品牌:GE/通用电气
起订:1件
供应:100件
发货:3天内
信息标签:IC693PWR321S,供应,电子、电工,工控系统及装备
IC693PWR321S我公司优势品牌众多,目前库存备货充足,随时发货,要订货的,货期短,直接国外订货,
具体型号来电咨询;充足的库存、健全的网络、完善的物流、优惠的价格,只要你想要的,
我们都能为你提供,随时满足您的需求。我们以**惠的价格回报您的光临!
IC693PWR321S———信用==财富—————偏门的备品备件联系我们
———诚信==财富—————冷门的备品备件联系我们
IC693PWR321S重合同、守信用,基础力量雄厚,备货充足!
公司有强大的营销网络,能为用户提供国外各种系列品牌的PLC.DCS备品备件,
还能为用户寻找偏冷门及停产的品种。
薄利多销,竭诚为广大用户提供全方位的服务。公司全体员工迎欢您的垂询!
我们**站在客户的角度上不断开拓、创新。真诚的期待与您的合作!
IC693PWR321S现场控制设备
在整个过程控制系统中**容易发生故障地点在现场,表2列出了现场中**容易出故障的几个方面。
1) **类故障点(也是故障**多的地点)在继电器、接触器。如该生产线PLC控制系统的日常维护中,电气备件消耗量**的为各类继电器或空气开关。主要原因除产品本身外,就是现场环境比较恶劣,接触器触点易打火或氧化,然后发热变形直至不能使用。在该生产线上所有现场的控制箱都是选用密闭性较好的盘柜,其内部元器件较其他采用敞开式盘柜内元器件的使用寿命明显要长。所以减少此类故障应尽量选用高性能继电器,改善元器件使用环境,减少更换的频率,以减少其对系统运行的影响。
2) 第二类故障多发点在阀门或闸板这一类的设备上,因为这类设备的关键执行部位,相对的位移一般较大,或者要经过电气转换等几个步骤才能完成阀门或闸板的位置转换,或者利用电动执行机构推拉阀门或闸板的位置转换,机械、电气、液压等各环节稍有不到位就会产生误差或故障。长期使用缺乏维护,机械、电气失灵是故障产生的主要原因,因此在系统运行时要加强对此类设备的巡检,发现问题及时处理。我厂对此类设备建立了严格的点检制度,经常检查阀门是否变形,执行机构是否灵活可用,控制器是否有效等,很好地保证了整个控制系统的有效性。
IC693PWR321S 3) 第三类故障点可能发生在开关、极限位置、安全保护和现场操作上的一些元件或设备上,其原因可能是因为长期磨损,也可能是长期不用而锈蚀老化。如该生产线窑尾料球储库上的布料行走车来回移动频繁,而且现场粉尘较大,所以接近开关触点出现变形、氧化、粉尘堵塞等从而导致触点接触不好或机构动作不灵
敏。对于这类设备故障的处理主要体现在定期维护,使设备时刻处于完好状态。对于限位开关尤其是重型设备上的限位开关除了定期检修外,还要在设计的过程中加入多重的保护措施。
4) 第四类故障点可能发生在PLC系统中的子设备,如接线盒、线端子、螺栓螺母等处。这类故障产生的原因除了设备本身的制作工艺原因外还和安装工艺有关,如有人认为电线和螺钉连接是压的越紧越好,但在二次维修时很容易导致拆卸困难,大力拆卸时容易造成连接件及其附近部件的损害。长期的打火、锈蚀等也是造成故障的原因。根据工程经验,这类故障一般是很难发现和维修的。所以在设备的安装和维修中一定要按照安装要求的安装工艺进行,不留设备隐患。
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