问题:BQD-80/1140(660)N按下起动按钮,接触器不吸合的原因是什么?...
Monday, August 21, 2023
Sunday, September 11, 2022
问题:对于地面380/220伏动力与照明电网,供电的变压器,其中性点禁...
Saturday, September 17, 2022
问题:QCZ83—120(225)型真空磁力启动器具有()、()和保护...
Saturday, September 17, 2022
Saturday, February 24, 2024
Monday, November 27, 2023
Thursday, December 28, 2023
Saturday, September 17, 2022
问题:电流保护装置的常用接线方式有哪几种?各适用什么情况?...
Thursday, February 15, 2024
Monday, August 21, 2023
问题:QJZ-400/1140(660)智能型矿用隔爆兼本质安全型电磁启动器用在什么地方?具有哪些保护?用来控制哪些电气设备?...
Wednesday, August 23, 2023
问题:矿灯电压为()。A、交流36伏B、直流4伏C、直流6伏...
Wednesday, August 23, 2023
Saturday, September 17, 2022
Sunday, June 4, 2023
Tuesday, February 28, 2023
问题:设在水沟中的接地极为()接地极A、局部B、主C、辅助...
Sunday, December 3, 2023
问题:矿用一般型电气设备与普通电气设备相比有哪些特点?...
Monday, November 27, 2023
Sunday, December 3, 2023
问题:矿用防爆电气设备的防爆性能,分为哪几种?其标记的含义是什么?...
Tuesday, September 13, 2022
Tuesday, September 13, 2022