Are you involved in Power Systems Design? You can now watch tens of hours of webinars in just a few minutes as I’ve summarized the top 3 ideas from over 17 technical webinars during the past 12-months.[Read more…] about Power Systems designer?… Struggling for time to stay updated?
Earthing System Design
Earthing 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.
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
November 2018 – Earthing Standards update (Rail)
Earthing Standards Update. For the past few years. GreyMatters has been fortunate enough to support the rail electrification and upgrade programmes across the UK for Earthing Design. And maintaining a consistent approach. Across a building programme of this scale. Can be a massive engineering headache for all design teams concerned.
Especially, when Earthing Standards touches on so many disciplines along the way. From civils, OLE (Overhead line equipment), signals, EMC, 3rd parties, ecologies, geophysical. As well as the more obvious general E&B (earthing and bonding).[Read more…] about November 2018 – Earthing Standards update (Rail)
How to Size High Voltage Earthing HV Conductors Correctly
The correct sizing of high voltage earthing (grounding) conductors is crucial for the safe and efficient operation of any electrical system. The size of the grounding conductor should be determined based on the maximum fault current that the system is likely to experience. As well as the voltage level and the type of earthing system being used.
In general, the grounding conductor should be sized to carry the maximum fault current for a specified duration without overheating or causing damage to the conductor or surrounding equipment. This can be determined using industry-standard calculation methods and guidelines. Such as those provided by the National Electric Code (NEC) or the International Electrotechnical Commission (IEC).
What size conductors should I use?
There a simple table I can use for this HV high voltage earthing design project. These are great questions and often asked. This post answers these questions together with the choice of conductor materials and jointing method within a high voltage earthing design project.
Assessing conductor size is entirely dependent on the electrical configuration and the load that the conductor must take. For example, an above-ground bonding conductor serves to transfer current with minimal voltage drop, from A to B. A directly buried conductor has an additional purpose. That of leaking the fault current or voltage into the local geology (as part of an electrode).[Read more…] about How to Size High Voltage Earthing HV Conductors Correctly
Putting electricity in perspective – a view from an earthing designer
We like to think electricity has been around for years, right? It certainly ‘feels’ like we should know all there is to know. But as an earthing designer. The scientific community tells us we humans are not good at time perspective that falls outside our immediate field of vision. No surprises here. But, I thought it would be interesting to add a wider time-perspective to electrical energy, which in turn, might explain WHY so few (relatively) know and understand the process of earthing design, and what an Earthing Designer is all about, i.e. what the earthing designer can deliver.[Read more…] about Putting electricity in perspective – a view from an earthing designer