[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fdOX8t-wrwa5NITuX23NPmPER_2pZtfbN6UtYz1ykUFQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-04-20 19:22:08",139351873,[8,9,10,11],"&Delta;\u002FY","Y\u002F&Delta;","Y0\u002FY","Y\u002FY",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},89,"5d9c7599bddacdf02f1c59bd417e2381","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","电机技术--考试","work_34407416","变压器练习","三相变压器组不能采用下列哪种连接方法( )",[21,33,42,47,57,66,74,82,85,94],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-04-20 19:22:05",139351863,[26,27,28,29],"100\u002F4","4\u002F100","100\u002F(4&radic;3)","(100&radic;3)\u002F4","有一台三相电力变压器△\u002FY0接线,S N=500KVA,额定电压为10000\u002F400V,这台变压器的变比K约等于( )","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],139351864,[37,38,39,40],"高.中.低","低.中.高","高.低.中","低.高.中","一台三线圈升压变压器,三个线圈从外到里排列顺序是( )",{"answer":43,"createTime":23,"id":44,"options":45,"question":46,"source":31,"type":32},[],139351865,[37,38,39,40],"一台三线圈降压变压器,三个线圈从外到里排布顺序是( )",{"answer":48,"createTime":49,"id":50,"options":51,"question":56,"source":31,"type":32},[],"2024-04-20 19:22:07",139351866,[52,53,54,55],"9\u002F50","50\u002F9","(9&radic;3)\u002F50","50\u002F(9&radic;3)","一台三相变压器Y0\u002FY接线,做空载试验时,测得U1N=6300V,U20=35000V,那么该变压器变比为( )",{"answer":58,"createTime":49,"id":59,"options":60,"question":65,"source":31,"type":32},[],139351868,[61,62,63,64],"负载阻抗增大","电压上升","负载电流增大","功率因数增大","变压器负载增大是指二次側( )",{"answer":67,"createTime":5,"id":68,"options":69,"question":73,"source":31,"type":32},[],139351870,[70,71,72],"电源的接法决定","线圈的绕向决定","电源接法和线圈绕向共同决定","变压器的极性由( )",{"answer":75,"createTime":5,"id":76,"options":77,"question":81,"source":31,"type":32},[],139351872,[78,79,80],"该变压器额定容量为250","该变压器三个线圈就按上述比例传递功率","三个线圈容量的配合关系,只代表每个线圈传递功率的能力","若三线圈变压器的容量配合为:高压线圈100,中压线圈50,低压线圈100, 则下列说法哪一种对( )",{"answer":83,"createTime":5,"id":6,"options":84,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":86,"createTime":5,"id":87,"options":88,"question":93,"source":31,"type":32},[],139351874,[89,90,91,92],"是常数","不是常数","不一定是常数","在电压一定时可看作常数","变压器的励磁电抗x m对已制成的变压器( )",{"answer":95,"createTime":5,"id":96,"options":97,"question":98,"source":31,"type":32},[],139351875,[89,90,91,92],"变压器的励磁电阻r m对已制成的变压器是常数( )"]