Tanaka Electric Tanaka Electric

Top Trusted ONAN Transformer Manufacturers & Suppliers

Global Industrial Whitepaper: Engineering Excellence, High-Efficiency Power Distribution Solutions, and Advanced Energy Infrastructure by Zhejiang Tanaka Electric Co., Ltd.

⚡ High-Performance Core Transformer & Monitoring Series

Explore our industry-leading high-voltage instrument transformers, current/voltage sensors, and energy-saving distribution systems engineered for global smart grids.

Epoxy Resin Outdoor Instrument Transformer Monitoring Sensor

Epoxy Resin Outdoor Instrument Transformer Monitoring Sensor Split Core Current Transformer

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Dgg 11kv 35kv CT/PT Indoor Single Phase Instrument Transformer

Dgg 11kv 35kv CT/PT Indoor Single Phase Instrument Current/Voltage/ Potential Transformer

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50Hz solid core current transformer for electricity meter

50Hz solid core current transformer for electricity meter

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800kVA 10kv Scb Electrical Power Distribution Dry Type Transformer

800kVA 10kv Scb Electrical Power Distribution Epoxy Resin Cast Dry Type Transformer

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Step Down Hv Dry Type Power Transformer

100kVA to 3000kVA Step Down Hv 20kv 15kv 10kv to 0.4kv 3 Phase Electrical Resin-Cast Dry Type Power Transformer with IP20 Enclosure

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Three Phase Pad Mounted Transformer

2000/3000/5000 kVA Three Phase Electrcial Step up and down Pad Mounted Transformer

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High Quality Single Phase Low Voltage Transformers

High Quality Single Phase 10kv to 0.4kv Low Voltage Transformers Competitive Prices

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Cnkeeya Jdzx10-10 10kv Indoor Voltage Transformer

Cnkeeya Jdzx10-10, 10kv Indoor Voltage Transformer Voltage Measuring Instrument PT 10√ 3/0.1√ 3/0.1/3 0.5/6p, 0.2/3p

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🌐 Global Industry Solutions & ONAN Transformer Roadmap

Comprehensive insights into Oil Natural Air Natural (ONAN) transformer systems, driving efficiency across industrial and commercial power grids worldwide.

110M+
RMB Registered Capital
18+
Core Patents & Innovations
120+
Advanced Production Sets
100+
Key Global Power Projects

🛡️ Superior Thermal & Cooling Architecture

ONAN (Oil Natural Air Natural) transformers rely on natural convection of mineral oil and ambient air cooling. Our advanced hermetically sealed designs prevent moisture ingress and oxidation, guaranteeing decades of reliable field operation in extreme outdoor environments.

⚙️ Precision Engineering & Smart Manufacturing

Equipped with CNC automatic winding machines, CNC static vacuum casting systems, and microcomputer-controlled gradient curing furnaces, we maintain absolute structural integrity and minimal core loss across all distribution lines.

🌍 Global Procurement & Compliance Standards

Adhering strictly to ISO9001, ISO14001, CE, and CCC international certifications, our products meet rigorous regional electrical grid codes across North America, Europe, Southeast Asia, and the Middle East.

🏭 About Zhejiang Tanaka Electric Co., Ltd.

A high-tech powerhouse specialized in research, development, production, and distribution of high-performance transformers and power equipment.

Zhejiang Tanaka Electric Co., Ltd. is a high-tech enterprise specializing in the production, research and development, and sales of transformers and related products. The company's registered capital amounts to 110 million RMB. It has a strong technical team with 15 senior engineers, over 30 intermediate technicians, and 17 senior technicians. The powerful technical strength provides a solid guarantee for the research and production of products. As of now, the company has obtained 18 patents, demonstrating its remarkable achievements in technological innovation.


In addition, to better meet the diverse needs of customers, the company can also assist in purchasing other products on behalf of customers, striving to provide customers with more comprehensive and convenient services. In recent years, the company has continuously increased investment in technical strength and modern equipment, currently operating over 120 sets of specialized equipment including CNC automatic winding machines, CNC static vacuum casting, automatic foil winding machines, and microcomputer-controlled gradient curing furnaces.

