A useful brief reduces avoidable assumptions
A quotation request should let the manufacturer identify the required transformer and the boundaries of supply. If a value is not known, mark it “to be confirmed” rather than copying an assumed default from another project. Attach the consultant or tender technical schedule when one exists.
Use this checklist for an initial discussion with OSTL. It is not an engineering design, a published product specification or a confirmation that every requested feature is available. The online form does not transmit or store submissions; use the listed phone, email or WhatsApp contact for an actual enquiry.
Technical information to prepare
| Topic | Include in the request |
|---|---|
| Project and duty | New/replacement installation, application, load information and any existing nameplate/drawings. |
| Electrical basics | Required kVA/MVA, transformer type, HV/LV voltage, phase and frequency. |
| System interface | Required connection/vector group, tapping, earthing, fault-level information and terminations, if specified. |
| Performance | Loss limits, impedance, temperature requirements and the reference/test conditions where applicable. |
| Construction | Winding preference, cooling, core, insulation, enclosure and requested accessories; confirm availability. |
| Site | Indoor/outdoor location, ambient conditions, altitude, dust/moisture exposure, available space and access. |
| Standards and acceptance | Applicable standards/editions, licence scope if required, drawings, test reports and inspection/witness requirements. |
| Commercial essentials | Quantity, delivery state/country, requested timeline, packing, freight, unloading, installation and other scope boundaries. |
Copy or download a blank RFQ worksheet
Replace the blanks with your project information. Do not treat the worksheet as an OSTL offer or a guaranteed specification.
Compare the answers, not just the totals
Ask the supplier to return a completed technical schedule with deviations and exclusions. Check that quotations use the same rating and voltage, agreed performance requirements, materials and included scope. Separate transformer supply from freight, unloading, installation, inspection and other services so the comparison is meaningful.
A rating such as 160 kVA or 500 kVA does not establish a price, voltage, stock status, dimensions or licence coverage. See the ratings enquiry guide before requesting a rating-specific offer.
Contact the Kolkata office
Send the completed brief to ostltd@hotmail.com, call +91 93310 15264, or open WhatsApp. Include your company and delivery location. Requested timelines, technical feasibility and commercial terms are confirmed in the quotation.