装表接电教材（3）.doc

表3-2 三相二元件有功电能表误接线所计功率查对表电压相序计量 功率电流相序 1 A C0002 C A 02UIsin003 C A24 A C25 C A-1856 A C-27 A C0008 C A000186注 表中小圆圈“。”是电压、电流接线端钮，排列顺序与实际电能表一样。表3-4 三相三线有功电能表误接线时的更正率及各种功率因数下的值接线序号计算功率更正率1.00.980.960.940.920.900.880.860.84O.820.800.750.70O650.6034UI(-)-100.1330.2030.2650.3260.388O.4520.5210.5950.6750.7641.0371.4332.0773.34465UI(+)-10-0.105-0.144-0.173-0.197-0.219-0.219-O.255-0.272-0.287-O.302-0.337-O.371-O.403-O.435342UI-13.2651.9691.3861.0330.7880.604O.4590.3410.241O.155O.018-O.151-0.259-O.35l34UI(-)-111.2661.4051.531.6521.7761.9052.0422.192.352.5273.0753.8375.1547.68971988UI(+)-110.4790.3290.2280.1510.0880.034-0.014-0.056-O.095-0.130-O.209-O.277-O.338-0.39678UI(-)-112.0853.0424.3856.62911.4lZ9.69171.1815.848.5725.6892.7921.608O.951O.52756UI(+)-110.790.7120.6530.605O.5630.525O.4900.457O.4260.396O.3250.2590.1990.1334-17.5294.9383.7723.0662.5772.2091.9191.68l1.4811.3090.964O698O4810.299续表接线序号计算功率更正率1.00.980.960.940.920.90O.88O860.840.820.80O.75O.700.65O.6056-1-5.265-3.969-3.386-3.033-2.788-2.604-2.459-2.341-2.24l-2.155-1.982-1.849-1.741-1.65034UI(-)-1-2-1.895-1.856-1.827-1.803-1.781-1.762-1.745-1.728-1.713-1.698-1.663-1.629199-1.597-1.5655UI(-+)-1-2-2.133-2.203-2.265-2.326-2.388-2.453-2.521-2.595-2.675-2.764-3.037-3.438-4.077-5.34465-UI-1-9.529-6.938-5.772-5.066-4.577-4.209-3.919-3.681-3.481-3.309-2.964-2.698-2.481-2.29934UI(-)-1-3-2.79-2.712-2.653-2.605-2.563-2.525-2.49-2.457-2.426-2.396-2.325-2.295-2.199-2.1356UI(+)-1-3-3.266-3.405-3.530-3.652-3.776-3.905-4.042-4.19-4.35-4.527-5.075-5.867-7.154-9.6891200UI(-+)-1-3-4.085-5.042-6.385-8.629-13.41-31.691-17.84-17.84-10.572-7.689-4.792-3.608-2.951-2.52721UI(-)-1-3-2.479-2.329-2.228-2.151-2.088-2.034-1.986-1.944-1.905-1.87-1.792-1.723-1.661-1.60478-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2201例如：电能表第元件通入ICAB，第元件通入-IACB时，从表3-2中电流相序栏的第3行中可看出，元件通入正相电流IC，元件通入反相IA(即-IA)电流；同时可在电压相序栏第列中可看出，元件加入AB电压，元件加入CB电压。所以，第3行和第列交叉对应栏中所注明的2Isin，即为此种接线的计量功率表达式。根据接线序号3再到表4.4中，即可查出更正率为：P =-1，并且可查出各种功率因数下的值。【例3-5】 某用户误将电能表接成-IA、UAB、IC、UCB(即元件电流极性接反)，实际电能为53000千瓦时，平均功率因数为0.84，