常用速查电工手册VIP免费

常用速查电工手册目录一、功率电流快速计算公式，导线截面积与电流的关系..............................................................................................51、功率电流速算公式...............................52、下面是铜线在不同温度下的线径和所能承受的最大电流................................................73、导线线径一般按如下公式计算............74、说明.....................................................85、估算口诀..............................................8二、电线大小与用电功率之间的计算...................101、用途...................................................102、口诀...................................................103、说明...................................................10三、电压降的估算...............................................................121、用途...................................................122、口诀...................................................123、说明...................................................124、以上就是电压损失的估算方法。.......15四、根据电流来选截面....................................................161、用途...................................................162、口诀...................................................173、说明...................................................174、下面这个估算口诀和上面的有异曲同工之处：.............................................................205、口决...................................................206、说明...................................................207、电线粗细与电器功率之间的关系是怎样计算的？.........................................................228、如合计算电线所能承受的电功率.......22五、电线线径对应电流速查表:......................................24六、实操项目2101：正反转能耗制动控制...........251、实操目的............................................252、动作原理............................................253、接线图................................................264、线路检查（取下FU2）.........................265、通电试车............................................276、故障分析............................................277、注意事项............................................288、分析思考............................................28七、实操项目2102:双速电机控制..............................281、实操目的............................................292、动作原理............................................293、接线圈................................................294、线路检查（取下FU1）.........................305、通电试车............................................306、故障分析............................................307、注意事项............................................318、分析思考............................................31八、实操项目2103：Y/Δ启动及顺序控制.............321、实操目的............................................322、动作原理............................................323、接线图................................................334、线路检查（取FU2）.............................335、通电试车............................................336、故障分析............................................337、注意事项............................................338、分析思考............................................34九、实操项目2104：三速电机控制...........................351、实操目的............................................352...