Measurement Method Of Grounding Resistance; Multi-Point Grounding System - ADInstruments AD6412 Manual De Usuario

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measurement of resistance, as shown in the figure below. The AC current on the
measured wire, through the current magnetic loop and coil, can generate a induction
current I The Meter will measure I , and the measured current I can be obtained by the
1; 1
following formula.
Where: n is the turn ratio of the secondary side vs. primary side.
IX. Measurement Method of Grounding Resistance

1. Multi-Point Grounding System

As for the multi-point grounding system (such as electricity transmission tower grounding
system, grounding cable communications systems, certain buildings, etc.), They usually
pass the overhead ground wire (cable shielding layer) connected to form a grounding
system.
R R R R
1
2 3 4
As the Meter is in the above measurement, its equivalent electric circuit is shown in the
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Manual de usuario AD6412