Damage to Lightning Arrester 132kV

In early December 1969, around 11.30PM , a huge blast occurred which made almost all the people surrounding Balangoda Grid Substation,alive.
No body knew what it is until the following day. It was a busting of 132kV Lightning Arrester due to a lightning stroke in the 132kV system.These things happen very rarely and there was no communication at all for the people to know unless it passed by mouth to mouth.The ceramic Arrester damaged into pieces without causing any injury to in workmen who were on duty inside the control room, a few meters away.
It was replaced the following day by the heavy maintenance unit who traveled from distance location.