Dada Transformer
Transformer Factory
DADA ELECTRIC

Engineered Transformers, Built for Reliability.

Founded in 2007, DADA ELECTRIC is a technology-driven manufacturer specializing in the engineering, manufacturing, and global supply of medium- and low-voltage power distribution equipment, with a strong focus on transformer solutions. Headquartered in Weihui Henan, China, our integrated manufacturing campus supports end-to-end production with a fully established engineering and quality control system.

DADA Electric is a National High-Tech Enterprise and an Executive Council Member of the Henan Transformer (High-Voltage Apparatus) Industry Association and is a qualified certified supplier to the State Grid Corporation of China.

Manufacturing Capabilities
DADA ELECTRIC focuses on the engineering and scalable manufacturing of power equipment up to 35 kV. Our portfolio covers 9 major product series and nearly 150 models, supported by an annual production capacity of 4,000,000 kVA.

Key product lines include:
• Oil-Immersed Power Transformers
• Dry-Type Transformers (Epoxy Resin Cast)
• Renewable Energy Transformers for solar and wind applications
• Compact Substations (European, American, Chinese, and underground designs)
• Special-Purpose Transformers (Rectifier, Furnace, etc.)
• High- and Low-Voltage Switchgear Systems
 
Inspirations & Case
Why Choose DADA Transformer
Discipline Defines Quality. Process Ensures Delivery.
We hold 26 national patents and multiple provincial-level technology certifications. Continuous investment in product design, material optimization, and manufacturing processes ensures consistent performance in efficiency, reliability, and service life.
INNOVATION
Customized Production
Tailored Solutions
Training Center
Further Products
10-15kV Oil-Immersed Distribution Transformer
 
The 10–15kV oil-immersed distribution transformer is a three-phase, outdoor/indoor distribution unit that uses transformer oil as its insulating and cooling medium to step down 10/11/13.8/15kV high voltage to 0.4kV low voltage. 
 
It is designed for power distribution across urban and rural grids, industrial enterprises, commercial complexes, and residential developments.
 
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30kV–33kV–35kV Oil-Immersed On-Load Tap-Changing Power Transformer
 
This series comprises three-phase, oil-immersed on-load tap-changing power transformers at the 30kV, 33kV, and 35kV levels, using transformer oil as the insulating and cooling medium and suited to 50/60Hz AC power systems. 
 
It automatically regulates voltage without interrupting supply, delivering a stable output voltage. The high-voltage side covers 30/33/35kV, while the low-voltage side can output common voltage levels such as 6.3kV, 10kV, 11kV, 13.8kV, or 15kV. 
 
Built with premium magnetic materials and pure-copper windings, it offers low operating losses, strong overload capacity, and excellent voltage stabilization, making it ideal for operating conditions with significant grid-voltage fluctuation. It is widely used in regional substations, new-energy power stations, large industrial and mining enterprises, and metallurgical and chemical plants.
 
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30kV–33kV–35kV Epoxy Resin Dry-Type Distribution Transformer
 
This series comprises high-voltage epoxy resin cast dry-type distribution transformers at the 30kV, 33kV, and 35kV levels. Oil-free and pollution-free, cooled by air convection and forced air, and suited to 50/60Hz high-voltage power systems, it steps down high voltage for power distribution. 
 
The windings are integrally cast in epoxy resin under vacuum, giving the unit fire resistance and flame retardancy, explosion-proof and moisture-proof performance, high insulation strength, and safe, reliable operation—leak-free and simple to operate and maintain. It is suited to high-voltage indoor distribution, urban core grids, and key fire-protection zones. 
 
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30kV–33kV–35kV Oil-Immersed Distribution Transformer
 
This product is a three-phase oil-immersed distribution transformer at the 30kV, 33kV, and 35kV levels, using transformer oil as the insulating and cooling medium, suited to AC 50/60Hz power systems, and able to step down high-voltage grid power to a 0.4kV utilization voltage. 
 
Available in an off-circuit tap-changing version and built with premium silicon steel and pure-copper windings, it offers low losses, stable operation, corrosion resistance and weatherproofing, and strong load-bearing capacity. Suited to both outdoor and indoor substations, it is widely used in industrial and mining enterprises, grid hubs, new-energy power stations, mining infrastructure, and similar applications. 
 
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10–15kV Amorphous Alloy Oil-Immersed Distribution Transformer
 
The 10–15kV amorphous alloy oil-immersed distribution transformer is a new-generation energy-saving distribution unit that replaces the conventional silicon-steel core with an amorphous alloy core, using mineral transformer oil as its insulating and cooling medium to step down 10/11/13.8/15kV high voltage to 0.4kV low voltage. 
 
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10–15kV Open-Type Dry-Type Distribution Transformer
 
The 10–15kV open-type dry-type distribution transformer is a dry-type substation unit with an open, enclosure-free structure, cooled by two methods—natural air and forced air. Simple, lightweight, and economical to produce, it offers good heat dissipation, intuitive and convenient inspection, and stable, durable operation. 
 
