Vietnamese Customers Visit GNEE ELECTRIC To Discuss Customization Of 400 KVA Oil-Immersed Transformers
Mar 23, 2026
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A delegation of Vietnamese clients recently visited GNEE Electric to explore cooperation opportunities and discuss the customization of 400 kVA oil-immersed transformers for their upcoming distribution and industrial power projects.
As a professional transformer manufacturer with extensive export experience, GNEE ELECTRIC continues to strengthen its presence in Southeast Asia by delivering efficient, reliable, and project-specific power solutions.
Within the first stage of the visit, GNEE ELECTRIC introduced its manufacturing capabilities, engineering expertise, and quality assurance system-reinforcing our role not just as a supplier, but as a long-term technical partner for global clients.
Vietnamese Customers Visit GNEE ELECTRIC Factory for 400 kVA Oil-Immersed Transformer Inspection
The visit began with a guided factory tour, where Vietnamese customers gained a firsthand understanding of how 400 kVA oil-immersed transformers are produced from raw materials to finished products.
They observed key production processes, including:
- Silicon steel core cutting and stacking
- High-precision copper winding
- Vacuum drying and oil filling
- Final assembly and testing
The clients showed strong interest in GNEE ELECTRIC's automated production lines and strict testing procedures, which ensure consistent product quality and performance.
Transformer workshop
In addition, the delegation visited the testing laboratory, where engineers demonstrated routine and type tests, ensuring that every transformer meets IEC standards before shipment.
In-Depth Meeting on 400 kVA Oil-Immersed Transformer Customization
Following the factory tour, both sides held a detailed technical meeting focusing on the customization of 400 kVA oil-immersed transformers for Vietnam's specific application scenarios.
Key Concerns Raised by Vietnamese Customers
During the discussion, the Vietnamese clients shared several practical challenges they are currently facing:
- Voltage instability in local distribution networks
- High ambient temperature and humidity, affecting insulation performance
- Frequent load fluctuations in industrial zones
- Limited installation space in urban projects
- High maintenance costs of existing transformers
These pain points are common in rapidly developing regions, where power demand is increasing but infrastructure conditions remain complex.
GNEE ELECTRIC's Tailored Solutions for 400 kVA Oil-Immersed Transformers
In response to the client's concerns, GNEE ELECTRIC's engineering team proposed a series of targeted solutions to optimize the performance of 400 kVA oil-immersed transformers.
Solution 1: Enhanced Stability for Voltage Fluctuations
To address unstable grid conditions, we recommended:
- Optimized winding design to improve voltage regulation
- Higher-quality core materials to reduce losses and improve efficiency
- Customized impedance values for better load adaptability
Solution 2: High-Performance Insulation for Tropical Climates
For Vietnam's hot and humid environment, GNEE ELECTRIC proposed:
- Upgraded insulation systems with moisture-resistant materials
- Vacuum oil filling technology to eliminate internal moisture
- Fully sealed tank design to prevent contamination
These improvements significantly extend the service life of the 400 kVA oil-immersed transformer.
Solution 3: Flexible Design for Space Constraints
To meet installation limitations in urban areas, we offered:
- Compact transformer structure design
- Optional integrated solutions (transformer + enclosure)
- Flexible layout options for indoor or outdoor installation
Compact oil-immersed transformer design
Solution 4: Reduced Maintenance and Lifecycle Costs
GNEE ELECTRIC also focused on lowering long-term operational costs by:
- Using high-grade insulating oil with longer service intervals
- Designing for lower temperature rise
- Providing optional monitoring systems for real-time diagnostics
These features help clients reduce downtime and maintenance expenses.
Application of 400 kVA Oil-Immersed Transformers in Vietnam
The customized 400 kVA oil-immersed transformers discussed during the visit are widely used in:
Industrial Parks and Manufacturing Zones
Providing stable and efficient power for factories and processing plants.
Commercial Buildings and Urban Infrastructure
Supporting reliable electricity supply in densely populated areas.
Renewable Energy Integration
Used in solar and small-scale energy systems for efficient power distribution.
Technical Specifications of 400 kVA Oil-Immersed Transformer
| Parameter | Specification |
|---|---|
| Rated Capacity | 400 kVA |
| Primary Voltage | 10kV / 11kV / Customized |
| Secondary Voltage | 0.4kV / 0.415kV |
| Frequency | 50Hz / 60Hz |
| Phase | Three Phase |
| Cooling Method | ONAN |
| Vector Group | Dyn11 / Yyn0 |
| Impedance Voltage | 4% – 6% |
| Insulation Level | IEC Standard |
| Temperature Rise | ≤ 65K |
| Tank Type | Hermetically Sealed |
| Oil Type | Mineral Oil / Optional Alternatives |
| Protection Class | IP00 / IP23 |
Conclusion: Strengthening Cooperation Through 400 kVA Oil-Immersed Transformer Customization
The visit of Vietnamese customers marks another important step in GNEE ELECTRIC's expansion into the Southeast Asian market. Through open communication and technical collaboration, both sides reached a clear direction for the customization of 400 kVA oil-immersed transformers, tailored to real project needs.
If you are facing similar challenges in your power distribution system, GNEE ELECTRIC is ready to provide professional solutions backed by manufacturing expertise and global project experience.
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