Northern Power Corp
Electricity Vietnam (EVN NPC) — Certified 22kV / 35kV Distribution Supplier
Proven Industry Reputation
Trusted by National Utilities & Global EPC Contractors
SOTEK Group operates as an approved vendor for major power utilities and international engineering contractors across Southeast Asia, North America, Australia, and Africa. Our ISO 9001:2015 manufacturing facility delivers type-tested oil-immersed, dry-type, and padmount transformers up to 21,000 kVA / 69 kV.
15+
Years of Grid Manufacturing
30+
Export Countries Worldwide
25,000+
Grid Units Operating
100%
IEC & IEEE FAT Compliant
Utility Vendor Approval
EVN Group & National Utility Subsidiaries
SOTEK is an officially audited and approved vendor across Electricity Vietnam (EVN) regional power corporations, supplying medium-voltage transformers for primary power grid expansions.
Central Power Corp
Electricity Vietnam (EVN CPC) — High-Efficiency Rural & Urban Grid Transformer Partner
Hanoi Power Corp
Electricity Vietnam (EVN HANOI) — Compact & Substation Infrastructure Provider
Southern Power Corp
Electricity Vietnam (EVN SPC) — Industrial Zone Substation & Line Partner
Ho Chi Minh City Power Corp
Electricity Vietnam (EVNHCMC) — Metropolitan Underground & Dry-Type Partner
International Grid Network
Global EPC Contractors & Overseas Power Corporations
From Philippines distribution utilities to Australian renewable developers, SOTEK engineers custom transformers designed to withstand harsh tropical, coastal, and desert operating environments.
Aboitiz Power
Philippines Grid Partner — Supply of IEEE & ANSI Compliant Padmount & Oil Transformers
BCM Construction
Substation & Transmission Line EPC Contractor — Heavy Industrial Substation Builds
VITECONS Construction
General EPC Builder — Industrial Park Power Infrastructure Integration
Tier-1 Material Integrity
Global Material & Component Suppliers
Transformer reliability depends on raw material purity. SOTEK sources exclusivement from world-renowned insulation, steel, and electrical component manufacturers to ensure 30+ year operational lifespan.
ABB Technology
High-Voltage Bushings & De-Energized Tap Changer (DETC) Components
Nexans Euromold
Screened Separable Connectors & Dead-Front HV Elbow Bushing Assemblies
GS Caltex Oil
High Dielectric Strength Mineral Insulating Oil & FR3 Synthetic Ester Fluid
Krempel Insulation
Thermal Class F/H Insulating Pressboard & Cellulose Barrier Systems
Hoa Sen Group
Heavy-Gauge Galvanized Steel for Weatherproof & Tamper-Resistant Tanks
Kansai Paint
C5-M Coastal Grade Anti-Corrosive Epoxy & Polyurethane Exterior Coating
Quality Verification & Audits
International Testing Standards & Factory Inspections
We welcome global engineering partners, third-party inspection agencies (SGS, Bureau Veritas, TÜV NORD), and utility auditing teams to perform Factory Acceptance Testing (FAT) at our ISO/IEC 17025 accredited laboratory.
Full Type-Test Documentation
Complete impulse withstand, temperature rise, and short-circuit withstand reports issued by accredited independent laboratories (KEMA, ASTA, VILAS 1183).
Witnessed Factory Acceptance Testing (FAT)
Remote video-streamed testing or on-site client inspections covering winding resistance, voltage ratio, partial discharge, and no-load/full-load losses.
Tailored Standards Customization
Engineering capabilities covering IEC 60076, IEEE C57, ANSI C57.12.28, TCVN 6306, and specific utility distribution grid codes across 30+ countries.
FOB & CIF Global Logistics Support
Heavy-duty seaworthy packaging, vacuum sealed wrapping, and full Incoterms compliance with direct ocean freight routing from Hai Phong Port.
B2B Engineering Collaboration
Become a SOTEK Grid Distribution Partner
Looking for a certified transformer manufacturer to support your utility tender, industrial park expansion, or renewable energy project? Contact our sales engineering team today.