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典型电气图的识图培训基础课件

  • 2026-06-13 22:10:09
典型电气图的识图培训基础课件
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2.图样的布局

概略图用功能布局法布置。对表示项目的图形符号的布局,应做到使信息、控制、能源和材料的流程清晰,易于区分辨认。必要时每个图形符号应标注参照代号。

表示电气元器件的图形符号按工作顺序或功能关系从左到右、自上而下布置,每个功能组的元件集中布置在一起,而不考虑其实际尺寸、形状和安装位置。

3.层次的表达方式

概略图可以在功能或结构的不同层次上绘制。较高层次的概略图描述总系统,反映表示对象的概况;较低层次的概略图描述系统中的分系统,将表示对象表达得更为详细。某一层次的概略图应包含检索描述较低层次文件的标记。

4.连接线及信号流向的表示方法

(1)连接线的表示方法

在概略图中,用于表示框形符号或带注释的框之间的电气的、机械的或非电过程(流程)的连接线用单线表示法表示。当概略图采用点画线框绘制时,其连接线接到该框内的图形符号上。

当概略图采用框形符号或带注释的实线框绘制时,其连接线接到框的轮廓线上。

(3)连接线上有关内容的标注

在连接线上可标注信号名称、频率、波形、去向和相关参数等标记。

5.相同项目的简化

当相同项目重复出现时,仅需详细地表示出其中的一个,其余项目可用点画线围框表示,并在围框内标注说明。

6.参照代号的标注方法

在概略图上,各个用于表示项目的图形符号、带注释的框或框形符号一般应标注参照代号。通常在较高层次的概略图上标注功能面的参照代号;在较低层次的概略图上,一般标注产品面的参照代号。

若不需要标注参照代号,也可不标注。由于概略图不具体表示项目的实际连接线和安装位置,因此一般不标注端子代号。参照代号一般标注在各框的上方或左上方。

四、供配电系统一次回路图

供配电系统一次回路图是指用图形符号绘制的表示一次设备的全部组成和连接关系的概略图,也称为主电路图、一次设备系统图,是一种应用比较广的概略图,主要用于概略地表示变配电所电能的输送和分配线路。

1.供配电系统一次回路图的绘制特点

(1)一次回路图的基本组成和主要特征一般用概略图来描述。除特殊情况外,几乎无一例外地画成单线图,即采用单线表示法表示。

(2)对有母线的一次回路,应以母线为核心,将各个项目联系在一起。母线的上方为电源进线,电源的进线如果以出线的形式送至母线,则可将此电源进线引至图的下方,然后用转折线接至开关柜,再接到母线上。母线的下方为出线,一般经过配电屏中的开关设备和电线电缆送至负载。

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  1. CONNECT:[ UseTime:0.000664s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000714s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000317s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000258s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000505s ]
  6. SELECT * FROM `set` [ RunTime:0.000251s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000517s ]
  8. SELECT * FROM `article` WHERE `id` = 506604 LIMIT 1 [ RunTime:0.000399s ]
  9. UPDATE `article` SET `lasttime` = 1782256596 WHERE `id` = 506604 [ RunTime:0.009637s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000301s ]
  11. SELECT * FROM `article` WHERE `id` < 506604 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000595s ]
  12. SELECT * FROM `article` WHERE `id` > 506604 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002845s ]
  13. SELECT * FROM `article` WHERE `id` < 506604 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001309s ]
  14. SELECT * FROM `article` WHERE `id` < 506604 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003441s ]
  15. SELECT * FROM `article` WHERE `id` < 506604 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003493s ]
0.096893s