We’ve written previously about why we use CDEGS HIFREQ and (X)GSA_FD for earthing studies. Also, the reasons to invest in the top 1% of tools, knowledge and consultants. But once you’ve invested in building the model to understand what earthing is required, what are the other things you can do with this model. Additionally, answer other questions you might have?
[Read more…] about Not Only Earthing Studies. Other things you never realised YOU could do!Electrical Earthing Post List
Comparison between XGSLab and CDEGS
In his previous blog, Ian explained our decision to work with XGSLab, on the basis that it is an equally capable tool as CDEGS, that is much easier to use. In this blog, I’m going under to hood, so to speak. Comparing CDEGS with XGSLab to show you some real-world examples where CDEGS and XGSLab give almost identical results.
Therefore, in all of these examples, we have completed and verified the earthing design for these sites and found good agreement between the modelled results and the post-installation measurements. On this basis, we can say that XGSLab matches CDEGS for accuracy, and both tools have good agreement with the real-world measurements.
[Read more…] about Comparison between XGSLab and CDEGSWhy Ground Testing is Important to Maintain Adequate Grounding And Bonding
Ground testing is typically performed in two stages. The first is conducted during the construction of a building to ensure proper installation of the electrical system. And the second involves routine ground testing to ensure the ‘actual’ arrangements perform as ‘predicted’ at the design stage. Thus, to avoid costly and fatal errors.
What is the Difference between Grounding and Bonding?
[Read more…] about Why Ground Testing is Important to Maintain Adequate Grounding And BondingEarth Testing Procedures in Urban Environments
Electrical earth testing can be a real challenge in built-up areas. Not only are there very few soft areas to deploy the test probes, but underground cabling and conductive structures are everywhere. These two factors massively affect the measured readings leading to measured values that bear no relation to the actual electrode tested. Therefore, what follows is the Earth Testing Procedure Greymatters adopts.
Step 1
Follow the guidance in HSG47. The city or town’s infrastructure produces large amounts of in-ground noise and interference. Mitigation by reading buried service/cable records; observing signs of previous excavations; and use a cable avoidance tool (CAT) can make sense of where the structures are.
[Read more…] about Earth Testing Procedures in Urban EnvironmentsEarthing System Design Procedure A Probabilistic Approach
What are the procedures for creating an HV Earthing System Design? Also, how might these differ from an LV Earth design?
Firstly, although the principles underpinning HV and LV earthing are similar, the approaches are very different.
Probabilistic Approach
The first huge difference is the recognition that HV electrical earthing design is probabilistic in nature. Whereas LV earthing is far less so.
What do I mean?
[Read more…] about Earthing System Design Procedure A Probabilistic Approach