Marsons Limited is a multi product and service organization engaged in manufacturing, supplying, erecting, testing and commissioning of Power and Distribution transformers with incredible distinction and credibility over the past 60 years. Owing to adherence to International Quality norms and prompt Customer Service, Marsons has developed an excellent brand image and is an ISO 9001:2008 certified Company. Currently, we manufacture Distribution & Power Transformers ranging from 10 KVA to 160 MVA 220 kV class Furnace Transformers, Dry Type Transformers and various types of Special Application Transformers. Furthermore, a new facility to enhance our manufacturing capability to manufacture EHV Power Transformers upto 315 MVA 400 kV class is in the pipeline.


Our main unit located in Kolkata is spread over an area of 35,000 sq. m. We are among the first to set up Impulse Test Laboratory and Autocalve (Vacuum Heating System) way back in 1995-96. Our Impulse Laboratory is equipped with 1600 kV 80 KJ Impulse Generator imported from Haefely Trench of Switzerland, the world leaders.


Our expertise encompasses Design, Development, Manufacture and Testing of Power and Distribution Transformers. Our Transformers of various ratings, which includes 150 MVA 220 kV class have been successfully type tested by reputed laboratories such as CPRI and ERDA.

Marsons is synonymous with highest quality, innovation, reliability and workmanship

About Company



Marsons foundations have been established by powerful and pragmatic principles backed up by hard-core commitment for excellence.They have been inculcated by all and practiced daily, enabling us to progress both vertically and horizontally.Key features that drive us ahead are: In sum we believe that Marsons should be synonymous with the highest quality, Innovation, reliability and workmanship.

  • Passion for growth and striving for excellence.
  • Spirit of ambition and healthy competition.
  • Uncompromising quality and commitment to achieve complete customer satisfaction
  • Recognition of Marsons as a powerful global brand.

Mission & Vision

Vision : To establish Marsons as a global brand and one of the most trusted names in transformers.

Mission : Through Quality Assurance and stringent evaluations, provide our customers with quality products with affordable prices and consistency in services. Develop and maintain suppliers/customers relationship based on open communication, mutual trust and respect.


Historical Milestones

  1. The first SSI company to install the Impulse Testing Laboratory and Autoclave (Vacuum Heating System) way back in 1995-96.
  2. The only plant in NER to manufacture EHV Power Transformers up to 22 kV class.
  3. The largest manufacturer of Eastern India including NER.
  4. We have over 300,000 Transformers in service across the globe.
  5. NABL accredited Impulse Testing Lab with Impulse Generator of 1600 kV 80 KJ.

Quality Policy

Quality policy is a reflection of the endeavors and aims of the organization.

“Our policy is to manufacture and supply trouble free products in conformance to specification for the satisfaction of our customers. We commit to increase productivity and sales volume and to ensure continualimprovement of system, timely delivery of specified quality products and services, at competitive prices, including compliance to product, health, safety and environmental legal & statutory, regulatory and other requirements in a manner that prevents environmental pollution, ill health of the employees-society.We shall set measurable targets for appropriate parameters and shall continually monitor them.”

Our Skilled Team

Our team is currently more than 500 people strong and dedicated to creating quality and sustainable power solutions for our customers. Right from fresh and dynamic engineers to experienced professionals who have spent several decades in the industry, our team represents the synergy of the old and new. We recognize and value experiential learning as a means of attaining knowledge and experience; Marsons as an organization has constantly placed an immense focus on the benefits of innovative learning and implementation techniques, our dedicated team of bright and inquisitive engineers who form a part of our R&D team work relentlessly in the pursuit of innovation and excellence.


At the same time, we continue to benefit from the knowledge, guidance and experience some of the most experienced professionals of our industry who have led in the growth of the Indian power sector and who provide us the vision to constantly break new ground and build newer competencies.