What parameters characterize BIL? By Posted 19/07/2018 In What parameters characterize BIL?2018-07-192018-07-19https://www.moderninsulators.com/wp-content/uploads/2021/09/modern_insulators_iso_logo.pngModern Insulators Limitedhttps://www.moderninsulators.com/wp-content/uploads/2021/09/modern_insulators_iso_logo.png200px200px 0 0 a. Temporary over voltages (TOV) and b. Transient over voltages – Slow Front Over voltages(SFO), Fast Front Over voltages (FFO) & Very Fast Front Over voltages (VFFO)