The SF20-8000KVA Power Transformer is a large-capacity oil-immersed power transformer with a rated capacity of 8000KVA, part of the SF20 series. It features a high-permeability silicon steel core and low-loss winding design. To address the heat dissipation challenges of large-capacity transformers under sustained full-load operation, it is equipped with a forced air cooling (ONAF) system, ensuring safe and stable operation.
Suitable for 10kV/35kV class power transmission and distribution systems, it serves as the primary power equipment for industrial enterprises, substations, commercial complexes, and more.
Large Capacity for High-Load Scenarios
Rated capacity of 8000KVA, meeting medium-to-large industrial power distribution and regional substation demands
Strong short-term overload capability, adaptable to impact loads
Fully Sealed Structure, Maintenance-Free
Fully sealed corrugated tank or expansion tank design prevents air and moisture ingress
Insulation oil resists oxidation, enabling long-term maintenance-free operation after commissioning
Outstanding Heat Dissipation & Insulation:
Effectively solves the heat dissipation problem of large-capacity transformers and the insulation challenge of high-voltage transformers, avoiding equipment failure caused by overheating or insulation damage, and improving the overall operational reliability.
Fully Sealed Design:
The transformer adopts a fully sealed structure, which can effectively prevent insulation oxidation, reduce aging speed of internal components, and extend the service life. It also has strong resistance to external environmental interference, suitable for long-term outdoor operation.
High Reliability, Multi-Layer Protection
Equipped with gas relay (Buchholz protection), pressure relief valve, oil level gauge, and temperature controller
Tank rigorously tested for pressure and sealing to ensure no leakage
Vacuum oil-filling process eliminates residual moisture and gas
Low Noise Design
Optimized core lamination and clamping structure, operating noise controlled at 55~65dB(A) (at 1m distance)
Superior Short-Circuit Withstand Capability
Windings use high-strength continuously transposed conductors or self-adhesive transposed conductors with precision axial compression
Passes rigorous short-circuit withstand tests to ensure no displacement or deformation under grid faults
Factories and Mines: Main distribution transformers for steel mills, cement plants, chemical plants, etc.
Large Equipment Power Supply: Stable power for large compressors, crushers, rolling mills and other impact loads
10kV/35kV Main Transformers: Core step-up/step-down equipment for urban distribution networks and industrial park substations
Renewable Energy Integration: Step-up transformers for centralized PV power stations and small wind farms
Large Commercial Complexes: Dedicated distribution transformers for data centers, super high-rise buildings, large hospitals
Airports/Stations/Ports: Primary power supply for transportation hubs requiring extremely high reliability
Optional high-altitude (derated above 3000m) or corrosion-resistant (coastal/chemical environment) configurations
Forced air cooling system offers significant advantages in tropical/subtropical high-temperature regions
Model | SF20-8000/10(35) |
Rated Capacity | 8000 KVA |
Voltage Combination | 10±5%/0.4kV or 35±5%/10.5kV |
Connection Group | Dyn11 or Yd11 |
Cooling Method | ONAF (Oil Natural Air Forced) |
Insulation Class | Class A or Class F |
No-Load Loss | Per energy efficiency grade |
Load Loss | Per energy efficiency grade |
Impedance Voltage | 7.5%~8.5% |
Noise Level | ≤ 65 dB(A) |
Contact us to discuss your power distribution needs and get a customized solution from our expert team.
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No.788 Wenyi Road, Bihu Town, Lishui City, Zhejiang Province, China