Wholesale Transformers for Efficient Power Distribution

Huajidian, a professional power equipment supplier located in Wenzhou, China, specializes in high-performance oil-immersed and dry-type power transformers, covering voltages from 6 kV to 330 kV. Serving global power companies, EPC contractors, and various industrial clients, Huajidian's partner manufacturers possess comprehensive qualifications, and its products have obtained multiple international certifications, including IEC 60076, CE, and explosion-proof certifications. Leveraging a rigorous quality control system, Huajidian provides safe, stable, efficient, and durable power distribution equipment for power grid upgrades, industrial parks, and large-scale power plant projects in Southeast Asia, the Middle East, Africa, and North America, possessing extensive experience in overseas project implementation.

Huajidian's entire transformer series is designed and tested strictly according to IEC 60076 and IEC 62271 international standards, and manufactured in partner factories in the Yueqing industrial zone of Wenzhou. All products undergo a three-stage quality control process: incoming material inspection, in-process inspection, and outgoing testing, fully complying with international quality standards.

1. Oil-Immersed Power Transformer

• Voltage Rating: 6kV~330kV
• Capacity Range: 50 kVA~100 MVA
• Core Advantages: Fully sealed oil-cooled structure, strong overload capacity, low operating noise (below 55 dB), normal service life up to 25-30 years
• Applicable Scenarios: Outdoor substations, rural power grid renovation, large-scale power transmission and distribution projects such as thermal/photovoltaic/wind power stations

2. Dry-Type Power Transformer

• Voltage Rating: 6kV~35kV
• Capacity Range: 50 kVA~2500 kVA
• Core Advantages: Epoxy resin casting molding, using F/H grade insulation material, possessing fireproof and explosion-proof characteristics, basically maintenance-free in the later stage
• Applicable Scenarios: Indoor power distribution rooms, data centers, hospitals, commercial buildings, industrial plants, and other indoor locations

Core Advantages

1. Authoritative Certifications

Products fully comply with IEC 60076 Design and type testing, CE, IECEx, and ATEX explosion-proof certifications. We also assist clients with market access certifications in various countries such as Saudi Arabia (SABER) and Indonesia (SNI) to meet the regulatory requirements of different regions.

2. Full-Process Quality Control

Incoming Quality Control (IQC): Strict screening of raw materials such as silicon steel sheets, copper windings, and insulating oil.

In-Process Quality Control (IPQC): Real-time monitoring of key production stages such as coil winding, core assembly, and vacuum drying.

Factory Testing (FAT): Completion of a full set of tests including temperature rise, insulation strength, and short-circuit withstand capability before shipment.

3. Professional Technical Services

Our entire foreign trade team has received electrical professional training, enabling us to accurately interpret customer needs and provide integrated power distribution solutions including product selection, technical configuration, and logistics and customs clearance.

Practical Application Case

Case Study: 110kV Oil-Immersed Transformer for a Photovoltaic Power Plant in Vietnam (2024)

Project Background: 50 MW Photovoltaic Power Plant Project in Binh Thuan Province

Supporting Products: 110kV/35kV, 50 MVA Oil-Immersed Transformer

Operational Performance: The equipment operated continuously for over 18,000 hours in the local high-temperature and high-humidity environment, with an availability rate of 99.9% and no faults throughout the entire process.

Project Value: Stable power output from the power plant, reducing overall operation and maintenance costs by 30%.

Frequently Asked Questions

Q1: What are the main differences between oil-immersed transformers and dry-type transformers?

A: Oil-immersed transformers rely on insulating oil for cooling and insulation. They have large capacity, good heat dissipation, and high cost-effectiveness, and are mostly used outdoors and in high-power transmission and distribution scenarios. Dry-type transformers use air cooling and epoxy resin casting technology, are fireproof and explosion-proof, maintenance-free, and are more suitable for indoor use and locations with high safety requirements.

Q2: What certifications does Huajidian transformer have?

A: Our products hold international certifications such as IEC 60076, CE, IECEx, and ATEX. We can also assist customers with mandatory regional market access certifications such as Saudi Arabia's SABER and Indonesia's SNI to meet the compliance requirements of various countries' markets.

Q3: What warranty and after-sales services are provided?

A: All Huajidian transformers come with a 2-year warranty. We maintain a large inventory of spare parts for core models and provide 24/7 technical support. We have service outlets in Southeast Asia and the Middle East, and on-site issues can be responded to and resolved within 48 hours.