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电气专业设计规范

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>态。</span></span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>　</span></span></font>3.5<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>　石油设备应采用防雷接地。防雷接地、防静电接地和电气设备接地宜共用同一</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>接地装置</span></span></font>(<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>参见</span></font>GB13348<font face=宋体><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>第</span></font>4.1<font face=宋体><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>条</span></font>)<font face=宋体><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>。</span></font></p>

<P class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.5pt'><span style='mso-bidi-font-size:10.0pt'><A NAME="A4"></A>4</span></span></font><font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>　预防雷电危害的技术措施</span></font></P>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>　</span></span></font>4.1<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>　金属油罐</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>　</span></span></font>4.1.1<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>　当贮存易燃、可燃油品的油罐，其顶板厚度小于</span></font>4mm<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>时，应装设防直击雷设</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>备，如避雷针或半导体消雷器等。其中单支避雷针保护范围的确定参见附录</span></span></font>A<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，其它情</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>况下保护范围的确定详见</span></span></font>GB50057<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>附录四。半导体消雷器保护范围的确定参见附录</span></font>B<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>。</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>　</span></span></font>4.1.2<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>　当贮存易燃、可燃油品的油罐，其顶板厚度大于、等于</span></font>4mm<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>时，按</span></font>GBJ74<font face=宋体><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>第</span></font></p>

<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.5pt'><span style='mso-bidi-font-size:10.0pt'>11.2.2</span></span></font><font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>条规定，可不装设防直击雷设备。但在多雷区</span></font>(<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>注</span></font>)<font face=宋体><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，当油罐顶板厚度大</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>于、等于</span></span></font>4mm<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>时，仍可装设防直击雷设备。</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>　　注：多雷区通常指年雷暴日大于</span></span></font>40<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>天的地区，参见附录</span></font>C<font face=宋体><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>。</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>　</span></span></font>4.13<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>　金属油罐必须作环型防雷接地，其接地点不应少于两处，其间弧形距离不应</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>大于</span></span></font>30m<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>。接地体距罐壁的距离应大于</span></font>3m<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，当罐顶装有避雷针或利用罐体作接闪器时，</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>每一接地点的冲击接地电阻不应大于</span></span></font>10<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>Ω。</span></font></p>

<p class=MsoNormal><font size=2 face=宋体><span lang=ZH-CN style='font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'><span style='mso-bidi-font-size:10.0pt'>　</span></span></font>4.1.4<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>　浮顶金属油罐可不装设防直击雷设备，但必须用两根截面不小于</span></font>25mm<font
face=宋体><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>