The S series 20kV oil-immersed transformer features an optimized magnetic circuit and heat-resistant insulation system, delivering low losses, low noise, and strong short-circuit withstand capability.
It supports flexible configuration with various medium-voltage connection schemes and is widely used in urban and rural distribution networks, industrial parks, and high-load operating environments.
Ideal for 20kV medium-voltage system upgrades, with flexible connection options and low-loss performance.
Industrial Parks
Suitable for medium-voltage user substations, focusing on low noise and high reliability.
Regional Power Supply
Designed for suburban and developing areas with growing demand, ensuring stable long-term continuous operation.
Product Description
1
Strong Adaptability: The S11 series offers excellent thermal endurance and overload capability, ensuring stable operation under high temperatures and heavy load conditions.
2
Durable & Refined Finish: Fully polished and rust-removed surface with powder electrostatic coating, combined with wide fin radiators for long-lasting appearance and performance.
3
Leak-Free Design: Acrylic sealing materials with one-time molding technology ensure zero leakage, with both positive and negative pressure leak tests conducted before delivery.
4
Safe & Eco-Friendly: Materials and processes meet strict safety and environmental standards, producing no toxic gases and low smoke emissions, with no corrosive impact on the environment.
Product Features
Low-Loss Design
The S11 series adopts advanced core materials and optimized winding structure, reducing no-load losses by over 20% and load losses by more than 10%, significantly improving energy efficiency.
Low-Noise Operation
High-quality silicon steel and optimized magnetic circuit design effectively reduce noise levels, meeting environmental requirements for urban and residential areas.
Eco-Friendly & Energy Saving
Uses recyclable, environmentally friendly insulating oil with excellent sealing performance, ensuring no leakage and maintenance-free operation.
High Reliability
Robust winding and core structure provide strong short-circuit withstand capability. Premium insulation materials and high-temperature transformer oil ensure safe operation and extended service life.
Sealed & Leak-Resistant
Optimized tank sealing structure enhances pressure resistance and prevents leakage, ideal for long-term outdoor use.
Strong Short-Circuit Resistance
Reinforced winding and structural design improve resistance to short-circuit impacts, ensuring stable operation.
Main Parameters
Voltage Level
High voltage 20 kV / Low voltage 0.4 kV
Capacity Range
30kVA~3150kVA
Cooling Method
ONAN (Oil Natural Air Natural)
Vector Group
Dyn11 or Yyn0
Implementation Standard
GB 1094Power Transformers
GB/T 10228Technical Parameters and Requirements for Power Transformers
IEC 60354Transformer Loading Guide
GB/T 25384Energy Efficiency Limits and Grades for Power Transformers
ISO 14001Environmental Management System Standards
Technical Advantages
R&D Cloud Platform
An integrated digital platform combining electromagnetic optimization design, parametric modeling, performance analysis, structural optimization, and automatic drawing generation. It enables transformer design resource sharing and efficient data management, including search, modification, and version control.Simulation Analysis
Simulation Analysis
Comprehensive multi-physics simulation covering fluid flow, thermal field, electric field, leakage magnetic field, transient processes, and short-circuit forces. Each transformer series is optimized through thermal and flow analysis to accurately control winding temperature rise and hotspot distribution, ensuring reliable and stable performance.
Smart Operation & Maintenance Platform
By collecting key data such as temperature, current, voltage, vibration, and grid harmonics, the system enables real-time power quality analysis and fault alarms. It also supports mobile access for remote monitoring and intelligent O&M management.
