wuxy2005 发表于 2011-8-29 11:05:00

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<?xml:namespace prefix = p ns = "urn:schemas-microsoft-com:office:powerpoint" /><p:colorscheme colors="#339933,#ffffff,#000000,#ffffff,#faba1a,#13d3f9,#938bfd,#efcf0f"></p:colorscheme>&nbsp;
<div class="O" style="TEXT-ALIGN: center; mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1" v:shape="_x0000_s1026"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><p:colorscheme colors="#339933,#ffffff,#000000,#ffffff,#faba1a,#13d3f9,#938bfd,#efcf0f"></p:colorscheme>&nbsp; </div>
<div class="O" style="TEXT-ALIGN: center; mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1" align="left" v:shape="_x0000_s1026"><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳型电流表是一种用于测量正在运行的电气线路的电流大小的仪表，可在不断电的情况下测量电流</span></div>
<div class="O" style="TEXT-ALIGN: center; mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1" v:shape="_x0000_s1026"><p:colorscheme colors="#339933,#ffffff,#000000,#ffffff,#faba1a,#13d3f9,#938bfd,#efcf0f"></p:colorscheme>&nbsp;
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">通常用普通电流表测量电流时，需要将电路切断停机后才能将电流表接入进行测量，这是很麻烦</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">的，有时正常运行的电动机不允许这样做。此时，使用钳形电流表就显得方便多了，可以在不</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">切断电路的情况下来测量电流。钳形电流表工作原理如下：<br/></span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳形电流表是由电流互感器和电流表组合而成。电流互感器的铁心在捏紧扳手时可以张开；被</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测电流所通过的导线可以不必切断就可穿过铁心张开的缺口，当放开扳手后铁心闭合。穿过铁</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">心的被测电路导线就成为电流互感器的一次线圈，其中通过电流便在二次线圈中感应出电流。</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">从而使二次线圈相连接的电流表便有指示</span><span lang="EN-US" style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">-----</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测出被测线路的电流。钳形表可以通过转换开关</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">的拨档，改换不同的量程。但拨档时不允许带电进行操作。钳形表一般准确度不高，通常为</span><span lang="EN-US" style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">2.5</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">～</span><span lang="EN-US" style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">5</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">级。为了使用方便，表内还有不同量程的转换开关供测不同等级电流以及测量电压的功</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">能。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><p:colorscheme colors="#339933,#ffffff,#000000,#ffffff,#faba1a,#13d3f9,#938bfd,#efcf0f"></p:colorscheme>&nbsp; </div>
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '180 20="20"0'"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳型表的工作原理和变压器一样。</span><span style="FONT-SIZE: 14pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> <br/></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><br/></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">初级线圈就是穿过钳型铁芯的导线，相当于</span><span lang="EN-US" style="FONT-SIZE: 14pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">1</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">匝的变压器的一次线圈，这是一个升压变压器。</span><span style="FONT-SIZE: 14pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> <br/></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><br/></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">二次线圈和测量用的电流表构成二次回路。</span><span style="FONT-SIZE: 14pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> <br/></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><br/></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">当导线有交流电流通过时，就是这一匝线圈产生了交变磁场，在二次回路中产生了感应电流，电流的大小和</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">一次电流的比例，相当于一次和二次线圈的匝数的反比。</span><span style="FONT-SIZE: 14pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> <br/></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><br/></span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳型电流表用于测量大电流，如果电流不够大，可以将一次导线在通过钳型表增加圈数，同时将测得的电流</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">数除以圈数。</span><span style="FONT-SIZE: 14pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span></div>
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'">基本构成：<p:colorscheme colors="#339933,#ffffff,#000000,#ffffff,#faba1a,#13d3f9,#938bfd,#efcf0f"></p:colorscheme>&nbsp; </div>
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 133%"><span style="LEFT: -6.95%; COLOR: #faba1a; POSITION: absolute; mso-special-format: bullet; mso-color-index: 4">?</span></span><span style="FONT-SIZE: 24pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">电流互感器 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 133%"><span style="LEFT: -6.95%; COLOR: #faba1a; POSITION: absolute; mso-special-format: bullet; mso-color-index: 4">?</span></span><span style="FONT-SIZE: 24pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳形扳手 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 133%"><span style="LEFT: -6.95%; COLOR: #faba1a; POSITION: absolute; mso-special-format: bullet; mso-color-index: 4">?</span></span><span style="FONT-SIZE: 24pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">数字显示屏 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 133%"><span style="LEFT: -6.95%; COLOR: #faba1a; POSITION: absolute; mso-special-format: bullet; mso-color-index: 4">?</span></span><span style="FONT-SIZE: 24pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">红黑电表笔 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 133%"><span style="LEFT: -6.95%; COLOR: #faba1a; POSITION: absolute; mso-special-format: bullet; mso-color-index: 4">?</span></span><span style="FONT-SIZE: 24pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">工作干电池</span></div></div></span></div>
