Measurement of Grounding resistance with Sonel devices

Earth resistance measurement

1. Roman Domański. Chief Engineer of T echnical support Measurement of Grounding

2. str. S. Wokulskiego 11; 58-100 Świdnica tel. [phone] tel. + 4874 85 83 838

3. Measurement of ground resistance and soil resistivity. Rules and measuring equipment .

4. Meters of g round resistance and soil resistivity MRU-200, 200 GPS, 120, 30, 20 specialized measurement . MPI-520,525, 530 multi-function meter ( technical method ) MPI-505, MPI-508, MPI-502, MZC series – ( Short-circuit impedance )

5. Iu - fault current Uk - step voltage Ur - Touch voltage Uc - Total voltage Re - resistance to ground Distribution of electric potential around the grounding

6. Measurement of ground resistance F all-of- P otential method

7. Measurement of ground resistance F all-of- P otential method

8. Measurement of ground resistance F all-of- P otential method

9. Measurement of ground resistance F all-of- P otential method

10. Measurement of ground resistance F all-of- P otential method - example

11. Soil - alkaline rocks , diorytoids and gabroids . Resistivity - 2000  m to 8000  m 500m Measurement of ground resistance F all-of- P otential method – positioning electrodes

12. METERS - MRU-21, MRU-20 The measurement of ground resistance – Fall-of- Potential method 3 w Noise immunity - the measurement with 125Hz signal, m easurement of interference voltage. Measurement of continuity of protective and equalization system.

13. Standard accessories MRU-21 Standard accessories MRU-20 Additional accessories METERS - MRU-21, MRU-20

14. Measurement of grounding using Fall-of- Potential method – 3W Single grounding Conection Reinforced steel

15. Fall-of- Potential method . Measurement of ground resistance – 3W

16. Ground electrode as a rim and integration into foundation .

17. Additional Accessories Standard Accessories Meter of the Ground resistance and resistivity of soil MRU-105

18. Measurement of the Ground r esistance using 3-wire s and a clamp C3 Measurement of ground resistance – method 3w + clamp

19. Measurement of the Ground resistance using 3-wire s and a clamp C3

20. Measurement of the Ground resistance using 3-wire s and a clamp C3

21. Measurement of the Ground resistance using 3-wire s and a clamp C3 - Troubleshooting

22. Pylon Grounding - rim metal construction rim

23. ERP-1 and clamp FS

24. Measurement of the Ground resistance using 3-wire s , a clamp F and ERP-1

25. Measurement of the Ground resistance using 3-wire s , a clamp F and ERP-1

26. Measurement of the Ground resistance using 3-wire s , a clamp F and ERP-1

27. 1 2 3 P H Potential probe S – HV pylon Potential probe S Potential probe S H – Current probe P – Measurement point Measurement of the Ground resistance using 3-wire s Positioning of Electrodes

28. Measurement of the Ground resistance using 3-wire s Positioning of Electrodes

29. Measurement of the Ground resistance using 3-wire s Positioning of Electrodes

30. Measurement of the Ground resistance using 3-wire s Positioning of Electrodes

31. Measurement of the Ground resistance using 3-wire s Positioning of Electrodes

32. Measurement of the Ground resistance using 3-wire s Positioning of Electrodes Street lights MV/LV Sub-station LV line

33. Measurement of ground resistance : Fall-of- potential method 3P/4P, Fall-of- potential method with clamps – multiple grounding Possibility to measure multiple grounding without having to unfasten bonding with the help of additional clamps or two-clamp method . Measurement of soil resistivity . Ground resistance and soil resistivity meters : MRU-30, MRU-120

34. Additional accessories Standard accessories Ground resistance and soil resistivity meters : MRU-120

35. Ground resistance and soil resistivity meters : MRU-30

36. MRU-200,-120,-30 – two clamps method How to connect the meter in two clamp s method ?

37. Equivalent circuit in two clamps method MRU-200,-120,-30 – two clamps method

38. Ground resistance and soil resistivity meter : MRU-200 Measurement of ground resistance : Fall-of- potential method 3P/4P, Fall-of- potential method with clamp – multiple grounding Two-clamps method Voltage pulse method. Three shapes of pulse available . Noise immunity - automatic selection of the measurement frequency . Measurement of soil resistivity .

39. Additional accessory Standard accessory Ground resistance and soil resistivity meter : MRU-200

40. Shape of the impuls of the voltage pulse method U max =1,5kV, I max = 1A MRU-200 – voltage pulse method Selection of the voltage puls: 4μs/10μs, 8μs/20μs, 10μs/350μs. t = current amplitude T1 = duration of the f ront of the puls T2 = duration till half value

41. High voltage line

42. MRU-200 – voltage pulse method System for measuring the dynamic resistance ( voltage pulse method 4 w ) Warning! Leads connected to the H and S should be fully developed and spread out for a minimum of 60 

43. MRU-200 – voltage pulse method - example

44. Resistivity of soil Model of resistivity measurement ( dimensions 1mx1mx1m) U I

45. Measurement of the resistivity of soil using Wenner method

46. a a a A V E 1 E 2 E 3 E 4 r=2p aU/I Measurement of the resistivity of soil using Wenner method

47. Measurement of the resistivity of soil at various depths

48. Measurement of the resistivity of soil using Wenner method

49. Measurement of the resistivity of soil using Wenner method

50. Measurement of the resistivity of soil using Wenner method

51. 51 Contact . Sonel S.A. str. Wokulskiego 11, 58-100 Świdnica Contact: tel. [phone] e-mail: [email protected]

52. 52 Thank you for your attention !