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Heavy-Duty Power 2500 kVA 3-Phase Pad-Mounted Transformer
Key specifications at a glance for quick reference and confident planning.
Rated Capacity
2500 kVA
Feed Type
Loop / Radial
Cooling Medium
ONAN
Frequency
60 Hz
Installation
Outdoor Pad-Mounted
WAREHOUSE LOCATIONS
USA • Canada • UAE • China • Global Dispatch
FAST DISPATCH
Ready Stock • Ships in 1-3 Days • DDP Door-to-Door
Product Profile
The 2500 kVA, or 2.5 MVA, Pad-Mounted Transformer is one of Apexto's key options for large power distribution projects, especially where medium-voltage utility service must be stepped down for high-current 480V systems.
Configurations such as 34.5 kV to 480Y/277V are particularly relevant to North American industrial, data center, and high-density computing infrastructure. Other primary and secondary voltage combinations can also be engineered to suit the site.
Loop-feed or radial-feed arrangements, protection, taps, impedance, and low-voltage connections can be matched to the project single-line diagram. This model is best suited to large installations that require a substantial, standardized 2.5 MVA power block.
Core Advantages
01. Dead-Front Dual Compartment
Features a dual-compartment design separating high and low voltage with a rigid steel barrier. Enclosed dead-front bushings ensure maximum touch safety and tamper protection.
02. Multi-Tier Fuse & Switch Bay
Integrates accessible Bay-O-Net fuses with a four-position load-break switch (Source A/B) and a tap changer, ensuring instant fault isolation and safe power transfer.
03. Comprehensive Gauge Suite
Equipped with precision dial thermometer, pressure/vacuum, and oil level gauges alongside an automatic pressure relief valve (PRV) for continuous operational safety.
04. Auxiliary Control Cabinet
Houses neatly organized DIN-rail circuit breakers, terminal blocks, a power supply, and convenience outlet, simplifying secondary control wiring and field testing.
05. High-Conductivity LV Busbars
Fitted with heavy-duty tin-plated NEMA spade terminals (X0–X3) designed for high current capacity, minimizing contact resistance and easing multi-cable connections.
06. C5-M Enclosure & Cooling Fans
Protected by a C5-M marine-grade steel enclosure with large cooling radiator banks and auxiliary forced-air fans, engineered for non-stop duty in harsh environments.
Full Specifications
External dimensions
W:1730mm、D:2100mm、H:2000mm
Internal dimensions
W:1680mm、D:2050mm、H:1950mm
Weight
6000KG
|
Rated Capacity |
2500 kVA / 2.5 MVA |
Phase |
Three Phase |
|
Frequency |
60 Hz |
Primary Voltage |
Customized (Typical 12.47kV / 13.8kV / 24.94kV / 34.5kV) |
|
Secondary Voltage |
Customized (Typical 480Y/277V) |
Winding Configuration |
Delta - Wye / Grounded Wye (Project Specific) |
|
Winding Material |
Copper / Aluminum Available |
Cooling Type |
ONAN |
|
Insulation Fluid |
Mineral Oil |
Temperature Rise |
65°C |
|
Impedance |
Typical 5.75% |
BIL Rating |
According to Voltage Class |
|
Vector Group |
Dyn1 / Customized |
Tap Changer |
Off-Circuit Tap Changer |
|
Standards |
ANSI / IEEE C57 / DOE |
Testing |
Factory Routine Testing |
Engineering Documents
Padmount Spec Sheet
Padmount Dimensional Drawings
Padmount Installation Manual
Padmount Test & Warranty Guide
Certifications & Grid Compliance
Fully compliant with UL, CSA, IEEE/ANSI, DOE, and IEC standards. Tested and certified by international authorities to ensure maximum safety, efficiency, and instant approval by local power utilities.
UL/cUL
CSA
CESI
IEEE
IEC
EN00676
AS-NZS
GOST
Infrastructure Capabilities
We supply a full lineup of pad-mount transformers built for heavy-duty power. From 24/7 crypto mining farms to mission-critical data centers, we deliver reliable equipment designed to run non-stop.
We also offer custom engineering tailored to your exact site. From specific high and low voltages to specialized enclosure specs, we customize and deliver units in as fast as 4–6 weeks to get your project powered up on schedule.
Design
Raw Material
Procurement
Procurement
Assembly
Testing
Packaging
Delivery
Request a Project Quote
Tell us about your project or custom requirements. Our power systems engineers will review your specs and provide a tailored proposal.
Global Project References
View All >>
Reykjavik, Iceland
2500 kVA Pad-Mounted Transformer for Geothermal Data Center
High-efficiency 2500 kVA (2.5 MVA) padmount unit delivered to power a 100% green geothermal compute facility, operating reliably in cold sub-arctic climates.
