Repair and after-sales, scoped to the equipment
OSTL provides transformer repair and after-sales service. Start by describing the equipment and the issue, so the requirement can be reviewed before a scope is agreed. A repair enquiry is not a diagnosis, a confirmation that a unit can be repaired, or a commitment to a particular response or completion time.
For existing OSTL equipment, include any available order or serial reference. For any other repair enquiry, share the nameplate and condition records so OSTL can confirm whether the requirement is within the scope it can undertake.
Prepare a useful repair brief
- Nameplate photograph, rating, HV/LV voltage and transformer type.
- Equipment identification and any available order or serial reference.
- A factual description of the issue, when it was observed and current equipment status.
- Site location, access constraints and the relevant site contact.
- Available maintenance history, drawings and existing inspection or test records.
- The requested scope of help and any operational constraints.
Do not approach unsafe equipment to obtain information. Only send photographs and records that your authorised site team can obtain safely. Avoid guessing the internal fault or treating a photograph as evidence that equipment is safe to operate.
Agree the work before it begins
Ask OSTL to confirm what will be assessed, the proposed repair scope, the records to be provided and each party’s responsibilities. Clarify any site or workshop arrangements, handling, transport and acceptance requirements in writing. Do not assume any of these are included automatically.
Costs, scheduling and commercial terms depend on the actual requirement. This page does not promise emergency attendance, a fixed turnaround time, restoration of original performance, a service radius or a particular warranty. No such claim should replace the agreed technical and commercial offer.
After-sales support
For questions concerning supplied equipment, share the equipment reference and the specific assistance needed. Available records and the original supply scope help establish the right next step. Support should be coordinated through the Kolkata office rather than inferred from a general product description.
For a new supply, use the power, distribution or dry-type transformer pages. For the works context, see manufacturing in Howrah.
Speak to the Kolkata office
Call or WhatsApp +91 70035 13107, call the landline 033 4061 3200, or email ostltd@hotmail.com. Use the contact page for the Kolkata office address and direct contact options. Describe the request as repair or after-sales support so it can be reviewed in the right context.
Frequently asked questions
Does OSTL provide transformer repair and after-sales service?
Yes. OSTL provides transformer repair and after-sales service. The work required, its feasibility and the agreed responsibilities must be confirmed for the particular transformer.
What should I send with a repair enquiry?
Send the nameplate details, rating, HV/LV voltages, site location, reported issue and any available maintenance or test records. Photographs should be taken only where access is safe and authorised.
Can this page diagnose a transformer fault?
No. This page is not a fault diagnosis or an instruction to open, energise or work on equipment. A qualified and authorised electrical team must assess the condition and safe arrangements.
Are costs, timeframes or warranty terms fixed?
No fixed repair cost, completion time or warranty term is stated here. Ask OSTL for a written project-specific scope and commercial terms after the requirement is reviewed.