3750 kVA Three-Phase Pad Mounted Transformer
Apexto builds 3750 kVA (3.75 MVA) pad mounted transformers for ~3MW mega data centers & mining sites. Custom options supported with fast lead time.
Flagship 3.75 MVA Infrastructure. Unstoppable 3.0MW Heavy Power.
Key apeclicaticns et a glanoe for quick eference and oontident plenning.
3750 kVA
Loop / Radial
ONAN
60 Hz
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
Delivering ~3.0 MW of continuous throughput, the Apexto 3750 kVA (3.75 MVA) Three-Phase Pad-Mounted Transformer powers hyperscale AI data centers and multi-megawatt mining parks. Its electrically balanced, non-aging silicon steel core provides maximum short-circuit strength under extreme electrical loads.
Stepping down 4.16kV, 13.8kV, or 34.5kV lines to dedicated 480Y/277V or 415V circuits, it maximizes energy savings. Superior transformation efficiency reduces heat emissions and cooling overhead, delivering a significantly lower Total Cost of Ownership (TCO).
Housed in a NEMA 3R weather-sealed enclosure with a 65°C temperature rise rating, it features outward-facing base holes for rapid power-tool installation. Fully UL/cUL certified, it ensures long-term operational lifespan with seamless utility grid interconnection.
Core Advantages
01. Heavy-Duty C5-M Radiators
Protected by an outdoor C5-M marine-grade steel enclosure with extensive cooling radiator banks, engineered for non-stop 24/7 heat dissipation in extreme climates.
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. 6-Bushing Loop Feed System
Features six dead-front high-voltage bushings (H1A–H3B) with insulated caps to support loop-feed daisy-chaining, guaranteeing continuous and flexible cable routing.
04. Low-Loss Core & Windings
Built with high-grade grain-oriented silicon steel cores and precision-wound coils, delivering ultra-low electrical losses and superior short-circuit withstand capacity.
05. Complete Monitoring Gauges
Features precision dial temperature, pressure/vacuum, and oil level gauges alongside a sampling valve, ensuring continuous visibility of internal operating status.
06. Reinforced LV Spade Busbars
Fitted with heavy-duty copper spade busbars (X1–X3) and rigid yellow support braces, engineered to handle massive 3.75 MVA current throughput with minimal resistance.
Full Specifications
External dimensions
L:2540mm、W:2210mm、H:2160mm
Internal dimensions
L:2490mm、W:2160mm、H:2110mm
Weight
6900KG
|
Rated Capacity |
3750 kVA / 3.75 MVA |
Phase |
Three Phase |
|
Primary Voltage |
Customized (Typical 12.47kV / 13.8kV / 24.94kV / 34.5kV) |
Secondary Voltage |
Customized (Typical 480Y/277V) |
|
Frequency |
60 Hz |
Winding Configuration |
Delta / Wye / Grounded Wye, Project-Specific |
|
Cooling Type |
ONAN |
Insulation Fluid |
Mineral Oil |
|
Temperature Rise |
65°C |
Enclosure Type |
Tamper-Resistant, Compartmentalized |
|
Feed Configuration |
Loop Feed / Radial Feed |
Primary Connection |
Dead-Front |
|
Impedance |
5.74% |
Feed Configuration |
Radial Feed |
|
Primary Access |
Dead Front |
Enclosure |
NEMA Type 3R |
|
IP Rating |
IP24 |
Standards |
IEEE / ANSI / DOE / CSA, as applicable |
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.
Procurement
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 >>
8 x 3750 kVA Pad-Mounted Transformers for Desert Compute Park
An aerial array of eight 3750 kVA (3.75 MVA) padmount units deployed to power a 25MW desert computing facility under 50°C ambient temperatures.
33 kV Class
415Y/240V
ONAN 3750 kVA
3750 kVA Transformer for Turnkey ApexTo Hydro Mining Facility
High-capacity 3750 kVA transformer directly coupled with ApexTo hydro-cooling containers, powered by 100% renewable hydroelectric energy from the local grid.
3750 kVA
23 kV Class
415Y/240V
2 x 3750 kVA (3.75 MVA) Transformers for Sub-Arctic AI Center
Dual 3750 kVA step-down padmount transformers interconnected with high-density compute skids, delivering continuous ~6MW power in freezing northern climates.
20 kV Class
400V / 480V
99.50% Efficiency
2 x 3750 kVA Pad-Mounted Transformers for Fast-Track Substation
Two heavy-duty 3750 kVA pad-mounted transformers delivered on-site for rapid substation commissioning, stepping down 35kV utility power to dedicated 415V circuits.
2 x 3750 kVA
35 kV Class
415Y/240V
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
At 480V, a 3750 kVA three-phase transformer delivers approximately 4,511A at full load. A 5000A switchgear lineup therefore provides a practical distribution class for the transformer while allowing the final protection and loading to be engineered correctly.
600V can significantly reduce secondary current. A 3750 kVA transformer produces about 4,511A at 480V, but only about 3,608A at 600V. This can reduce the burden on busways, conductors, and low-voltage distribution when the connected equipment supports 600V.
Because secondary current can exceed 4,500A at 480V. Keeping the transformer and main switchgear close helps reduce long high-current cable runs, voltage drop, installation complexity, and conductor cost.
Choose 3750 kVA when a 3000 kVA transformer leaves insufficient margin for cooling loads, additional equipment, or planned expansion. It is especially useful for projects approaching the 3 MW power-block range without moving immediately to a much larger substation transformer.
Yes. Large pad-mounted transformers require the final shipping weight, dimensions, lifting points, crane capacity, access route, and concrete pad to be confirmed before delivery. Apexto can provide the approved dimensional drawing and shipping information for site planning.
Primary voltage, secondary voltage, total load, application, loop/radial feed, termination type, impedance/BIL requirements, and any existing utility or EPC specification.
Recommended Capacities
Discover our full lineup of three-phase pad-mounted transformers built for projects of any scale.
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1000KVA
1000 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 |
2000KVA
2000 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 |
2550KVA
2550 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 |
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 |
