grantwatson:
Hi All,I have a remote pump which fills water trough’s for cattle. This is done via a pressure cylinder, the pressure cylinder has a pressure cut off to stop the pump once the cylinder gets to pressure.
The cows on more than one occasion have broken a pipe causing the pump to run consciously for a number of hours.
I need something to tell me if the pump has been running for more than 5 minutes and if it has been to stop the pump.
If this is triggered then turn a light on that stays latched on until the system is reset.
The main problem is the pump is a 240volt AC
Thoughts?
Thanks
Grant
Make a block diagram of your system. You will see the pressure switch also starts the pump when the pressure drops below it's setting. Also note, you have a magnetic contactor or an electronic contactor to actually start and stop the pump motor.
What the next step is for you to determine the control voltage being used on the pressure switch and the motor contactor. That voltage is what your new component must be designed to handle. The actual AC current will be a couple of amps.
Your Arduino will control the operation of the new relay. And the new relay should probably be a solid state relay for reliability.
Paul