Product Overview
The three-phase dry-type distribution transformer is a safe, environmentally friendly, and maintenance-free power conversion device widely used in indoor power distribution systems. Unlike oil-immersed transformers, dry-type transformers use air as the cooling and insulating medium, eliminating the risk of oil leakage and fire hazards. This makes them the preferred choice for applications where safety, environmental protection, and space constraints are critical considerations.
The product features high-quality epoxy resin vacuum-cast windings, providing excellent electrical insulation, mechanical strength, and moisture resistance. It is widely applied in commercial buildings, high-rise residential complexes, hospitals, schools, airports, subways, data centers, and industrial facilities.

Key Features
1. Fire Safety & Environmental Protection
• No insulating oil used – completely eliminates oil leakage and fire risks
• Self-extinguishing materials meet international fire safety standards
• Environmentally friendly, recyclable materials with zero pollution to the surrounding environment
2. Low Loss & High Energy Efficiency
• Core made of high-quality cold-rolled grain-oriented silicon steel, significantly reducing no-load losses
• Optimized winding design minimizes stray losses and eddy current losses
• Available in Energy Efficiency Grade 1, 2, and 3 to support national energy-saving policies
3. Excellent Short-Circuit Withstand Capability
• Epoxy resin vacuum-cast windings provide superior mechanical strength and adhesion
• High-voltage windings with glass-fiber reinforced structure enhance impact resistance
• Robust coil structure withstands short-circuit forces without deformation
4. Superior Moisture & Pollution Resistance
• Epoxy resin encapsulation provides excellent moisture-proof and dust-proof performance
• Suitable for high-humidity and polluted environments without performance degradation
• No pre-drying required before commissioning, even in damp conditions
5. Low Noise & Low Partial Discharge
• Advanced manufacturing processes ensure low noise levels below international standards
• Precision winding and casting processes control partial discharge levels below 5pC
• Vibration-damping design minimizes operational vibration and noise transmission
6. Maintenance-Free Operation
• No oil or liquid media – eliminates routine oil testing and replacement
• No core lifting inspection or periodic maintenance required
• Simple cleaning of exterior surfaces is all that is needed for long-term reliable operation

Technical Specifications
Rated Power: 30kVA ~ 10,000kVA and above
HV Voltage: 6kV, 6.3kV, 10kV, 10.5kV, 11kV, 20kV, 35kV (customizable)
LV Voltage: 0.4kV, 0.415kV, 0.433kV, 0.69kV (customizable)
Vector Group: Dyn11, Yyn0, Yzn11 (customizable)
Tapping Range: ±5% or ±2×2.5% (customizable)
Short-Circuit Impedance: 4% ~ 6% (depending on capacity rating)
Frequency: 50Hz / 60Hz
Cooling Method: AN (Air Natural) / AF (Air Forced)
Insulation Class: F-Class (155°C) or H-Class (180°C)
Temperature Rise Limits: 100K (F-Class) / 125K (H-Class)
Core Structure: Three-phase three-column or five-column structureModel Series
SC(B)10-(30-10000)/10kV – Three-Phase Dry-Type Transformer (Standard series)
SC(B)11-(30-10000)/10kV – Three-Phase Dry-Type Transformer (Enhanced efficiency series)
SC(B)13-(30-10000)/10kV – Three-Phase Dry-Type Transformer (High efficiency series)
SC(B)H15-(30-10000)/10kV – Three-Phase Dry-Type Transformer (Ultra-high efficiency series)

Applications
• Commercial Buildings: shopping malls, office towers, hotels, exhibition centers
• Public Facilities: hospitals, schools, museums, libraries, sports stadiums
• Transportation Infrastructure: airports, railway stations, subway systems, ports
• Industrial Facilities: manufacturing plants, pharmaceutical factories, food processing
• Data Centers: server rooms, telecommunications hubs, IT infrastructure
• Residential Complexes: high-rise apartment buildings, gated communities
• Renewable Energy: wind power, photovoltaic, and energy storage systems (indoor installations)

Compliance Standards
• IEC 60076 Series
• GB 1094 – Power Transformers
• GB/T 10228 – Technical Parameters and Requirements for Three-Phase Dry-Type Distribution Transformers
• GB 20052-2020 – Energy Efficiency Limits and Energy Efficiency Grades for Power Transformers
• GB/T 22072 – Technical Specification for Dry-Type Power Transformers

Why Choose Us
• Safety First: oil-free design eliminates fire and explosion risks, ensuring safe operation in densely populated areas
• Superior Performance: low partial discharge, low noise, and low loss for reliable long-term operation
• Professional Manufacturing: years of R&D and production experience in the dry-type transformer industry
• Quality Assurance: ISO 9001 certified with full-process quality control from raw materials to final testing
• Customization Services: flexible customization of capacity, voltage, vector group, and other parameters
• Comprehensive After-Sales: technical support, installation guidance, and long-term maintenance services