实训八配电箱开关柜的安装.ppt

实训八 配电箱开关柜的安装•一、小型配电箱的安装 1、居民住宅用配电箱的组成居民住宅用配电箱的组成 一个配电箱应包括底板、单相电度表、插入式熔断器、单相空气开关、线槽等部分其主要结构有上、中、下3层 2、安装步骤及要求、安装步骤及要求 ①按配电箱结构和元器件数目确定各元器件的位置②用螺钉固定各电器元件，要求安装牢固，无松动③按线路图正确接线，要求配线长短适度，不能出现压皮、露铜等现象；线头要尽量避免交叉，必须交叉时应在交叉点架空跨越，两线间距不小于2mm④配线箱内的配线要通过线槽完成，导线要使用不同的颜色 3、室内配电箱、室内配电箱 ①组合配电箱的结构 导轨接地排接零排②组合电箱的使用 空气开关总电源空气开关厨房客厅卧室l卧室2卫生间组合电箱接线示意图4、实训内容练习、实训内容练习（1）单相配电板安装练习 在一块自制木台上按图安装一个单相小型配电板 二、成套电控柜的装配 1、控制柜电气原理图 （2）三相配电板的安装练习 在自制木台上按图装一个三相小型配电板 2、电器元件的选择 2单股铜线)，控制回路导线选用BV1 熔断器Fu1、Fu2、Fu3、Fu4、FU5、Fu6用于对电动机进行短路保护，熔体额定电流应不小于电动机额定电流的1.5~2.5倍，机电设备实习所用电机一般空载启动，系数可取1.5。

因此，熔断器可选用RL1-15／10A 自动空气开关的额定电压和额定电流应不小于电路工作额定电压和最大工作电流，热脱扣器的整定电流应与所控负载的额定电流一致，对于多台电机，DZ系列自动开关电流脱扣器的瞬时脱扣整定电流IZ也应按下式整定IZ≥K（Iqmax+电路中其他工作电流）其中，K可取1.5～1.7， Iqmax为最大一台电动机的启动电流此系统中空气开关应选取DZ10-100／330，过流脱扣器整定电流为20A 交流接触器的选择应根据主回路中负载的额定电流和额定电压，交流接触器主触点的额定电流应不小于负载回路额定电流，额定电压应不小于负载额定电压，本系统交流接触器型号为CJ10-10、220V，热继电器型号为JRl6B-20／3，热元件整定电流为3.2～5A，整定为电动机的额定电流4.4A开车按钮SB3、SB4和停车按钮SB1、SB2的型号均选用LA19-11，另外，开车按钮选用绿色，停车按钮选用红色，信号灯型号选用AD11-220V、红色 3、电器元件的排列 电器元件排列的原则是：排列均匀、整齐、美观，主回路接线最短 4、柜体设计 拟采用高×宽×厚=600×500×200mm3的柜体。

柜体可用2mm的铁板制作，底部要留有导线进口与出口，为节约材料，也可做成无底的；内板尺寸为520×480×6 mm3，采用绝缘树脂板制作 柜门(即控制面板)的开孔位置及加工尺寸图如图所示 5、元器件的安装 根据图纸安装电器元件和接线 6、整机调试 对照接线图检查接线是否完全正确，接地线安装是否牢靠，各按钮、接触器、热继电器等是否安装牢固然后，合上QF，用万用表欧姆挡测试L1、L2、L3之间的电阻和L1、L2、L3与N之间的电阻及各输出端子之间的电阻是否为无穷大，以此来判断是否有短路情况发生 用兆欧表测试各输出端子与控制柜外壳之间的绝缘电阻应大于5MΩ 7、通电试车 合上电源开关，按下SB3，指示灯HL1应亮，用万用表测试每相相电压及线电压是否为220V和380V，按下SB1后，指示灯HL1应熄灭，且各相相电压及线电压应为0V；按下SB4后，指示灯HL2应亮，同时测试各相相电压、线电压应为220V和380V，按下SB2后，指示灯HL2应熄灭，且各相相电压及线电压应为0V如存在故障应首先切断电源检修 实训内容和要求：1、实训内容：①参观配电装置 ②制作小型配电箱 2、实训要求：①了解配电箱配置。

②掌握配电箱配线工艺③掌握配电箱、开关柜的安装工艺及要求 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