Single-Point Grounding System - ETCR ETCR2000+ Manual

Where: R1、R2、......R
bodies.
、R
R
1T
Meter in the different grounding branches.
It is nonlinear equations with N unknown numbers and N equations.
It indeed has a definite solution, but it is very difficult to solve the
issue artificially, even impossible when N is larger.
Therefore, you're expected to buy the Limited-Point Grounding
System Solution software produced by this Company. Users can
use the office computer or notebook computer to carry out
solutions.
In principle, in addition to ignoring the mutual resistance, this
method does not have the measurement error caused by
neglecting R
0
However, users need to pay attention to that: in response to the
number of the grounding bodies mutually linked in your grounding
system, it is necessary to measure the same number of the testing
values for calculating of the program, not more or less. And the
program would output the same number of grounding resistance
values.

3. Single-Point Grounding System

From the measuring principle, ETCR series Meter can only
+
R
N
1 1
+ +
R R
1 2
are grounding resistances of N grounding
N
、......R
2T NT
.
.
1
=
R
1
+
......
R
− ) 1
( N
are the resistances measured with the
-21-
NT