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ISO 9001 & CE Certified Manufacturer
Professional Transformers & Voltage Solutions
High-performance power systems designed for industrial, utility, and renewable energy applications worldwide.
IEC / ANSI / IEEE
Compliant
OEM / ODM
Custom Design
Global Export
Stable Quality
Core Product Categories
Comprehensive power solutions for industrial, utility, and renewable energy applications worldwide
Expertise Solution
Voltage Regulator
High-precision automatic voltage regulation solutions designed to protect sensitive industrial equipment from voltage fluctuations and ensure a stable power supply.
View ProductsFeatured Products
Voltage Regulator
SBW-N-300KVA
High-capacity industrial voltage regulator for heavy-duty facilities.
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Voltage Regulator
SBW-N-50KVA
Precision stabilization for medium-scale manufacturing operations.
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Transformer
TNS-Z-30 KVA
Reliable power transformation with high efficiency and durability.
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Transformer
TND-Z-30 KVA
Compact design suitable for various commercial power requirements.
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Stabilizer
SVSG-10KVA
Advanced stabilization technology for sensitive electronic systems.
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Power Solutions for Different Applications
Tailored solutions for industrial, renewable energy, and commercial power needs across Africa, Russia, and global markets
Industrial Power Distribution
High-efficiency units for heavy-duty industrial environments, ensuring reliable energy flow.
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Single to Three Phase Conversion
Advanced converters to power 3-phase machinery from single-phase utility lines.
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Voltage Stabilization Solution
Precision regulators protecting sensitive equipment from power fluctuations.
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Customized Transformer Solution
Tailor-made designs for specific voltage requirements and industrial demands.
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OEM / ODM Power Solution
Manufacturing partnership offering white-label power products for your brand.
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Wenzhou, China
Pioneering Intelligent Energy Since 2019
Established in 2019 in the electrical hub of Liushi, Zhejiang Wenfei Electrical Equipment Manufacturing Co., Ltd. has rapidly emerged as a professional powerhouse in the R&D and production of premium power supply products.
With a 10,000 m² modern production base and a dedicated team of over 120 experts, we integrate independent design, core manufacturing, and rigorous testing to ensure every transformer and stabilizer meets the highest global standards.
Factory Capabilities
State-of-the-art manufacturing facilities with comprehensive production and testing capabilities
01/06
Precision Production Process
From raw material inspection to final packaging, our 8-stage manufacturing process ensures every voltage regulator and transformer meets the highest quality standards.
01
Raw Material Procurement & Inspection
Procurement of silicon steel sheets, copper enameled wire, insulation materials, shell steel, and electronic components. Sample testing ensures all materials meet production standards for specifications and performance.
02
Core Processing
Silicon steel sheets are cut to specified dimensions and assembled into cores through stacking, riveting, or welding. Lamination factor is controlled to minimize hysteresis loss.
03
Winding Coil Manufacturing
Primary and secondary windings are wound on winding machines using copper enameled wire according to product parameters. Turn count and tension are precisely controlled, followed by insulation wrapping.
04
Core & Winding Assembly
Wound coils are assembled onto the core to complete the main body. Insulation pads are installed to ensure proper insulation clearance between windings and core, and between windings themselves.
05
Varnish Impregnation & Drying
Assembled units undergo vacuum varnish impregnation to ensure insulation varnish fully penetrates winding gaps. Units are then dried and cured in ovens to enhance insulation performance and mechanical strength.
06
Shell Assembly & Wiring
Dried units are installed into shells. Terminals, cooling fans, and protection devices (overload protectors, temperature controllers) are mounted, and internal wiring is completed.
07
Testing & Commissioning
No-load tests, load tests, withstand voltage tests, and insulation resistance tests verify that voltage regulation rate, loss, temperature rise, and other indicators meet design requirements.
08
Packaging & Warehousing
Qualified products are cleaned and labeled. Moisture-proof and shock-proof packaging is applied before warehousing for shipment, ensuring products arrive in perfect condition.
Why Choose Wenfei Electrical
Over 5 years of excellence in power equipment manufacturing with global reach and certified quality
Modern Production Base
10,000 m² facility with advanced manufacturing equipment and comprehensive testing capabilities.
Professional Team
120+ experienced employees including R&D engineers and technical support staff.
Certified Quality
ISO 9001 and EU CE certified with strict quality control processes.
Global Reach
Products exported to 40+ countries with reliable after-sales support.
ISO 9001
Quality Management
EU CE
European Compliance
IEC Standards
International Compliance
Export License
Global Trade Certified
Technical FAQ
Common questions about our products and technical support
What is the difference between dry-type and oil-immersed transformers?
Dry-type transformers use air or solid insulation materials (epoxy resin), making them environmentally friendly, fire-resistant, and maintenance-free. They are ideal for indoor installations like hospitals, data centers, and high-rise buildings.
Oil-immersed transformers use mineral oil for insulation and cooling, offering higher capacity and better heat dissipation. They are suitable for outdoor substations and industrial applications requiring large power distribution.
How do I choose the right voltage stabilizer for my application?
Consider these factors:
- Load Capacity: Calculate total connected load and add 20-30% safety margin
- Input Voltage Range: Measure your grid's voltage fluctuation range (typically ±15% to ±30%)
- Accuracy Requirements: Precision equipment needs ±1% regulation; general use accepts ±3%
- Response Time: Sensitive electronics require fast response (<0.02s)
- Phase Configuration: Single-phase for residential; three-phase for industrial
Our technical team provides free load analysis and customized recommendations.
What warranty and after-sales support do you provide?
Comprehensive Support Package:
- Standard Warranty: 24 months from delivery date covering manufacturing defects
- Extended Warranty: Optional 36-60 months for critical applications
- Technical Hotline: 24/7 multilingual support team
- On-Site Service: Installation guidance and commissioning support
- Spare Parts: Fast delivery within 48 hours for common components
- Training: Free operator training and maintenance manuals
- Remote Diagnostics: IoT-enabled products support remote monitoring
We maintain service centers in Southeast Asia, Middle East, and Africa for faster response.
Can you customize products for special requirements?
Yes, our in-house R&D team specializes in custom solutions. We can modify:
- Voltage levels and taps configuration
- Physical dimensions and mounting options
- Environmental protection ratings (IP class, altitude, temperature)
- Special features (remote monitoring, harmonic filtering, seismic resistance)
- Compliance with local standards (UL, CSA, AS/NZS, etc.)
Typical customization lead time: 4-8 weeks. Contact us with your specifications for a detailed proposal.
What are the maintenance requirements for your transformers?
Dry-Type Transformers:
- Minimal maintenance required
- Annual visual inspection and cleaning
- Check connections and terminal tightness
- No oil sampling or filtration needed
Oil-Immersed Transformers:
- Oil level and quality testing every 6 months
- Dissolved gas analysis (DGA) annually
- Bushing and gasket inspection
- Oil filtration or replacement as per test results
We provide detailed maintenance schedules and can offer preventive maintenance contracts.
Latest News & Insights
Industry updates and technical knowledge
Ready to Power Your
Next Project?
Get in touch with our technical team to discuss your power solution requirements. We provide customized quotations and global engineering support.
Email Support
sales@weifei-electric.comDirect Line
+86 18070249969Global Headquarters
Liushi Town, Wenzhou, Zhejiang, China