Underground distribution • Residential developments • Commercial sites • Industrial parks
Pad-mounted transformer solutions for underground distribution and site power systems.
Single-phase ratings: 15–250 kVA. Three-phase ratings: 10–1600 kVA. Three-phase HV ratings run from 6 to 36 kV; single-phase paired HV ratings include 13.8/7.967, 20/11.547, 30/17.32 and 33/19 kV.
01 Technical data
Single-phase ratings: 15–250 kVA. Three-phase ratings: 10–1600 kVA. Three-phase HV ratings run from 6 to 36 kV; single-phase paired HV ratings include 13.8/7.967, 20/11.547, 30/17.32 and 33/19 kV.
02 Application engineering
Pad-mounted transformer solutions for underground distribution and site power systems.
Transformation at ground level in underground MV cable networks, with protected compartments instead of a substation building. Suits cities and new developments where overhead lines are restricted and cable terminations must be enclosed.
Shopping centers, office parks, hospitals and mixed-use complexes served from a utility cable ring. The compact footprint allows installation near the load, and fusing and switching options can be agreed with the network operator.
Collector and auxiliary transformation for solar farms, wind sites and mine or plant private networks. Ground-level compartments simplify cable entry from underground collector circuits and can be configured to the owner protection scheme.
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 Pad-Mounted Transformers when the main duties are Underground distribution and Renewable and private networks; compare Pole-Mounted Transformers when Overhead distribution and Utility distribution feeders 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 radial / loop / terminal feed, MV cable connectors and switching and fusing. 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 Underground distribution, Renewable and private networks and Commercial complexes, 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 Pad-Mounted Transformers, also confirm site-specific environmental and installation engineering.
Provide at least Rated capacity, Primary voltage, Secondary voltage, Phases, the selected radial / loop / terminal feed / MV cable connectors 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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