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The S11 series oil-immersed step-up transformer is engineered specifically for the rigorous demands of hydroelectric power generation. Available in 1250kVA and 1600kVA capacities, this unit features premium 100% copper winding design to ensure maximum electrical conductivity and mechanical strength. It efficiently elevates generated voltage (10kV-15kV) for long-distance grid transmission, offering a robust, low-loss solution for renewable energy developers and EPC contractors globally.
Key Features
100% Pure Copper Windings: Ensures superior thermal stability, higher short-circuit resistance, and significantly lower energy dissipation compared to aluminum alternatives.
Optimized for Hydro-Generation: Designed to handle continuous duty cycles and load fluctuations typical of small to medium-scale hydropower stations.
S11 Ultra-Low Loss Core: Utilizes high-permeability cold-rolled silicon steel, reducing no-load losses and improving overall Energy Efficiency Ratio (EER).
C5-M Corrosion Resistance: Finished with high-durability coating systems to withstand high-humidity environments near water sources.
Modular Customization: Flexible voltage ratios and bushing configurations to meet various international grid standards.
Technical Specifications
Core Technology
Stacked multi-step lap joints to minimize noise and magnetic flux leakage
Insulation System
Class A insulation with high-dielectric mineral oil, providing exceptional cooling and arc suppression
Winding Technique
Circular-concentric winding structure with high-density pressboard spacers for enhanced mechanical rigidity
Cooling Method
ONAN (Oil Natural Air Natural) with precision-engineered corrugated radiator fins
Protection Level
Fully sealed hermetic design to prevent oil oxidation and moisture ingress
Solutions for Arid & Dusty Regions
Environmental Challenge: In African regions with heavy dust and sandstorms, traditional seals often fail, leading to oil contamination and leakage, which causes equipment downtime.
Our Engineering Solution:
Double-Seal Bushing System: High-grade silicone rubber gaskets and specialized dust-proof covers prevent fine sand from eroding seals
Reinforced Corrugated Tank: Robotically welded with reinforced seams to ensure zero-leakage under extreme thermal expansion
Stainless Steel Hardware: All external fasteners made of 304/316 stainless steel to prevent rust in high-salinity environments
Frequently Asked Questions
Does the 1600kVA unit support 100% continuous full-load operation in high temperatures?
Yes, our S11 units are designed with an oversized cooling surface area to maintain rated performance even at ambient temperatures exceeding 45°C.
Are your transformers compliant with IEC 60076 standards?
Absolutely. All our power transformers are certified to IEC, ANSI, and IEEE standards, providing the compliance documentation required for international tenders.
How do you handle shipping to landlocked African countries?
We provide heavy-duty export packaging with seaworthy steel skids and vacuum-sealed moisture protection, ensuring safe transit via sea and inland trucking.
Can you provide customized primary/secondary voltage ratios for local grids?
Yes, we specialize in tailoring voltage configurations (e.g., 6.3kV to 15kV) to perfectly match your hydroelectric turbine output.
Do you offer on-site commissioning support?
We provide comprehensive remote technical guidance and can dispatch engineering teams for on-site supervision for large-scale EPC projects.
Partner with HENTG Power for reliable energy — Contact our engineering team today for a customized quote!
