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Wenzhou Huajidian Technology Co. Ltd.
Wenzhou Huajidian Technology Co. Ltd.
Products

Buy Power Transformers for Reliable Industrial Energy Solutions

Huajidian is a leading supplier of high-quality medium- and high-voltage power distribution equipment, specializing in oil-immersed and dry-type Power Transformers with voltage coverage from 6 kV to 330 kV. Designed to meet stringent global grid standards, our equipment offers high efficiency, safety, stability, and strong adaptability. Manufactured by qualified and certified factories, Huajidian transformers are widely deployed by power companies, industrial parks, and large-scale energy projects across Southeast Asia, the Middle East, Africa, and North America.

Our complete product line combines international certification compliance, comprehensive quality control, and localized after-sales service, delivering low-loss, stable power conversion solutions for grid upgrades, industrial power distribution, and power plant transmission projects.

Key Highlights

  • Wide Voltage Coverage: Supports voltages from 6 kV to 330 kV, meeting diverse industrial and grid applications.
  • Energy Efficiency: Significantly reduces no-load and load losses, helping customers lower long-term operational costs.
  • Strong Compliance: Meets IEC 60076, IEC 62271, CE, IECEx, ATEX, and regional standards such as Saudi Arabia’s SABER and Indonesia’s SNI.
  • Durability: Designed for a service life exceeding 30 years, capable of stable operation under high temperature, humidity, and dust storm environments.

Real-World Application Case

110 kV Power Grid Upgrade – Industrial Park, Vietnam (2024)

Challenges:

  • High concentration of industrial enterprises requiring stable power supply
  • Strict noise and emission regulations
  • Severe voltage fluctuations requiring strong regulation capability

Solution:

  • Four 110 kV dry-type Power Transformers customized for high-temperature and low-noise operation
  • One-stop service including technical configuration, certification processing, factory testing, and installation guidance

Results:

  • 99.9% operational stability in the first year
  • 22% reduction in overall energy consumption
  • Successful pass of Vietnam EVN certification

Quality Control and Certification

Huajidian implements a strict three-tier quality control system:

  1. Incoming Quality Control (IQC): Inspection of silicon steel, copper windings, and insulation materials to ensure compliance with international standards.
  2. In-Process Quality Control (IPQC): Monitoring of winding, core assembly, and vacuum impregnation processes to prevent manufacturing defects.
  3. Factory Acceptance Testing (FAT): Full performance testing including transformer ratio, impedance, no-load loss, and insulation resistance.

Certifications: IEC 60076 type test report, CE, IECEx, ATEX, ISO 9001/14001, with support for SABER (Saudi Arabia) and SNI (Indonesia).

Frequently Asked Questions

Q1: Differences between oil-immersed and dry-type transformers?

A: Oil-immersed transformers use insulating oil for cooling and insulation, offering lower cost, larger capacity, and strong heat dissipation, suitable for outdoor and heavy-load applications. Dry-type transformers use epoxy resin insulation, providing fire resistance, low noise, and compact structure, suitable for indoor and high-safety environments.

Q2: Warranty and after-sales support?

A: Standard two-year warranty is provided, with optional extensions for large projects. Global spare parts inventory and 24/7 technical support are available, including remote troubleshooting and on-site service when needed.

Q3: Can transformers be customized?

A: Yes. Voltage levels, capacity, cooling methods, and protection configurations can all be customized. Special environments such as high temperature, humidity, and coastal corrosion conditions are also supported, along with local certification requirements.

Why Choose Huajidian?

  • Professional Expertise: Deep experience in medium and high voltage power distribution systems and global standards.
  • Stable Quality: Long-term partnerships with leading manufacturers in Wenzhou ensure consistent quality.
  • Global Experience: Over 500 transformers delivered to 20+ countries with proven project success.
  • Integrated Service: One-stop support from selection and configuration to logistics, certification, and after-sales.

Huajidian is committed to delivering high-quality Chinese power equipment worldwide, making us a reliable partner for power transformers and complete distribution solutions.

