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Oil-immersed transformer: S11-M

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High Efficiency S11-M Oil-immersed Transformers from China Suppliers | Reliable Factory for Power Distribution

Introducing the S11-M series three-phase oil-immersed distribution transformers, an advanced energy-efficient solution designed to enhance the performance of the S9 series. These transformers are specifically crafted for industrial and mining enterprises, urban-rural power grids, and infrastructure distribution systems. As a vital element in modern power transmission and distribution networks, the S11-M series transformers ensure high efficiency, stability, and environmental sustainability. With our factory located in China, we are dedicated to providing reliable products and services as leading suppliers in the market. Upgrade your power distribution system today with our innovative transformers and experience unmatched performance and durability

Model S11-M

Product Details

Through dual optimization of materials and structural design, they achieve remarkable improvements in energy efficiency and reliability, making them ideal for industrial power supply, urban grid expansion, and renewable energy integration.

The oil tank features a fully sealed corrugated structure that completely isolates transformer oil from air, effectively preventing oil degradation and moisture absorption. This design extends maintenance intervals to 2–3 times longer than conventional products while delivering superior heat dissipation and short-circuit resistance.

With rated capacities ranging from 30kVA to 2500kVA and voltage levels up to 35kV, it meets diverse needs from small factories to large industrial parks. Its eco-friendly features align with green grid construction requirements, making it an ideal choice for driving energy transition.

⚡ 30kVA – 2500kVA 🔋 Up to 35kV 🌿 Eco-Friendly Design 🏭 Industrial Grade 🔒 Fully Sealed Structure

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Fully Sealed Corrugated Oil Tank

Completely isolates transformer oil from air, preventing oil degradation and moisture absorption for long-term reliability.

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Extended Maintenance Intervals

Maintenance cycles are 2–3× longer than conventional products, significantly reducing operational downtime and costs.

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Superior Heat Dissipation

Advanced structural design ensures excellent thermal management and strong short-circuit resistance under load.

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Adaptable to Harsh Environments

Designed for complex outdoor conditions including high temperatures, high humidity, and salt spray environments.

✅ Key Product Features

✔ Low-noise design for residential and urban grid applications
✔ High-reliability construction for uninterrupted power supply
✔ Core-free maintenance for simplified service operations
✔ Fully sealed corrugated structure to prevent oil oxidation
✔ Compatible with renewable energy integration systems
✔ Supports urban grid expansion and industrial power supply

📊 Technical Specifications

Parameter	Specification
Rated Capacity	30kVA – 2500kVA
Voltage Level	Up to 35kV
Oil Tank Structure	Fully sealed corrugated design
Maintenance Interval	2–3× longer than conventional products
Environmental Adaptability	High temperature, high humidity, salt spray
Application Scope	Industrial parks, urban grids, renewable energy

❓ Frequently Asked Questions

Q What is the rated capacity range of this transformer?

The transformer is available in rated capacities ranging from 30kVA to 2500kVA, making it suitable for a wide range of applications — from small factories to large industrial parks and urban grid infrastructure.

Q What voltage levels does this transformer support?

This transformer supports voltage levels up to 35kV, covering the requirements of most industrial power supply systems, urban distribution networks, and renewable energy integration projects.

Q How does the fully sealed corrugated oil tank benefit the transformer?

The fully sealed corrugated structure completely isolates the transformer oil from the surrounding air. This prevents oil oxidation and moisture absorption, which are the primary causes of insulation degradation. As a result, the transformer maintains stable performance over a longer service life and requires significantly less maintenance.

Q How much longer are the maintenance intervals compared to conventional transformers?

Thanks to the sealed design and advanced materials, maintenance intervals are 2 to 3 times longer than those of conventional transformers. This reduces operational downtime, lowers maintenance costs, and improves overall system availability.

Q Is this transformer suitable for outdoor and harsh environment installations?

Yes. The transformer is specifically designed to operate reliably in complex outdoor environments, including areas with high temperatures, high humidity, and salt spray conditions. Its robust construction ensures stable performance even in challenging climates.

Q Can this transformer be used in renewable energy and green grid projects?

Absolutely. The transformer's eco-friendly design and high energy efficiency make it fully compatible with renewable energy integration and green grid construction requirements. It is an ideal solution for solar farms, wind power projects, and sustainable urban power infrastructure.