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28
24
20
16
12
8
4
0
0
1
Jan.
Temporal change of the earthing resistance of a conductor earth electrode
(earth strip, earth cable).
14
12
10
8
6
4
2
0
0
1
Jan.
Temporal change of the earthing resistance of a buried earth electrode (earth
pipe, earth plate)
2
3
4
5
month
2
3
5
4
month
Earthing Resistance
Principle of Operation
6
7
8
9
July
6
7
8
9
July
10
11
12
Dec.
edw055.eps
12
10
11
Dec.
edw056.eps
77
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