I am making a automatic water level controller for my home. I am using a MCU to turn ON/OFF submersible water pumps using a float switch to detect water level in overhead tank.
This pump has a start switch (normally open), and a stop switch (normally closed), connected with a contactor.
For my project I want to replace these mechanical switches with a 5 V, 10 A relay, which is controlled using the MCU.
I am stuck with how to interface the contactor (ON/OFF) mechanism with the relay's (NO and NC) contacts. I am planning to use a general purpose relay, something like this but of 10 A capacity: General purpose capacitor.
Here is an block diagram for it.
The submersible pump here is 2 hp, 230 V, single-phase. Can anyone suggest me how to do it or direct me to an article that helps?