2025-Rfq-07 Lift Station Controls . The Existing Lift Station Comprises Of An Underground Holding Tank And Three Above Ground Pumps That Pump Waste Water To The Treatment Plant. Two Pumps Are Required To Run Together In Series For Pumping To The Treatment Plant. Level Is Measured In The Tank With A Milltronic Level System With Ultrasonic Sensor. This Level Is Sent To The Plc Via 4-20 Ma Signal. The Pumps Are Turned On/Off By Level Set Points In The Milltronics. Hi And Low Level Alarms Are Also Setup In The Milltronics. Data Is Send From The Plc To The Treatment Plant Where It Is Displayed On The Vt Scada System. Alarms Are Sent Out By The Vt Scada System. The Existing Controls System Has Two Plc’S. A Slc 5/03 And A Directlogic 06. The Slc Is The Main Plc And The Direct Logic Is Mainly For Sending Level Vfd Speed And Some Alarms To The Vt Scada. The Purpose Of This Upgrade Is To Upgrade The Obsolete Plc’S To One New Plc.
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