CORPORATE OFFICE
ABOUT OSTL
An established name.
A sharper focus.
Power and distribution transformers up to 10 MVA and 66 kV; dry-type transformers up to 3 MVA. Manufacturing since 2007.
Discover OSTLOur Howrah works
OM SHAKTI TRANSFORMERS LIMITEDManufacturing since 2007.
WHO WE ARE
Focused on transformers.
Clear on the essentials.
Om Shakti Transformers Limited (OSTL) manufactures power and distribution transformers.
Established in 2007, our overall manufacturing range extends up to 10 MVA and 66 kV.
Start with the rating, voltage and quantity your project needs. Contact our Kolkata office to discuss the specification and request a quotation.
Explore the range
BIS licensed in five major transformer categories.
Winding materials: copper and aluminium; project-specific selection is confirmed on enquiry.
OUR FACILITIES
Our facilities.
Across Kolkata & Howrah.
Total manufacturing area: over 20,000 sq ft.
Our corporate office and manufacturing units across Kolkata and Howrah.
TRANSFORMER MANUFACTURING
Howrah, West Bengal
Our transformer manufacturing unit.
EXPANSION IN 2026
Sankrail, Howrah
Expanded into in-house radiator manufacturing in 2026.
KOLKATA CORPORATE OFFICE
Our Kolkata corporate officeReception at our corporate office, the first point of contact for enquiries, quotations and dispatch coordination.Visit or contact the office ↗OUR JOURNEY
Milestones along the way.
From incorporation to expanded in-house manufacturing.
- 2007
Founded and incorporated.
- 2020
BIS licences acquired in all five major transformer categories.
- 2021
Supplied a 5 MVA power transformer to a leading power utility in Odisha.
- 2024
Supplied transformers to SAIL for the Durgapur Township Project.
- 2025
Felicitated by SAIL for performance and contribution.
- 2026
Supplied a 1250 kVA dry-type transformer to a university in West Bengal.
- 2026
Supplied 3 MVA and 1.5 MVA transformers for a major polymer manufacturing project in Kharagpur.
- 2026
Commissioned in-house radiator manufacturing facility at Sankrail with capacity expansion.
RECOGNITION · 2025
Recognised for performance.
And contribution.
A felicitation by SAIL — Steel Authority of India Ltd. — at the IIMM Vendor Meet.
THE OCCASIONIIMM Vendor Meet
Felicitation for performance and contribution, 2025.
Real event photographs from the IIMM Vendor Meet, 2025.
CERTIFICATIONS
Certified systems. Licensed products.
OSTL is ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certified, and BIS licensed in all five major transformer categories since 2020. Copies available on request.
BIS
Product certification
BIS licensed
Licensed by the Bureau of Indian Standards in all five major transformer categories since 2020 (IS 1180 distribution transformers).
Licence copies available on request.
Management system
ISO 9001:2015
Quality management system
Certificate no. 10193-QMS-1193
Management system
ISO 14001:2015
Environmental management system
Certificate no. 10208-EMS-1208
Management system
ISO 45001:2018
Occupational health & safety management system
Certificate no. 10221-OHSMS-1221
Certificates issued by Bluestar Management Systems Pvt. Ltd. (UAF accredited) for the manufacture and supply of oil-cooled three-phase transformers. Copies available on request.
THE OSTL APPROACH
The detail makes
the difference.
A focused manufacturing range. A standards-led testing framework. A clear starting point for your enquiry.
A defined range
Power and distribution transformers up to 10 MVA and 66 kV; dry-type transformers up to 3 MVA.
A standards-led approach
Routine tests per IS 1180 / IS 2026. Include any project-specific testing requirements in your enquiry.
A direct conversation
Connect with OSTL to discuss specifications, quotations and dispatch requirements.
START WITH THE BRIEF
Your requirement.
A clear next step.
Give us the technical and delivery details. We can then discuss the configuration and quotation for your project.
Share the specification
Rating, voltage, quantity and any supporting technical requirements.
Discuss the configuration
Confirm the project requirements with OSTL.
Request a quotation
Discuss commercial details and your requested dispatch timeline.
THE REAL PICTURE
Inside the making.
A closer view of the factory and transformer assemblies from OSTL’s own photographs.
Our Howrah works
Real photographs from our Howrah works, lightly retouched. Machinery and layout retained; originals preserved.
REGISTERED COMPANYOm Shakti Transformers Limited
CIN: U31102WB2007PLC114331
LET’S TALK ABOUT YOUR PROJECT
A clear specification.
A better conversation.
Share your rating, voltage, quantity and requested dispatch timeline.