接地极安装标准

接地极安装 煤矿井下接地极安装标准 一、、变电所、移动变电站及其它配电点的接地要求 具体规定: 1、主接地极应在主、副水仓中各埋设1块～主接地极应用耐腐蚀的钢板制 2成～其面积不小于0.75m～厚度不得小于5mm。 2、、下列地点应装设局部接地极: 1,采区变电所,包括移动变电站和移动变压器,。 2,装有电气设备的硐室和单独装设的高压电气设备。 3,低压配电点或装有3台以上电气设备的地点。 4,无低压配电点的采煤工作面运输巷～回风巷～集中运输巷,胶带运输巷,～ 以及由变电所单独供电的掘进工作面～至少应分别设置1个局部接地极。 5,连接高压动力电缆的金属连接装置。 3、安设标准: ,局部接地极可设置于巷道水沟内或其他就近的潮湿处～设备在水沟中的1 2局部接地极应用面积0.6 m～厚度不小于3mm的钢板或具有同等有效面积的钢管制成～并应平放于水沟深处。 2,设置在其它地点的局部接地极～可用直径不小于35mm～长度不小于1.5m的钢管制成～管上应至少钻20个直径小于5mm的透孔～并垂直全部埋入底板～也可用直径不小于22mm～长度为1m的两根钢管制成～每根管上钻10个直径不小于5mm的透孔～两根钢管相距不得小于5m～并联后垂直埋入底板～垂直埋深不得小于0.75m。 4、对接地线的要求: processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work 21,连接主接地极的接地母线应采用截面不小于50mm的铜线～或截面不小 22于100 mm的镀锌铁线～或厚度不小于4mm～截面不小于100 mm的扁钢。 ,电气设备的外壳与接地母线或局部接地极的连接～应采用截面不小于25 2 22mm的铜线～或截面不小于50mm的镀锌铁线～或厚度不小于4mm～截面不小于 250mm的扁钢。对于移动式电气设备～应用橡套电缆的接地线芯进行连接～并要求每一移动式电气设备与总接地网或局部接地极之间的接地电阻～不得超过1欧。 5、与漏电保护装置配合使用的电缆屏蔽层～也应可靠接地。低于或等于127 2伏的电气设备的接地导线和连接导线～可采用断面不小于6mm的裸铜线。 禁止采用铝导体作为接地极、接地母线、辅助接地母线、连接导线和接地导线。 6、在矿井中禁止使用无接地线芯,或无其它可供接地的护套～如铅皮、铜皮套等,的橡套电缆或塑料电缆。 二、安装示意图 1、主接地极的安装及构造示意图 processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work 1 ,吊环,2 ,吊绳,3 ,连接螺栓,4 ,辅助母线,4 ×25 扁钢,, 5 ,主接地极板,6 ,吊绳孔,7 ,接地导线,引至接地母线, 图二 主接地极的安装及构造示意图 说明:两块主接地极应分别设置在主、副水仓或集水井内～并保证其工作时总是浸没在水中。主接地极的接地导线必须焊接。 2(局部接地极 1, 管状局部接地极 processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work 图三 管状局部接地极的安装及构造示意图 说明:管状局部接地极～必须垂直打入潮湿的地中,偏差不大于15?,其埋在地下部分的长度不得小于1(5m ～地面部分应留有100m m 以上的焊接长度 ,二, 电气设备的接地方法 1(变压器的接地方法 processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work 图五 变压器的局部接地极的构造及安装示意图 说明:用连接导线把变压器高、低压侧铠装电缆的钢带和铅皮～分别接到变压器外壳专供接地的螺钉上～然后再将该螺钉与接地母线,或辅助接地母线, 相接。如用橡套电缆时～则应把电缆 的接地芯线接到进出线接线装置的接地端子上～然后再将变压器接地 2(电动机的接地方法 1 ,接线盒内的接地螺钉,2 ,接地螺钉,3 ,橡套电缆的接地线芯, 4 ,橡套电缆,5 ,连接导线,接至接地母线或辅助接地母线,, processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work 6 ,连接导线,7 ,铠装电缆 图六 电动机的局部接地极的构造及安装示意图 说明:橡套电缆的接地线芯与接线盒,箱, 内的接地螺钉连 接～然后再将电动机外壳上接地螺钉连接到接地母线,或辅助接地母线, 上,如用铠装电缆时～则应将其端头的钢带,钢丝, 和铅皮直接同该接地螺钉连接。禁止把电动机的底脚螺栓当作外壳 的接地螺钉使用 3(高压配电箱的接地方法 1 ,接地螺钉,2 ,连接导线,3 ,铠装电缆, 4 ,引至接地母线或辅助接地母线 图七 高压配电箱的局部接地极的构造及安装示意图 processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work 说明:高压配电箱的各个进出口的电缆头需要接地的部分 ,如金属铠装外皮、铅包或接地线芯,～应分别用连接导线 汇集到配电箱底架,外壳,的接地螺钉上～然后再用连接导线将其与接地母线,或辅助接地母线, 相连～也可将各个电缆头的接地部分直接与接地母线,或辅助接地母线, 相连～如图中虚线所示 4(几个设备的接地方法 a ,错误的接地方式,b ,正确的接地方式 图八 开关的局部接地极的构造及安装示意图 说明:禁止将几台设备串联接地～也禁止将几个接地部分串联。图a 为错误的串联接地方式～图b 为正确的接地方 5(移动变电站的接地方法 processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work 图十 移动变电站的局部接地极的构造及安装示意图 说明:移动变电站的接地～应先将高、低压侧橡套电缆的接地芯线分别接到进线装置的内接地端子上～用连接导线将高压侧电缆引入装置上的外接地端子与高压开关箱的外接地端子连接牢固,再将高、低压侧开关箱和干式变压器上的外接地螺钉分别 用独立的连接导线接到接地母线,或辅助接地母线, 上 二、接地线的连接和加固 processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work a ,镀锌扁钢的连接方法,b ,镀锌铁线和镀锌扁钢的连接方法 1 ,螺栓,2 ,连接导线或接地导线, ,接地母线或辅助母线,4 ,线鼻子 3 图十一 接地线的连接的构造及安装示意图 接地导线与接地极的连接处～一定要用电焊或气焊焊接。接地导线和接地母线,或辅助接地母线, 的连接处～最好也用电焊或气焊焊接。无条件时～可用直径不小于10m m 的镀锌螺栓～并加防松装置,弹簧垫、双帽, 紧固～连接处还应镀锡或镀锌 processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work a ,两根镀锌铁线的连接方法,b ,两根裸铜线的绑扎方法 1 ,连接导线或接地导线,2 ,接地母线,3 ,裸绑线 图十二 接地线的连接的构造及安装示意图 接地导线与接地极的连接处～一定要用电焊或气焊焊接。接地导线和接地母线,或辅助接地母线, 的连接处～最好也用电焊或气焊焊接。无条件时～可用直径不小于10m m 的镀锌螺栓～ 并加防松装置,弹簧垫、双帽,紧固～连接处还应镀锡或镀锌 processing procedures, documents examination and approval system was established and the system back, determined to streamline and squeezing too many files, enhances the relevance and operability of document. Third, improved document reading mode feedback system established the system of official forms and documents, document work