首页 › 防雷技术标准/政策/法规 › [转帖]《建筑物防雷设计规范》GB50057-94 2000 年局部修订 6.3

asp 发表于 2002-11-4 15:38:00

[转帖]《建筑物防雷设计规范》GB50057-94 2000 年局部修订 6.3

[这个贴子最后由ASP在 2003/04/29 11:43am 第 1 次编辑]<br><br>&lt;p align=&quot;center&quot;&gt;&lt;font size=&quot;3&quot;&gt;中华人民共和国国家标准 &lt;br&gt;&lt;br&gt;《建筑物防雷设计规范》GB50057-94 &lt;br&gt;&lt;br&gt;局部修订条文 &lt;/font&gt;&lt;/p&gt;&lt;table&gt;&lt;tr&gt;&lt;td&gt;&lt;p align=&quot;center&quot;&gt;&lt;font size=&quot;3&quot;&gt;工程建设标准局部修订公告 &lt;br&gt;&lt;/font&gt;&lt;font size=&quot;2&quot;&gt;&lt;br&gt;第24号 &lt;br&gt;&lt;br&gt;国家标准《建筑物防雷设计规范》GB50057-94，由国家机械工业局设计研究院会同有关单位进行了局部修订，已经有关部门会审，现批准局部修订的条文，自2000 年10月1日起施行，原规范中相应的条文同时废止。现予公告。 &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;br&gt;&lt;/font&gt;&lt;font size=&quot;3&quot;&gt;中华人民共和国建设部 &lt;br&gt;　2000年8月24日&lt;/font&gt;&lt;/p&gt;&lt;/td&gt;&lt;/table&gt;&lt;p align=&quot;left&quot;&gt;&lt;font size=&quot;2&quot;&gt;第三节 &nbsp;屏蔽、接地和等电位连接的要求 &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;br&gt;第6.3.1条 &nbsp;为减少电磁干扰的感应效应，宜采取以下的基本屏蔽措施：建筑物和房间的外部设屏蔽措施，以合适的路径敷设线路，线路屏蔽。这些措施宜联合使用。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　为改进电磁环境，所有与建筑物组合在一起的大尺寸金属件都应等电位连接在一起，并与防雷装置相连，但第一类防雷建筑物的独立避雷针及其接地装置除外。如屋顶金属表面、立面金属表面、混凝土内钢筋和金属门窗框架。&lt;br&gt;　　在需要保护的空间内，当采用屏蔽电缆时其屏蔽层应至少在两端并宜在防雷区交界处做等电位连接，当系统要求只在一端做等电位连接时，应采用双层屏蔽，外层屏蔽按前述要求处理。&lt;br&gt;　　在分开的各建筑物之间的非屏蔽电缆应敷设在金属管道内，如敷设在金属管、金属格栅或钢筋成格栅形的混凝土管道内，这些金属物从一端到另一端应是导电贯通的，并分别连到各分开的建筑物的等电位连接带上。电缆屏蔽层应分别连到这些带上。&lt;br&gt;　　[说明] &nbsp;一钢筋混凝土建筑物等电位连接的例子见图6.3.1-1。对一办公建筑物设计防雷区、屏蔽、等电位连接和接地的例子见图6.3.1-2。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　屏蔽是减少电磁干扰的基本措施。&lt;br&gt;　　屏蔽层仅一端做等电位连接和另一端悬浮时，它只能防静电感应，防不了磁场强度变化所感应的电压。为减少屏蔽芯线的感应电压，在屏蔽层仅一端做等电位连接的情况下，应采用绝缘隔开的双层屏蔽，外层屏蔽应至少在两端作等电位连接。在这种情况下外屏蔽层与其它同样做了等电位连接的导体构成环路，感应出一电流，因此产生减低源磁场强度的磁通，从而基本上抵消掉无外屏蔽层时所感应的电压。 &lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t631-1.jpg&quot; width=&quot;336&quot; height=&quot;458&quot;&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;图6.3.1-1 &nbsp; 一钢筋混凝土建筑物内等电位连接的例子 &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;br&gt;1──电力设备；　　　　2──钢支柱；　　　3──立面的金属盖板；&lt;br&gt;4──等电位连接点；　　5──电气设备；　　6──等电位连接带；&lt;br&gt;7──混凝土内的钢筋；　8──基础接地体；　9──各种管线的共用入口。 &lt;br&gt;&lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t631-21.jpg&quot; width=&quot;422&quot; height=&quot;315&quot;&gt;&lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t631-22.jpg&quot; width=&quot;473&quot; height=&quot;381&quot;&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;图6.3.1-2 &nbsp;对一办公建筑物设计防雷区、屏蔽、等电位连接和接地的例子 &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;br&gt;第6.3.2条 &nbsp;在建筑物或房间的大空间屏蔽是由诸如金属支撑物、金属框架或钢筋混凝土的钢筋等自然构件组成时，这些构件构成一个格栅形大空间屏蔽，穿入这类屏蔽的导电金属物应就近与其做等电位连接。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　当对屏蔽效率未做试验和理论研究时，磁场强度的衰减应按下列方法计算。&lt;br&gt;　　一、在闪电击于格栅形大空间屏蔽以外附近的情况下，当无屏蔽时所产生的无衰减磁场强度Ho，相当于处在LPZ0区内的磁场强度，应按下式计算： &lt;br&gt;&lt;br&gt;　　H0 = i0/(2·л·Sa)(A/m) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（6.3.2-1）&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;式中：i0──雷电流（A），按本规范附录六的附表6.1和6.2选取；&lt;br&gt;　　　Sa──雷击点与屏蔽空间之间的平均距离（m）。