Overview
The S11/S13 series oil-immersed distribution transformer is our flagship product line, trusted by utility companies and industrial customers across 30+ countries. Designed for reliability, efficiency, and long service life in demanding power distribution applications.
Key Features
- High Efficiency: Reduced no-load and load losses compared to S9 series, meeting latest energy efficiency standards
- Low Noise: Optimized core design achieves noise levels as low as 45dB for S13 series
- Wide Capacity Range: From compact 30kVA pole-mounted units to 40,000kVA substation transformers
- Dual Winding Option: Available with copper or aluminum windings to match budget and performance requirements
- Flexible Cooling: ONAN standard, upgradeable to ONAF/OFAF for higher capacity units
Applications
- Urban and rural power distribution networks
- Industrial facilities and manufacturing plants
- Commercial building power supply
- Renewable energy grid connection
- Mining and petroleum operations
Quality Assurance
Every transformer undergoes comprehensive factory testing including:
- Routine tests per IEC 60076-1
- Type tests including temperature rise and impulse voltage
- Special tests available upon request (noise level, harmonic response)
All products are manufactured in our ISO 9001 certified, CNAS-accredited 60,000m² factory with automated CNC winding machines and vacuum oil processing systems.