Hi
I need to close a switch whenever a current in a wire exceeds the current in another by a multiple (probably 3)
eg if current in wire A is 3amps and current in wire B is >1amp then close switch. This needs to be checked only once every 3 secs or so.
Am I right in thinking that if I run both wires through identical coils but put A through once and B through 3 times then that will make the comparison between two equal currents?
BTW the currents are 240v. Max in A could be 100amp, B 16amp.
If someone could point me to an off the shelf comparator module which will accept the inputs from the two coils I would be very grateful.
I need to close a switch whenever a current in a wire exceeds the current in another by a multiple (probably 3)
eg if current in wire A is 3amps and current in wire B is >1amp then close switch. This needs to be checked only once every 3 secs or so.
Am I right in thinking that if I run both wires through identical coils but put A through once and B through 3 times then that will make the comparison between two equal currents?
BTW the currents are 240v. Max in A could be 100amp, B 16amp.
If someone could point me to an off the shelf comparator module which will accept the inputs from the two coils I would be very grateful.