（图6.3.2-1）&lt;br&gt;&lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t632-1.jpg&quot; width=&quot;516&quot; height=&quot;290&quot;&gt;&lt;br&gt;&lt;br&gt;图6.3.2-1 &nbsp;附近雷击时的环境情况&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Sa：雷击点至屏蔽空间的平均距离 &lt;br&gt;&lt;br&gt;当有屏蔽时，在格栅形大空间屏蔽内，即在LPZ1区内的磁场强度从H０减为H1，其值应按下式计算：&lt;br&gt;&lt;br&gt;　　H1 = H0/10SF/20（A/m） &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; （6.3.2-2）&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;式中：SF──屏蔽系数（dB），按表6.3.2的公式计算。&lt;br&gt;　　表6.3.2的计算值仅对在LPZ1区内距屏蔽层有一安全距离 dS/1 的安全空间 VS 内才有效（见图6.3.2-2），dS/1 应按下式计算：&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;　　dS/1 = w·SF / 10（m） 　　（6.3.2-3）&lt;br&gt;&lt;br&gt;式中：w──格栅形屏蔽的网格宽（m）。&lt;br&gt;&lt;br&gt;&lt;/font&gt;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&#59; TEXT-INDENT: 21pt&quot;&gt;&lt;b style=&quot;mso-bidi-font-weight: normal&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span style=&quot;mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;格栅形大空间屏蔽的屏蔽系数&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-spacerun: yes&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;span style=&quot;mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;表&lt;/span&gt;&lt;span lang=&quot;EN-US&quot;&gt;6.3.2&lt;O:P&gt; &lt;/O:P&gt; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/b&gt;&lt;/p&gt;&lt;div align=&quot;center&quot;&gt; &nbsp;&lt;table border=&quot;1&quot; cellPadding=&quot;0&quot; cellSpacing=&quot;0&quot; style=&quot;BORDER-BOTTOM: medium none&#59; BORDER-COLLAPSE: collapse&#59; BORDER-LEFT: medium none&#59; BORDER-RIGHT: medium none&#59; BORDER-TOP: medium none&#59; mso-table-layout-alt: fixed&#59; mso-border-alt: solid windowtext .5pt&#59; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt&quot; width=&quot;595&quot;&gt; &nbsp; &nbsp;&lt;tbody&gt; &nbsp; &nbsp; &nbsp;&lt;tr style=&quot;HEIGHT: 20pt&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;td rowSpan=&quot;2&quot; style=&quot;BORDER-BOTTOM: windowtext 0.5pt solid&#59; BORDER-LEFT: windowtext 0.5pt solid&#59; 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BORDER-LEFT: medium none&#59; BORDER-RIGHT: windowtext 0.5pt solid&#59; BORDER-TOP: medium none&#59; HEIGHT: 20pt&#59; PADDING-BOTTOM: 0cm&#59; PADDING-LEFT: 5.4pt&#59; PADDING-RIGHT: 5.4pt&#59; PADDING-TOP: 0cm&#59; mso-border-left-alt: solid windowtext .5pt&#59; mso-border-top-alt: solid windowtext .5pt&quot; width=&quot;170&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;20&lt;/span&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;·&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;log&lt;/span&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;（&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;8.5/w&lt;/span&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;）&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/p&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/td&gt; &nbsp; &nbsp; &nbsp;&lt;/tr&gt; &nbsp; &nbsp;&lt;/tbody&gt; &nbsp;&lt;/table&gt;&lt;/div&gt;&lt;p