Electrical transformers have become integral to our daily lives in the modern world. In 2024, the market size exceeded 60 billion USD and is anticipated to continue growing over the next decade.


This article explores the top power transformer manufacturers worldwide, providing insights into the most powerful transformers. Additionally, it offers a brief guide on selecting a power transformer manufacturer. The article also introduces transformer manufacturers, transformer suppliers, and other transformer producers.


General Electric


General Electric (GE) stands at the forefront of the list of transformer manufacturers, boasting an annual revenue of approximately $100 billion. As a multinational company based in the United States, GE has maintained its stellar reputation in the manufacturing of electrical equipment. Founded by the renowned inventor Edison, GE is a prominent name in the power, renewable energy, and aerospace industries, enjoying widespread recognition as a leader in the global power equipment sector.


With a history dating back to the pioneering of the power grid in 1882, GE has consistently expanded through continuous innovation in new product development. GE's power portfolio encompasses high voltage/medium voltage (HV/MV) equipment and grid automation. 


Siemens 


Following closely with an impressive annual revenue surpassing $90 billion, Siemens takes its place as a multinational German company and stands among the foremost transformer manufacturers in Europe. Renowned for its extensive service across diverse industries, Siemens has established itself as a prominent player in the global transformer manufacturing landscape.
Siemens' transformer portfolio is comprehensive, featuring traction transformers, high-voltage direct current (HVDC) transformers, Geafon cast resin transformers, and oil-immersed distribution transformers. Siemens distinguishes itself not merely as one of many electric transformer manufacturers but as a company with a broad business scope, spanning industries such as infrastructure, transportation, healthcare, and more.

 

 


Hitachi Energy 


ABB Ltd, the first Swedish Swiss entity on the list, is a multinational transformer manufacturer capable of generating $28 billion in annual revenue. So in 2022, Hitachi Energy bought out all the share market of ABB’s Transformer side. 


The company provides a comprehensive range of transformers, including dry-type and liquid-filled transformers, isolation transformers, and control transformers. In addition to being a transformer producer, Hitachi Energy - ABB Ltd is a frontrunner in modern electricity generation, automation, and various digital solutions.

 


Daelim Transformer


Daelim Transformer, a leading manufacturer and supplier, holds numerous UL certifications. With the high voltage up to 230kV and ratings up to 270 MVA. Daelim Transformer focuses on North America, South America, and Australia, it meets global standards and offers fast delivery and localized after-sales services. Specializing in electric transformers, its range includes distribution, HV power, and cast resin transformers, serving diverse industries like renewable energy, mining, data centers, BESS, EV charging and utilities.


Mitsubishi Electric


Ranked third is Mitsubishi Electric, a Japanese multinational company boasting an annual revenue exceeding $40 billion, placing them among the foremost transformer manufacturers in Asia and globally.


Mitsubishi Electric's product portfolio comprises generator step-up transformers, autotransformers, and gas-insulated transformers. Beyond these offerings, they specialize in high-voltage switchgear, protection and supervisory systems, energy management and network control systems, high-voltage direct current (HVDC), information and communication technology (ICT), and various engineering solutions. Their diverse range of products and solutions solidifies their standing as a comprehensive provider in the electrical equipment sector.


Toshiba


Toshiba, another leading Japanese multinational transformer manufacturer, maintains sales offices in approximately thirty-five countries worldwide, contributing to an impressive annual revenue exceeding $30 billion.
Toshiba's product portfolio includes oil-filled power transformers, corrugated tank distribution transformers, Completely Self-Protected Transformers (CSP), and dry-type cast resin transformers, all falling under the umbrella of the energy system. Beyond the energy sector, Toshiba offers a diverse range of products applicable in various industrial and commercial domains.


Schneider Electric


Schneider Electric, holding the fifth position, is a prominent European multinational company headquartered in France. With annual revenues reaching $25 billion, a significant portion is generated from the US market.


The extensive product catalog of Schneider Electric encompasses switchgear, medium voltage transformers, energy management software, energy monitoring systems, substation automation, and various other offerings. The company is at the forefront of energy management and digital transformation.


Hyundai Heavy Industries


Another prominent transformer manufacturing company in Asia, boasting approximately $13 billion in annual revenues, is this Korean multinational that has garnered recognition for producing high-quality products through the use of cutting-edge technology.
The company specializes in offering top-of-the-line transformers, including other special types tailored to meet the specific needs of its customers.


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