Nine sectors. Project-specific requirements.
Explore the nine sectors below. The linked pages describe typical electrical needs and product categories to discuss; they are not promises of a standard design for every installation.
Steel & metal plants
Process duty, plant distribution and auxiliary loads.
Solar & renewables
Generation interfaces and site electrical distribution.
Oil & gas
Process loads and project-specific electrical interfaces.
Hospitals & real estate
Building services and essential electrical loads.
Educational campuses
Campus networks and changing building needs.
Cement
Plant distribution, process loads and auxiliaries.
Mining
Site loads, equipment location and environment.
Railways & metro
Facility distribution and auxiliary-equipment enquiries.
Utilities & DISCOMs
Network duty and buyer-specific requirements.
Scope before selection
OSTL’s confirmed overall power and distribution transformer range is up to 10 MVA and up to 66 kV. Dry-type transformers are manufactured up to 3 MVA. These are company-range ceilings, not a guarantee of every rating/voltage combination. Special-duty transformer limits, compact-substation component ratings and panel ratings are confirmed per project; 66 kV is not a dry-type or panel rating.
The products index covers the equipment range. For project records, see the four confirmed case studies. A record should be used only for the duty and supply facts it actually states.
Send a clearer quotation brief
Contact the Kolkata corporate office with the equipment category, duty, rating required, supply/interface voltages, quantity, site conditions and requested dispatch destination. Unknown items can be marked for technical discussion; do not assume a standard configuration.
Landline: 033 4061 3200 · ostltd@hotmail.com. The quotation checklist can help organise the brief.
Frequently asked questions
Which industries does OSTL supply?
OSTL supplies steel and metal plants; solar and renewable energy; oil, gas and petrochemicals; hospitals, real estate and commercial buildings; educational campuses; cement; mining; railways and metro; and utilities and DISCOMs. Duty, equipment scope and buyer-specific requirements are agreed for the particular project.
Are all product ratings the same across sectors?
No. Equipment is selected for the actual duty and installation. Overall power/distribution limits are up to 10 MVA and up to 66 kV, while dry type is up to 3 MVA. Special-duty and assembly/panel ratings require confirmation.
Do the sector pages prove a specific client installation or approval?
No. Only the linked approved case records establish the supply facts they state. Sector supply does not imply a particular utility approval, hazardous-area certification or unnamed client reference.