align=&quot;left&quot;&gt;&lt;font size=&quot;2&quot;&gt;&lt;br&gt;&lt;br&gt;注：1 &nbsp;适用于首次雷击的磁场；&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　　　　　　　　 2 &nbsp;适用于后续雷击的磁场； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　　　　　　　　 3 &nbsp;相对磁导系数 μr≈200； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　　　　　　　　 4 &nbsp;w──格栅形屏蔽的网格宽（m），适用于 W≤5m；&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　　　　　　　　　　r──格栅形屏蔽网格导体的半径（m）。&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t632-2.jpg&quot; width=&quot;677&quot; height=&quot;463&quot;&gt;&lt;br&gt;√dr&lt;br&gt;&lt;br&gt;二、在闪电直接击在位于 LPZ0A 区的格栅形大空间屏蔽上的情况下，其内部 LPZ1 区内 Vs 空间内某点的磁场强度 H1 应按下式计算：&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;　　　　　H1 = kH·iｏ·w/(dw·√dr) &nbsp; &nbsp;（A/m） &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（6.3.2-4）&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;式中：dr──被考虑的点距LPZ1区屏蔽顶的最短距离（m）；&lt;br&gt;　　　　　dw ──被考虑的点距LPZ1区屏蔽壁的最短距离（m）；&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　　　　kH ──形状系数（1/√m），取 kH =0.01（1/√m）；&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　　　　w ──LPZ1 区格栅形屏蔽的网格宽（m）。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　式（6.3.2-4）的计算值仅对距屏蔽格栅有一安全距离 ds/2 的空间 Vs 内有效，ds/2 应符合下式的要求：&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;　ds/2 = w（m） 　　　　　　（6.3.2-5）&lt;br&gt;&lt;br&gt;信息设备应仅安装在Vs空间内。&lt;br&gt;　　信息设备的干扰源不应取紧靠格栅的特强磁场强度。&lt;br&gt;　　三、流过包围 LPZ2 区及以上区的格栅形屏蔽的分雷电流将不会有实质性的影响作用，处在 LPZn 区内 LPZn+1 区的磁场强度将由 LPZn 区内的磁场强度 Hn 减至 LPZn+1 区内 的Hn+1，其值可近似地按下式计算：&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;　　　Hn+1= Hn /10SF/20（A/m） 　　　　　（6.3.2-6）&lt;br&gt;&lt;br&gt;式（6.3.2-6）适用于LPZn+1区内距其屏蔽有一安全距离 ds/1 的空间 Vs。ds/1 应按式（6.3.2-3）计算。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　[说明] &nbsp;形状系数kH中的（1 /√m）为其单位。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;　　第6.3.3条 &nbsp;接地除应符合本规范其它章的规定外，尚应符合下列规定。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　一、每幢建筑物本身应采用共用接地系统，其原则构成示于图6.3.3。&lt;br&gt;　　二、当互相邻近的建筑物之间有电力和通信电缆连通时，宜将其接地装置互相连接。&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;图6.3.3 &nbsp;接地、等电位连接和共用接地系统的构成 &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t633.jpg&quot; width=&quot;664&quot; height=&quot;485&quot;&gt;&lt;br&gt;注：a──防雷装置的接闪器以及可能是建筑物空间屏蔽的一部分，如金属屋顶；&lt;br&gt;　　b──防雷装置的引下线以及可能是建筑物空间屏蔽的一部分，如金属立面、墙内钢筋；&lt;br&gt;　　c──防雷装置的接地装置（接地体网络、共用接地体网络）以及可能是建筑物空间屏蔽的一部分，如基础内钢筋和基础接地体；&lt;br&gt;　　d──内部导电物体，在建筑物内及其上不包括电气装置的金属装置，如电梯轨道、吊车、金属地面、金属门框架、各种服务性设施的金属管道、金属电缆桥架、地面、墙和天花板的钢筋；&lt;br&gt;　　e──局部信息系统的金属组件，如箱体、壳体、机架；&lt;br&gt;　　f──代表局部等电位连接带单点连接的接地基准点（ERP）；&lt;br&gt;　　g──局部信息系统的网形等电位连接结构；&lt;br&gt;　　h──局部信息系统的星形等电位连接结构；&lt;br&gt;　　i──固定安装引入PE线的 Ⅰ 级设备和不引入 PE 线的 Ⅱ 级设备； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;等电位连接带：&lt;br&gt;　　k──主要供电力线路和电力设备等电位连接用的总接地带、总接地母线、总等电位连接带。