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34.5 kV 10000 kVA Power Transformer

34.5 kV 10000 kVA Power Transformer

Power System 10000kVA, 34.5kV/6.6kV, 50Hz/60Hz

Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670

The Huajidian 34.5 kV 10000 kVA power transformer is a high-performance core power device specifically developed for high-intensity, high-impact, and high-harmonic industrial power applications. The product strictly adheres to IEC and national industry standards, and through optimized magnetic circuit design, a fully sealed anti-aging structure, and efficient heat dissipation technology, it boasts advantages such as low loss, strong overload capacity, excellent short-circuit resistance, low noise, and long lifespan. As a professional manufacturer of high-voltage power equipment in China, Huajidian possesses a complete production and testing system and extensive experience in overseas delivery and customized services. This transformer is widely applicable to industrial smelting, substation power distribution, chemical production, port and airport power capacity expansion, and other scenarios. Verified by numerous actual engineering projects, it can provide reliable power supply for the continuous and stable production of enterprises of all sizes.
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33kV 11kV 20mVA Power Transformer

33kV 11kV 20mVA Power Transformer

Power System 20MVA, 33kV/11kV, 50Hz/60Hz

Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670

Huajidian's 33kV 11kV 20mVA power transformer is a high-voltage, high-capacity oil-immersed power transmission and distribution equipment independently developed and manufactured by a professional domestic factory. The product adopts the mature Dyn11/YNd11 wiring method and dual heat dissipation mode, possessing advantages such as low loss, strong overload capacity, and stable operation. It strictly adheres to domestic and international power industry standards and supports parameter customization. As a high-quality power transmission and distribution equipment supplier, Huajidian primarily uses this equipment in regional substations, stepping down 33kV high-voltage power to 11kV, providing stable power supply for urban power grids, industrial parks, and new energy distribution projects. This article concisely introduces its core parameters, structural characteristics, practical application cases, and common selection issues, providing a reference for substation engineering procurement and technology selection.
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Three Phase Power Transformer

Three Phase Power Transformer

Power System Three Phase, 50Hz/60Hz

Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670

The Huajidian three phase power transformer is a core electrical device in modern power grids and industrial power supply systems. Utilizing the principle of electromagnetic induction, it achieves efficient voltage and current conversion between circuits of the same frequency. This product is independently developed and manufactured by a professional factory in China. It features a compact structure, lower cost, stable performance, and strong adaptability, supporting both delta and star winding connection methods to meet diverse power distribution scenarios. Widely used in power transmission, new energy grid connection, industrial manufacturing, and urban power distribution, it effectively reduces transmission losses and ensures a continuous and stable power supply, making it a core and reliable device for medium- and high-power power systems.
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Auto Power Transformer

Auto Power Transformer

Power System 50Hz/60Hz, Three Phase

Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670

As a professional electrical equipment manufacturer in China, Huajidian independently develops and produces a full range of high-quality auto power transformers, including single-phase, three-phase, and toroidal models. This product utilizes a shared winding structure, unlike traditional isolation transformers, allowing for power transmission via both magnetoelectric and electromagnetic methods. It boasts advantages such as high efficiency, energy saving, compact size, and stable operation, meeting domestic and international safety and energy efficiency standards. The product is widely used in industrial automation, commercial buildings, precision electronics, and power transmission and distribution. Leveraging its standardized factory production system, Huajidian, as a reliable industry supplier, can provide standardized and customized transformer solutions for customers in various industries.
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ZS Rectifier Transformer For Intermediate Frequency Furnace

ZS Rectifier Transformer For Intermediate Frequency Furnace

Power System 50Hz/60Hz, Three Phase

Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670

Huajidian is a professional electrical equipment manufacturer in China. Its ZS Rectifier transformer for intermediate frequency furnaces is manufactured in strict accordance with International Electrotechnical Commission (IEC) and domestic standards. Featuring an advanced iron core and vibration-damping and noise-reducing structure, the product boasts advantages such as low noise, high energy efficiency, overload resistance, short-circuit tolerance, excellent heat dissipation, and long lifespan. It is a core power supply device connecting the power grid and smelting equipment. Our factory offers full-parameter customization services, providing environmentally friendly, stable, and cost-effective power supply solutions for customers in various industries as a trusted supplier.
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Step Up Power Transformer

Step Up Power Transformer

Power System 50Hz/60Hz, Three Phase

Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670

In long-distance, high-capacity power transmission, the low-voltage output of generator sets easily leads to problems such as high line heat loss and high infrastructure costs. As a professional power transmission and transformation equipment manufacturer in China, Huajidian's independently developed and manufactured step up power transformer utilizes the principle of electromagnetic induction to upgrade the low-voltage electricity from generator sets to the high-voltage transmission standard voltage, effectively reducing line current and transmission losses, and saving power grid construction costs. Based on mature factory manufacturing processes and numerous engineering projects, we, as a reliable supplier, can provide stable and high-quality solutions for power transmission projects worldwide.
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HUAJIDIAN TEC is a professional Power Transformer manufacturer and supplier in China. We have an experienced sales team, professional technicians, and an after-sales service team.
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