dlt 621-1997.html

电气专业设计规范

<p class=MsoNormal><span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </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"'>接地短路</span>(<span lang=ZH-CN style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>故障</span>)<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>电流流过接地装置时，地面上水平距离为</span>0.8m<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>的两点间的电位差，称为跨步电位差。接地网外的地面上水平距离</span>0.8m<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>处对接地网边缘接地极的电位差，称为最大跨步电位差。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>2.15<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp; </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"'>转移电位</span><span style='font-family:宋体;mso-hansi-font-family:
"Times New Roman"'><span style="mso-spacerun: yes">&nbsp; </span></span>diverting<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>potential<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">&nbsp;&nbsp;&nbsp; </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"'>接地短路</span>(<span lang=ZH-CN style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>故障</span>)<span
lang=ZH-CN style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>电流流过接地装置时，由一端与接地装置连接的金属导体传递的接地装置对地电位。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>2.16<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp; </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"'>外露导电部分</span><span style='font-family:宋体;mso-hansi-font-family:
"Times New Roman"'><span style="mso-spacerun: yes">&nbsp; </span></span>exposed<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>conductive<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>part<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">&nbsp;&nbsp;&nbsp; </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"'>平时不带电压，但故障情况下能带电压的电气装置的容易触及的导电部分。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>2.17<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp; </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"'>装置外导电部分</span><span style='font-family:宋体;mso-hansi-font-family:
"Times New Roman"'><span style="mso-spacerun: yes">&nbsp; </span></span>extraneous<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>conductive<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>part<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">&nbsp;&nbsp;&nbsp; </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"'>不属电气装置组成部分的导电部分。</span><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>2.18<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp; </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"'>中性线</span><span style='font-family:宋体;mso-hansi-font-family:
"Times New Roman"'><span style="mso-spacerun: yes">&nbsp; </span></span>neutral<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>conductor<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">&nbsp;&nbsp;&nbsp; </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"'>与低压系统电源中性点连接用来传输电能的导线。</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>2.19<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp; </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"'>保护线</span><span style='font-family:宋体;mso-hansi-font-family:
"Times New Roman"'><span style="mso-spacerun: yes">&nbsp; </span></span>protective<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>conductor<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">&nbsp;&nbsp;&nbsp; </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"'>低压系统中为防触电用来与下列任一部分作电气连接的导线：</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">&nbsp;&nbsp;&nbsp; </span></span>a)<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"'>线路或设备金属外壳；</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">&nbsp;&nbsp;&nbsp; </span></span>b)<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"'>线路或设备以外的金属部件；</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">&nbsp;&nbsp;&nbsp; </span></span>c)<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"'>总接地线或总等电位连接端子板；</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">&nbsp;&nbsp;&nbsp; </span></span>d)<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"'>接地极；</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">&nbsp;&nbsp;&nbsp; </span></span>e)<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"'>电源接地点或人工中性点。</span><span
style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>2.20<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp; </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"'>保护中性线</span><span style='font-family:宋体;mso-hansi-font-family:
"Times New Roman"'><span style="mso-spacerun: yes">&nbsp; </span></span>PEN<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>conductor<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">&nbsp;&nbsp;&nbsp; </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"'>具有中性线和保护线两种功能的接地线。</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>2.21<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp; </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"'>等电位连接</span><span style='font-family:宋体;mso-hansi-font-family:
"Times New Roman"'><span style="mso-spacerun: yes">&nbsp; </span></span>equipotential<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>bonding<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">&nbsp;&nbsp;&nbsp; </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"'>各外露导电部分和装置外导电部分的电位实质上相等的电气连接。</span><span style='mso-bidi-font-size:
10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>2.22<span style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'><span
style="mso-spacerun: yes">&nbsp; </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"'>等电位连接线</span><span style='font-family:宋体;mso-hansi-font-family:
"Times New Roman"'><span style="mso-spacerun: yes">&nbsp; </span></span>equiptential<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>bounding<span
style='font-family:宋体;mso-hansi-font-family:"Times New Roman"'> </span>conductor<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">&nbsp;&nbsp;&nbsp; </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"'>为确保等电位连接而使用的保护线。</span><span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>

<p class=MsoNormal>&nbsp;<span style='mso-bidi-font-size:10.0pt'><o:p></o:p></span></p>