FIELD: controlling and measuring equipment, possible use for determining depth of elements of grounding device of power supply objects and traction substations of railroad transportation.
SUBSTANCE: in accordance to the invention, strength H1 of electromagnetic field is measured on earth surface above the element of grounding device. Sensor is moved to any point in space for known distance "a" to the side from element of grounding device and known height "b" above the earth surface, and strength H2 of electromagnetic field is measured. Depth of elements of grounding device is determined from formula 
EFFECT: movement of sensor away from element of grounding device on earth surface is not required, it is possible to determine depth from any point in space.
1 dwg
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