Decoding Oil-Immersed Transformer Models: Key Specifications and Application Insights
In the global power transmission and distribution system, transformers are like the "heart" of voltage conversion. Their model details directly affect how well they work and where they can be used. Among different types, oil-immersed transformers are popular because they have good insulation and cool down effectively. Their models contain a lot of useful technical information-understanding these codes helps you choose the right product. Let's break down the key points and look at common options like the 50-2500kVA/35kV Oil Immersed Double Winding Transformer, 3150-20000kVA/35kV Oil Immersed Power Transformer, and 50-2500kVA/10kV Super Low-loss Oil Immersed Transformer. All are core products from Zhejiang Lvma Electric Co., Ltd. (LVMA)-an ISO 9001 certified manufacturer with 17 years of dedicated experience in making distribution transformers. We've grown from a traditional maker to an intelligent, green electrical solutions provider.
How Oil-Immersed Transformer Models Work
Oil-immersed transformer models follow a standard system. They use letters and numbers to show important details:
Phase: "S" stands for three-phase (the most common type in factories and industrial sites), "D" stands for single-phase.
Cooling: "F" means air-cooled, "O" means oil-immersed self-cooled (ONAN). Combinations like "ONAF" let the transformer switch between self-cooling and fan cooling.
Windings: "S" means three-winding. Double-winding designs (most used for power distribution) are often part of basic models-like the 50-2500kVA/35kV Oil Immersed Double Winding Transformer. It's a flagship product from LVMA, built to meet global quality standards with the help of digital production processes.
Voltage regulation: "Z" means on-load voltage regulation. This is important for stable operation when the power grid changes.
Design generation: Numbers like "9" or "13" show different technology versions. Higher numbers usually mean better efficiency-matching LVMA's focus on green energy solutions.
Capacity & voltage: The last numbers tell you rated capacity (kVA) and primary voltage (kV). For example, "31500/110" means 31500kVA capacity and 110kV primary voltage.
Take the classic model "SFSZ9-31500/110" as an example: "S" (three-phase) + "F" (air-cooled) + "S" (three-winding) + "Z" (on-load voltage regulation) + "9" (9th-gen design) + "31500" (31500kVA capacity) + "110" (110kV primary voltage). This same logic applies to modern products like the 3150-20000kVA/35kV Oil Immersed Power Transformer. Its "3150-20000kVA" range works well for medium to large power loads. LVMA's version of this model uses over 40 patents from our team, led by Mr. Ye Jinfei-a veteran with more than 40 years of R&D experience who helped create China's GB standards. Founded in 2018, LVMA has quickly expanded its global reach by focusing on innovation and reliability.
Key Parameters & Where to Use These Transformers
1.Capacity: Matching Your Power Needs
Capacity tells you how much power a transformer can handle. Small-to-medium capacity models like the 50-2500kVA/35kV Oil Immersed Double Winding Transformer are great for industrial parks and regional power distribution networks. They balance efficiency and cost, and LVMA supplies this model to global markets including Europe, the Middle East, Southeast Asia, South America, and Africa-supported by professional after-sales service. For larger projects like municipal power grids and heavy industry, the 3150-20000kVA/35kV Oil Immersed Power Transformer is a better fit. It handles high-load, non-stop operation with advanced cooling systems (often ONAF) to control heat, and includes LVMA's intelligent monitoring systems for real-time performance tracking.
2.Voltage Level: Fitting the Power Grid
35kV and 10kV are the most common medium-voltage grades. The 50-2500kVA/35kV Oil Immersed Double Winding Transformer connects high-voltage transmission and medium-voltage distribution. It ensures stable power flow in suburban grids. The 10kV grade is represented by the 50-2500kVA/10kV Super Low-loss Oil Immersed Transformer. It's widely used in urban residential areas, commercial centers, and small industrial sites. Its low-voltage output (usually 0.4kV) directly powers daily electrical equipment. LVMA's focus on quality and safety-strengthened by ISO 9001 certification-makes this model a trusted choice in different global climates.
3.Efficiency: Why Low-Loss Matters
Energy efficiency is a key factor when choosing a transformer these days-so low-loss models are in high demand. The 50-2500kVA/10kV Super Low-loss Oil Immersed Transformer uses better core materials (like amorphous alloy) and coil designs. This cuts no-load loss by more than 37% compared to older models, saving a lot of electricity over time. It's a top choice for green building projects and areas that care about energy use. LVMA's innovative design, backed by our R&D team's 40+ patents, boosts these efficiency gains-aligning with the company's green energy mission. Even the 3150-20000kVA/35kV Oil Immersed Power Transformer has low-loss features, balancing large capacity with eco-friendliness.
Tips for Choosing the Right Transformer
When picking an oil-immersed transformer, keep three key things in mind:
·Load type: For fluctuating loads (like in manufacturing plants), choose on-load voltage regulation. For stable loads (like in residential areas), the 50-2500kVA/10kV Super Low-loss Oil Immersed Transformer is your best choice.
·Environment: In humid or coastal areas, choose models with sealed tanks and anti-corrosion coatings to last longer. LVMA's products are designed to stand up to different environmental conditions across our global markets.
·Standards: Make sure the transformer meets IEC, IEEE, or local standards. All three featured models have international certifications-something LVMA guarantees as an ISO 9001 certified manufacturer with a reputation for global reliability.
In short, oil-immersed transformer models are like a "technical language" that tells you about performance and usage. Whether you need the versatile 50-2500kVA/35kV Oil Immersed Double Winding Transformer, the high-capacity 3150-20000kVA/35kV Oil Immersed Power Transformer, or the efficient 50-2500kVA/10kV Super Low-loss Oil Immersed Transformer, understanding their specs helps you design and run power systems better. With LVMA's 17 years of experience, technical expertise led by industry veteran Mr. Ye Jinfei, and global reach, these transformers deliver reliable, tailored performance for different industry needs-strengthened by intelligent solutions and a commitment to sustainability.