11 kV Class
415Y/240V
ONAN 2500
Frankfurt, Germany
2500 kVA (2.5 MVA) Transformer for European AI Facility
Three-phase 2500 kVA pad-mounted transformer dispatched via express freight to support an enterprise AI server expansion and high-density liquid cooling loops.
2500 kVA
20 kV Class
400V / 415V
West Texas, USA
4 x 2500 kVA Transformers for Mining Park
Convoys of 2500 kVA padmount transformers dispatched simultaneously to power a utility-scale 40-foot hydro container park under extreme desert heat.
4 x 2500 kVA
34.5 kV Class
415Y/240V
Calgary, Alberta, Canada
3 x 2500 kVA Padmount Units for High-Density Compute
Heavy-duty 2500 kVA step-down transformers installed alongside a massive louvered cooling infrastructure, fully compliant with Canadian 600V/415V grids.
2500 kVA
24.94 kV
600Y / 415V
Capabilities & Support
24-Month Quality Warranty
Enjoy peace of mind with our 24-month full warranty. If any operational issue arises with your transformer, our dedicated engineering team will resolve it rapidly and reliably.
Local Field Service Team
Whether in North America or global regions, our certified local engineering teams provide professional on-site transformer installation, energization testing, and maintenance.
24/7 Remote Video Support
Connect directly with our senior power engineers via live video for real-time installation guidance, system diagnostics, and instant troubleshooting support, anytime and anywhere.
Spare Parts & Support
We maintain an extensive inventory of genuine spare parts for fast dispatch, paired with lifetime technical guidance to maximize your equipment uptime.
Need a Customized Power & Transformer Solution?
Talk to our engineers to get an optimized configuration and fast quote.
FAQs
Is a 2500 kVA transformer suitable for a 2 MW mining or data center load?
Yes, in many projects. A 2 MW load requires approximately 2,105 kVA at 0.95 power factor, leaving about 395 kVA for operating margin and auxiliary loads. If 2 MW refers only to miners or IT equipment, cooling and other site loads must be added before final sizing.
Is a 3000A switchgear enough for a 2500 kVA transformer at 480V?
A 2500 kVA transformer delivers approximately 3,007A at 480V at full load. A 3000A switchgear can be used when the system is intentionally limited below full transformer output, but it does not provide capacity to use the complete 2500 kVA rating. Final switchgear sizing should follow the expected load and protection design.
Why does a 2500 kVA transformer need so many parallel secondary cables?
Because the secondary current exceeds 3,000A at 480V. Multiple parallel conductors are typically required between the transformer and switchgear. The exact number depends on conductor size, copper or aluminum, termination ratings, installation method, and applicable electrical code.
Is busway or close-coupled switchgear better than parallel cables for a 2500 kVA transformer?
For very short transformer-to-switchgear connections, busway or close-coupled switchgear can reduce the number of large parallel cable runs. Parallel cables remain practical when more installation flexibility or distance is required.
What fault current can a 2500 kVA transformer produce at 480V?
With 5.75% impedance, a 2500 kVA transformer can produce approximately 52 kA of transformer-limited fault current at 480V. This value should be considered when selecting switchgear AIC/SCCR ratings and completing the short-circuit study.
If two 2500 kVA transformers are connected through a bus tie, can one transformer carry both buses if the other fails?
Only if the combined transferred load remains within the surviving transformer’s capacity. A bus tie provides redundancy and operating flexibility, but it does not turn one 2500 kVA transformer into a 5000 kVA source. Load shedding may be required during a transformer outage.
Recommended Capacities
Discover our full lineup of three-phase pad-mounted transformers built for projects of any scale.
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1250KVA
1250 kVA Pad Mount Three-Phase Transformer
|
Primary Voltage |
2.4 kV – 34.5 kV Class |
|
Secondary Voltage |
120 V – 600 V Range |
|
Availability |
USA & China |
1500KVA
1500 kVA Pad Mount Three-Phase Transformer
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Primary Voltage |
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|
Secondary Voltage |
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|
Availability |
USA & China |
2000KVA
2000 kVA Pad Mount Three-Phase Transformer
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Primary Voltage |
2.4 kV – 34.5 kV Class |
|
Secondary Voltage |
120 V – 600 V Range |
|
Availability |
USA & China |
3000KVA
3000 kVA Pad Mount Three-Phase Transformer
|
Primary Voltage |
2.4 kV – 34.5 kV Class |
|
Secondary Voltage |
120 V – 600 V Range |
|
Availability |
USA & China |
