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generate on the measured loop. The Meter will measure E & I, and the measured
resistance R can be obtained by the following formula.
2. Principle of Current Measurement
The basic principle of
ETCR2000C
in the measurement of current is the
same with that of the 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
1;
The Meter will measure I
1
, and the
measured current I can be obtained by the 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