<div class="O" v:shape="_x0000_s1026"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><p:colorscheme colors="#339933,#ffffff,#000000,#ffffff,#faba1a,#13d3f9,#938bfd,#efcf0f"></p:colorscheme>&nbsp;
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">使用方法：（</span><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">1</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">）测量前要检查电流表壳体</span><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">,</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">表笔是否有破损</span><span style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（</span><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">2</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">）选择合适的量程，先选大，后选小量程或看铭牌值估算。不知道的情况</span><span style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">下需要估</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">算</span><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">. </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（</span><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">3</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">）当使用最小量程测量，其读数还不明显时，可将被测导线绕几匝，匝数要以钳口</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">中央的匝数为准，则读数＝指示值×量程</span><span style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> / </span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">满偏×匝数</span><span style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（</span><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">4</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">）测量时，应使被测导线处在钳口的中央，并使钳口闭合紧密，以减少误</span><span style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">差。</span><span style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（</span><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">5</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">）测量完毕，要将转换开关放在最在量程处。</span><span style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span></div>
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<div style="TEXT-ALIGN: center; mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '100 50="50"0'"><p:colorscheme colors="#339933,#ffffff,#000000,#ffffff,#faba1a,#13d3f9,#938bfd,#efcf0f"></p:colorscheme>&nbsp;
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '125 20="20"0'"><span style="LEFT: -3.5%; COLOR: #faba1a; POSITION: absolute; mso-special-format: bullet; mso-color-index: 4">?</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳形电流表分高、低压两种，用于在不拆断线路的情况下直接测量线路中的电流。</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">其使用方法如下： </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '125 20="20"0'"><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"></span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（１）</span><span style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">使用高压钳形表时应注意钳形电流表的电压等级，严禁用低压钳形表测量高电压回路的电</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">流。用高压钳形表测量时，应由两人操作，非值班人员测量还应填写第二种工作票，测量时应</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">戴绝缘手套，站在绝缘垫上，不得触及其它设备，以防止短路或接地。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（２）</span><span style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">观测表计时，要特别注意保持头部与带电部分的安全距离，人体任何部分与带电体的距离</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">不得小于钳形表的整个长度。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（３）</span><span style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">在高压回路上测量时，禁止用导线从钳形电流表另接表计测量。测量高压电缆各相电流</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">时，电缆头线间距离应在３００</span><span lang="EN-US" style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">mm</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">以上，且绝缘良好，待认为测量方便时，方能进行。 </span></div>
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（４）</span><span style="FONT-SIZE: 24pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测量低压可熔保险器或水平排列低压母线电流时，应在测量前将各相可熔保险或母线用绝</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">缘材料加以保护隔离，以免引起相间短路。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（５）</span><span style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">当电缆有一相接地时，严禁测量。防止出现因电缆头的绝缘水平低发生对地击穿爆炸而危</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">及人身安全。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '200 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">（６）</span><span style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳形电流表测量结束后把开关拔至最大程档，以免下次使用时不慎过流；并应保存在干燥</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">的室内。 </span></div>