It is widely used in indoor distribution settings with good ventilation and no stringent fire-protection or enclosure requirements, such as factory workshops, industrial and mining sites, and equipment-room distribution areas.
 
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European-Style Pad-Mounted Substation (High-Voltage/Low-Voltage Prefabricated Substation)
 
The European-style pad-mounted substation (high-voltage/low-voltage prefabricated substation) organically combines a high-voltage incoming unit, a transformer step-down unit, a low-voltage distribution unit, and the corresponding protection, metering, compensation, and measurement-control devices, prefabricated within a single fully enclosed metal enclosure that is moisture-proof, rust-proof, dust-proof, rodent-proof, fireproof, theft-proof, and heat-insulated, and that can be transported and installed as a complete unit. 
 
It receives grid power through the high-voltage switchgear, steps it down via the transformer, and distributes it to end users through the low-voltage switchgear, thereby achieving the reception, conversion, and distribution of electrical power.
 
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American-Style Pad-Mounted Substation
 
The American-style pad-mounted substation (also known as a compact-type transformer) is a compact outdoor distribution unit that highly integrates high-voltage switchgear, a distribution transformer, low-voltage switchgear, and protection devices within a single, fully sealed oil tank. 
 
With a mainstream voltage rating of 10kV/0.4kV and oil-immersed insulation and cooling, it offers a small size, minimal footprint, fast installation, low cost, and fully sealed, maintenance-free operation, and can be installed directly at ground level or on a pole. 
 
It is widely used in rural power supply, street lighting, residential developments, industrial parks, temporary construction power, and similar applications.
 
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Latest News

Which Transformer Should Be Used in a Solar Power Plant?

This article focuses on transformer selection for solar power plants. Building on a previous general comparison of oil-immersed and dry-type transformers, it examines the specific requirements of photovoltaic applications. The article outlines product solutions for different scenarios—large ground-mounted plants, commercial rooftops, and building-integrated photovoltaics—covering oil-immersed transformers, dry-type transformers, specialized box-type transformers for renewable energy, box-type substations, and high/low voltage switchgear. It then analyzes key technical factors unique to solar projects, including harmonic mitigation, voltage fluctuation and bidirectional power flow, insulation coordination, outdoor environmental endurance, and total cost of ownership over a 20-plus-year operating cycle. Drawing on Dada Electric's manufacturing experience, this guide offers project developers and engineers a practical, application-focused selection reference.

Jun 04, 2026

Oil-Immersed Transformer vs Dry-Type Transformer: How to Choose for Your Engineering Project?

Choosing the right transformer is a critical techno-economic decision for any power project. This article provides a detailed comparison between oil-immersed and dry-type transformers, focusing on safety, installation environment, maintenance, reliability, and total life-cycle cost. By walking through four key questions—installation location, fire safety level, available maintenance resources, and full cost of ownership—project decision-makers can confidently select the optimal technology. With complete manufacturing lines for both transformer types, Dada Electric offers unbiased, application-driven guidance to help you match equipment to real-world conditions, never pushing a product that does not fit.

May 20, 2026

Which Transformer Should Be Used in a Solar Power Plant?

This article focuses on transformer selection for solar power plants. Building on a previous general comparison of oil-immersed and dry-type transformers, it examines the specific requirements of photovoltaic applications. The article outlines product solutions for different scenarios—large ground-mounted plants, commercial rooftops, and building-integrated photovoltaics—covering oil-immersed transformers, dry-type transformers, specialized box-type transformers for renewable energy, box-type substations, and high/low voltage switchgear. It then analyzes key technical factors unique to solar projects, including harmonic mitigation, voltage fluctuation and bidirectional power flow, insulation coordination, outdoor environmental endurance, and total cost of ownership over a 20-plus-year operating cycle. Drawing on Dada Electric's manufacturing experience, this guide offers project developers and engineers a practical, application-focused selection reference.

Jun 04, 2026

Oil-Immersed Transformer vs Dry-Type Transformer: How to Choose for Your Engineering Project?

Choosing the right transformer is a critical techno-economic decision for any power project. This article provides a detailed comparison between oil-immersed and dry-type transformers, focusing on safety, installation environment, maintenance, reliability, and total life-cycle cost. By walking through four key questions—installation location, fire safety level, available maintenance resources, and full cost of ownership—project decision-makers can confidently select the optimal technology. With complete manufacturing lines for both transformer types, Dada Electric offers unbiased, application-driven guidance to help you match equipment to real-world conditions, never pushing a product that does not fit.

May 20, 2026

Strength Builds Trust | African Clients Visit DADA, Transformer Order Confirmed On-Site

From 10–12 September 2025, Lanyao Energy will exhibit its latest lightweight flexible modules and 50 kWh storage cabinet at Booth 7B15, Hall 7, CIOE Shenzhen. Technical talks and project matching will be open to all visitors.

Jul 20, 2025
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