Earth Impedance measurement

[Bjtpower_magic]

Folks,
Hope you are doing well.

i am building Hardware Circuit where i would like to add Earth Resistance measurement, anyone knows how we can measure it?

 

[KlausST]

Hi

an internet search "how to measure earth resistance". Gives several million hits.
Nothing new. Nothing special.

Are you looking for something special? Then tell us.

Klaus

 

[cupoftea]

If its earth resistance down long mains cable, then its often done by time domain reflectometry.
The chargepoint testers do it as a routine.
Otherwise...just get a current source and push current through your measurement points, and measure the voltage between your measurement points, then V/I

 

[Easy peasy]

Earth resistance around a power station for example is done by injecting known currents into driven earth stakes and measuring the volt drop of these - with enough measurements one can plot a surface of earth resistance over the area of interest ...