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Ground Rod
Measurement of Earth Resistance
- - Large scale grounding system such as mesh grounding
- - Multiple Neutral-Grounding System
- - Power transmission tower’s grounding
- - Communication lines and railway grounding
- - Cure oil/gas/chemical facilities grounding
- - Lightning Protection Grounding
- - Building structure grounding
Measurement of Earth Resistance
High precision measurement of soil resistivity by 4-pole Wenner’s method
Measurement of Earth Resistance
| - | Range of Measurement | Resolution | Accuracy |
|---|---|---|---|
| UST Noise voltage | 1V ... 50V DC+AC | 0.1V | ±(5% m.v.+5digit) |
| FST Indirect frequency | 16 ... 400㎐ | 0.1 ... 1㎐ | ±(1% m.v.+2digit) |
| Grounding resistance | 0.020Ω...300㏀ | 0.001Ω...100Ω | ±(2% m.v.+2digit) |
| RS Probe resistance | 0.020Ω...300㏀ | 0.001Ω...100Ω | ±(2% m.v.+2digit) |
| RH Rod’s resistance | 0.020Ω...300㏀ | 0.001Ω...100Ω | ±(2% m.v.+2digit) |
| Effective resistance | 0.020Ω...3㏀ | 0.01Ω | ±(2% m.v.+2digit) |
Measurement of Earth Resistance
- - Large scale grounding system such as mesh grounding
- - Multiple Neutral-Grounding System
- - Power transmission tower’s grounding
Analysis of Grounding Potential Rise
The analysis of grounding potential rise is essential in estimating hazard electric potential and reflecting the step voltage or contact voltage for a safe design of grounding system. Also, ground potential estimation results on power system’s fault current is closely connected to the facilities’ insulating ability. Such analyses and estimations for management of electrical facilities will provide very useful information for getting a reliable grounding system in building.
- Completion of grounding system design
- The analysis of grounding potential rise is essential in estimating hazard electric potential and reflecting the step voltage or contact voltage for a safe design of grounding system. Also, ground potential estimation results on power system’s fault current is closely connected to the facilities’ insulating ability. Such analyses and estimations for management of electrical facilities will provide very useful information for getting a reliable grounding system in building.