The required phase-to-phase clearance for a 33kV overhead line is not a single, universal value. It is determined by national and regional electrical codes and standards (e.g., IEC, IEEE, or specific national standards like the Indian Electricity Rules). For example, some standards might require a minimum clearance of 431.8 mm (17 inches) for outdoor installations, while others may specify different values based on a variety of factors. These clearances are a safety margin to prevent a flashover caused by electrical surges, lightning, or a physical swing of the conductors.

The clearance value is a result of a complex calculation that considers the Basic Impulse Level (BIL), which is the line's ability to withstand high-voltage surges. Our equipment, designed for precision, helps engineers and construction crews adhere to these strict standards.