Just in time for the rainy season, Subic EnerZone Corporation (SEZ) recently completed the annual preventive maintenance (APMS) of its substations last June 28.
SEZ’s Substation and Electrical Engineering Department (SEED) conducted the APMS of the company’s Subic 100 MVA Substation, Remy Field Substation, SBIP Substation, Maritan Substation and Cubi Substation. SEED personnel conducted tests on the power circuit breakers (PCBs), protection relays, and other substation equipment, while contractors handled the complete electrical test of the power transformers.
There was no power interruption during the activities at Cubi and Maritan Substation since load was transferred via tie feeders, in addition to minimal power interruption for Remy Field and SBIP substations.
The SEZ 100 MVA Substation serves the Remy Field, Maritan, Cubi, and SBIP substations. SCADA remote control test per feeder were performed to ensure remote switching of feeders during outages. SEED and TND (Transmission and Distribution Department) personnel also performed hotspot, oil leak correction, and cleaning of power cable termination. Contractors completed the electrical test of the power transformers.
Meanwhile, the substation’s medium voltage circuit breakers, switchgears and relays were tested. Some old relays were upgraded with new SEL relays and remaining hot shrink terminations of feeder power cables were also replaced with 3M Cold Shrink termination kits.