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J50JB/T2740－1996工业机械电气设备电气图、图解和表的绘制1996-04-22发布1996-07-01实施中华人民共和国机械工业部发布()I1主题内容与适用范围···············································································································································································12引用标准·········································································································································································································13术语····················································································································································································································14一般规则·········································································································································································································45项目代号四段标志法·············································································································································································136电路图·············································································································································································································207系统图或框图·····························································································································································································248接线图和接线表························································································································································································259电气元件安装图························································································································································································2710工业机械电气设备安装图（安装图）······································································································································2711电气设备元件明细表···········································································································································································2812附加说明·····································································································································································································2813对各种文件的特定要求·····································································································································································28附录A电气图、图解和表的范例及其说明（补充件）·····································································································29附录B高层代号和位置代号及其应用（参考件）················································································································31附录C梯形图的绘制（参考件）·····················································································································································32JB/T2740－1996目次()1本标准是参照采用了下列国际电工技术委员会（IEC）标准制订的。IEC1082–1∶1991电气技术文件的编制—第1部分：通用要求IEC1082–2：电气技术文件的编制—第2部分：按功能布置的简图（制订中）IEC1082–3：电气技术文件的编制—第3部分：连接图、表和目录（制订中）IEC750∶1983电气技术中的项目代号1主题内容与适用范围本标准规定了工业机械电气设备电气图、图解和表的绘制方法。本标准适用于金属切削机床、木工机床、电加工机床、铸造和锻压机械等工业机械电气设备的电气图、图解和表的绘制。2引用标准GB4457.1机械制图图纸幅面及格式GB4457.3机械制图字体GB4728电气图用图形符号GB4884绝缘导线的标记GB/T5226.1工业机械电气设备第1部分：通用技术条件GB6988.2电气制图一般规则GB7159电气技术中的文字符号制订通则GB10609.1技术制图标题栏JB/T2739工业机械电气图用图形符号3术语3.1图及表的定义3.1.1图是用图示法的各种表达形式的总称，也可定义为用图的形式来表示信息的一种技术文件。3.1.2简图用图形符号，带注释的围框或简化的外形表示系统或设备中各组成部分之间相互关系及其连接关系的一种图。在不引起混淆时，简图也可简称为图。3.1.3表格把数据等内容按纵横排列的一种表达形式，用以说明系统、成套装置或设备中各组成部分的相互关系或连接关系，或者用以提供工作参数。表格也可简称为表。表格可以作为图的补充，也可用来代替某些图。机械工业部1996-04-22批准中华人民共和国机械行业标准工业机械电气设备电气图、图解和表的绘制JB/T2740－1996代替JB2740—851996-07-01实施JB/T2740－199623.1.4系统图或框图用符号或带注释的框，概略表示系统或分系统的基本组成、相互关系及其主要特征的一种简图。3.1.5逻辑图主要用二进制逻辑单元图形符号绘制的一种简图。而只表示功能不涉及其实现方法的逻辑图，称为纯逻辑图。3.1.6电路图用图形符号并按工作顺序排列，详细表示电路、设备或成套装置的全部基本组成和连接关系，而不考虑其实际位置的一种简图，目的是便于详细了解作用原理，分析和计算电路特性之用。3.1.7设备元件表（设备元件清单）把成套装置、设备和装置中各组成部分和相应数据列成的表格，其用途是表示各组成部分的名称、型号、规格和数量等。3.1.8互连接线图或互连接线表表示成套装置或设备的不同结构单元之间连接关系，并标注出外部接线所需数据的一种接线图或接线表。3.1.9单元接线图或单元接线表表示成套装置或设备中一个结构单元内的连接关系的一种接线图或接线表。3.1.10端子接线图或端子接线表表示成套装置或设备的端子以及接在端子上的外部接线（必要时包括内部接线）的一种接线图或接线表。3.1.11电缆图提供关于电缆的信息，如导体的识别、终端连接的位置，必要时提供特性、路线和功能的一种图（表）。3.1.12位置简图或位置图表示成套装置、设备或装置中各个项目相对位置的一种简图或一种图。3.1.13机床电气设备安装图（安装图）表示出机床电气设备各个单元的布局和安装工作所需数据的图。3.1.14梯形图为实现机床的控制要求，以规定的图形符号，描述顺序执行的逻辑操作或功能操作的图形集合。3.1.15流程图以文字或语句表达数控系统、可编程序控制器或伺服系统的运行因果关系或操作步骤的序列图。3.1.16语句表数控系统或可编程序控制器进行特定的逻辑操作或功能操作的指令符号。3.1.17图解用来表示：a．不同操作之间相互关系的示意图；b．各个操作与时间之间相互关系的示意图；c．各个操作与物理量之间相互关系的示意图；d．各个项目状态之间相互关系的示意图。3.2表示法3.2.1多线表示法JB/T2740－19963每个连接线或导线在简图上各分别用一条图线表示的方法。3.2.2单线表示法两根或两根以上的连接线或导线在简图上只用一条图线表示的方法。3.2.3连接表示法（集中表示法）把设备或成套装置中的一个项目组成部分的图形符号在简图上绘制在一起的方法。3.2.4半连接表示法（半集中表示法）为了使设备和装置的电路布局清晰，易于识别，把一个项目中的某些组成部分的图形符号在简图上分开布置，并用机械连接线符号表示它们之间关系的方法。3.2.5分开表示法为了使设备和装置的电路布局清晰，易于识别，把一个项目的各组成部分的图形符号在简图上分开布置，并仅用项目代号来表示它们之间关系的方法。3.3项目代号术语3.3.1基础件不可再拆的，拆开便丧失功能的元件。如集成电路、电阻、电磁线圈等。3.3