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晨飞资讯</a> » <a href="/Article/gaopinbianyaqideshiy_1.html">高频变压器的试验要注意哪些安全问题？</a></div>
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高频变压器的试验要注意哪些安全问题？</h3>
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<span>文章出处?a href=""><a href="http://cfdz.nsw888.com">深圳市晨飞电子有限公?/a></a></span><span>网责任编辑：<a href="http://cfdz.nsw888.com">NSW</a></span><span>作者：<a href="http://cfdz.nsw888.com">NSW</a></span><span>人气?span
id="cntrHits">-</span></span><span>发表时间?014-09-17 13:46:00</span>
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<p> <span style="font-size: 16px">一、绝缘电?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 变压器各绕组及绕组与铁心、静电屏蔽层之间的绝缘电阻在常态下均应大于1000M欧，一、绝缘电?变压器各绕组及绕组与铁心、静电屏蔽层之间的绝缘电阻在常态下均应大于1000M欧。高温实验和稳定温热实验后应不低?0M?IEC-65规则为不低于4M?测试绝缘电阻的直流电压为500V</span></p>
<p> </p>
<p><span style="font-size: 16px"> 二、抗电强?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 变压器初级与次级绕组、铁心、静电屏蔽层之间应能接受频度50Hz3500V有效?电压效果(IEC-65规则的实验电压为3000V有效?次级绕组与铁心、静电屏蔽之间应能接受频?0Hz1000V有效?电压的效果而无击穿和飞弧。限制电流为1mA 该值视变压器功率而定，最大不超过10mA?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 三、感应电感电压实?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 1.次级绕组加规则电流的继续时间实验</span></p>
<p> </p>
<p><span style="font-size: 16px"> 变压器应在次级各绕组负载到达规则电流的条件下，继续作业整15天?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 2.次级绕组带负载时不该呈现的情?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 次级绕组带负载时，下列任何一种条件下均不该出现失火或电击的风险：</span></p>
<p> </p>
<p><span style="font-size: 16px"> a..次级绕组短路?/span></p>
<p> </p>
<p><span style="font-size: 16px"> b.次级绕组负荷到电流等于额定电流加上短路电流与额定电流之差?5%</span></p>
<p> </p>
<p><span style="font-size: 16px"> c.次级绕组负荷到电流等于额定电流加上短路电流与额定电流之差?0%</span></p>
<p> </p>
<p><span style="font-size: 16px"> d.次级绕组负荷到电流等于额定电流加上短路电流与额定电流之差?5%</span></p>
<p> </p>
<p><span style="font-size: 16px"> e.次级绕组负荷到电流等于额定电流加上短路电流与额定电流之差?0%</span></p>
<p> </p>
<p><span style="font-size: 16px"> f.次级绕组负荷到电流等于额定电流加上短路电流与额定电流之差?5%</span></p>
<p> </p>
<p><span style="font-size: 16px"> g.次级绕组负荷到电流等于额定电流加上短路电流与额定电流之差?0%</span></p>
<p> </p>
<p><span style="font-size: 16px"> h.次级绕组负荷到电流等于额定电流加上短路电流与额定电流之差?%</span></p>
<p> </p>
<p><span style="font-size: 16px"> 次级绕组负荷到额定电流?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 3.短路电流的测?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 于室温下，变压器初级施加电压约为1min后丈量短路电流?/span><strong><a href="http://www.chenfeipower.com/Products/ER28gaopinbianyaqili.html"><span style="font-size: 16px">高频变压?/span></a></strong><span style="font-size: 16px">如有外部维护装置(如限温熔断器)则在丈量时须将其短路。假?0A 线路熔断器或变压器绕组在加上初级电压?min之内断开，则认为短路电流即是线路熔断器或绕组在断开前一会儿记录到电流值。使命一绕组的短路电流有必要在其他次级绕组开路时丈量?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 4.进行15天不正常作业实验的样品有必要按以下规则进行预备：</span></p>
<p> </p>
<p><span style="font-size: 16px"> a.变压器有必要旋转在红色薄棉纸掩盖的软木台面上?/span></p>
<p> </p>
<p><span style="font-size: 16px"> b.外露的不带电金属零件和每一个次级绕组的一端有必要经过1A 疾速熔断器接地?/span></p>
<p> </p>
<p><span style="font-size: 16px"> c.有必要用单层薄纱布松松地掩盖在变压器上或其独自的外壳上?/span></p>
<p> </p>
<p><span style="font-size: 16px"> d.变压器有必要经过30A 熔断器连接到规则电源的电路上?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 5.每一?5天不正常作业实验有必要继续进行到出现失火的风?即被试电路熔??5天停止?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 6.实验时，假如薄纱布或薄纸火热或起火，1A 熔断器断开，或呈现击穿，实验效果就不能采用?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 7.实验后仍在热状态下，变压器接受50Hz~1000V抗电强度实验。实验电压有必要在完结不正常作业实验后约1min加到变压器上?/span></p>
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