System and insulation levels
Define this requirement in the enquiry and confirm it in the approved quotation and project documentation.
Product overview
Power Transformers
Substations and bulk power transfer
Power Transformers
High-capacity transformer solutions developed for the exact system and operating duty.
Typical applications
- Utility and EPC projects
- Industrial facilities
- Energy infrastructure
Design priorities
Power Transformers
Load profile and cooling stages
Define this requirement in the enquiry and confirm it in the approved quotation and project documentation.
Impedance and short-circuit duties
Define this requirement in the enquiry and confirm it in the approved quotation and project documentation.
Tap-changing requirements
Define this requirement in the enquiry and confirm it in the approved quotation and project documentation.
Transport envelope and site access
Define this requirement in the enquiry and confirm it in the approved quotation and project documentation.
Inspection, testing and documentation
Define this requirement in the enquiry and confirm it in the approved quotation and project documentation.
Technical evaluation table
| Specification area | Project input to confirm | Approval record |
|---|---|---|
| Electrical duty | Rated power, voltage ratio, frequency, phases and load profile | Technical data sheet and approved quotation |
| System interface | Vector group, impedance, earthing, fault level and parallel operation | Single-line diagram and guaranteed particulars |
| Voltage control | Tap range, step size and off-circuit or on-load operating requirement | Approved drawings and control philosophy |
| Thermal design | Cooling class, ambient temperature, altitude and overload duty | Rating plate, calculations and test basis |
| Losses | Guaranteed no-load and load loss with the applicable tolerance | Guaranteed particulars and routine test report |
| Materials | Winding conductor, insulating fluid and project-specific restrictions | Approved material schedule |
| Accessories | Protection, alarms, monitoring, terminal equipment and marshalling scope | Accessory list and wiring drawings |
| Verification | Governing standard, routine tests, requested type or special tests | Inspection plan and traceable test reports |
Configuration options
Cooling stages
ONAN, ONAF or OFAF terminology may be evaluated where relevant; the approved quotation defines the actual cooling arrangement and ratings.
Voltage regulation
Off-circuit or on-load tap-changing requirements are reviewed against operating philosophy and network studies.
System performance
Insulation level, impedance, losses and short-circuit duties are coordinated with the project specification.
Transport and assembly
Mass, transport envelope, lifting, oil handling and site access are considered before the configuration is frozen.
Engineering documents
Approval documents
Data sheet, guaranteed particulars, general arrangement, terminal plan and approved deviation list.
Inspection and tests
Inspection plan, agreed procedures, routine test report and applicable type or special-test evidence.
Delivery records
Nameplate data, manuals, packing records, certificates and the final document register for the delivered unit.
Related applications
Power Distribution
Review operating conditions, specification priorities and project questions for this application.
Industrial Facilities
Review operating conditions, specification priorities and project questions for this application.
Infrastructure
Review operating conditions, specification priorities and project questions for this application.
Frequently asked questions
Which data should be included in the first enquiry?
Provide the application, required capacity, primary and secondary voltage, frequency, quantity, destination, installation environment, governing standard and target schedule.
Are ratings and accessories selected from a fixed catalogue?
The final configuration is confirmed against the project duty. The approved quotation identifies the applicable ratings, accessories, guarantees, tests and exclusions.
How are standards and tests defined?
Name the governing standard, edition, employer specification and utility amendments. Routine, type and special test requirements should be agreed before manufacturing.
What documentation should buyers request?
Define the required drawings, guaranteed technical particulars, inspection plan, test reports, certificates, nameplate information, manuals and final document register.