Earth Impedance measurement

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Bjtpower_magic

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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?
 

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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
 

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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
 

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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 ...
 

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