Different applications.
A clearer buying brief.

Start with the application, not an assumption

These buyer guides help project teams describe the network duty, installation constraints and quotation inputs. They are not a list of completed projects, guaranteed sector approvals or endorsements. The consultant, project engineer and OSTL should agree the exact technical and commercial scope.

Choose your project context

A common range, project-specific selection

OSTL manufactures power and distribution transformers within an overall range of up to 10 MVA and up to 66 kV; the exact rating/voltage combination needs confirmation. Dry-type transformers are a confirmed product line up to 3 MVA. The 66 kV company-range statement must not be applied to dry-type products.

Copper and aluminium winding options are confirmed, with the actual design selected against the project brief. ONAN cooling and CRGO core requirements remain to confirm.

Turn the application into an enquiry

• Required kVA/MVA, HV/LV voltage, phase, frequency and transformer construction.
• Application, load schedule/duty, site conditions, interfaces and relevant single-line diagram.
• Specified losses, impedance, temperature requirements and reference conditions, if defined by the project engineer.
• Quantity, delivery state/country, requested dispatch timeline and boundaries for freight, unloading and installation.