Power Network Application Trainer
– Earthing / Grounding network impedance measurement
110
Expected result for foot number 1&2:
Since this measurement gives result for foots 1 & 2, measurement needs to be repeated
also on the other two foots (3 & 4).
Move the clamp to the next foots (sequential to foots 3 & 4) and repeat the
measurement.
Expected result for foot number 3 & 4:
To get total object impedance, we need to calculate it from the individual values. Four
legs pylon could be presented as parallel connection of four impedances, so the
calculated object impedance is:
Foot Nm. 1& 2
6,27
Ω
Foot Nm. 3& 4
4,60
Ω
Total impedance
2,65
Ω
Table 33-
2: Pylon foot’s impedance
Comparing to the prevoius exercises, this method requires only two measurements and
it is faster than previous ones. Since two foots are measured in same step there is no
clear info about the single foot condition. If we assume, that measured value is not
regular, we suggest to perform single pylon foot measurement.
Summary of Contents for MI 3298
Page 55: ...Power Network Application Trainer Earthing Grounding network impedance measurement 55 ...
Page 56: ...Power Network Application Trainer Earthing Grounding network impedance measurement 56 ...
Page 124: ...Power Network Application Trainer Earthing Grounding network impedance measurement 124 ...
Page 228: ...MI 3290 Earth Analyser 228 ...
Page 229: ...MI 3280 Digital Transformer Analyser 229 ...
Page 230: ...MI 3280 Digital Transformer Analyser 230 ...
Page 231: ...MI 3250 MicroOhm 10A 231 ...
Page 232: ...MI 3205 TeraOhmXA 5kV 232 ...