Products Description
Our edge comes from refined craftsmanship, smart management, and top-tier equipment-CNC core cutting lines, silicon steel slitting machines, vacuum drying, and impregnation gear that elevate product reliability.
Our S13-1000kVA 20kV/433V three-phase oil immersed transformer is more than a 1000 kva transformer (trafo 1000 kva). It's a high-performance oil cooled and distribution transformer, sharing the quality of our 1000 kva oil filled transformer and 1000 kva 11kv 433v transformer series.

We spare no effort on quality: only high-grade silicon steel sheets make the cut, and every unit is built by veteran workers with years of hands-on experience. Before leaving the factory, each transformer goes through rigorous testing-no shortcuts, no compromises. From careful packaging to on-time delivery, we're with you every step of the way, delivering the kind of quality and service that industrial clients and power grid projects can count on.







case
In May 2023, a customer named Gol from Azerbaijan contacted us through our website. He expressed strong interest in purchasing 20kV-level oil-filled transformers, specifically a 1000kVA oil-filled transformer and some oil-filled distribution transformers.
Our international sales manager, Mike, promptly responded to his inquiry, providing detailed product information and quotations. He explained the features and advantages of our transformers, highlighting their high quality, reliability, and energy efficiency. During the process, Gol mentioned his excitement about visiting our factory area, noting that he had seen on international channels that Lishui, Zhejiang, is a very beautiful place. We also shared customer testimonials and successful case studies to showcase our strong track record in the industry.
After several rounds of communication and negotiation, Gol was very satisfied with our products and services. He decided to place an order and expressed confidence in a long-term partnership.
This successful interaction not only strengthened our business relationship but also demonstrated our ability to meet the diverse needs of international customers and provide top-notch solutions in the power equipment industry.
FAQ
Q: What are the main features of the S11 grade 20kV oil-immersed distribution transformer?
Low Losses: Utilizes high-quality silicon steel core and advanced manufacturing processes to significantly reduce no-load and load losses, thereby improving energy efficiency.
Low Noise: High-quality manufacturing techniques and materials effectively reduce operational noise, enhancing the operating environment.
Strong Short-Circuit Resistance: Possesses good short-circuit tolerance, allowing it to operate stably under short-circuit conditions and reducing the risk of damage.
Excellent Insulation Performance: Uses materials and designs with high insulation ratings to ensure the transformer's safety and reliability.
Easy Maintenance: Features a well-designed structure that simplifies maintenance and inspection.
In the S11(M)R series, the "R" indicates that the core uses a wound core made of high-quality low-loss cold-rolled silicon steel sheets. This design eliminates the need for punching and trimming, removing traditional core's horizontal and vertical joints. As a result, it achieves lower no-load current and reduced reactive power loss. Additionally, it results in a lower noise level, making the transformer more environmentally friendly. The integral core design, with clamping pieces primarily tightening the coils, further enhances the coil's short-circuit current resistance.



