1756-A10K、1756-A10K
更新时间:2015-10-23 10:53:37 信息编号:3964290 发布者IP:117.25.231.87 浏览:64次![](http://img4.11467.com/u/22258960/179424689.jpg)
- 供应商
- 厦门卡库电气有限公司 商铺
- 认证
- 资质核验:已通过营业执照认证入驻顺企:第9年主体名称:厦门卡库电气有限公司组织机构代码:913502063031332818
- 报价
- 人民币¥99.00元每个
- 品牌
- AB
- 型号
- 1756-A10K
- 关键词
- AB,现货,图片,价格
- 所在地
- 厦门市湖里区安岭路966-968号汇金湖里大厦815号之一
- 联系电话
- 0592-5709823
- 手机号
- 18030229052
- 销售
- 严小姐 请说明来自顺企网,优惠更多
产品详细介绍
1756-A10K产品说明:
厦门卡库电气有限公司是自动化产品及自动化设备销售的企业,对各大自动化产品品牌有着强大的优势,并且对优势产品有着大量的备货。与欧洲及世界从事电气的各公司有着良好的协作关系。欢迎来电咨询! DCS 数控系统 传感器 高压柜 变电站 变压器 敏感元器件 PLC 伺服定位系统一站式服务 主营产品:Fanuc,Foxboro,Ovatin,Allen-Bradley,Siemens等各类工控产品,欢迎来电咨询!
1756-A10K
【公 司】: 厦门卡库电气有限公司
【主 营】: AB、GE、施耐德等各类PLC产品
【价 格】: 电议
【发布人】: 严小姐
【电 话】:
【所在地】: 福建 - 厦门
【坐 机】: 0592-5709823
【Q Q】: 1093230189
●我们的使命是帮助您!
●降低您的维护成本!
●延长控制系统寿命!
●以帮助支持现有的控制系统!
●提供嵌入式系统备件!
●各种大型进口DCS系统备品,备件。
●专注于停产的控制系统零部件领先地位!
●我们有我们自己的内部库存和大量的供应商为分销商为您带来的解决方案满足您的需求!
●有一个坚定的承诺为您提供高质量,高价值,和卓越的服务和世界各地的客户!
公司主营:
Allen-Bradley(美国AB)系列产品》
Schneider(施耐德电气)系列产品》
General electric(通用电气)系列产品》
Westinghouse(美国西屋)系列产品》
SIEMENS(西门子系列产品)》
在用水量较大时,变频器输出频率接近工频,而管网压力仍达不到压力设定值,PLC将当前工作的变频切换到工频下工作,并关断变频器,再将变频器切换到另一台泵,由变频器软启动该泵,实现一台工频一台变频双泵供水。随着用水量减少,变频器输出频率下降,当降到频率下限,而压力仍能达压力设定值时,PLC将工频工作泵切除,只由剩下的单泵变频供水。系统无论单泵变频工作,还是双泵一台工频一台变耨工作,始终控制管网压力与给定压力值保持一致,实现恒压供水。
水泵切换程序如图3所示,是根据设定的压力与压力传感器测定的现场压力信号之差△P来控制的。当△P>0时,增加输出电流的大小,提高变频器的输出频率,从而使变频泵转速加快,实际水压得以提高;当△P<0时,则变频泵转速降低,实际水压减少,△P减少。经过多次调整,直至△P=0。由此,实际压力在设定压力附近波动,保证压力恒定。如果实际压力太小,某台调速泵调整到Zui大供水量仍不足以使△P=0,则该台变频泵切换至工频,而增加下一台泵为变频工作;,如果实际压力过大,本台调速泵调整到Zui小供水量仍不足使△P=0,则关闭上次转换成工频的水泵,再进行调整。这样每台泵在工频和变频之间切换,做到先开先停,后开后停,即所谓的循环调频。各泵均衡运行,合理利用资源,延长泵的使用寿命,减少维护量和维护费用。
4、 系统设计 4.1 变频器硬件设计
变频器选用日本三菱变频器FR-E540-4K产品,适配电机4kW。该变频器基本配置中带有PID功能,通过变频器面板设定一个给定频率作为压力给定值,压力传感器反馈来的压力信号(0-10V)接至变频器的辅助输入端作为压力反馈,变频器根据压力给定和实测压力,调节输出频率,改变水泵转速,控制管网压力保持在给定压力值上。
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相关产品:AB , 现货 , 图片 , 价格
主要经营:A-B,GE FANUC,施耐德,西门子,西屋
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