Pump and level control
Manual and Automatic Pump Operation in a Two-Tank Water Transfer System with Liquid Level Relay
What is manual and automatic two-tank water transfer?
It is the automatic two-tank water transfer system with manual operation added through a selector switch. In automatic the liquid level relays control the pump; in manual the operator uses start-stop buttons.
Where is it used?
It is used in building, housing estate and industrial water transfer systems. The pump must be runnable by hand during electrode faults, tank cleaning, maintenance and testing.
Power circuit and control circuit
The power circuit is the pump motor, circuit breaker, contactor and overload relay. The control circuit has the selector switch, start-stop buttons, seal-in contact and two liquid level relays. The relays are supplied only in automatic mode.
What to watch out for
In manual the level protections are bypassed, so the pump should be run under the operator's supervision.
Parts used
- Motor 3~
- M1
- Liquid level relay (SRR)
- SRR1, SRR2
Run it in the simulator.
This circuit is ready in the CoilPath library. Open it, press the buttons and follow the current. It also comes with a wiring view and a panel layout.
Related circuits
- Manual and Automatic Pump Operation Using a Liquid Level Relay (NO Contact) and Float Switch
- Manual and Automatic Pump Control with Signalling, Using a Liquid Level Relay (NO Contact) and Float Switch
- Automatic Pump Operation with an Upper-Level Float Switch
- Automatic Pump Operation with a Lower-Level Float Switch
- Automatic Tank Filling Control with Lower and Upper Float Switches
- Manual and Automatic Pump Operation