SOTEK Group has reached another major international milestone with the successful delivery and site commissioning of a multi-unit order of heavy-duty medium-voltage distribution transformers to Aboitiz Power Corporation, one of the largest and most prestigious power generation and distribution utilities in the Philippines.
This major contract reinforces SOTEK’s engineering reputation as an internationally certified manufacturer capable of meeting the stringent technical requirements of regional distribution utilities, including Visayan Electric Company (VECO) and Davao Light & Power.
1. Project Technical Challenges & Customized Solutions
Operating distribution transformers in the Philippine archipelago demands superior design resilience against extreme climatic conditions:
- Tropical Coastal Salinity & High Humidity: Units are exposed to salt-laden marine air and frequent typhoon-season driving rains. SOTEK applied a multi-layer epoxy-polyurethane marine protective coating system compliant with ISO 12944 Category C5-M, complemented by hot-dip galvanized radiator tanks and stainless steel hardware.
- Seismic & Wind Withstand: Fabricated with reinforced internal core-coil bracing to endure high seismic acceleration forces without core displacement.
- Low Loss Guarantees: Engineered with precision laser-cut CRGO magnetic cores to strictly comply with utility loss evaluation limits, reducing annual greenhouse gas emissions across the utility’s distribution network.
2. Factory Acceptance Testing (FAT) & Quality Verification
Prior to shipment, the entire transformer batch underwent comprehensive Factory Acceptance Testing (FAT) at SOTEK’s ISO/IEC 17025 (VILAS 1183) Accredited Testing Laboratory. All routine electrical tests—including ratio verification, winding resistance, no-load loss, full-load loss, dielectric insulation breakdown, and high-voltage power-frequency withstand—were observed and fully approved by utility inspection representatives, verifying 100% compliance with IEC 60076 and utility technical specifications.
