I am building a household water purification skid. There are four pumps used for various functions during the process.

I need to understand how to choose the correct type, curve and rating of the circuit breaker for the system. I prefer using EATON products.

Each motor is in the order of 1 kW on 230VAC with a stated running current of 5A.

My second related question is if you would use a relay or a contactor to activate the motor?

If you need more info please ask and I will dig the specs for the motors up.

Thanks in advance!