EN
Manufacturing Base
The factory area expanded to 200,000 square meters in 2024, supporting transformer production, assembly and testing activities.
LARGE-SCALE FACILITYManufacturing Strength
Scale, equipment and experience for diverse transformer projects
YAWEI combines a large manufacturing base, dedicated high-voltage facilities, specialized production equipment and international project experience.
Dedicated Workshop
A dedicated 500 kV workshop was added in 2021 to strengthen YAWEI’s high-voltage manufacturing infrastructure.
HIGH-VOLTAGE CAPABILITYPower Transformer Range
YAWEI’s power transformer portfolio covers voltage applications from 3 kV to 400 kV and rated capacity up to 240 MVA.
UP TO 240 MVASpecialized Equipment
Core cutting and slitting, automatic stacking, vertical and horizontal winding, epoxy vacuum casting and robotic welding support key manufacturing stages.
INTEGRATED PRODUCTIONDigital Production Management
ERP management has supported production planning, information coordination and operational management since 2012.
DIGITAL COORDINATIONInternational Project Experience
YAWEI equipment has been supplied across South America, North America, Asia, Australia, Europe and Africa.
GLOBAL DELIVERYProduction Process
Eight coordinated stages from materials to shipment release
Each stage combines defined process controls, quality records and a clear contribution to transformer performance and delivery reliability.
01MATERIAL CONTROL
Incoming Materials
Confirm conductor, silicon steel, insulation, oil, bushings and purchased components against the approved specification.
- Material identity and batch
- Certificate and dimensional checks
- Accepted / rejected status
02PRECISION PROCESS
Core Cutting & Stacking
Silicon-steel cross-cutting, slitting and automatic stacking equipment supports accurate, consistent core manufacture.
- Cutting and slitting accuracy
- Step-lap / joint control
- Core dimensions and clamping
03PRECISION PROCESS
Winding
Vertical and horizontal winding machines support different winding structures, capacities and production requirements.
- Turns and conductor identity
- Tension and geometry
- Inter-turn insulation
04INSULATION CONTROL
Insulation, Drying or Casting
Epoxy vacuum casting supports dry-type insulation manufacture, while oil-immersed units follow controlled insulation, drying and oil-processing procedures.
- Insulation material control
- Drying / casting cycle
- Moisture and cleanliness
05PRECISION PROCESS
Tank & Structural Fabrication
Robotic welding and controlled fabrication processes support tank consistency, sealing performance and structural quality.
- Welding and dimensional control
- Leak / sealing checks
- Surface preparation and coating
06MATERIAL CONTROL
Final Assembly
Core, windings, tank, bushings, tap equipment, cooling and monitoring devices are integrated to the approved design.
- Connections and torque
- Clearances and accessories
- Nameplate and drawing match
07QUALITY ASSURANCE
Factory Testing & FAT
Routine, type and special testing supports product quality assurance, with applicable tests and FAT arrangements aligned to the adopted standard and project specification.
- Per-unit routine testing
- Calibration traceability
- FAT witness and report review
08DELIVERY CONTROL
Packing & Shipment Release
Packing, moisture protection, impact monitoring and release documents should match the logistics plan.
- Packing and protection
- Document completeness
- Shipment-release approval
Quality & Testing Assurance
Management systems, measurement capability and independent testing resources
YAWEI supports manufacturing quality through management systems, metrology, factory testing and third-party testing resources.
Quality Management
A quality-management framework supports control from product development and design through manufacturing and testing.
PROCESS QUALITYEnvironmental Management
Environmental management is integrated with YAWEI’s commitment to the green development of electrical equipment.
ENVIRONMENTAL SYSTEMOccupational Health & Safety
Occupational health and safety management supports responsible workshop operations and employee protection.
WORKPLACE SAFETYMeasurement & Calibration
CNAS-related certificate materials and enterprise metrology qualification support measurement traceability and test quality.
METROLOGY SUPPORTIndependent Testing Resources
Products have been tested through the National Transformer Quality Supervision and Inspection Center, CEPRI Wuhan and Suzhou Electrical Apparatus Research Institute.
THIRD-PARTY TESTINGProduct Quality Verification
Routine, type and special tests support manufacturing release, design validation and project-specific quality assurance.
ROUTINE · TYPE · SPECIALInternational standard capability
YAWEI manufactures transformers for projects referencing IEC, IEEE, ANSI, CSA and EN requirements, aligning design and testing with the adopted project standard.
Product certification resources
Certificate materials include UL, CE, TUV, KEMA, GOST and related product qualifications for applicable transformer categories and markets.
Quality Control Across Every Stage
Process controls create consistent manufacturing results
YAWEI links each major production stage with defined quality controls, production records and a clear customer benefit.
| Manufacturing stage | Key quality control | Quality record | Customer value |
|---|---|---|---|
| Incoming materials | Identity, grade, quantity, batch and acceptance status | Material certificates and incoming-inspection records | Consistent material quality and traceability |
| Core manufacturing | Cutting, burr, stacking, dimensions and clamping | Core process and in-process inspection records | Controlled no-load performance and mechanical consistency |
| Winding | Turns, tension, insulation and dimensions | Winding and dimensional inspection records | Stable ratio, impedance and mechanical performance |
| Tank fabrication | Welding, dimensions, sealing and coating | Welding, dimensional, leak-test and coating records | Reduced leakage, corrosion and structural risk |
| Final assembly | Connections, torque, clearances and accessories | Assembly inspection and hold-point records | Conformance with approved drawings and accessories |
| Factory testing | Standard test items and calibrated measurement | Routine-test reports, calibration and FAT records | Objective quality evidence before shipment |
Quality from process to performanceMaterial traceability, controlled manufacturing, calibrated testing and complete quality records work together to support reliable transformer performance and smooth project acceptance.
Manufacturing for project requirements
Discuss your transformer project with YAWEI
Share the target voltage, capacity, application, standard and delivery requirements so our team can align the manufacturing and quality plan with your project.