How Chongqing Won the Three Gorges Large Transformer Project: A First-Hand Account
In 1993, China’s decision to build the Three Gorges Dam triggered an unexpected competition: which city would manufacture the world’s largest power transformers — units weighing 400 tonnes each, at a voltage class no Chinese factory had ever achieved? This is the first-hand account of how Chongqing won that contest, told by the municipal planning official who led the effort.
From a Street Repair Shop to the World‘s UHV Transformer Leader: The TBEA Story
In 1988, a 26-year-old technician took over a debt-ridden street transformer repair shop in Xinjiang with 53 employees and no hope. Today, that company is TBEA — the world’s largest transformer manufacturer by capacity and the only one with mass production capability of ±1100kV UHV DC technology. This is the amazing story of how one man’s choice and a series of bold acquisitions built China’s transformer champion.
16,000 kVA OLTC Oil Immersed Transformer 35kV/10.5kV
On April 11, 2026, Zhongxin General completed delivery of one 16,000 kVA on-load tap-changing oil-immersed transformer to a dedicated 35kV industrial zone substation. This unit will serve as the main step-down transformer for the entire zone, taking dedicated 35kV incoming power and stepping it down to 10.5kV for zone-wide distribution. This case study documents the complete production process from core stacking through factory acceptance testing to dispatch
22 KYN28-12 HV Switchgear + 2 SCB18 Dry-Type Transformers Shipped to Zigong City for CATL Supply Chain Project
On the early evening of April 1, 2026, Zhongxin General dispatched 22 KYN28-12 10kV switchgear panels and 2 SCB18-1600/10.5 cast resin dry-type transformers (5.69% impedance, 3,430 kg each, Dyn11) to Sichuan Ruibai New Energy Materials Co., Ltd. in Zigong, Sichuan — a front-end supplier to CATL’s battery supply chain. The transformers meet GB 20052-2024 Tier 1 efficiency standards. Full technical specifications and project documentation.
Custom Prefabricated Modular Substation for Aktau Port, Kazakhstan — A Belt & Road Power Infrastructure Case Study
Zhongxin General engineered a purpose-built 2×800 kVA prefabricated modular substation for Kazakhstan’s Aktau container port — a Belt & Road flagship hub on the Caspian Sea. The 15 m × 10.5 m × 3.7 m unit was split into 5 factory-complete transport modules and delivered 4,500 km overland via Horgos, featuring 14-unit KYN28-12 switchgear, own-manufactured ZHONGXIN GENERAL dry-type transformers, and a climate-adaptive environmental control system engineered for Aktau’s harsh coastal conditions.
When Your Transformer Doesn’t Fit the Ship: A Real Lesson in Large Equipment Export Logistics from China
A real account of what happened when the allocated vessel space at Shanghai Port could not accommodate an 8,000 kVA 120kV OLTC transformer main tank during export to a DR Congo power station project — the rerouting to Lianyungang Port, the two-and-a-half-month delay, and the practical lessons learned. Written for international buyers and EPC procurement teams planning to source large power transformers from China. Includes recommendations on vessel space booking, port selection for heavy-lift cargo, nitrogen transport verification, and split shipment planning.
8000kVA 120kV OLTC Power Transformer Exported to DR Congo — Full Project Case Study
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 former General Manager of Chint Electric’s transformer division. The shipment navigated a real-world logistics challenge when vessel space constraints at the original port required rerouting via Lianyungang. The unit arrived at Mtwara Port, Tanzania on February 4, 2026, with package condition verified as no damage. Switchgear supplied as part of the complete package.
From ZX TRANSFORMER to ZHONGXIN GENERAL: Our Brand Has a New Name
Effective March 2026, Sichuan Zhongxin General Electric Energy Co., Ltd. has officially rebranded its international identity from ZX TRANSFORMER to ZHONGXIN GENERAL — aligning with our product nameplate identity and reflecting an expanded portfolio that now spans transformers, switchgear, prefabricated substations, energy storage, and EV charging infrastructure. Our website, legal entity, products, team, and certifications remain unchanged.
31,500 kVA OLTC Transformer Powers New 35kV Substation for Alar Jing Teng Energy — Xinjiang
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 regulation, this unit was delivered January 12, 2026 and confirmed in full operation by March 2026. This case study covers the complete project lifecycle: factory manufacturing, delivery, on-site installation, and commissioned operation. Also available in 33kV, 34.5kV and 36kV for international substation projects.