Tuesday, September 13, 2022
Sunday, September 11, 2022
发生水锤时,闸门处的水锤压强幅值变化大持续时间强,所以这里所受的...
Sunday, September 11, 2022
Sunday, September 11, 2022
有一三相异步电动机Y接线,在额定负载下运行,等效电阻为8Ω,等效电抗为6Ω,试求该电机的电流和功率因数(Ue=380V)。...
Tuesday, May 21, 2024
Tuesday, May 21, 2024
Wednesday, November 23, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
水轮发电机组能够实现稳定运行,是因为它有()A、励磁机的调节B、调速器的调节C、电压校正器的调节D、自调节作用...
Thursday, January 12, 2023
如果发电机的电压表、电流表、功率表周期性的剧烈摆动,就可以肯定发...
Sunday, September 11, 2022
Sunday, September 11, 2022
万虎I线保护定检,写出用旁路保护代替该线路保护的主要操作步骤?...
Saturday, January 7, 2023
Sunday, September 11, 2022
LW6—220H SF6断路器液压机构启、停油泵及闭锁合、跳闸的油压各是多少?额定油压是多少?(20℃时)...
Sunday, February 19, 2023
自感电势eL的大小和线圈中的电流的变化率成正比,eL=—L。...
Sunday, September 11, 2022
波形在正常供电时应为()波,由于某些原因会造成波形(),所以要采...
Sunday, September 11, 2022
Sunday, September 11, 2022
同步发电机的三种不正常运行状态为过负荷、过电流、过电压。...
Sunday, September 11, 2022
当水轮发电机组转速达到140%额定转速时,应动作于()。...
Sunday, September 11, 2022