Product Description

S20 series fully sealed oil-immersed distribution transformers are new-generation second-level energy-saving power distribution equipment. Adopting advanced amorphous alloy core technology and optimized electromagnetic design, it features ultra-low no-load loss, lower noise, higher efficiency and stronger short-circuit resistance compared with S11 and S13 series. Fully maintenance-free, widely used for urban & rural power grids, industrial parks, commercial and new energy power distribution projects, compliant with IEC 60076 international standards.

Core Features

Ultra-high Energy Saving Performance: Second-level national energy efficiency standard, no-load loss reduced by 15%-20% vs S13 series, significantly reducing long-term grid operation costs.

Fully Sealed Maintenance-free Structure: Integrally welded corrugated oil tank and vacuum oil injection process, no oil leakage, no need for regular oil replacement and routine maintenance.​​​​​​​

Strong Short-circuit Resistance: Optimized winding structure and integral fastening design, effectively avoid winding deformation under short-circuit impact, ensuring safe and stable operation.​​​​​​​

Ultra-low Operating Noise: Precision core lamination and structural damping design, operating noise ≤55dB, suitable for residential areas and environmentally sensitive zones.​​​​​​​

Stable Voltage Output: Standard ±2×2.5% off-circuit tap changer, flexible voltage adjustment to adapt to various grid voltage fluctuation environments.​​​​​​​

Excellent Environmental Adaptability: Waterproof, dust-proof, anti-corrosion and moisture-proof design, adaptable to outdoor high temperature, high humidity and high altitude harsh conditions.​​​​​​​

Long Service Life: Premium insulating materials and strict technological process, effectively delaying insulation aging, service life up to 30 years.

Details Table