The 10kV S13 (S20/S22)-M series oil-immersed distribution transformer is an upgraded generation of high-efficiency and low-loss transformers designed to meet modern power distribution requirements.

Compared with the S11 series, the S13 series features lower no-load loss, improved energy efficiency, and reduced operating costs, making it an ideal solution for energy-saving power systems.

The core is manufactured using high-quality cold-rolled grain-oriented silicon steel with a 45° fully mitered joint structure, ensuring excellent magnetic performance, reduced losses, and low noise operation.

This transformer is widely applied in:

• Urban and rural power distribution networks
• Industrial and mining enterprises
• Power grid renovation and upgrading projects
• Compact prefabricated substations (package substations)

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🔹 Standards Compliance

This product complies with major international and national standards:

• IEC 60076-1 – Power Transformers
• GB/T 1094.1 – Power Transformers
• GB/T 6451 – Technical Requirements for Oil-Immersed Transformers
• JB/T 10088 – Sound Levels of 6kV–500kV Transformers
• GB 20052-2020 – Minimum Allowable Values of Energy Efficiency

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🔹 Key Features

✔ Higher Energy Efficiency

• Lower no-load loss than S11 series
• Meets higher energy-saving requirements
• Reduces long-term operational costs

✔ Low Noise Performance

• Optimized core design minimizes vibration
• Suitable for residential and noise-sensitive environments

✔ Compact & Robust Structure

• Space-saving design
• Ideal for prefabricated substations

✔ Strong Short-Circuit Resistance

• Advanced winding technology
• Excellent mechanical and thermal stability

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🔹 Structural Design

🔸 Core

• High-permeability grain-oriented silicon steel
• Multi-step structure (3-joint / 5-joint / 7-joint options)
• Fully mitered joints for:
  • Reduced no-load loss
  • Lower noise

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🔸 Windings

• High-quality enameled copper wire (QQ type)
• Oxygen-free copper conductors
• Available winding structures:
  • Cylindrical
  • Continuous
  • Helical
  • Foil winding

➡ Provides:

• High electrical strength
• Strong mechanical durability
• Efficient heat dissipation

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🔸 Oil Tank

• Made of high-quality welded steel plates
• Available structures:
  • Oval type
  • Rectangular type
• Cooling methods:
  • Radiator fins
  • Corrugated tank
• Surface treatment:
  • Acid cleaning & phosphating
  • Three-coat-one-finish painting

➡ Features:

• Excellent corrosion resistance
• Reliable sealing performance
• Long service life

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🔹 Applications

• Power distribution systems
• Industrial facilities and factories
• Renewable energy integration projects
• Urban infrastructure construction
• Compact substations

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🔹 Advantages Summary

• Higher efficiency than S11 transformers
• Energy-saving & environmentally friendly
• Low noise & low loss
• Reliable and durable
• Suitable for modern smart grids

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❓ FAQ

1️⃣ What is the difference between S11 and S13 transformers?

The S13 transformer offers lower no-load loss and higher energy efficiency compared to S11.
👉 This results in reduced electricity consumption and lower operating costs over time.

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2️⃣ Can the S13 transformer be customized?

Yes, customization is available, including:

• Rated capacity (kVA)
• Voltage levels (HV/LV)
• Vector group
• Cooling method
• Installation type

👉 Custom designs are widely used in industrial and substation projects.

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3️⃣ Is this transformer suitable for outdoor and substation use?

Yes, it is designed for both outdoor installation and prefabricated substations.

It features:

• Strong sealing performance
• Corrosion-resistant coating
• Stable operation in harsh environments

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4️⃣ What is the typical delivery time?

Delivery time depends on specifications and order quantity.

• Standard models: 3–6 weeks
• Customized orders: 4–8 weeks

👉 Fast production and flexible scheduling are available for urgent projects.