Awareness of step and touch potential, caused by a rise of earth potential. Is essential for anyone working on high-voltage power transmission and distribution systems above 1 kV. A rise of earth potential A rise of earth potential is caused by electrical faults that occur at electrical substations. Power plants, or high-voltage transmission lines. Therefore, short-circuit […]
Earthing Calculations regarding your safety – you’re overdue an update! If 1-ohm is still in circulation on your documentation then this section applies to you. Even though the Earthing Calculations for determining a safe System Earth (Ground) has shifted away from an arbitrary resistance figure, usually <1 ohm. It’s still all too common to see […]
Awareness of step potential and touch potential risks, caused by an earth potential rise. Is vital for anyone working on high-voltage power transmission. Also, distribution systems above 1 kV. Earth Potential Rise Earth potential rise (EPR) is caused by an imbalance of electrical charges between the earth and an electrical system, it can occur at: […]
What is ‘HOT-ZONE’ or ‘Hot-Site’? There are so many misconceptions surrounding the whole concept of a‘Hot-Site’ and ‘Hot-Zoning’ for Electrical Earthing Designs. In this article, I attempt to simplify what ‘Hot Zone’ (or Hot Site) means in Power System terms AND crucially, explain what a ‘Hot Zone’ is not. By the end of this article, […]
Electrical Earthing Science… On a recent generation project, there was a need to connect a partially completed system to the network as part of a staged commissioning. This meant that the full electrical earthing system had not been fully installed.
Soil Resistivity testing why measure? is Part 2 in a series of short posts on Soil Resistivity Testing and the common mistakes encountered, with practical advice on how to avoid Soil Resistivity Testing 10 Common Mistakes. Soil Resistivity Testing 10 Common Mistakes This is a series of short posts on Soil Resistivity Testing and the […]