Transmission and subtransmission substations • Grid reinforcement • Generation and renewable interconnection • Large industrial projects
Power transformer solutions for substations, industry and project-specific high-capacity systems.
Factory capacity: up to 300 MVA at 110 kV and 900 MVA at 220 kV. Detailed catalogue tables cover 6.3–63 MVA at 110 kV and 50–360 MVA at 220 kV. Three-winding models also list 35 / 38.5 / 69 / 121 / 138 kV intermediate windings.
01 Technical data
Factory capacity: up to 300 MVA at 110 kV and 900 MVA at 220 kV. Detailed catalogue tables cover 6.3–63 MVA at 110 kV and 50–360 MVA at 220 kV. Three-winding models also list 35 / 38.5 / 69 / 121 / 138 kV intermediate windings.
02 Application engineering
Power transformer solutions for substations, industry and project-specific high-capacity systems.
Main step-down and step-up transformers in high-voltage substations, forming the link between transmission and distribution levels. Design is project-specific, based on the grid study, short-circuit levels, regulation needs and the network operator’s technical requirements.
Substations for ports, rail or metro systems, desalination, data center campuses and large industrial complexes. Delivery planning includes transport limits, site access and installation sequence alongside the electrical design.
Step-up transformers connecting solar, wind and storage plants to the grid, often in remote areas with variable output. Specifications address harmonics, cyclic loading, tap changing and the grid operator connection requirements.
03 Define your configuration
Select capacity, voltage and phases using the manufacturer catalogue values as references, or enter your requirements under Other. The manufacturer must confirm the proposed combination.
04 Construction and options
05 Applicable standards and requirements
06 Manufacturing process
Downloads & support
HKXR POWER Technical Selection Guide
Guide for initial technical selection of distribution, power, dry-type, pole-mounted and pad-mounted transformers.07 Decision support
Choose Power Transformers when the main duties are Transmission substations and Sub-transmission substations; compare Oil-Immersed Transformers when Utility distribution networks and Distribution substations better match the site. Final selection depends on the installation environment, network topology, fire or oil-containment requirements, rating and project specification.
Key choices include ONAN/ONAF cooling stages, tap changer / OLTC and monitoring and protection. Select them according to the load profile, connection arrangement, installation environment, protection philosophy and utility/EPC specification; items shown as options or project engineering are not automatic standard equipment.
Confirm ambient temperature, altitude, humidity, dust or corrosion exposure, indoor/outdoor location, ventilation, access and maintenance clearances. For applications such as Transmission substations, Sub-transmission substations and Large infrastructure, cooling, enclosure or insulation and protection should be reviewed during engineering rather than assuming one environmental class for every project.
Generic international market; standards and certification must be selected from the actual destination and project. Final losses, temperature rise, impedance, taps, accessories, tests and documentation must be checked against the applicable project specification; this page does not imply automatic approval by any authority.
Confirm the applicable routine tests, general arrangement drawings, electrical datasheet, accessory list and inspection/test documents before manufacturing. Type or special tests, witnessing and additional reports should be specified when the project requires them. For Power Transformers, also confirm site-specific environmental and installation engineering.
Provide at least Rated capacity, Primary voltage, Secondary voltage, Phases, the selected ONAN/ONAF cooling stages / tap changer / OLTC options, installation conditions and the applicable project or utility specification. If available, attach the SLD, datasheet or tender specification so the configuration can be reviewed before quotation.
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