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:
- electrical substations,
- power plants,
- or high-voltage transmission lines.
Therefore short-circuit current flows through the plant structure and equipment and into the earthing electrode.
This imbalance can be caused by a variety of factors, including:[Read more…] about Reducing the Risk of Step and Touch Potential