Where are OSTL's transformers made?
At OSTL's transformer manufacturing unit in Howrah, West Bengal. Radiators are made in-house at Sankrail, Howrah, from 2026.
FOCUS REGION · WEST BENGAL
Transformer manufacturer for West Bengal
OSTL is a West Bengal manufacturer. Our transformer unit and our in-house radiator unit (Sankrail, from 2026) are both in Howrah district, and our office is in central Kolkata.
What OSTL offers West Bengal
- Manufacturing in Howrah district, with in-house radiator manufacturing at Sankrail from 2026
- Office in Kolkata for meetings, drawings and commercial discussions
- Distribution transformers to BIS IS 1180; routine tests per IS 1180 / IS 2026
- Suitable for industrial units, commercial buildings, housing projects and EPC contractors across Kolkata, Howrah, Hooghly, North and South 24 Parganas, Durgapur, Asansol, Kharagpur, Haldia and Siliguri
Explore our power, distribution and dry-type transformers, our quality and testing approach and our facilities.
To get a quotation, share
- kVA / MVA rating and type (oil-filled or dry-type)
- Primary and secondary voltage
- Quantity
- Site location (district)
- Required-by date, and a tender specification if you have one
Can I visit or meet OSTL in Kolkata?
Yes. The office is at Chatterjee International Centre, 33A Jawaharlal Nehru Road, Kolkata 700071. Call +91 93310 15264 to fix a time.
What range does OSTL manufacture?
OSTL, established in 2007, manufactures power and distribution transformers up to 10 MVA and 66 kV, and dry-type transformers up to 3 MVA.
OSTL supplies customers worldwide. Focus regions: Odisha · Bihar · Jharkhand · Assam, Sikkim & North-East India · Andaman & Nicobar Islands · Nepal · Bhutan · Bangladesh. Enquiries from any other state or country are equally welcome; see where we supply.
Prepare your transformer enquiry
Discuss the specification on the relevant product page: power transformers, distribution transformers or dry-type transformers. Use the quotation checklist for your technical and delivery brief.
For your project type, see industry/application guides. Procurement teams can also review tender documents, BIS scope and vendor-status questions.
LET’S TALK ABOUT YOUR PROJECT
Have a project-specific
question?
Send your technical brief, and start a direct conversation with OSTL.