1. Project Overview: SZ11 110kV 50MVA Transformer in Africa
The Radiastar SZ11‑50000/110 transformer is widely adopted in modern substations across Africa, supporting medium-to-high voltage power distribution.
Key Specifications:
- Rated Voltage: 110kV
- Capacity: 50MVA
- Core Type: Three-phase oil-immersed dual-winding transformer
- On-load Tap Changer (OLTC): Ensures voltage regulation for varying load conditions
Weight & Transport:
- Net Transformer Body: 62 tons
- Transformer Oil: 14 tons
- Transportation Weight: 70 tons
- Total Operational Weight: 76 tons
Dimensions (L × W × H mm):
Electrical Parameters:
- Low Voltage Side: 10.5kV
- Short-Circuit Impedance: 10.5%
- Cooling Method: ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced)
- Track Gauge (if rail-based project): 2000mm
2. Radiastar Manufacturing Excellence
a. Advanced Production Facilities
Radiastar’s transformer oil tanks are produced in state-of-the-art ISO-certified factories, equipped with:
- CNC machining centers for precise tank fabrication
- Automated welding lines ensuring leak-proof joints
- High-capacity oil purification and filling systems
b. Quality Control
Every transformer tank undergoes strict quality assurance protocols:
- Hydrostatic pressure testing for structural integrity
- Vacuum and oil dielectric testing
- Thermal cycle testing to simulate real-world conditions
c. Material Advantages
- High-strength cold-rolled steel for durability
- Premium insulating oil for optimal heat dissipation and insulation performance
- Corrosion-resistant coating for long-term reliability in harsh African climates
3. Technical Features and Advantages
a. On-Load Tap Changer (OLTC)
- Maintains stable voltage under fluctuating load
- Reduces stress on downstream electrical equipment
- Extends transformer lifespan
b. Cooling System
- ONAN: Natural oil circulation and ambient air cooling, suitable for rural substations
- ONAF: Forced air cooling option for high-load urban applications
c. High Reliability
- Short-circuit impedance of 10.5% ensures robust fault tolerance
- Designed to handle heavy-duty electrical loads with minimal maintenance
d. Optimal Size & Weight
- Compact design allows easier transportation and installation
- Total operational weight of 76 tons aligns with African logistical capabilities
4. Typical African Applications
a. Urban Power Distribution
- Supplying high-density residential and industrial areas
- Compatible with substations ranging from 110kV to 220kV
b. Railway Electrification Projects
- Supports 2000mm track gauge rail systems
- Ensures stable power supply for electric traction and signaling
c. Renewable Energy Integration
- Efficiently connects solar farms or wind power stations to the grid
- Oil-immersed design ensures durability under fluctuating renewable energy loads
5. Radiastar in Action: African Case Study
Project: Modern Substation Upgrade, West Africa
- Radiastar delivered a 50MVA SZ11 transformer with customized oil tank design
- Installation reduced energy loss and improved load balancing
- Local engineers praised ease of assembly and maintenance
Benefits:
- Enhanced grid stability for urban and industrial zones
- Extended operational lifespan due to high-quality oil tank and insulation
- Minimal downtime, even under high-temperature conditions
6. Why Choose Radiastar Transformer Oil Tanks?
- Proven Manufacturing Expertise: Over 20 years of transformer production excellence
- Customized Solutions: Tailored dimensions, cooling systems, and insulation for specific African conditions
- Durable & Reliable: Premium materials, precise welding, and advanced quality testing
- Support & Service: Installation guidance, maintenance training, and technical support worldwide
7. Conclusion
The Radiastar 110kV 50MVA oil-immersed transformer with SZ11 series oil tank is a critical enabler for Africa’s electrification projects. Its combination of advanced manufacturing, robust technical design, and proven field performance makes it the top choice for modern substations, renewable energy integration, and railway electrification.
Contact Radiastar Today to learn how our high-performance transformer solutions can empower your power grid expansion in Africa and beyond.
