An exceptional thunderstorm that took place on the last day of August caused an extremely powerful strike that put Poltava central high-voltage substation owned by UKRENERGO company out of operation. The strike hit static protection device on diphasic overhead 110kV transmission line. It took 11 minutes for the wrecking crews to resume of power supply for the city with estimated total power consumption at the rate of app. 33 megawatts. 
