IC698CPE030
IC698CPE030
IC698CPE030
IC698CPE030
变频恒压供水系统原构成如图1所示,它主要是由PLC、变频器、压力传感器、液位传感器、配电装置以及水泵等组成。用户通过控制柜面板上的指示灯和按钮、转换开关来了解和控制系统的运行。
该系统有手动和自动两种功能和停水模式
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福建光沃自动化设备有限公司
联系人 :欧工(销售经理)
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信用=财富 诚信=财富 共赢=财富
⑴. 手动运行
按下按钮启动或停止水泵,可根据需要分别控制1#-4#泵的启停。该方式主要供检修及变频器故障时用。
⑵. 自动运行
合上自动开关后,1#泵电机通电,变频器输出频率从0Hz上升,同时PID调节程序将接收到自压力传感器的标准信号,经运算与给定压力参数进行比较,将调节参数送给变频器,如压力不够,则频率上升到50Hz,1#泵由变频切换为工频,对2#泵进行变频,变频器逐渐上升频率至给定值,加泵依次类推;如用水量减小,从先启的泵开始减,同时根据PID调节器给的调节参数使系统平稳运行。若有电源瞬时停电的情况,则系统停机;待电源恢复正常后,系统自动恢复运行,然后按自动运行方式启动1#泵变频,直至在给定水压值上稳定运行。变频自动功能是该系统最基本的功能,系统自动完成对多台泵软起动、停止、循环变频的全部操作过程。
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(3)停水模式 为解决短暂停水时的供水问题,利用现有水池,进行分时段的供水,并采取低压小流量供水的方式保证我校师生的基本用水。
(4)其他,利用液位传感器时时测定水池内的蓄水量,控制进水阀的启闭,以保持水量恒定。在系统检修,水池清洗时可自由切换到手动控制方式。
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