Manufacturing in Howrah. Enquiries through Kolkata.
Om Shakti Transformers Limited has manufactured transformers since 2007. The manufacturing units are Unit 1, Howrah, West Bengal and Unit 2, Sankrail, Howrah. In-house radiator manufacturing has been a company capability since 2026. Across manufacturing, the total area is over 20,000 sq ft.
These are facility facts, not a statement of annual output, a promise of immediate capacity or a specification for every transformer. Discuss the required configuration and requested dispatch timeline with OSTL before planning a project.
OSTL’s manufacturing units in Howrah
- Unit 1, Howrah, West Bengal: one of OSTL’s manufacturing units.
- Unit 2, Sankrail, Howrah: one of OSTL’s manufacturing units.
- Over 20,000 sq ft: total manufacturing area.
- Kolkata: corporate office and the point of contact for enquiries.
See the manufacturing overview and build sequence for the broader production context. Site access and any document or inspection requirements should be discussed in advance; this page is not a walk-in visitor invitation.
A specification-led transformer range
Enquire about power and distribution transformers up to 10 MVA and up to 66 kV, or dry-type transformers up to 3 MVA. These ceilings do not establish every possible combination as a standard design. Copper and aluminium windings are confirmed; the proposed construction is agreed against the project.
OSTL has held BIS licences in all five major transformer categories since 2020. Ask for the licence scope relevant to your enquiry. OSTL is ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certified; copies available on request. See quality and testing for the enquiry context.
Kolkata office: the contact address
8th Floor, Room A12, Kolkata 700071, West Bengal, India.
+91 70035 13107 · WhatsApp
Landline: 033 4061 3200
ostltd@hotmail.com
For an enquiry, include the rating, HV/LV voltages, quantity, site location and requested dispatch timeline. Contact the office, review the quotation checklist, or return to the West Bengal page.
Process duties and wider equipment enquiries
OSTL’s confirmed range includes arc, induction and ladle furnace transformers, rectifier/converter duty transformers and solar/inverter duty transformers. See the product range or industries supplied. Manufacturing capabilities are described at company level, not assigned to a particular unit.
From a Howrah manufacturing enquiry to a comparable offer
For a plant, building or campus, distinguish power, distribution and dry-type duties before comparing offers. Furnace and converter-duty enquiries need the process specification; solar/inverter duty needs the electrical interface brief.
Use the 500 kVA and 1000 kVA / 1 MVA guides for quotation inputs, not fixed prices. Send rating, voltages, loss requirement, quantity, destination and the purchaser’s schedule. Review industry buying questions and the RFQ checklist.
For repair and after-sales support, describe the equipment and issue so scope and terms can be agreed. Factory access, an inspection or a visit should be coordinated with the Kolkata office; no unarranged visit or dispatch promise is implied.