Download - Level Control Drain Icos
Electrical scheme with 2 level sensors linking in a contactor controlling a pump for an automatic level control.
L1 L2 L3
T1 T2 T3
13
14
A1
A2
L1 L2
Upper level sensor
Lower level sensor
Pump
Working 1 - Empty tank: The switches are opened and do not permit the coil energization (A1/A2) from contactor keeping the pump off.
2 - The tanks level rises: The lower sensor close the contacts but the coil keeps not energyzed until the upper sensor be reached, then the contactor remain energyzed by the contacts 13/14, starting the pump.
3 - Lowering the tank: When the upper sensor opens the coil keep energyzed by the contacts 13/14 and the pump keep on. When the level get the lower sensor it will open the contact, turning the pump off.
IMPORTANT Automatic drain control
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Flow and Level sensors for liquids
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DatasheetRev. 00 / 01-2011