也可用作共用等电位连接带；&lt;br&gt;　　l──主要供信息线路和信息设备等电位连接用的环形等电位连接带、水平等电位连接导体，在特定情况下，采用金属板。也可用作共用等电位连接带。用接地线多次接到接地系统上做等电位连接，宜每隔 5m 连一次；&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　m──局部等电位连接带：&lt;br&gt;　　　　1-等电位连接导体，&lt;br&gt;　　　　2-接地导线，&lt;br&gt;　　　　3-服务性设施的金属管道，&lt;br&gt;　　　　 4-信息线路或电缆，&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　　　5-电力线路或电缆；&lt;br&gt;　　*──进入 LPZ 1 区处，用于管道、电力和通信线路或电缆等外来服务性设施的等电位连接。 &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;br&gt;第6.3.4条 &nbsp;穿过各防雷区界面的金属物和系统，以及在一个防雷区内部的金属物和系统均应在界面处做符合下列要求的等电位连接。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　一、所有进入建筑物的外来导电物均应在 LPZ 0A 或 LPZ 0B 与 LPZ1 区的界面处做等电位连接。当外来导电物、电力线、通信线在不同地点进入建筑物时，宜设若干等电位连接带，并应就近连到环形接地体、内部环形导体或此类钢筋上。它们在电气上是贯通的并连通到接地体，含基础接地体。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　环形接地体和内部环形导体应连到钢筋或金属立面等其它屏蔽构件上，宜每隔 5m 连接一次。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　对各类防雷建筑物，各种连接导体的截面不应小于表6.3.4的规定。&lt;br&gt;&lt;br&gt;&lt;/font&gt;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&#59; TEXT-INDENT: 21pt&quot;&gt;&lt;b style=&quot;mso-bidi-font-weight: normal&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;各种连接导体的最小截面（&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;mm&lt;sup&gt;2&lt;/sup&gt;&lt;/span&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;）&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-spacerun: yes&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/b&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;b style=&quot;mso-bidi-font-weight: normal&quot;&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;表&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;6.3.4&lt;O:P&gt; &lt;/O:P&gt; &nbsp; &nbsp;&lt;/span&gt;&lt;/b&gt;&lt;/font&gt;&lt;/p&gt;&lt;div align=&quot;center&quot;&gt; &nbsp;&lt;table border=&quot;1&quot; cellPadding=&quot;0&quot; cellSpacing=&quot;0&quot; style=&quot;BORDER-BOTTOM: medium none&#59; BORDER-COLLAPSE: collapse&#59; BORDER-LEFT: medium none&#59; BORDER-RIGHT: medium none&#59; BORDER-TOP: medium none&#59; mso-table-layout-alt: fixed&#59; mso-border-alt: solid windowtext .5pt&#59; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt&quot;&gt; &nbsp; &nbsp;&lt;tbody&gt; &nbsp; &nbsp; &nbsp;&lt;tr style=&quot;HEIGHT: 41.2pt&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;td style=&quot;BORDER-BOTTOM: windowtext 0.5pt solid&#59; BORDER-LEFT: windowtext 0.5pt solid&#59; BORDER-RIGHT: windowtext 0.5pt solid&#59; BORDER-TOP: windowtext 0.5pt solid&#59; HEIGHT: 41.2pt&#59; PADDING-BOTTOM: 0cm&#59; PADDING-LEFT: 5.4pt&#59; PADDING-RIGHT: 5.4pt&#59; PADDING-TOP: 0cm&#59; WIDTH: 5cm&quot; width=&quot;189&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;材料&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/p&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/td&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;td style=&quot;BORDER-BOTTOM: windowtext 0.5pt solid&#59; BORDER-LEFT: medium none&#59; BORDER-RIGHT: windowtext 0.5pt solid&#59; BORDER-TOP: windowtext 0.5pt solid&#59; HEIGHT: 41.2pt&#59; PADDING-BOTTOM: 0cm&#59; PADDING-LEFT: 5.4pt&#59; PADDING-RIGHT: 5.4pt&#59; PADDING-TOP: 0cm&#59; WIDTH: 5cm&#59; mso-border-left-alt: solid windowtext .5pt&quot; width=&quot;189&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;等电位连接带之间和等电位连接带与接地装置之间的连接导体，流过大于或等于&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 25% &lt;/span&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;总雷电流的等电位连接导体&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/p&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/td&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;td style=&quot;BORDER-BOTTOM: windowtext 0.5pt solid&#59; BORDER-LEFT: medium none&#59; BORDER-RIGHT: windowtext 0.5pt solid&#59; BORDER-TOP: windowtext 0.5pt solid&#59; HEIGHT: 41.2pt&#59; PADDING-BOTTOM: 0cm&#59; PADDING-LEFT: 5.4pt&#59; PADDING-RIGHT: 5.4pt&#59; PADDING-TOP: 0cm&#59; WIDTH: 5cm&#59; mso-border-left-alt: solid windowtext .5pt&quot; width=&quot;189&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;内部金属装置与等电位连接带之间的连接导体，流过小于 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;25%&lt;/span&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 总雷电流的等电位连接导体&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/p&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/td&gt; &nbsp; &nbsp; &nbsp;&lt;/tr&gt; &nbsp; &nbsp; &nbsp;&lt;tr style=&quot;HEIGHT: 20pt&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;td style=&quot;BORDER-BOTTOM: windowtext 0.5pt solid&#59; BORDER-LEFT: windowtext 0.5pt solid&#59; BORDER-RIGHT: windowtext 0.5pt solid&#59; BORDER-TOP: medium none&#59; HEIGHT: 20pt&#59; PADDING-BOTTOM: 0cm&#59; PADDING-LEFT: 5.4pt&#59; PADDING-RIGHT: 5.4pt&#59; PADDING-TOP: 0cm&#59; WIDTH: 5cm&#59; mso-border-top-alt: solid windowtext .5pt&quot; width=&quot;189&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;铜&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/p&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/td&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;td style=&quot;BORDER-BOTTOM: windowtext 0.5pt solid&#59; BORDER-LEFT: medium none&#59; BORDER-RIGHT: windowtext 0.5pt solid&#59; BORDER-TOP: medium none&#59; HEIGHT: 20pt&#59; PADDING-BOTTOM: 0cm&#59; PADDING-LEFT: 5.4pt&#59; PADDING-RIGHT: 5.4pt&#59; PADDING-TOP: 0cm&#59; WIDTH: 5cm&#59; mso-border-left-alt: solid windowtext .5pt&#59; mso-border-top-alt: solid windowtext .5pt&quot; width=&quot;189&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;16&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/p&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/td&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;td style=&quot;BORDER-BOTTOM: windowtext 0.5pt solid&#59; BORDER-LEFT: medium none&#59; BORDER-RIGHT: windowtext 0.5pt solid&#59; BORDER-TOP: medium