: It served as a guide for determining safe air clearances in substations, helping to prevent flashovers that could lead to equipment damage or outages. Current Status and Supersession
Insulation coordination is not merely about choosing a higher BIL. It is about matching the environmental reality to the electrical stress . IEC 60071-3 provides the only internationally harmonized procedure to do that for clearance and creepage distances. Iec 60071-3