I am designing a control system to power and control a 3phase motor/pump. the hydraulic part is ok but the electrical part I am trying to figure out what circuit componets I reuqire to make it a safe system. (a professional comapny will bild this for me but i wld like to understand the system myself to control the cost)
I assume I need the following:
1. circuit Breaker (RCD)
3. Relay stack
I wonder how the level switch and pressure switches should be wired in the system. I am trying to look for eqipment in RS and Farnell...
Any block diagrams / pointers would be fantastic.
I have a single phase 240vac control on my 365' deep well. The off-the-shelf high/low pressure switch costs about 24-bucks, the 50-A contactor I bought surplus for $30. It is 3-ph but I only use one phase contacts and the 240vac activation coil.
This controls the contactor.