none&#59; HEIGHT: 20pt&#59; PADDING-BOTTOM: 0cm&#59; PADDING-LEFT: 5.4pt&#59; PADDING-RIGHT: 5.4pt&#59; PADDING-TOP: 0cm&#59; WIDTH: 5cm&#59; mso-border-left-alt: solid windowtext .5pt&#59; mso-border-top-alt: solid windowtext .5pt&quot; width=&quot;189&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;6&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/p&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/td&gt; &nbsp; &nbsp; &nbsp;&lt;/tr&gt; &nbsp; &nbsp; &nbsp;&lt;tr style=&quot;HEIGHT: 20pt&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;td style=&quot;BORDER-BOTTOM: windowtext 0.5pt solid&#59; BORDER-LEFT: windowtext 0.5pt solid&#59; BORDER-RIGHT: windowtext 0.5pt solid&#59; BORDER-TOP: medium none&#59; HEIGHT: 20pt&#59; PADDING-BOTTOM: 0cm&#59; PADDING-LEFT: 5.4pt&#59; PADDING-RIGHT: 5.4pt&#59; PADDING-TOP: 0cm&#59; WIDTH: 5cm&#59; mso-border-top-alt: solid windowtext .5pt&quot; width=&quot;189&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span style=&quot;mso-bidi-font-size: 10.0pt&#59; mso-ascii-font-family: Times New Roman&#59; mso-hansi-font-family: Times New Roman&quot;&gt;铝&lt;/span&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; 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mso-border-top-alt: solid windowtext .5pt&quot; width=&quot;189&quot;&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;p align=&quot;center&quot; style=&quot;LINE-HEIGHT: 110%&quot;&gt;&lt;font face=&quot;宋体&quot; size=&quot;2&quot;&gt;&lt;span lang=&quot;EN-US&quot; style=&quot;mso-bidi-font-size: 10.0pt&quot;&gt;16&lt;O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/O:P&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/span&gt;&lt;/font&gt;&lt;/p&gt; &nbsp; &nbsp; &nbsp; &nbsp;&lt;/td&gt; &nbsp; &nbsp; &nbsp;&lt;/tr&gt; &nbsp; &nbsp;&lt;/tbody&gt; &nbsp;&lt;/table&gt;&lt;/div&gt;&lt;p align=&quot;left&quot;&gt;&lt;font size=&quot;2&quot;&gt;&lt;br&gt;&lt;br&gt;　　铜或镀锌钢等电位连接带的截面不应小于 50mm2。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　当建筑物内有信息系统时，在那些要求雷击电磁脉冲影响最小之处，等电位连接带宜采用金属板，并与钢筋或其它屏蔽构件作多点连接。&lt;br&gt;　　在 LPZ0A 与 LPZ1 区的界面处做等电位连接用的接线夹和电涌保护器，应采用本规范附录六的附表6.1～附表6.3的雷电流参量估算通过它们的分流值。当无法估算时，可按以下方法确定：全部雷电流 i 的 50% 流入建筑物防雷装置的接地装置，其另50%，即is分配于引入建筑物的各种外来导电物、电力线、通信线等设施。流入每一设施的电流 ii 等于 is/n，n 为上述设施的个数。流经无屏蔽电缆芯线的电流 iv 等于电流 ii 除以芯线数 m，即 iv = ii/m（见图6.3.4-1）；对有屏蔽的电缆，绝大部分的电流将沿屏蔽层流走。尚应考虑沿各种设施引入建筑物的雷电流。应采用以上两值的较大者。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t634-1.jpg&quot; width=&quot;473&quot; height=&quot;349&quot;&gt;&lt;br&gt;&lt;br&gt;在 LPZ0B 与 LPZ1 区的界面处做等电位连接用的线夹和电涌保护器仅应按上述方法考虑雷闪击中建筑物防雷装置时通过它们的雷电流；可不考虑沿全长处在 LPZ0B 区的各种设施引入建筑物的雷电流，其值仅为感应电流和小部分雷电流。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　二、各后续防雷区界面处的等电位连接也应采用本条一款的一般原则。&lt;br&gt;　　穿过防雷区界面的所有导电物、电力线、通信线均应在界面处做等电位连接。应采用一局部等电位连接带做等电位连接，各种屏蔽结构或设备外壳等其它局部金属物也连到该带。&lt;br&gt;　　用于等电位连接的接线夹和电涌保护器应分别估算通过的雷电流。&lt;br&gt;　　三、所有电梯轨道、吊车、金属地板、金属门框架、设施管道、电缆桥架等大尺寸的内部导电物，其等电位连接应以最短路径连到最近的等电位连接带或其它已做了等电位连接的金属物，各导电物之间宜附加多次互相连接。