FCP270

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描述

FCP270

 寻找接地点的方法有如下几点：
    1、仔细检查引出线和槽子两端，发现引出线完好，槽子两端槽口绝缘均无损坏，电机内外很干净，各处无灰尘及油污，这说明接地点在槽内。
    2、解开定子绕组的Y型连接点，分别测量各相对地绝缘电阻，查出有接地故障的相。
    3、用一台单相调压器，其输出端的相线接到有接地故障相的一端引出线上，零线接电机机壳，然后将调压器从零开始升压，至槽内冒烟，这是立即将调压器输出电压将为零并切断电源，冒烟处就是接地点。整个操作过程都要注意安全，要将电机放在一块绝缘垫上，切断电源前人身不能接触电机。
    处理方法是：把有接地槽的槽楔小心去除，然后将电机放入烘箱内加热，烘软绕组，然后仔细将槽内线匝取出，检查各导线绝缘。绝缘被破坏的要涂漆、烘干，然后重新在槽内放置槽绝缘纸，再将所取出的线匝放入槽内，打入槽楔，绕组浸漆、烘干。
    如发现漆包线已被烧断，要将两根断线头分别拉到绕组的端部，然后找一根线径相同的漆包线放入槽内，在绕组两端部接线。接头要绞合锡焊、涂漆、烘干，再套上绝缘套管。捆扎端部时，要注意捆扎接头。
    三、定子绕组匝间短路故障的判断
    定子绕组匝间短路故障，一般是通过测量三相绕组的直流电阻来判断的。但容量较大的电机定子绕组直流电阻很小，加上仪表精度及测量误差等关系的影响，不易得出正确的判断，但可以采用如下办法来判断。
    不分解电机，用一台容量适当的单相自耦调压器，从零开始逐步升压，向其中一相通入低压交流电。同时，用一只钳形电流表测量电流，使电流上升到电机额定电流的1/3左右。然后停止升压，用万用表分别测量其它两相感应电压，如果某一相有匝间短路故障，它的感应电压就比另一相低。然后调换一相通电，用同样的方法测量其它两相的感应电压。根据感应电压是否相同，可判断出是否有匝间短路故障。定子匝间短路故障，在维修中一般需要更换电机绕组。

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选择深圳长欣，选择放心，售后无忧大量现货，当天顺丰发货！
主营：本特利，英维思，伍德沃德，福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐，ACSO，力士乐等各大品牌的DCS系统配件，机器人系统配件，大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”（不管能不能看懂，先了解个大概，以便学习编程时查找）；
2、由位控逻辑入手，逐渐增加定时、计数等条件，把或、与、非关系理顺；
3、进而练习整数运算、实数运算、类型转换；
4、量程转换、PID调节回路的建立及P、I、D参数的理解（最好是有个物理回路验证，比如变频器+电机+测速传感器）；
5、循环、顺序、跳转等程序控制（尽量避免跳转，非跳不可时也是跳的越近越好）；
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列，GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌，由于PLC的基本框架大同小异，学会一种至于其它的学习起来也就简单了。

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