China High-Efficiency Oil Immersed Transformer Supplier

GUANGBIAN manufactures Oil Immersed Transformer solutions with capacities from 10KVA to 5000KVA.

High Voltage: 1kV to 72.5kV

Low Voltage: ≤1kV

We support customized designs based on different voltage levels, capacities, and application requirements. Step-up transformer configurations are also available for power transmission and industrial projects.

What Exactly is an Oil Immersed Transformer?

So we've got the specs down. Now - what are these Oil Immersed Transformers? The basic idea: the iron core and windings sit in insulating oil. That oil takes care of two things - it keeps the electrical parts insulated and safe, and it pulls heat away from the components during operation. Take away that cooling system, and the transformer just can't handle normal working loads.

Guangbian oil immersed transformer core and winding assembly

Guangbian oil immersed transformer tank and cooling fins

Application & Quality

Our Oil Immersed Transformer series is used for primary voltage reduction from power plants and high-voltage substations to distribution networks.

Designed for a service life of 25–30 years, many of our early-produced transformers are still operating reliably today. With over 20 years of manufacturing and export experience, we supply IEC, GB, and CE standard transformers with customized solutions available.

Standard customized production can usually be completed within 15 days, ensuring efficient delivery for global power projects.

Why Choose Us?

Let's use the oil tank as an example. For 10KVA to 5000KVA, you're already looking at hundreds of different oil tank types. Change the input voltage, and the tank size changes too - suddenly you're dealing with thousands of variations. And that's just the tank itself. Then you've got the covers, the insulating porcelain bushings... the combinations add up fast.

Here's the real talk. Need just one unit, with special voltage and custom parts? Most factories would charge you an arm and a leg for sourcing those parts - and that premium lands on you. But with GUANGBIAN's 20 years in this game? One unit gets you wholesale pricing too.

Factory Direct from GUANGBIAN

GUANGBIAN is a professional Oil Immersed Transformer manufacturer providing wholesale, OEM, and custom solutions for global power projects. From standard models to special technical requirements, we support stable production and fast delivery.

We keep regular models in stock and offer customized configurations based on your voltage, capacity, and application needs.

For pricing, quotations, or technical support, contact GUANGBIAN anytime.

Guangbian oil immersed transformer factory production line

Guangbian oil immersed transformer quality testing

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A Replacement Oil Immersed Transformer by Guangbian, China manufacturer and factory supplier, is designed for reliable upgrade and direct replacement of aging power systems, delivering stable performance, high compatibility, and cost-effective industrial power transformation solutions.

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Parallel Operation Transformer by Guangbian is a reliable and efficient power solution designed for flexible capacity expansion and stable load sharing, making it an ideal choice for buyers seeking a China transformer manufacturer, industrial power transformer supplier, and cost-effective factory-direct electrical equipment for continuous and scalable power systems.

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1000kVA Transformer

GUANGBIAN 1000kVA Transformer is a high-efficiency power distribution transformer designed for industrial, utility, and commercial applications, featuring stable voltage output, low loss performance, reliable operation, and customizable solutions for buyers seeking a durable 1000kVA distribution transformer supplier and transformer manufacturer from China.

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75KVA Oil Immersed Transformer

Guangbian 75kVA oil immersed transformer delivers efficient, low-loss and stable power distribution with long service life, ideal for buyers searching 75kVA distribution transformer supplier, oil-immersed transformer manufacturer, and power transformer for sale.

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As a heavy-duty power solution, the 3150kVA 35kV Oil-Immersed Transformer from Guangbian ensures excellent overload capacity and low loss operation, ideal for buyers searching for China transformer manufacturer and bulk procurement.

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2500kVA 35kV Oil-Immersed Distribution Transformer

With ultra-low losses, strong overload capacity, and stable insulation performance, the China 2500kVA 35kV Oil-Immersed Distribution Transformer from Guangbian is ideal for utility power distribution, industrial substations, and high-voltage transformer projects.

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