PARTIAL POWER INTERRUPTION
UPDATE 1 (June 28, 2025)
SIGNIFICANT INCIDENT NOTICE
(Information from TransCo)
Description of Outages:
Partial System Blackout (PSB) at Palawan Grid
Date: June 28, 2025
Time of Incident: 2355H
Probable Cause: Ongoing assessment
Affected Area: Puerto Princesa
Remarks: Delta P unit 2 Loadhunt prior to incident
Weather: Fair weather
Time of restoration:
01:08 AM – Poblacion Initial
01:17 AM – GMA Initial
01:20 AM – Iwahig Circuit
01:26 AM – Wescom Initial
01:40 AM – San Jose Initial
—–
UPDATE 2 (As of 1:46 AM | June 29, 2025)
SIGNIFICANT INCIDENT UPDATE
(Information from TransCo)
0146H – Delta P unit 2 and 4 automatically tripped due to overvoltage
0146H – Automatic Load Dropped Feeders (Iwahig, San Jose, Wescom)
Time of restoration:
0200H – VS2 (Iwahig Initial) Restored
0207H – VS12 (Wescom Initial) Restored
0213H – VS3 (San Jose Initial) Restored
0225H – VS11 (Lacsamana) Successfully Energized
Remarks: Ongoing restoration
UPDATE 1 (June 28, 2025)
SIGNIFICANT INCIDENT NOTICE
(Information from TransCo)
Description of Outages:
Partial System Blackout (PSB) at Palawan Grid
Date: June 28, 2025
Time of Incident: 2355H
Probable Cause: Ongoing assessment
Affected Area: Puerto Princesa
Remarks: Delta P unit 2 Loadhunt prior to incident
Weather: Fair weather
Time of restoration:
01:08 AM – Poblacion Initial
01:17 AM – GMA Initial
01:20 AM – Iwahig Circuit
01:26 AM – Wescom Initial
01:40 AM – San Jose Initial
—–
UPDATE 2 (As of 1:46 AM | June 29, 2025)
SIGNIFICANT INCIDENT UPDATE
(Information from TransCo)
0146H – Delta P unit 2 and 4 automatically tripped due to overvoltage
0146H – Automatic Load Dropped Feeders (Iwahig, San Jose, Wescom)
Time of restoration:
0200H – VS2 (Iwahig Initial) Restored
0207H – VS12 (Wescom Initial) Restored
0213H – VS3 (San Jose Initial) Restored
0225H – VS11 (Lacsamana) Successfully Energized
Remarks: Ongoing restoration