&lt;br&gt;　　四、一信息系统的所有外露导电物应建立—等电位连接网络。由于按照本章规定实现的等电位连接网络均有通大地的连接，每个等电位连接网不宜设单独的接地装置。&lt;br&gt;　　一信息系统的各种箱体、壳体、机架等金属组件与建筑物的共用接地系统的等电位连接应采用以下两种基本形式的等电位连接网络之一（图6.3.4-2）：S 型星形结构和M型网形结构。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　当采用S型等电位连接网络时，信息系统的所有金属组件，除等电位连接点外，应与共用接地系统的各组件有大于 10kV、1.2/50μs 的绝缘。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　通常，S 型等电位连接网络可用于相对较小、限定于局部的系统，而且所有设施管线和电缆宜从ERP处附近进入该信息系统。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　S 型等电位连接网络应仅通过唯一的一点，即接地基准点ERP组合到共用接地系统中去形成 Ss 型等电位连接（图6.3.4-2）。在这种情况下，设备之间的所有线路和电缆当无屏蔽时宜按星形结构与各等电位连接线平行敷设，以免产生感应环路。用于限制从线路传导来的过电压的电涌保护器，其引线的连接点应使加到被保护设备上的电涌电压最小。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t634-2.jpg&quot; width=&quot;468&quot; height=&quot;481&quot;&gt;&lt;br&gt;&lt;br&gt;图6.3.4-2 信息系统等电位连接的基本方法 &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&lt;br&gt;当采用M型等电位连接网络时，一系统的各金属组件不应与共用接地系统各组件绝缘。M型等电位连接网络应通过多点连接组合到共用接地系统中去，并形成Mm型等电位连接。&lt;br&gt;　　通常，M型等电位连接网络宜用于延伸较大的开环系统，而且在设备之间敷设许多线路和电缆，以及设施和电缆从若干点进入该信息系统。&lt;br&gt;　　在复杂系统中，M 型和 S 型等电位连接网络这两种型式的优点可组合在一起，见图6.3.4-3。一个 S 型局部等电位连接网络可与一个M型网形结构组合在一起（见图6.3.4-3的组合1）。一个 M 型局部等电位连接网络可仅经一接地基准点 ERP 与共用接地系统相连（见图6.3.4-3的组合2），该网络的所有金属组件和设备应与共用接地系统各组件有大于 10kV、1.2/50μs 的绝缘，而且所有设施和电缆应从接地基准点附近进入该信息系统，低频率和杂散分布电容起次要影响的系统可采用这种方法。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 　　[说明] &nbsp;等电位连接的目的在于减小需要防雷的空间内各金属物与各系统之间的电位差。第四款：当采用 S 型等电位连接网络时，信息系统的所有金属组件应与共用接地系统的各组件有大于 10kV、1.2/50μs 的绝缘的例子见图6.3.4-4。加绝缘的目的是使外来的干扰电流不会进入所涉及的电子装置。&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t634-3.jpg&quot; width=&quot;485&quot; height=&quot;451&quot;&gt;&lt;br&gt;&lt;img src=&quot;http://asp.cn/img/50057/gb50057-94_t634-4.jpg&quot; width=&quot;385&quot; height=&quot;513&quot;&gt;&lt;br&gt;1 ──低阻抗电缆管道，建筑物共用接地系统的一个组合单元；&lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2 ──单点连接点与电缆管道之间的连接； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;3 ──LPZ2 区； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;4 ──LPZ3 区，由设备屏蔽外壳构成，即系统组 1 的机架； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;5、8 ──钢筋混凝土地面； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;6 ──等电位连接网络 1； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;7 ──等电位连接网络 1 与建筑物共用接地系统之间的绝缘物，其绝缘强度大于 10kV、1.2/50μs； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;9 ──电缆管道、等电位连接网络 1、系统组 2 与地面钢筋的等电位连接； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;10 ──单点连接点 1； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;11 ──LPZ1 区； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;12 ──连到机架的电缆金属屏蔽层； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;13 ──单点连接点 2； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;14 ──系统组 2； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;15 ──单点连接点 3； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;16 ──采用一般等电位连接的原有设备和装置； &lt;br&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;17 ──系统组 2 &lt;br&gt; &nbsp;

查看完整版本: [转帖]《建筑物防雷设计规范》GB50057-94 2000 年局部修订 6.3