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target="_blank">电气百科</a> >> <span>正文</span></div> <!-- main_content begin--> <div class="maincontent"> <!-- left begin --> <div class="news_left"> <div class="brand_news_details"> <h1>电气百科:相序表、钳形电流表、绝缘电阻表的使用方法图解以及使用注意事?/h1><table style="border-bottom:1px dotted #e4e4e4;" align="center"><tr><td><div class="news_mes">文章来源:一线电工八千里 作者:??点击?span id="HitNum"></span>?时间?span id="dTime">2021/1/28 14:31:19</span><input type="hidden" id="ID" value="100923311"/><input type="hidden" id="TypeID" value="2"/></div> </td> <td><div id="ckepop"></div></td></tr></table><div id="Content" style="display:none;">[电气百科:相序表、钳形电流表、绝缘电阻表的使用方法图解以及使用注意事项]:二、相序表是我们经常在电气测试过程中用作测量电压三相相序的仪表。使用注意:1 ?、使用前注意观察仪表电压测量等级,被测电压不要超过该电压等级,以防仪表损坏;2 ?、使用过程中务必让表笔与测量点之?..</div><div class="brand_news_con"><p style="text-indent:2em;"> 二、相序表是我们经常在电气测试过程中用作测量电压三相相序的仪表?</p> <p style="text-indent:2em;"> 使用注意?</p> <p style="text-indent:2em;"> 1 ?、使用前注意观察仪表电压测量等级,被测电压不要超过该电压等级,以防仪表损坏; </p> <p style="text-indent:2em;"> 2 ?、使用过程中务必让表笔与测量点之前充分接触; </p> <p style="text-indent:2em;"> 3 ?、使用过程中不要用手触碰表笔金属头,确保人身安全?</p> <p style="text-indent:2em;"> 4 ?、单人使用该仪表时,尽量使用鳄鱼夹接触测量点?</p> <p style="text-indent:2em;"> 5 ?、使用完成后,仪表不宜与其他金属工具等混合放置在工具包中,以防屏幕、金属表笔的损坏?</p> <p style="text-align:center;text-indent:2em;"> <img src="http://oss.cnelc.com/kindeditor/img/20210128/20210128143033_6792.png" alt="" /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> 三、钳形表可以在不中断负载运行的条件下测量低压线路上的交、直流电流?</p> <p style="text-indent:2em;"> 1、采用电磁式电流互感器制作的钳形表,只能测量交流电流,不能测量直流电?、采用霍尔电流传感器制作的钳形表,可以测量交直流电流?</p> <p style="text-indent:2em;"> 四、绝缘电阻测试仪(摇?兆欧表)?</p> <p style="text-indent:2em;"> 绝缘电阻是设备安全要求测试中的一项重要指标,它可以判断绝缘体足否完整以及绝缘体表面是否被污染,通过测量设备的绝缘电阻可以及时发现设备普遍受潮、绝缘劣化和绝缘击穿等缺陷?</p> <p style="text-indent:2em;"> 摇表又称兆欧表,是用来测量被测设备的绝缘电阻和高值电阻的仪表,它由一个手摇发电机、表头和三个接线柱(即L:线路端、E:接地端、G:屏蔽端)组成,其用途是测试线路或电气设备的绝缘状况。使用方法及注意事项如下?</p> <p style="text-indent:2em;"> 1、首先选用与被测元件电压等级相适应的摇表,对于500V及以下的线路或电气设备,应使?00V?000V的摇表。对?00V以上的线路或电气设备,应使用1000V?500V的摇表?</p> <p style="text-indent:2em;"> 2、用摇表测试高压设备的绝缘时,应由两人进行?</p> <p style="text-indent:2em;"> 3、测量前必须将被测线路或电气设备的电源全部断开,即不允许带电测绝缘电阻。并且要查明线路或电气设备上无人工作后方可进行?</p> <p style="text-indent:2em;"> 4、摇表使用的表线必须是绝缘线,且不宜采用双股绞合绝缘线,其表线的端部应有绝缘护套;摇表的线路端子"L"应接设备的被测相,接地端?E"应接设备外壳及设备的非被测相,屏蔽端?G"应接到保护环或电缆绝缘护层上,以减小绝缘表面泄漏电流对测量造成的误差?</p> <p style="text-indent:2em;"> 5、测量前应对摇表进行开路校检。摇?L"端与"E"端空载时摇动摇表,其指针应指??;摇?L"端与"E"端短接时,摇动摇表其指针应指??。说明摇表功能良好,可以使用?</p> <p style="text-indent:2em;"> 6、测试前必须将被试线路或电气设备接地放电。测试线路时,必须取得对方允许后方可进行?</p> <p style="text-indent:2em;"> 7、测量时,摇动摇表手柄的速度要均匀120r/min为宜;保持稳定转?min后,取读数,以便躲开吸收电流的影响?</p> <p style="text-indent:2em;"> 8、测试过程中两手不得同时接触两根线?</p> <p style="text-indent:2em;"> 9、测试完毕应先拆线,后停止摇动摇表。以防止电气设备向摇表反充电导致摇表损坏?</p> <p style="text-indent:2em;"> 10、测试完毕,测试物及时对地放电?</p> <p style="text-indent:2em;"> 11?雷电时,严禁测试线路绝缘?</p> <p style="text-indent:2em;"> 使用注意?</p> <p style="text-indent:2em;"> 1、测量前必须将被测设备电源切断,并对地短路放电。决不能让设备带电进行测量,以保证人身设备安全;对电缆等容性较大的被测设备,测试完后要及时对地短路放电?</p> <p style="text-indent:2em;"> 2、摇表是靠自身发电产生电流来测量电阻的,被测物体不得带电,测试前就要先放电,不然会影响测试结果?</p> <p style="text-indent:2em;"> 3、摇表使用时,应放在平稳、牢固的地方,远离大的电流导体和外磁场; </p> <p style="text-indent:2em;"> 4、摇动兆欧表时,不能用手接触兆欧表的接线柱和5?80伏电动机一般用500伏或1000伏兆欧表?</p> <p style="text-indent:2em;"> 6、被测物表面要清洁,减少接触电阻,确保测量的精确性、正确性; </p></div><div class="meneame"><span class="disabled">< </span><span class="current">1</span> <span class="disabled">> </span></div> <div style="text-align: center;padding-top: 10px;"><img src="/images/code.jpg" alt="关注有惊?" /></div> <div class="news_bot_mes">中国工业电器网:此内容转载于合作媒体或互联网其它网站,中国工业电器网登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述!</br>新闻、技术文章投稿QQ?28246603 邮箱:news@cnelc.com</div> <h2 class="related">相关阅读</h2> <ul class="related_con"> <li>· <a href="/text/32/210128/AD100923311_1.html" target="_blank">电气百科:相序表、钳形电流表、绝缘电阻表</a></li><li>· <a href="/text/32/210128/AD100923310_1.html" 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