Wednesday, May 10, 2023
Sunday, September 11, 2022
接在电流互感器二次侧的电度表读数是100度,电流互感器变比是100:5,实际用电量是()度。...
Monday, April 17, 2023
Monday, September 12, 2022
Thursday, December 1, 2022
漏电开关灵敏可靠,电气设备()用漏电开关代替过载、短路、护地、接零保护措施。...
Thursday, December 22, 2022
Sunday, March 17, 2024
热继电器在电动机控制电路中起的作用是()保护。A、短路B、过载C、短路及过载D、限流...
Monday, April 17, 2023
安装双重互锁的三相异步电动机正、反转电气控制线路的要求是什么?...
Sunday, November 26, 2023
高压隔离开关在运行中,若发现绝缘子表面严重放电或绝缘子破裂,应立即将高压隔离开关分断,退出运行。...
Wednesday, December 6, 2023
配电线路,可采用自动开关长延时脱扣器做线路的过载保护,期整定电流应不大于导线长期容许负荷电流的125%...
Saturday, October 28, 2023
Sunday, March 17, 2024
Sunday, September 11, 2022
消防联动设备的直流设备在接收到火灾报警信号后,应在多少时间内发出联动控制信号()。 A、1SB、3SC、1minD、10min...
Tuesday, February 6, 2024
Sunday, March 17, 2024
Thursday, July 13, 2023
自动空气开关保养时,用500V摇表测量绝缘电阻,应不低于(),否则应烘干处理。...
Thursday, February 8, 2024
Tuesday, January 9, 2024
运行电气设备操作必须由两人执行,由工级较低的人担任监护,工级较高者进行操作。...
Sunday, November 26, 2023
Wednesday, December 6, 2023