Global Transformer Production: China Holds 60%+ Capacity, India Accelerates Catch-Up

Core assessment: Global transformer production is undergoing a structural restructuring. China firmly holds the position as the world's largest manufacturing base with over 60% of global capacity, but India is expanding capacity at a record pace, seeking a larger share in the 2026-2030 electricity super-cycle. For practitioners tracking transformer production companies, the transformer production process, or transformer production lines, understanding this supply-side geopolitical landscape is more critical than tracking short-term order data.

Global Transformer Production Landscape: China Dominates, India Catches Up

Transformer production is a highly concentrated industry. According to data from AskCI Consulting, China's transformer capacity accounts for over 60% of the global total, with annual output of approximately 3 billion kVA and output value exceeding 300 billion RMB. In 2026, China's total transformer output is projected to reach 2.274 billion kVA, continuing to grow from 2.106 billion kVA in 2025.

This dominant position is no accident. China possesses a complete upstream supply chain from copper materials and grain-oriented silicon steel to insulation materials, enabling transformer production companies to complete raw material procurement within a radius of a few hundred kilometers. Take copper as an example: copper materials account for approximately 30% of transformer production costs, and leading enterprises such as TBEA lock in cost volatility through hedging and long-term agreement procurement.

But India is accelerating. In July 2026, Indian transformer manufacturers showed unusual calm regarding competition from China. Satyen Mamtora, CEO of Transformers & Rectifiers (India) Ltd, stated: "We have a healthy order book of 76 billion rupees, providing about 30 months of visibility, and we do not believe business will be materially affected." Meanwhile, the Indian government, through public procurement orders, requires winning Chinese enterprises to manufacture locally in India, with 50-60% of procurement content required to be domestic.

In September 2026, CG Power commissioned India's largest single power transformer manufacturing plant in Sehore, Madhya Pradesh. The 50-acre facility is designed for 220kV to 1200kV class power transformers, with a monthly capacity of 35 units. CG Chairman Vellayan Subbiah said at the first transformer rollout ceremony: "This plant is designed to produce the world's largest power transformers, not only meeting India's needs but also supporting exports."

Core Stages of the Transformer Production Process

Understanding the competitiveness of transformer production companies requires examining their manufacturing processes. Taking epoxy resin cast dry-type transformers as an example, a typical production line includes the following key stages:

Drawing design and customization. Customized design is carried out according to order technical parameters, specifications, and performance requirements to ensure products comply with national standards or customer-specific usage environment requirements.

Winding and foil winding. Low-voltage coils are formed by winding copper conductors and insulation materials using a winding machine; high-voltage coils use a foil winding machine, passing copper foil through a pressing device and shearing blade, welding copper bars, and winding according to specified turns, then wrapping outer insulation and heat-baking at 130°C.

Vacuum casting. This is the core stage of dry-type transformer production. Epoxy resin is processed in a casting tank at a vacuum level below 200Pa. Pre-baked molds are placed in the tank, maintained under vacuum for 2 hours, then the discharge valve is opened for casting. After completion, vacuum is maintained for half an hour, then pressure is applied to 2kg for half an hour.

Curing and demolding. Cast coils are pushed into a curing oven for curing according to a specific curve, then inner and outer molds are removed, flash is trimmed, and they enter the semi-finished goods warehouse.

Assembly and testing. Iron cores, coils, and insulation components are assembled according to drawings, and factory tests are completed. Quality control at this stage directly determines the final reliability of the transformer.

Digital Production Lines Become the Competitive Watershed

In 2026, the intelligence level of transformer production lines is becoming a key indicator distinguishing leading enterprises from small and medium-sized manufacturers.

The JInpan Technology Wuhan high-end dry-type transformer digital factory provides a benchmark case. In August 2026, the factory set a record of 900 units produced in a single month, with capacity exceeding 2 million kVA. The core lies in "AI intelligent scheduling systems and real-time data-driven industrial internet platforms": the iron core workshop eliminates equipment idle losses through OEE data analysis; the electromagnetic wire workshop achieves doubled extrusion capacity through adaptive process parameter control; the casting workshop connects the entire process through an intelligent logistics scheduling system.

Based on this capacity foundation, JInpan Technology's newly signed sales orders in the first half of 2026 reached 7.493 billion RMB, a year-over-year increase of 69.31%; as of the end of the second quarter, total orders in hand reached 10.697 billion RMB, a record high.

Shandong Huachi Transformer represents the "intelligent transformation and digital conversion" path of traditional enterprises. The company produces 26 million kVA of various energy-saving transformers annually. Through building intelligent production lines and a full-process testing center, it has achieved full-process digital management from silicon steel sheet feeding to finished product testing.

Supply Gap and the "Long Shortage" Cycle

The capacity expansion of global transformer production companies is driven by a structural supply gap. Energy consultancy Wood Mackenzie estimates that the current global power transformer supply gap is as high as 30%, with distribution transformer gaps at approximately 10%. Citigroup research analysts predict that the global power transformer supply shortage will last at least until 2029.

The root of this gap lies in the mismatch between supply and demand rhythms. Bruno Melles, global CEO of Hitachi Energy's transformer business, pointed out: "Data centers generally require completion within 3 years, while building a new transformer factory often takes 4-5 years." This means that even if all current expansion plans land, capacity release lags behind demand explosion.

Chinese transformer production companies are filling this gap. In 2025, China's transformer export value reached 64.634 billion RMB, a year-over-year increase of 35.6%, a record high. In January-February 2026, export value reached 17.783 billion RMB, up 35.7% year-over-year. IndexBox analysis shows that China's transformer exports mainly flow to Southeast Asia, Africa, the Middle East, and Latin America, with price competitiveness particularly prominent in the distribution transformer segment—typically 15-25% lower than European and American suppliers.

Practical Advice for Buyers and Industry Observers

For buyers evaluating transformer production companies: Do not base decisions solely on quotations. Copper and grain-oriented silicon steel together account for 50-65% of transformer material costs, and raw material price volatility directly affects delivery reliability. Prioritize suppliers with hedging mechanisms for bulk raw materials and digital scheduling capabilities.

For technical personnel tracking the transformer production process: Vacuum holding time during vacuum casting and curing curves are decisive variables in dry-type transformer quality. When visiting factories, request to see vacuum level records of casting equipment and temperature curve logs of curing ovens—these reflect actual manufacturing levels better than any certification.

For analysts tracking the industrial landscape: The pattern of China's capacity share exceeding 60% is difficult to change in the short term, but India's capacity expansion speed and policy protection intensity deserve continuous attention. The 13-14 month construction cycle of CG Power's Sehore plant indicates that India is compressing capacity landing time. If this model is replicated by other Indian transformer production companies, the global supply landscape could see substantive changes in 2028-2030.