Railways & metro. Start with the electrical brief.

Typical electrical planning needs

Plan for the actual facility and electrical network rather than treating every railway or metro application as the same transformer duty.

• Station buildings, depots, workshops and other facilities can have different distribution and auxiliary-load requirements.
• Separate the network supply, building services, equipment interfaces and future-load provisions in the electrical brief.
• State access, space, environmental and protection requirements through the project’s qualified electrical designer.

OSTL products to discuss

These are product categories to discuss, not a traction-system specification or a claim of railway approval. Special requirements and procurement eligibility must be reviewed for the particular project.

Range and project boundaries

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.

BIS, ISO and project-specific documentation

OSTL has held BIS licences in all five major transformer categories since 2020. This is a company credential, not a blanket BIS certification claim for this product line. Ask for the exact licence scope and the standards and documentation applicable to the proposed equipment.

OSTL is ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certified; copies available on request. Management-system certification does not establish a particular product rating, enclosure class, efficiency level or test approval. Agree the technical requirements and supporting records in the written offer.

Prepare the project-specific enquiry

Include the single-line diagram, load schedule, equipment interfaces, quantities, site conditions, installation constraints and requested documentation. Identify any authority-specific or traction-related requirements for separate technical review.

Explore the industries index and the quotation checklist before submitting the brief.

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.