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id="1zlx7hpjjv5" class="right">文章来源:<a href="">北京创联汇通电气</a> ????? 发布时间： 2023-10-13 11:48:25</div> </div> <div class="1zlx7hpjjv5" id="daodu"><span>导读：</span>差动?；さ幕驹恚罕溲蛊鞑疃；な前囱返缌髟砉钩傻?，它能正确区分变压器内、外故障，并能瞬时切除保护区内的故障。变压器两侧分别装设电流互感器TA1和TA2，其二次线圈按环流原则相串联，差动继电器接在差流回路上。一种分布式变压器差动?；し酵?正常运行或外部故障时，变压器两侧都有电流通过，两个 </div> <p><p>差动?；さ幕驹恚罕溲蛊鞑疃；な前囱返缌髟砉钩傻?，它能正确区分变压器内、外故障，并能瞬时切除?；で诘墓收?。变压器两侧分别装设电流互感器TA1和TA2，其二次线圈按环流原则相串联，差动继电器接在差流回路上。</p><h1 class="title" style="box-sizing: border-box; font-size: 24px; margin: 0px; padding: 0px 0px 16px; width: 336px; line-height: 32px; font-weight: 400; color: rgb(51, 51, 51); font-family: "SF Pro Text", "Helvetica Neue", Helvetica, Tahoma, Arial, "Microsoft Yahei", 微软雅黑, "PingFang SC", 苹方, sans-serif; text-wrap: wrap; background-color: rgb(255, 255, 255);">一种分布式变压器差动?；し酵?/h1><p><img src="https://static.tianyancha.com/patent/abstractPic/CN/B/104/393/CN104393567B_1.png"/></p><p> 正常运行或外部故障时，变压器两侧都有电流通过，两个电流互感器的变比若选择适当时，二次电流I12和I22的大小相等，方向相同，而在差动回路中I12和I22的方向相反，因而差动继电器KD中的电流等于两侧电流互感器二次电流之差，电流为零，所以正常运行或外部故障时继电器不会动作。</p><p> 当变压器内部发生故障时，两侧电流互感器的二次电流Id12和Id22在差动回路中方向相同，差动继电器流过的电流为两电流之和，使差动继电器动作。</p><p> 实际上，由于变压器励磁涌流、接线方式和电流互感器的误差等因素的影响，差动继电器中会流过不平衡电流，不平衡电流越大，继电器的动作电流越大，致使差动?；さ牧槊粜越档汀Ｒ虼瞬疃；ば枰饩龅闹饕侍庵皇遣捎酶髦执胧┍苊獠黄胶獾缌鞯挠跋?，在保证选择性的条件下，还要保证内部故障时有足够的灵敏性和速动性。</p><p><br/></p></p> <div class="1zlx7hpjjv5" id="prevnext"> <span>上一篇：<a href="/cpzs/8765.html">变压器瓦斯?；さ墓ぷ髟硎鞘裁?/a> </span>????? <span>下一篇：<a href="/cpzs/8767.html">干式变压器与油浸式变压器的优缺点及其区别</a></span> </div> </div> </div>   <div id="1zlx7hpjjv5" class="sub_right"> <div id="1zlx7hpjjv5" class="listcon"> <h3>热点关注</h3> <ul> <li><a href='/cpzs/9553.html' title='MSCLA 低压无功自动补偿装置：低压配电的 “精准节能” 特种柜'>MSCLA 低压无功自动补偿装置：低压配电的 “精准节能” 特种柜</a></li> <li><a href='/cpzs/9552.html' title='PK 系列微机?；げ饪仄粒旱缌ο低车?“精准保护 + 智能测控” 特种柜'>PK 系列微机?；げ饪仄粒旱缌ο低车?“精准保护 + 智能测控” 特种柜</a></li> <li><a href='/cpzs/9551.html' title='GCS 低压抽出式开关柜：低压配电的 “高适配” 灵活方案'>GCS 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