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幸雍科613电工QF和YW是什么符号,也不是断路器啊 -
尤刘娥13657912149 ______ 电气工程图项目种类字母代码: Q-----通指电力电路的开关器件 QF-----断路器 类似常用的还有:QL---负荷开关,QS-----隔离开关,QC-----接触器,QV-----真空断路器 YW-----字母代码中未见这种组合 类似的倒有:YV-----电磁阀,YM-----电动阀 Y-----通指电气操作的机械器件 以上回复仅针对常见的建筑工程制图,电子电器图中字母含义或有差别 参考资料:【标准工程图集】00DX001 建筑电气工程设计常用图形和文字符号
幸雍科613电气开关qf250a/3p -
尤刘娥13657912149 ______ QF250A/3P含义是: QF是指空气开关; 250A是指最大电流; 3P是指三线断路(即有3对触点)
幸雍科613请问电器中QF是什么的缩写 -
尤刘娥13657912149 ______ IEC 61636-1中规定,不是英文缩写,是字母含义组合 Q:Switching device for power circuit 电力回路开关设备 F: Protection device 保护设备 QF:断路器 断路器 英文全称是: circuit breaker
幸雍科613断路器的符号是什么
尤刘娥13657912149 ______ FU是指熔断器,Q是电力电路中的开关总称,QF是指断路器,QM是指电动机保护开关,QS是指隔离开关.见教育部【电工应用识图】第6页.
幸雍科613电路图中开关的作用是什么? -
尤刘娥13657912149 ______ 一般开关都是控制电路中的电流通断. “QF”是指电源开关,一般控制主电路的电流通断 “KM”是接触器的长开或长闭触点,一般控制支路的电流通断. “SB”是按钮,一般是控制装置上的,比如按钮盒.它可用来控制电路的运行状态;比如正反转控制电路中的按钮,按“SB1”启动电路,电动机正转,按“SB2”电动机就会反转,按“SB3”电动机就停止转动. 我知道的大概就这么多了,不知有没有用.
幸雍科613单相电机如何降压启动,或者延长启动时间? -
尤刘娥13657912149 ______ 电动机自耦降压启动(自动控制电路). 上图是交流电动机自耦降压启动自动切换控制电路,自动切换靠时间继电器完成,用时间继电器切换能可靠地完成由启动到运行的转换过程,不会造成启动时间的长短不一的情况,也不会因启动时间长...
幸雍科613同是开关,为什么低压断路器 QF 与负荷开关 QS 的符号不同?画法也不同,都表示什么意思?急啊、书上都没有! -
尤刘娥13657912149 ______[答案] QF是空气断路器,一般可用在配电和控制回路中,具有过载和短路保护功能;QS是隔离开关,一般用在配电回路中,具有隔离作用(作为明显断开点).
幸雍科613QF是个断路器…为何一送电就跳 -
尤刘娥13657912149 ______ 如果单纯是断路器的话,按这个图纸接线不会跳!你的断路器应该是带漏保的!把所有灯的零线都接到断路器后面去就不会跳了.
幸雍科613电气主接线图符号和什么形式的主接线 -
尤刘娥13657912149 ______ 双母线带旁路母线.QF1是L1出线开关,QF是母联开关,QFp是旁路开关.
幸雍科613电源隔离开关是什么?有没有人知道? -
尤刘娥13657912149 ______ 隔离开关,言下之意不就是用来隔离电源的开关 除了上面所说的隔离开关,就是用来隔离电源,便于检查维修的安全之用的! 还有最重要的一点是需要牢记! 这一点就是隔离开关,是绝对不能带负荷,分合隔离开关的 隔离开关牌子推荐 民熔电气