📄 dlt 621-1997.html
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<TITLE>交流电气装置的接地 DL/T 621-1997(电力)</TITLE>
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<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'> </b><b style='mso-bidi-font-weight:normal'><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>交流电气装置的接地</span></b><b
style='mso-bidi-font-weight:normal'><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'>Grounding</b><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'>
</span><b style='mso-bidi-font-weight:normal'>for</b><span style='font-family:
宋体;mso-hansi-font-family:"Times New Roman"'> </span><b style='mso-bidi-font-weight:
normal'>AC</b><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'>
</span><b style='mso-bidi-font-weight:normal'>edectrical</b><span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span><b
style='mso-bidi-font-weight:normal'>insfallations</b><b style='mso-bidi-font-weight:
normal'><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'>DL/T</b><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'>
</span><b style='mso-bidi-font-weight:normal'>621</b><b style='mso-bidi-font-weight:
normal'><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>—</span>1997</b><b style='mso-bidi-font-weight:
normal'><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'> </b><b style='mso-bidi-font-weight:normal'><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>中华人民共和国电力行业标准</span></b><b
style='mso-bidi-font-weight:normal'><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'> </b><b style='mso-bidi-font-weight:normal'><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>交流电气装置的接地</span></b><b
style='mso-bidi-font-weight:normal'><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=right style='text-align:right'><b style='mso-bidi-font-weight:
normal'>DL/</b><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'>
</span><b style='mso-bidi-font-weight:normal'>T</b><span style='font-family:
宋体;mso-hansi-font-family:"Times New Roman"'> </span><b style='mso-bidi-font-weight:
normal'>621</b><b style='mso-bidi-font-weight:normal'><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>—</span>1997</b><b style='mso-bidi-font-weight:normal'><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'>Grounding</b><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'>
</span><b style='mso-bidi-font-weight:normal'>for</b><span style='font-family:
宋体;mso-hansi-font-family:"Times New Roman"'> </span><b style='mso-bidi-font-weight:
normal'>AC</b><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'>
</span><b style='mso-bidi-font-weight:normal'>electrical</b><span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span><b
style='mso-bidi-font-weight:normal'>installations</b><b style='mso-bidi-font-weight:
normal'><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal> <span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>中华人民共和国电力工业部</span>1997-09-02</b><b
style='mso-bidi-font-weight:normal'><span lang=ZH-CN style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>批准</span></b><span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun:
yes">
</span></span><b style='mso-bidi-font-weight:normal'>1998-01-01</b><b
style='mso-bidi-font-weight:normal'><span lang=ZH-CN style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>实施</span></b><b
style='mso-bidi-font-weight:normal'><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></p>
<p class=MsoNormal> <span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal> <span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<P class=MsoNormal align=center style='text-align:center'><b style='mso-bidi-font-weight:
normal'><span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'><A NAME="A1"></A>前 言</span></b><b style='mso-bidi-font-weight:
normal'><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></b></P>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>本标准是根据原水利电力部</span>1979<span lang=ZH-CN style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>年</span>1<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>月颁发的</span>SDJ8<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>—</span>79<span lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>《电力设备接地设计技术规程》和</span>1984<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>年</span>3<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>月颁发的</span>SD119<span lang=ZH-CN style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>—</span>84<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>《</span>500kV<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>电网过电压保护绝缘配合与电气设备接地暂行技术标准》，经合并、修订之后提出的。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span><span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>本标准较修订前的两个标准有如下重要技术内容的改变：</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>1)<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>增加了电阻接地系统交流电气装置保护接地接地电阻的规定；</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>2)<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>修订了有效接地系统接地装置接地线热稳定校验的规定；提出</span>3<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>～</span>66kV<span lang=ZH-CN
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>不接地、消弧线圈接地和高电阻接地系统进行异地两相短路接地线热稳定校验的要求；</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>3)<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>补充了接地网非等间距布置时的接地网接触电位差、跨步电位差的计算方法；</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>4)<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>修订了杆塔接地装置和自然接地极冲击系数的计算方法；</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>5)<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span><span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>提出接地装置耐腐蚀的工作寿命的要求；</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes"> </span></span>6)<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span><span
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