[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$ftCYtSLR6d9TqkwOBjDOP36cvj3cvGYh7N6EqcSp2RXg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":17,"related":18,"source":29,"type":105},[],"2025-06-19 03:30:32",204174486,[8,9],"正确","错误",{"count":11,"courseId":12,"courseImg":13,"courseName":14,"workId":15,"workName":16},31,"678aab4d942991476d205c02559a8693","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F30e40e769e64c43bf50ad2f027a10f92.png","继电保护运行与调试","b5b079525ecf4ffeabc06fb1558e08d7","单元测试一","方向过电流保护中,同方向的保护,它的灵敏度应相互配合,即同方向保护的动作电流应从据电源远的保护开始,向着电源逐级增大",[19,31,40,49,57,66,75,83,89,97],{"answer":20,"createTime":21,"id":22,"options":23,"question":28,"source":29,"type":30},[],"2025-05-28 17:21:55",191652758,[24,25,26,27],"动作时间短的保护装,动作时间相同的保护不装","动作时间短的保护装,动作时间相同的保护也要装","动作时间长的保护装,动作时间相同的保护不装","动作时间长的保护装,动作时间相同的保护也要装","对于同一母线两侧的保护装置加装方向元件的规律是( )","v1",0,{"answer":32,"createTime":21,"id":33,"options":34,"question":39,"source":29,"type":30},[],191652761,[35,36,37,38],"电压形成回路","比较回路","相间短路保护整流型功率方向继电器的动作区和灵敏角","动作死区的消除","()的作用是将加到继电器中的电流Ir和电压Ur变换成与其成比例的KurIr和KvUr,以便进行绝对值比较",{"answer":41,"createTime":21,"id":42,"options":43,"question":48,"source":29,"type":30},[],191652765,[44,45,46,47],"0","100","220","380","在保护安装处正向出口发生三相金属性短路时,由于母线残余电压接近于零,故加到继电器上的电压Ur≈()V",{"answer":50,"createTime":21,"id":51,"options":52,"question":56,"source":29,"type":30},[],191652768,[53,54,55],"动作","拒动","视情况决定是否动作","双侧电源线路正方向短路时,继电器动作,反方向短路时应()",{"answer":58,"createTime":21,"id":59,"options":60,"question":65,"source":29,"type":30},[],191652771,[61,62,63,64],"45°接线","0°接线","90°接线","180°接线","为了消除正向出口两相短路的动作死区,采取( )接线",{"answer":67,"createTime":68,"id":69,"options":70,"question":74,"source":29,"type":30},[],"2025-05-28 17:21:56",191652774,[71,72,73],"可不装设方向元件","必须装设方向元件","动作时间短的需要装,动作时间相同的不需要装方向元件","一般来说,接入同一变电所母线上的双侧电源线路的过电流保护,动作时限短者和相等者则()",{"answer":76,"createTime":68,"id":77,"options":78,"question":82,"source":29,"type":30},[],191652777,[79,80,81],"母线;线路","线路;母线","电源;短路点","方向过电流保护工作原理中短路功率的方向从()指向()为正方向",{"answer":84,"createTime":68,"id":85,"options":86,"question":88,"source":29,"type":30},[],191652779,[71,72,87],"看经济情况","一般来说,接入同一变电所母线上的双侧电源线路的过电流保护,动作时限长者()",{"answer":90,"createTime":68,"id":91,"options":92,"question":96,"source":29,"type":30},[],191652781,[93,94,95],"信号元件","时间元件","方向元件","在过电流保护的基础上加装一个(),就构成了方向过电流保护",{"answer":98,"createTime":68,"id":99,"options":100,"question":104,"source":29,"type":30},[],191652783,[101,102,103],"需要加装KP","不需要加装KP","根据短路电流的大小可能加装也可能不加装KP","对于瞬时电流速断保护,如果反方向短路,则()",3]