Sz11-M 10kV 20kv 35kV on-Load Regulating Oil-Immersed Power Transformer
On-Load Voltage Regulation for Continuous Operation: The SZ11 transformer supports manual or automatic on-load voltage regulation, allowing voltage adjustment without power interruption and ensuring stable system operation.
Enhanced Mechanical Strength and Short-Circuit Resistance: Both high- and low-voltage windings are wound on high-strength insulating cylinders, significantly improving the transformer’s ability to withstand short-circuit forces.
Strong Overload Capacity with Improved Heat Dissipation: Optimized design and advanced materials ensure low coil heating, excellent cooling performance, and strong overload capability for demanding power applications.
Low Noise and Reliable Performance: The transformer features low operational noise, high reliability, and easy installation, making it suitable for medium and small substations serving industrial and agricultural power distribution.
Introduction to the SZ11-M 10kV / 20kV / 35kV On-Load Regulating Oil-Immersed Power Transformer
This product is widely used in power systems and serves as the primary transformer equipment for medium- and small-sized substations, providing power distribution and lighting for industrial and agricultural applications.
By incorporating advanced technologies from both domestic and international sources, utilizing new high-quality materials, and optimizing structural design, the product achieves a more refined configuration and significantly enhances electrical strength, mechanical durability, and heat dissipation performance.
Advantages of the Three-Phase Oil-Immersed SZ11 Transformer
The SZ11 on-load regulating transformer allows manual or automatic voltage regulation under load, enabling adjustment without interrupting power supply.
The high- and low-voltage windings are wound around high-strength insulating cylinders, which enhances the transformer’s ability to withstand short-circuit forces.
The windings generate minimal heat and the transformer features strong overload capability.
It operates with low noise, offers reliable performance, and is easy to install.
![Sz11-M 10kV 20kv 35kV on-Load Regulating Oil-Immersed Power Transformer]( "Sz11-M 10kV 20kv 35kV on-Load Regulating Oil-Immersed Power Transformer")
Parameters of Sz11 oil-immersed transformers with capacity from 30kVA – 2500kVA and voltage 10kV
| Rated capacity(kVA) | Voltage | Maximum no-load losses (kW) | Maximum on-load losses(kW) | Short circuit impedance Uk (% ) |
| 30 | 0.1 | 0.52 | 4 | |
| 50 | 0.13 | 0.76 | 4 | |
| 63 | 0.15 | 0.91 | 4 | |
| 80 | 0.19 | 1.09 | 4 | |
| 100 | 0.22 | 1.31 | 4 | |
| 125 | 0.26 | 1.57 | 4 | |
| 160 | 0.31 | 1.91 | 4 | |
| 200 | 6 | 0.37 | 2.26 | 4 |
| 250 | 6.3 | 0.43 | 2.65 | 4 |
| 315 | 10 | 0.52 | 3.17 | 4 |
| 400 | 10.5 | 0.62 | 3.74 | 4 |
| 500 | 11 | 0.74 | 4.43 | 4 |
| 630 | 0.92 | 5.39 | 4.5 | |
| 800 | 1.08 | 6.52 | 4.5 | |
| 1000 | 1.31 | 8.97 | 4.5 | |
| 1250 | 1.5 | 11.13 | 4.5 | |
| 1600 | 1.85 | 12.61 | 4.5 | |
| 2000 | 2.23 | 14.35 | 4.5 | |
| 2500 | 2.5 | 15.63 | 4.5 |
