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2024年12月25日 星期三

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  • 1760-L18NWN-EX

  • 品牌:罗克韦尔
  • 规格:进口正品
  • 材质:美国
  • 货期:1-2天
  • 简称:AB
  • 更新时间:2019-10-18
  • 联系方式

    17326618839  /  0591-87272336

    陈经理 先生(销售经理

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详细信息
1760-L18NWN-EX
1760-L18NWN-EX
1760-L18NWN-EX
1760-L18NWN-EX

宝钢二期烧结工程主排风机设备1991年投入运行。主排风系统由2台21000m3 /min风量,1 7 . 6 4 k Pa (1800mmWG)静压差的双入离心式风机机组组成,主拖动电机为 2×7800kW,10kV无刷励磁同步电动机,2台电机共用一套3.4MVA变频软起动装置起动。该装置1991年投产以来,故障较多,启动成功率低。其主要原因是装置设计容量偏小,系统老化,参数漂移。随着宝钢生产节奏的进一步加快,对烧结矿生产的要求越来越高,为确保烧结生产的稳定运行,基于2DL主排风机起动装置及励磁装置的实际现状,对其进行整体改造的确势在必行。
  二、改造范围简述
  本改造项目不涉及主排风机本体及油泵、风门等辅机设备。对目前使用状况尚好的为辅机及辅助设备供电、控制服务的MCC柜以及关联二烧结主控制系统的远程I/O柜予以保留利用。
  对于10kV的高压开关,保留,能源部设置的辅助继电器、原有中继端子柜也予以保留。
  高压变频装置、励磁柜、操作控柜拟引进设备,对其进行整体更换。与变频装置配套的输入、输出变压器则由外商提供详细技术参数及制造要求,由宝钢方面择优从内制造厂订货,变压器采用油浸式变压器。
  考虑到本改造项目新上一套主排风机起动装置及励磁系统,而且在新系统安装调试好以前,老系统还要能运行使用,要求新系统电机空载或带风机负荷调试只能利用2DL年修的七天左右时间完成。当新系统调试过程中出现问题,不能如期接班时,还需老系统作为后备,维持2DL的正常生产。
  新起动系统10kV运行总线的两路旁路开关到二台同步电动机的馈电,接至老系统运行总线下的两路旁路开关,主排风机室电动机那段电缆仍用旧有电缆。新老系统试车或运行需重接高压柜的高压电缆进行相互切换。
  原有老系统的励磁柜、操作控盘拆除后,不再恢复。而新装的本次引进系统之励磁柜及操作、控制、视盘将要兼顾新老系统,这部分设备做成与新老系统兼容且具双向切换功能。
装置特点
  本高压变频器作为软起动器可以连续起动,起动时间小于200秒,起动电流不超过电机的额定电流。该产品特点为:
  可靠性高。该产品采用6500V,1500A 的高压SGCT器件,器件数量少,耐压及电流裕量大,变频电流小,器件开关损耗少,设备可靠。
  输入波形好。变频整流器采用多脉冲形式(18脉冲),总体谐波畸变THD小于 5%,直接满足IEEE519-1992及标的谐波标准。
  输出波形好。无需增加任何选项, PWM电流型变频器直接输出完正弦波形,不存在转矩脉动,无潜在共振问题。逆变时无dv/dt及di/dt的产生,谐波畸变THD小于5%,连接变频器及电机之间的距离可长达15km。
  起动性能好。PowerFlex7000采用直接矢量控制技术,本方案选用无编码器的矢量控制,转子的位置可直接检测,起动力矩为95%额定起动转矩。
  使用简单。人机接口为大屏幕液晶显示操作员终端。变频器的状态,输入输出变量,自诊断结果,故障报等信息均可显示在屏幕上。
  维护方便。高集成度的SGCT器件及 PowerCage机架的使用提高了系统模块化程度,从而保证了功率模块的更换时间小于5分钟。

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  • 联系人: 陈经理 先生
  • 位: 销售经理
  • 话: 0591-87272336
  • 机: 17326618839
  • 真: 0591-87272336
  • 资质公示 福州聚福兴自动化有限公司 地址: 福建省 福州市 福建省福州市仓山区盖山镇齐安路760号3层A3-026 邮编350007
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