Our oil-immersed transformers deliver outstanding performance in both stability and reliability, as well as energy efficiency.
Oil-immersed transformers are the product with which our transformer business founder, Mr. Li Xianming, first became acquainted at the age of 16, when he began his apprenticeship at a state-owned transformer factory. Our oil-immersed transformer products embody the core values of reliability and soundness that Mr. Li upheld consistently throughout his long career in state-owned enterprises — from apprentice, to technician, to Chief Engineer.
Equally, the design, management, and production team assembled under the leadership of Deputy General Manager and Chief Engineer Mr. Li Xianming comprises exclusively seasoned industry professionals, providing a solid guarantee of consistent product quality and reliability.
Our oil-immersed transformer range covers on-load tap-changing and off-load tap-changing power transformers, as well as distribution transformers, rated at 132 kV / 63 MVA (63,000 kVA) and below. Our S22 series oil-immersed transformers achieve energy efficiency levels that surpass the EU Tier 2 efficiency requirements implemented in 2019, as set out in Commission Regulation (EU) No. 548/2014 of 21 May 2014. Our S22 Series Oil Immersed Transformer meets and These products are widely used across a broad spectrum of applications, including:
Zhongxin General exported a SZ13-8000/120 on-load tap-changing power transformer — 8,000 kVA, 120kV class, 27.8 tonnes total weight — to a power station project in the Democratic Republic of Congo. Independent quality inspection was personally overseen by a
Zhongxin General delivered a SZ20-31500/35 on-load tap-changing transformer for Jing Teng Energy Co., Ltd.’s new dedicated 35kV substation at their Alar City, Xinjiang industrial production base. Rated at 31,500 kVA with a 7-position OLTC providing ±7.5% on-load voltage
When a large-scale data center project in Xinjiang’s Altay Region needed high-capacity power distribution infrastructure, Zhongxin General (ZX Transformer) was selected to supply a batch of S11-6300kVA/36.5kV oil-immersed transformers — a RMB 20M+ contract delivered on schedule in
Five years of success: Our EV charging station powered by Sichuan Zhongxin box-type substation generates $10,000 monthly profit serving heavy-duty trucks. Spring Festival 2026 ground upgrade with heavy reinforcement ensures another decade of reliable operation. Real-world proof of
March 12, 2025 – When our European client’s supervising engineer arrived at the factory, his first words changed everything: “We need to talk about standards.” What followed was a 27-day journey of manufacturing a 1250kVA, 10.5kV/0.42kV cast resin
Zhongxin General delivered a 63 MVA / 110 kV oil-immersed OLTC transformer to Ningxia Helium Technology Co., Ltd.’s LNG and high-purity helium production facility in July 2025. The unit steps 110 kV grid supply down to 10.5 kV
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