The 10kV SGB series dry-type transformer is a high-performance transformer designed for harsh environments, high fire-safety requirements, and fluctuating load conditions.

Unlike cast resin transformers, the SGB series adopts VPI (Vacuum Pressure Impregnation) technology combined with NOMEX insulation, providing excellent thermal performance, superior safety, and long service life.

It is especially suitable for environments with:

• High humidity
• Heavy pollution
• Large load fluctuations
• Strict fire safety requirements

Typical applications include:

• Airports and power plants
• Metallurgical industries
• Hospitals and high-rise buildings
• Commercial centers
• Petrochemical and nuclear facilities

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🔹 Standards Compliance

• IEC 60076-11 – Dry-Type Power Transformers
• GB/T 1094.1 – Power Transformers
• GB/T 1094.11 – Dry-Type Transformers
• GB/T 10228 – Technical Requirements for Dry-Type Transformers
• JB/T 10088 – Sound Levels of 6kV–500kV Transformers
• GB 20052-2020 – Energy Efficiency Standards

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🔹 Key Features

✔ Excellent Thermal Performance

• Superior heat dissipation
• Long thermal lifespan
• Supports 120% continuous overload under IP45 conditions without forced cooling

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✔ Exceptional Fire Safety

• Flame-retardant materials
• No smoke emission even under 800°C high-temperature exposure

👉 Ideal for fire-sensitive environments

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✔ Strong Thermal Shock Resistance

• Can withstand sudden full-load operation at 50°C ambient temperature

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✔ 100% Moisture & Water Resistance

• Fully sealed insulation system
• Excellent hydrophobic and anti-moisture properties

👉 Suitable for humid and polluted environments

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✔ Ultra-Low Partial Discharge

• Optimized winding structure
• Strong electric field control

👉 Ensures stable and long-term operation

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✔ Energy Saving & Eco-Friendly

• Low loss and high efficiency
• Recyclable insulation materials after service life

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✔ Intelligent Monitoring

• Real-time operation monitoring
• Optional remote communication system

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🔹 Structural Design

🔸 Insulation System

• High-performance NOMEX insulation (DuPont)
• VPI vacuum pressure impregnation process
• Multi-cycle baking and curing

➡ Benefits:

• High thermal class (Class H)
• Excellent mechanical strength
• Long service life

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🔸 Windings

• High-voltage winding: continuous winding structure
• Low-voltage winding: robust conductor design

➡ Features:

• Strong short-circuit resistance
• Efficient cooling performance

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🔸 Core

• High-quality grain-oriented silicon steel
• 45° step-lap structure
• Elastic fixing between core and winding

➡ Advantages:

• Reduced no-load loss
• Low noise operation

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🔸 Mechanical Structure

• Elastic support system reduces vibration
• Rigid clamping structure improves stability

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🔸 Terminals

• Top-mounted terminals
• Mid-position tap changer
• Plate-type low-voltage terminals with argon arc welding

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🔹 Applications

• Airports and transportation hubs
• Power plants and substations
• Metallurgical and heavy industries
• Hospitals and high-rise buildings
• Petrochemical and nuclear facilities
• Coastal and high-humidity environments

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🔹 Advantages Summary

• VPI + NOMEX insulation system
• Excellent fire resistance and safety
• Strong overload and thermal shock performance
• Fully moisture-proof and pollution-resistant
• Low partial discharge and high reliability
• Maintenance-friendly and long service life

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❓ FAQ

1️⃣ What is the difference between SGB and SCB transformers?

• SGB: VPI + NOMEX insulation (non-cast type)
• SCB: Epoxy resin cast insulation

👉 SGB is better for moist, polluted, and high-temperature environments, while SCB is better for indoor safety applications.

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2️⃣ Can the SGB transformer operate in humid environments?

Yes, it features:

• Hydrophobic insulation
• Moisture resistance
• Fully sealed design

👉 Ideal for coastal and high-humidity areas.

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3️⃣ Does it require forced cooling?

No, under normal conditions:

• Can operate at full load without forced cooling
• Supports overload operation

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4️⃣ Is remote monitoring available?

Yes, it supports:

• Temperature monitoring
• Alarm and protection system
• Remote communication