描述
电缆引入干扰
某200MW机组锅炉采用煤粉浓度作为热量调节反馈信号,DCS改造后发现煤粉浓度信号有高频干扰,造成给粉机自动调节不稳定,影响机组安全经济运行。经检查发现煤粉温度热电偶补偿导线没有使用屏蔽电缆,且与给粉机变频器电缆并行。后在小修中使用数采装置集中采集,用数字通讯方式通过屏蔽双绞线传输信号,改变走向,彻底消除了干扰。
很多机组控制系统是改造为DCS的,对DCS出现的异常情况应全面分析,不能忽视外围设备的影响。
主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro(福克斯波罗):I/A Series系统,FBM(现场输入/输出模块)
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
⑨Siemens(西门子):Siemens MOORE,Siemens Simatic C1,Siemens数控系统等。
⑩Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
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ALLEN BRADLEY 1745 LP101 PROCESSOR UNIT SLC 100
Allen Bradley Analog Input Exp.Unit 1745-E106/A NIB!
Allen Bradley Cat#1745-M1 Memory Module*NIB*
Allen Bradley 1745-LP101 SER D
Allen Bradley SLC100 Programmable Controller 1745-LP101
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ALLEN BRADLEY 1745-R2 NSFP 1745R2