1、用中间继电器作为缺相保护装置的线路
2、脚踏开关踩气缸动作实物彩图接线
3、浮球开关的工作原理讲解
4、常用元件代号及图形符号的画法
5、电工必学的7个基础程序-自锁-多点启停-点动加联动运行
6、电工必学的7个基础程序-延时接通、延时断开-交替输出
7、电工必学的7个基础程序-连锁和互锁-闪烁电路
8、220V电机的倒顺开关实物彩图接线方法
9、变频器电路的接线方法
10、时间继电器的接线方法-实物彩图
11、以太网跟PLC通信电路实物图
12、正反转电路实物彩图接线方法
13、互感器与电表的实物彩图接线方法
14、自制温控风扇电路实物彩图方法
15、星三角380V主电路实物彩图接线方法
16、电接点压力表实物彩图接线电路图
17、接触器实现单开双控的实物彩图接线方法
18、空气能热水循环系统电路
19、变频器接线实物彩图电路展示
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陆兰泪2915通电延时和断电延时有啥区别, -
鲜颜览18318878807 ______ 一、工作原理区别 通电延时型时间继电器在获得输入信号后立即开始延时,需待延时完毕,其执行部分才输出信号以操纵控制电路;当输入信号消失后,继电器立即恢复到动作前的状态. 断电延时型时间继电器恰恰相反,当获得输入信号后,...
陆兰泪2915西门子PLC程序中顺时闭合延时断开触点长什么样啊 -
鲜颜览18318878807 ______ 断开延时定时器(TOF)用于在输入关闭后,延迟固定的一段时间再关闭输出.启用输入打开时,定时器位立即打开,当前值被设为0.输入关闭时,定时器继续计时,直到消逝...
陆兰泪2915常见的电子器件符号? -
鲜颜览18318878807 ______ 电气设备常用文字符号新旧对照表 名 称 文字符号 新 旧 (一)常用基本文字符号 电桥 AB DQ 晶体管放大器 AD DF 集成电路放大器 AJ 印刷电路板 AP 抽屉柜 AT 旋转变压器(测速发电机) TG CF 电容器 C C 发热器件 EH RJ 照明灯 EL ZD 空...
陆兰泪2915接触器与继电器作用有何异同? -
鲜颜览18318878807 ______ 电器 定义 继电器:是一种根据电量(电流,电压)或非电量(时间,速度,温度,压力等)的变化自动接通和断开控制电路,以完成控制或保护任务的电器. 与接触器的区别 继电器可以对各种电量或非电量的变化作出反应,而接触器只有在一定...
陆兰泪2915怎样区分时间继电器通电延时还是断电延时. -
鲜颜览18318878807 ______ 通电延时的时间继电器:通电开始计时,达到设定时间时触点状态切换,断电后触点状态立即恢复.——通电延时,断电不延时. 断电延时的时间继电器:通电后触点状态立即切换,直到断电后开始计时,达到设定时间时触点状态才恢复.——通电不延时,断电延时. (有的时间继电器始终要求供电,它的计时条件是外界另外给它一个开关信号或电压信号,因此把时间继电器称作“接通延时”和“断开延时”似乎更确切.) 只要按上述的原理对时间继电器进行测试,不难判断时间继电器是接通延时型的还是断开延时型的.
陆兰泪2915延时继电器 二组延时触点是分别计时的吗? -
鲜颜览18318878807 ______ 延时继电器 二组延时触点不是分别计时的,只有一个延时时间. 注:从业五十年,未见有分别计时的延时继电器, 但不排除可以做出分别计时的的产品
陆兰泪2915关于 继电器 中间继电器 时间继电器 热继电器 -
鲜颜览18318878807 ______ 继电器类较多,分别以功能区分,除热继电器的工作原理不同外,其余继电器均为线圈通电后,吸引衔铁经触点转换,接通或切断电路,达到控制目的.继电器--J,触点容量较小,约1A以内;中间继电器--ZJ,触点容量在5A左右;时间继电器--SJ,通电后可分为延时接通的常开触点和延时断开的常闭触点;热继电器--RJ,利用双金属片膨胀系数不同,受热后产生变形,控制触点的通断.
陆兰泪2915延时继电器 -
鲜颜览18318878807 ______ 时间继电器是一种电磁原理或机械原理实现延时控制的控制电器.它的种类,有电磁式延时继电器;电动式时间继电器;热延时继电器;混合式延时继电器;固体时间继电器. 时间继电器可分为通电延时型和断电延时型两种类型. ...
陆兰泪2915熔断器俗称什么? -
鲜颜览18318878807 ______ 电子设备中使用的保护元件除熔断电阻器外,还有普通熔断器、热熔断器和自恢复熔断器等.保护元件一般是串接在电路中,它在电路中出现过电流、过电压或过热等异常现象时,会立即熔断而起到保护作用,可防止故障进一步扩大. (一)普...
