MI 3290 Earth Analyser
Appendix C
–Functionality and placing of test probes
148
Figure C.2:
Definition of parameter
a
Straight-line placement
Figure C.3:
Straight-line placement
After the maximum dimension
a
of an earthing system is defined then measurements can be
performed by proper placement of test probes. A measurement with three placements of test
probe S (S’’, S, S’) is intended to verify that the selected distance
d1
is long enough.
Distance from tested earthing electrode system E/ES to current probe H shall be:
a
d
5
1
Distance from tested earthing electrode system E/ES to potential probe S shall be:
1
1
2
38
,
0
62
,
0
a
d
d
a1 .............. distance between connection point of earthing system and center.
Measurement 1
Distance from earthing electrode E/ES to voltage probe S shall be:
2
d
