NordiConsult AS | Earthing plate resistance measurements
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Ground earth resistance/earthing plate measurements

It is extremely important to measure ground earth resistance to safeguard against potentially dangerous touch voltages that could put both line workers and the local population at risk.

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It has also proved an excellent method of determining whether an installation is properly earthed and whether the technical equipment is thus protected against overvoltages.
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The measurements can also indicate whether there are faults in the system, such as a faulty continuous-earth terminal, lack of contact with the earth electrode etc.
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In other words: The purpose of good earthing is to ensure the safety of both people and technical assets.
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However, earth faults can occur in an electrical system while ground earth resistance is being measured, and the resulting current flows could be life-threatening for the person carrying out the measurements. Even though inspection of protective earth systems is not defined as live-line work, it is important to be aware of the risk of potential differences.
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NordiConsult has drawn up thorough procedures for measuring earth ground resistance, and has an established HSE system in place that will be presented on request. Our HSE system forms part of the overall quality assurance system that governs our day-to-day work. We work in accordance with the Safety regulations related to the maintenance and operation of electrical installations, and we organise safety courses on a regular basis. We also organise courses to familiarise our personnel with any specific instructions issued by our clients.

NordiConsult will carry out ground earth resistance/ earthing plate measurements using the customer’s preferred method:

  • The full-scale method using nine measurements in the forward direction
  • The fall-of-potential method using nine measurements in the forward direction and two measurements in the backward direction from the electrode
  • The fall-of-potential method using two measurements in the forward direction and two measurements in the backward direction from the electrode
  • Measurement of earth resistance usingĀ  a clamp ohm meter

Data capture and web solution

  • We record measurement data, retrieve GPS positions and link them to the correct object IDs.
  • We present the data electronically in NordiConsult Express, so that the data can be easily evaluated by the customer.
  • We transfer the data electronically, so that you can print them out or download them to your company’s own systems.

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The NordiConsult Express web solution gives you and your colleagues access to the data. You simply log in to get a full overview of the field measurements.

Picture show REN’s recommended measurement; The fall-of-potential method using two measurements in the forward direction and two measurements in the backward direction from the electrode.
Situation Plan; Data retrival; All metering points are recorded with GPS position and posted on electronic maps (the National Map and Google MAP)
The fall-of-potential method using nine measurements in the forward direction and two measurements in the backward direction from the electrode.
Ground earth resistance measurements.