Since 2007. Manufacturing in Howrah.
OSTL was established in 2007. Our manufacturing units are in Howrah, with the corporate office in Kolkata.
Meet the facilities ↗
OM SHAKTI TRANSFORMERS LIMITED
MANUFACTURING SINCE 2007
Power & Distribution Transformer Manufacturer in Kolkata
Powering your next project.
Power and distribution transformers
up to 10 MVA and 66 kV.
Dry-type transformers up to 3 MVA.
THE OSTL RANGEPower. Distribution. Dry type.
Specifications start with your project.
OUR PRODUCT RANGE
Power, process & site.
Explore our range.
Explore all eight product ranges. Swipe or use the arrows to find the right starting point.
Power Transformers
Project-specific transformation for higher-capacity power systems.
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Distribution Transformers
Voltage transformation for network and site distribution.
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Dry-Type Transformers
Air-cooled transformer options for indoor electrical spaces.
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Compact Substations
Coordinated electrical equipment in a compact substation.
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Furnace Transformers
Process-duty transformers for arc, induction and ladle applications.
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Rectifier / Converter Duty Transformers
Transformer interfaces for rectifier and converter systems.
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Solar / Inverter Duty Transformers
Transformer interfaces for solar plants and inverter systems.
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LT / Control Panels
Distribution and control panels for project-specific electrical needs.
Explore productINDUSTRIES WE SERVE
Different industries.
A project-led approach.
Explore the electrical requirements behind your sector. Start with the duty, the site and the right equipment.
WHY OSTL
Kolkata enquiries.
Howrah manufacturing.
A Kolkata corporate office and manufacturing units in Howrah: Unit 1, Howrah, West Bengal and Unit 2, Sankrail, Howrah. Start a project-specific conversation with OSTL, established in 2007.
Specifications start with your project.
Start with the duty, required rating, voltages and site conditions. The proposed design and supply scope are confirmed for the particular enquiry.
Prepare the technical brief ↗BIS and ISO documentation.
BIS licensed in five major transformer categories since 2020. ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certified; copies available on request.
View certificate copies ↗Repairs and after-sales service.
Discuss your transformer repair or after-sales requirement with OSTL. Share the equipment details and issue; the scope and terms are agreed for the particular need.
Repair and after-sales enquiries ↗
THE REAL PICTURE
Inside the making.
Three real photographs: core-coil assembly, the production floor and an installed OSTL transformer.
See more about manufacturing and our facilities. Original photographs and detailed facility information remain on the site.
A GUIDED FIRST STEP
Build a clearer
quotation brief.
Choose the equipment and add what you know. Mark any unknown rating or voltage “To be confirmed”.
This prepares a draft for WhatsApp or email. It is not an online submission, quotation or technical approval.
Use the full RFQ checklist ↗Contact and detailed enquiry page ↗BEFORE YOU GET IN TOUCH
Four useful answers.
A clearer next step.
Where are OSTL’s Kolkata office and manufacturing units?
The corporate office is in Kolkata. Manufacturing is at Unit 1, Howrah, West Bengal and Unit 2, Sankrail, Howrah. Explore Howrah manufacturing or view our facilities.
What transformer range can I enquire about?
Power and distribution transformers up to 10 MVA and up to 66 kV; dry-type up to 3 MVA. Confirm the exact rating, voltage, duty and configuration. Explore the rating guides.
How do I request a 500 kVA or 1000 kVA transformer price?
Start with construction, HV/LV voltages, losses, quantity, site and duty. No fixed price is published here. Review the 500 kVA or 1000 kVA / 1 MVA guide and prepare a comparable RFQ.
Does OSTL provide transformer repair and after-sales service?
Yes. Send equipment details, the issue and location to the Kolkata office. Scope and terms are agreed for the actual requirement. Read about repair and after-sales enquiries.
BISBIS licensedFive major transformer categories since 2020.Product-specific licence scope on request ↗ISOISO 9001:2015Quality management systemOpen original certificate (PDF) ↗ISOISO 14001:2015Environmental management systemOpen original certificate (PDF) ↗ISOISO 45001:2018Occupational health & safety management systemOpen original certificate (PDF) ↗
LET’S TALK ABOUT YOUR PROJECT
The right start is
a clear specification.
Share your rating, voltage and delivery requirements.