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">1.</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测量前首先必须熟悉钳形电流表面板上各种符号、数字所代表的意义 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">2.</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳形电流表应保存在干燥的室内，使用前要擦拭干净。携带使用时不应受到</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">强烈振动。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">3.</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">使用钳型电流表测量线路中的电流时，被测线路的电压与钳型电流表的额定</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">电压应在同一等级，切不可测量高于该表额定电压的线路，否则会损坏仪</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">表，甚至造成人身触电事故。如一位刚上岗不久的电工，使用</span><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">0</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">．</span><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">4kV</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">的钳</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">型电流表在配变台上测低压侧电流时，误测成高压倒（</span><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">10kV</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">）的电流，结</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">果仪表绝缘击穿损坏，造成人身触电事故。 </span></div>
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '145 20="20"0'"><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">4.<span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测量前先估计被测电流的大小，然后选择适当的量程进行测量，不可用小量程测量大</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">电流。可先选择较大的量程进行测量，然后再根据被测电流的大小选择适当的量程。</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">如果被测电流较小，为减小测量误差，可把被测导线绕几圈放置钳口的中央进行，</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">表上读数除以放进钳日中导线的匝数即为实测电流。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '145 20="20"0'"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN"></span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '145 20="20"0'"><span lang="EN-US" style="mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">5.<span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测量电流时应一根一根地测量，不可一次测两根或三根线中的电流。把被测导线放置</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">钳口的中央．使钳口的两个面紧密结合。如果钳口上有污垢，应先清除再测量，使</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测得的数值接近实际数值。如测量大电流后立即去测量小电流，应开合铁芯数次，</span><span style="FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">以消除铁芯中剩磁，减小误差。</span><span style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span></div>
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">6.<span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测量低压母线等裸露导体的电流时，测量前应将临近各相用绝缘物隔开，以防钳口张开触及临</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">近导体，引起相间短路。并且在测量时戴绝缘手套，站在绝缘垫子上，不得触及其他设备，以</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">防短路或接地。观察测量值时，要特别注意保持头部与带电部分的安全距离。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"></span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN"><span style="mso-spacerun: yes">&nbsp;</span>7.<span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">在测量三相交流电时，夹住一根相线测得的是本相线电流值；夹住二根相线读数为第三相线电</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">流值；夹住三根相线时，如果三相平衡，则读数为零，若有读数则表示三相不平衡，读出的是</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">中性线的电流值</span><span lang="EN-US" style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">,</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">夹住两根，是指三条线距离很近的时候。比如在电机接线盒附件，接触器附近</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">等，夹住两根还是很容易的。注意测的时候，必须使导线和钳口垂直，并且钳口要合好，也就</span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">是要让钳口呈环形绕在线的四周。</span><span style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"> </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN"></span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 16pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN"><span style="mso-spacerun: yes">&nbsp;</span>8.<span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测量时不准改换量程。需要改换量程时，把被测导线从钳口中退出后方可进行。</span><span style="FONT-SIZE: 14pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span></span></div></div></div>
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<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">9.</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">使用钳型电流表时应戴绝缘手套，穿绝缘鞋，潮湿和雷雨天气不可在室外使</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">用。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">10.</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">一般的钳形表不得用于高电压测量。附有交流电压测量的钳形电流表，在测</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">量电流、电压时应分别进行，不得同时测量。 </span></div>
<div style="mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '155 20="20"0'"><span lang="EN-US" style="FONT-SIZE: 20pt; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN">11.</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">测量完毕，一定把开关放在最大量程的档位，以免下次使用时未经选择量程</span><span style="FONT-SIZE: 20pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial">而被测电流又较大而损坏仪表。 </span></div>
<div style="TEXT-ALIGN: center; mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: '100 50="50"0'"></div></div></div></div></div></span></div>
<div class="O" style="TEXT-ALIGN: center; mso-margin-left-alt: 216; mso-char-wrap: 1; mso-kinsoku-overflow: 1" align="left" v:shape="_x0000_s1026"><span style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial"></span>&nbsp;</div>
[此贴子已经被作者于2011/8/29 11:12:43编辑过]

wuxy2005 发表于 2011-8-29 11:14:00

<p>上述帖子，无法用附件方式上传，且无法编辑排版。给各位的观看带来不便，还请见谅！也请管理员或版主能指点在下。</p>
<p>&nbsp;</p>

zxg1117 发表于 2012-11-11 15:13:00

<p>我们也有，但是从来没有用过。</p>
<p>&nbsp;</p>

qq1263804237 发表于 2012-11-14 13:43:00

<p>能附图吗</p>
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