</p><p>4.13.3.1 发电机发热温度保护。发电机定子温度、轴承温度的报警值和停机值，应根据实际运转状况确定，在较高环境温度和发电机额定负载的情况下，定子和轴承的温升限值分别满足GB 755-2008当中的技术要点。机组容量≤5000kW，当使用埋置检温计法（ETD）测定时，介绍较高的定子温度、轴承温度报警限值和停机限值见表14。</p><p>4.13.3.2 零序保护。对于一些比较干燥的地区，如有要求，在开关柜内装设零序电流互感器，设置零序保护。</p><p>4.13.3.3 备载冗余保护。机组需要时，加装综合保护装备、差动保护装置和接地保护设备。</p><p>4.13.3.4 机组按GB/T 2820.4-2009中7.3、7.4的相关规定设置保护举措。</p><p>→ 拥有超过百年的历史，是柴油发动机、关键部件、发电系统以及相关技术和服务领域的领导者。→ 持久的行业经验积累了丰富的技术常识和工程专长，形成了可靠性和稳定性的品牌认知。? 全球领导地位与市场覆盖：</p></div><a href="http://www.fdjhs.cn/" target="_blank">http://www.fdjhs.cn</a>
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