A client needs to find a way to tell when a wire that powers a remote water pump has been cut. There's been some cases of copper robbery in the area.
This wire can have power at any time (380V 3-ph) to start the pump. Or it may be off
The system has to be able to tell when the wire from the frequency regulator to the motor has been cut.
The motor ability to work shouln't be affected by this security system
and the system has to be able to safely work and avoid false positives either when the power os on or off.
I can't think of any solution for this right now, anyone?
Thanks in advance!