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*(设计序列号)* *(管径mm) **(特殊服务环境代码，0 g L4 G# i(N5 U z TH湿热带型；TA干燥热带型；未指明一般类型) </p> <p> 二、结构和工作原理 </p> <p> 1.气体继电器的结构 </p> <p> QJ继电器的结构基本相同，除了QJ4-25的跳闸信号为单触点式，其他为双触点式。继电器核心结构如图所示。继电器芯的上部由开口杯(浮子)3、重物4、磁铁6和干簧触点10组成，形成作用于信号的气体容积装置，而下部由挡板5、弹簧8、调节杆9、磁铁6和干簧触点10组成，形成作用于跳闸的流量装置。盖上的气塞1用于安装时排气，运行时抽出故障气体。探头2用于检查跳闸机构的灵活性和可靠性。 </p> <p> 1空气塞2探针3开口杯(浮子)4重锤5挡板6磁铁7端子8弹簧9调节杆10干燥弹簧触点 </p> <p> 2.气体继电器的工作原理 </p> <p> 继电器正常工作时，其内部充满干式变压器油，开口杯(浮子)处于图1所示的向上倾斜位置。当干式变压器出现轻微故障时，干式变压器油分解产生的气体聚集在继电器上部的气室中，迫使其油位下降，开口杯3下降到一定位置，其上的磁铁6吸引干式弹簧触点10，连接信号电路，发出报警信号。如果油箱中的油位下降，它也会作用在信号电路上，发出报警信号。当干式变压器发生严重故障时，油箱内的压力会瞬间升高，从而引起油涌。当挡板5旋转到一定的极限位置时，其上的磁铁6会吸引干式弹簧触头10，接通跳闸电路，并在没有预先警告的情况下直接切断干式变压器的电源，从而起到保护干式变压器的作用。 </p> <p> 信号接线图： </p> <p> 1来源：互联网 </p></p> <div class="1zlx7hpjjv5" id="prevnext"> <span>上一篇：<a href="/cpzs/3577.html">变电站基础知识</a> </span>????? <span>下一篇：<a href="/cpzs/3579.html">SCB10-3150KVA干式变压器</a></span> </div> </div> </div>   <div id="1zlx7hpjjv5" class="sub_right"> <div id="1zlx7hpjjv5" class="listcon"> <h3>热点关注</h3> 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