... , 85.5kV,95.0kV,104.5kV,114.0kV,132.3kVb)Under thunder lighting surge current: 63kV,72kV, 81kV,90kV, 99kV,108kV,126kVc ... (climax value):a) Under steep-wave surge current: 66.5kV,76.0kV , 85.5kV,95.0kVb) Under thunder lighting surge current: 63kV,72kV ... , 81kV,90kVc) Under operation surge current: 53.9kV, 61.6kV ...