Jiangsu Yawei Transformer Co.,Ltd. is one of the leading manufacturers and suppliers of scb14-25000kva 20±2×2.5%/6.3 dyn1 6% dry type transformer in China. Please feel free to buy high quality scb14-25000kva 20±2×2.5%/6.3 dyn1 6% dry type transformer from our factory. Customized orders are welcome.
High-Capacity Cast Resin Dry Type Transformer for Industrial Power Distribution
Product Model
SCB14-25000KVA 20±2×2.5%/6.3 Dyn1 6%
Model Explanation
| Parameter | Description |
|---|---|
| SCB14 | Cast resin dry type transformer, high-efficiency design |
| 25000KVA | Rated capacity: 25,000 kVA (25 MVA) |
| 20kV | High-voltage rated voltage |
| ±2×2.5% | Off-circuit voltage adjustment range |
| 6.3kV | Low-voltage rated voltage |
| Dyn1 | Vector group: HV Delta, LV Star with neutral, phase displacement 30° |
| 6% | Short-circuit impedance |
Main Technical Specifications
| Item | Specification |
|---|---|
| Transformer Type | Three-phase cast resin dry type transformer |
| Rated Capacity | 25000 kVA |
| Rated Frequency | 50 Hz / 60 Hz |
| HV Voltage | 20 kV |
| HV Voltage Regulation | ±2×2.5% |
| LV Voltage | 6.3 kV |
| Connection Group | Dyn1 |
| Short Circuit Impedance | 6% |
| Cooling Method | AN / AF (Air Natural / Air Forced) |
| Insulation Class | F Class or higher |
| Installation Type | Indoor / Customized outdoor enclosure |
| Standard | IEC 60076-11, GB/T 1094.11 |
| Application | Industrial and power distribution systems |
Final parameters can be customized according to project requirements.
Transformer Structure
Core
The transformer uses a high-quality laminated silicon steel core featuring:
Low magnetic loss
Reduced noise level
High efficiency
Improved energy-saving performance
01
HV Winding
The 20kV high-voltage winding uses cast resin insulation technology to provide:
High dielectric strength
Strong mechanical stability
Reliable insulation aging performance
02
LV Winding
The 6.3kV low-voltage winding is designed for:
Large current operation
Reduced temperature rise
Stable power output
03
Temperature Monitoring System
Optional accessories include:
PT100 temperature sensors
Digital temperature controller
Cooling fan control system
Alarm and trip functions
04
Product Features
1. High Safety with Oil-Free Design
Unlike oil-immersed transformers, the SCB14-25000KVA uses epoxy resin insulation technology. The windings are encapsulated with solid insulation materials, providing:
No risk of transformer oil leakage
Reduced fire hazard
Lower environmental impact
Suitable for indoor installations and high fire-protection areas
Dry-type transformers are commonly applied in locations requiring enhanced safety, including industrial facilities, commercial buildings, substations, and infrastructure projects.
2. Excellent Electrical Performance
The transformer is designed with optimized electromagnetic structure and high-quality materials to achieve:
Low no-load losses
Low load losses
Stable voltage regulation
High short-circuit withstand capability
Reliable operation under heavy load conditions
The 6% impedance design provides a good balance between voltage stability and short-circuit current limitation.
3. Advanced Epoxy Resin Insulation System
The high-voltage and low-voltage windings adopt epoxy resin encapsulation technology, offering:
Strong moisture resistance
Excellent insulation performance
High mechanical strength
Resistance against dust and harsh environments
This makes the transformer suitable for industrial environments with demanding operating conditions.
4. Efficient Cooling System
The transformer supports:
AN Cooling (Air Natural)
Natural air circulation
Low operating noise
Lower maintenance requirements
AF Cooling (Air Forced)
Additional cooling fans increase heat dissipation
Suitable for temporary overload conditions
Improves transformer load capability
Typical Applications
Industrial Plants
Steel plants
Chemical factories
Cement plants
Manufacturing facilities
Power Generation
Hydropower stations
Solar power plants
Wind energy projects
Energy storage systems
Mining Industry
Mining substations
Underground power supply
Heavy-duty electrical equipment
Infrastructure
Airports
Rail transit systems
Large commercial complexes
Data centers
Advantages Compared with Oil-Immersed Transformers
| Feature | SCB14 Dry Type Transformer | Oil-Immersed Transformer |
|---|---|---|
| Insulation Medium | Epoxy resin | Transformer oil |
| Fire Safety | Excellent | Requires oil fire protection |
| Oil Leakage Risk | None | Possible |
| Maintenance | Low | Higher |
| Installation | Indoor-friendly | Usually outdoor |
| Environmental Impact | Lower | Requires oil management |
Protection Accessories (Optional)
The transformer can be equipped with:
Temperature controller
Cooling fans
Aluminum alloy enclosure
IP20/IP23 protection enclosure
Anti-vibration pads
Door interlocking system
HV/LV terminal protection covers
Surge protection devices
Quality Testing
Each SCB14-25000KVA transformer undergoes strict factory testing, including:
Routine Tests
Winding resistance measurement
Voltage ratio test
Vector group test
No-load loss measurement
Load loss measurement
Insulation resistance test
Dielectric withstand test
Type Tests (According to requirements)
Temperature rise test
Lightning impulse test
Short-circuit withstand test
Noise level test
Dry-type transformers are covered by the IEC 60076-11 standard, which defines requirements for dry-type power transformers.
Why Choose SCB14-25000KVA Dry Type Transformer?
✅ 25MVA high-capacity power conversion capability
✅ Safe oil-free cast resin insulation technology
✅ High efficiency and low energy losses
✅ Strong resistance to moisture and harsh environments
✅ Suitable for critical industrial power systems
✅ Low maintenance and long service life
✅ Customizable cooling and enclosure solutions
Technical Summary
The SCB14-25000KVA 20±2×2.5%/6.3 Dyn1 6% dry type transformer is an advanced medium-voltage power transformer solution designed for large-scale electrical distribution applications. Combining high capacity, fire-safe operation, reliable insulation performance, and efficient energy conversion, it provides a dependable power supply solution for modern industrial and infrastructure projects.
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