About Seatrust
Our History
Seatrust is a professional distribution transformer manufacturer based in China, with over 30 years of experience specializing in the design and manufacturing of oil-immersed and dry-type distribution transformers.
The company operates a 45,000 m² manufacturing facility with 248 skilled employees and a dedicated R&D team of more than 50 engineers. Seatrust's annual sales revenue exceeded RMB 100 million in 2025.
With a strong focus on power distribution applications, Seatrust supplies distribution transformers ranging from 25kVA to 5000kVA, with voltage levels up to 35kV, serving utility companies, EPC contractors and industrial users worldwide.
Seatrust is equipped with complete testing facilities to perform routine tests, type tests and factory acceptance tests (FAT) in accordance with IEC 60076, ANSI/IEEE C57 and other relevant international standards. Selected transformer models have passed independent type tests by KEMA (DNV) and UL in accordance with international standards.
All distribution transformers are manufactured in Seatrust's own facility, including core stacking, coil winding, vacuum oil filling and final assembly. Routine tests, type tests and factory acceptance tests (FAT) are conducted according to IEC and IEEE standards prior to delivery.
Typical Application Scenarios
- •Utility power distribution networks
- •Industrial power supply systems
- •Renewable energy projects
- •Commercial and infrastructure projects
Seatrust's team is familiar with utility tender requirements and the preparation of complete technical documentation. The company is committed to delivering reliable, compliant and cost-effective distribution transformer solutions for global power distribution projects.
Virtual Factory Tour
Explore our state-of-the-art manufacturing facility in immersive 3D. Walk through production lines, quality control labs, and testing facilities from anywhere in the world.
Start Virtual Tour
Click to explore our factory in 3D
Production Lines
Automated assembly and winding stations with precision equipment
Testing Facilities
High-voltage labs for impulse, temperature rise, and sound level tests
Quality Control
Inspection stations at every stage ensuring zero-defect manufacturing
Our Core Values
These principles guide every decision we make and every product we build.
Quality First
We never compromise on quality. Every transformer undergoes rigorous testing to ensure it meets or exceeds international standards.
Customer Focus
We build long-term relationships by understanding our customers' needs and delivering tailored solutions that add real value.
Global Standards
We design and manufacture to ANSI/IEEE, IEC, CSA, and other global standards to ensure compatibility and safety worldwide.
Certifications & Quality Assurance
Seatrust maintains the highest standards of quality and compliance through internationally recognized certifications.
Factory Certifications
ISO 9001:2015
Quality Management System
Valid: 2025
ISO 14001:2015
Environmental Management
Valid: 2025
ISO 45001:2018
Occupational Health & Safety
Valid: 2025
ISO 50001:2018
Energy Management System
Valid: 2018
Type Test Reports
Type Test Report S20-M-2500-11
2500 kVA Pad Mounted Transformer - Series 1
Type Test Report S20-M-2500-22
2500 kVA Pad Mounted Transformer - Series 2
Type Test Report S20-M-2500-33
2500 kVA Pad Mounted Transformer - Series 3
UL Certificate
Seatrust UL Safety Certification
Preview Only: You can view these reports online for reference. To download the complete test reports with all technical data and certifications, please request access below.