某单相用户功率为2.2kW,功率因数为0.9,则计算电流为10A...
Saturday, September 17, 2022
Friday, September 16, 2022
Friday, September 16, 2022
电压互感器的一次侧隔离断开后,其二次回路应有防止电压反馈的措施。...
Tuesday, February 6, 2024
电压抑制力矩与电压工作磁通的平方成反比,与转盘的转速成正比。...
Friday, September 16, 2022
某用户安装一只低压三相四线有功电能表,B相电流互感器二次极性反接...
Friday, September 16, 2022
电子式电能表的高温试验是在电能表非工作状态下加温到(),保持72...
Friday, September 16, 2022
接入中性点非有效接地的高压线路的计量装置,宜采用()。...
Friday, September 16, 2022
现场检验电流互感器时,要求调压器和升流器的容量应满足()。...
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
35kV以上贸易结算用电能计量装置中电压互感器二次回路,应不装设...
Friday, September 16, 2022
Tuesday, September 13, 2022
检查电压互感器接线是否正确时,当一次侧发生断线时,在二次侧测得的...
Friday, September 16, 2022
Friday, September 16, 2022
有一只内阻为200欧,量程为1毫安的毫安表,打算把它改制成量限为5安的电流表,应该并联()的分流电阻。A、0.25欧B、0.08欧C、0.04欧D、0.4欧...
Tuesday, April 30, 2024
若电阻的真值是1000,测量结果是1002,则正确的结论是()。...
Friday, September 16, 2022
Saturday, September 17, 2022
Friday, September 16, 2022
Tuesday, September 13, 2022