日本1746-P5

电气原理图主要分主电路和控制电路两部分。电动机的通路为主电路，接触器吸引线圈的通路为控制电路。此外还有信号电路、 照明电路等。原理图中，各电器元件不画实际的外形图，而采用规定的统一，文字符号也要符合规定。在电气原理图中，同一电器的不同部件常常不画在一起，而是画在电路的不同地方，同一电器的不同部件都用相同的文字符号标明，例如接触器的主触头通常画在主电路中，而吸引线圈和辅助触头则画在控制电路中，但它们都用KM表示。同一种电器一般用相同的字母表示，但在字母的后边加上数码或其他字母下标以示区别，例如两个接触器分别用KM1、KM2表示，或用KMF、KMR表示。全部触头都按常态给出。对接触器和各种继电器，常态是指未通电时的状态； 对按钮、 行程开关等，则是指未受外力作用时的状态。原理图中，无论是主电路还是辅助电路，各电气元件一般按动作顺序从上到下，从左到右依次排列，可水平布置或者垂直布置。原理图中，有直接电联系的交叉导线连接点，要用黑圆点表示。无直接联系的交叉导线连接点不画黑圆点。
   电气控制系统是由许多电气元件按照一定要求联接而成的。为了表达生产机械电气控制系统的结构、原理等设计意图，同时也为了便于电气系统的安装、调整、使用和维修，需要将电气控制系统中各电气元件及其联接用一定图形表达出来，这种图就是电气控制系统图。
为了提高电气系统图的通用性，局参照电工**（IEC）颁布的有关文件，制定了我国电气设备的有关。电气图形符号通常用于电气系统图，用以表示一个设备或器件的图形，文字符号适用于电气技术文件（包括电气系统图）用以标明电气设备、器件的名称、功能、状态及特征。
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TCI KDRULL6H Line Reactor, 3PH, 590A, 600V Max, 50/60Hz
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