Tanaka Factory Equipment Transformer Production Line

Rigorous Quality Control & Zero-Defect Philosophy

We have formulated strict and perfect quality management standards. From raw material procurement and incoming inspection, production, finished product inspection and warehousing, finished product delivery to installation and other links, all implement strict monitoring processes. We ensure that each process passes layer by layer, eliminate the outflow of unqualified products, and incorporate the pursuit of "zero defects" into every detail.

The company always follows the business philosophy of "technology-oriented, service-first, integrity-based", adhere to taking customer interests as its own responsibility, pay attention to product R&D investment, and strictly operate in accordance with the ISO9001 quality management system standard. Pragmatic, innovative and progressive, we provide customers from all walks of life with high-quality products that meet the characteristics of each region and perfect solutions for transformers. Over the years, the group has undertaken hundreds of key power projects, casting one high-quality project after another with professionalism and ingenuity.

📋 Corporate Profile & Specifications

Key operational metrics and credentials of Zhejiang Tanaka Electric Co., Ltd.

Business Type: Manufacturer
Product Range: Transformers , Power Distribution Equipment
Products/Service: Power Transformer , Dry-type Transformer , Transformer Substation , Transfomer Accessories , Oil-immersed Transformers , Distribution Box
Total Employees: 201~500
Capital (Million US $): 110 million RMB
Year Established: 2005
Certificate: ISO9001 , ISO14001 , CE , CCC

🔌 Advanced Power Distribution & Special Transformers

Discover our complete portfolio of high-efficiency oil-immersed distribution transformers, rectifier units, and specialized dry-type solutions.

Efficient Sealed Oil Immersed Distribution Transformer

Efficient 10kVA-2500kVA/10kv Fully Sealed Oil Immersed Distribution Transformer for Power Supply

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Vertical Power Rectifier Transformer

Vertical Power Rectifier Transformer with Customizable Features 80~10000kVA

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Indoor PT Instrument Potential Transformer

Indoor PT Instrument Transformer 11/√ 3: 0.11/√ 3: 0.11/3kv, 0.2/3 (6) P, 0.5/3 (6) P, Potential Transformer

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Wqe 30A 50 Ohm PCB Mounting Current Transformer

Wqe 30A 50 Ohm PCB Mounting Current Transformer

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10kv Dry Type Transformer 400kVA High Efficiency

10kv Dry Type Transformer 400kVA Copper Winding High Efficiency Low Loss

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100kv 200kv 250kVA Power Transformer Oil Immersed

On Sale 100kv 200kv 250kVA Power Transformer 10kv Oil Immersed Distribution Transformer Energy-Saving Transformerthree Phase 400V Output Voltage 50kVA Rated 6kv

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High Voltage Customizable Transformer Epoxy Resin

6kv-35kv Customizable High Voltage Power Distribution Dry Type Transformer Epoxy Cast Resin Amorphous Alloy Resin Insulated

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High Accuracy IP67 Waterproof Split Core Current Measurement Transformer

High Accuracy IP67 Outdoor Waterproof Split Core Current Measurement Transformer

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❓ Frequently Asked Questions (FAQ)

Expert answers regarding ONAN transformers, manufacturing standards, and global procurement.

Q1: What makes ONAN transformers the preferred choice for industrial power distribution?
ONAN (Oil Natural Air Natural) transformers utilize natural thermal convection for cooling, requiring no active mechanical pumps or fans. This results in high reliability, lower maintenance costs, and exceptional durability in continuous outdoor industrial operations.
Q2: What international quality certifications do Zhejiang Tanaka Electric products hold?
Our manufacturing processes and quality management systems are fully certified under ISO9001 and ISO14001 standards. Furthermore, our product lines comply with CE and CCC regulations, ensuring seamless deployment in global markets.
Q3: Can Zhejiang Tanaka Electric customize transformers for specific regional grid requirements?
Yes. Backed by 15 senior engineers and 17 senior technicians, we offer highly customizable solutions for voltage ratings, capacity (ranging from kVA to 10,000kVA), enclosure protection classes (such as IP20 or IP67), and special core materials like amorphous alloy.