Iec 61936-1:2021 [best]
For example, at 245 kV rated voltage, the minimum phase-to-earth clearance in air for a lightning impulse withstand of 1050 kV is typically 2.1 m (under standard conditions).
MarmaleadMarmaleadFor example, at 245 kV rated voltage, the minimum phase-to-earth clearance in air for a lightning impulse withstand of 1050 kV is typically 2.1 m (under standard conditions).