Davao Light and Power Co. explained that the power interruptions the other night, October 6, was caused by a problem on the National Grid Corporation of the Philippines’ (NGCP) Davao-Digos 69kV line. This has caused service disruptions to areas served by Davao Light’s Puan and Dumoy Substations.
The interruption, which started at 7:32 p.m., has affected customers from Talomo Bridge up to the entire areas of Puan, Dumoy and Toril Proper.
Under a heavy downpour with lightning and thunder, the NGCP and the Davao Light linemen conducted simultaneous line survey in the vast areas of Mintal, Bago Oshiro, Toril up to Darong to determine the cause of the problem.
After a thorough line survey by both Davao Light and the NGCP, it has been found that the cause of the emergency shutdown of NGCP’s Davao-Digos 69kV line was due to a broken post insulator at UP Mindanao in Bago Oshiro.
At 10:16 p.m., Davao Light was able to conduct full restoration of power in the affected areas. This was after transferring the loads of Dumoy and Puan substations from the affected NGCP Digos 69kV line to Davao Light-owned Davao Line 1.
Furthermore, the NGCP reported that the broken post insulator was already repaired and that the affected Digos 69kV line was restored at 11:48 p.m..
Davao Light deeply apologizes to its customers for the inconvenience brought about by this power interruption which is beyond its control.