80 kVA Oil-Immersed Distribution Transformer – 10 kV | China Manufacturer & Supplier
Zhongxin General is a China-based manufacturer, factory and supplier of 80 kVA three-phase outdoor oil-immersed distribution transformers — stepping 10 kV down to 400 V with Dyn11 vector group and ONAN cooling. Compliant with GB 1094 (Grade 1/2/3) and IEC 60076, and meeting EU Commission Regulation No. 548/2014 Tier 1 and Tier 2 energy efficiency requirements. Available at 50 Hz or 60 Hz for domestic and international distribution projects.
Modular Smart Substation for Yichuan LNG Energy Project — Yan’an, Shaanxi
Zhongxin General delivered four prefabricated smart substation modules to an LNG energy project in Yichuan County, Yan’an, Shaanxi — dispatched November 10, 2025, two weeks ahead of the contractual deadline. The modular four-unit architecture (35kV switchgear, 10kV switchgear, secondary equipment, reactive power compensation) dramatically reduced on-site construction time and civil works costs. The main transformer is an SZ20-16000/35 OLTC unit — 16,000 kVA, 35kV/10kV — meeting GB 20052-2024 Grade 2 and EU 548/2014 Tier 2 energy efficiency standards. SCADA confirmed normal operation on April 26, 2026.
Live Transformer Replacement Using Mobile Box Type Substations: How China’s Utilities Achieve Zero Downtime
China’s grid operators have quietly mastered a technique that eliminates the traditional 4–6 hour blackout when replacing a distribution transformer. Using a mobile box-type substation as a temporary bypass supply, crews can swap out an old unit while connected customers experience zero interruption. This article explains the method, the specialist vehicles involved, and documents five real-world cases carried out across China between 2020 and 2026.
3× Prefabricated Box-Type Substations Delivered to PetroChina Luntai Project — Tarim Oilfield, Xinjiang
On April 17, 2026, Zhongxin General dispatched three prefabricated box-type substations to PetroChina’s Luntai County project in Xinjiang — serving the Tarim oilfield core zone for oilfield production expansion, photovoltaic grid connection, and industrial load supply. Each unit contains a 2500kVA SCB14 Grade 2 dry-type transformer (10kV/0.4kV) and a 2500kVA Grade 2 oil-immersed transformer (35kV/10kV), with IP54 protection, seismic Grade 9 design, and -30°C to +55°C operating range for Xinjiang’s desert environment.
5000kVA 33kV Hydropower Station Transformer Exported to Nepal — Chino Hydropower Project
On April 17, 2026, Zhongxin General dispatched two S-5000/33GY oil-immersed step-up transformers (5,000 kVA, 33kV/6.3kV, YNd11, ONAN) and a complete switchgear package to Nepal’s Chino Hydropower Station — a 7.9 MW run-of-river project in Manang District, Gandaki Province, with annual generation capacity of 44.38 GWh. Shipped overland with an estimated six-day transit to the China-Nepal border crossing. Full technical specifications, factory acceptance testing, and dispatch photos included.
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.