1250 kVA Three-Phase Pad Mounted Transformer
Source factory-direct 1250 kVA (1.25 MVA) pad mounted transformers for 1.0MW compute sites. Available in ready US stock or fully custom voltage configurations.
Precise 1250 KVA Continuous Power. In Stock & Custom Engineered.
Key apeclicaticns et a glanoe for quick eference and oontident plenning.
1250 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
The Apexto 1250 kVA (1.25 MVA) Three-Phase Pad-Mounted Transformer is the benchmark power solution for facilities requiring an exact 1.0 MW continuous electrical load. It is purpose-built to power high-density crypto mining containers and enterprise-grade data center halls.
Stepping down standard 13.8kV, 34.5kV, or 12.47kV utility lines to dedicated 415Y/240V, 480Y/277V, or 600V circuits, it supports custom primary and secondary voltage configurations engineered to match your site's specific Single-Line Diagram (SLD).
Each unit features a heavy-duty welded steel tank, tamper-resistant cabinet construction, and robust cooling capacity engineered to support continuous full-load operation, fully UL/cUL certified and DOE compliant for long-term reliability.
Core Advantages
01. High-Efficiency Radiators
Large external radiator panels maximize surface area for natural oil cooling, maintaining stable thermal performance during continuous 24/7 heavy-duty operations.
02. Auxiliary Control Box
Clearly organized terminals and control components simplify field wiring, commissioning, inspection, troubleshooting, and routine maintenance for faster on-site service and support.
03. Integrated Monitoring Panel
Integrated gauges provide clear temperature, pressure, and operating status information, helping technicians identify abnormal conditions quickly during routine transformer inspections and maintenance.
04. Low-Voltage Connection Panel
Clearly marked X0, X1, X2, and X3 terminals simplify low-voltage cable connections, phase identification, installation, inspection, and routine maintenance in the field.
05. High-Voltage Protection
H1, H2, and H3 terminals combine high-voltage connections with protection and voltage adjustment components, supporting safer installation, operation, inspection, and maintenance.
06. High-Dielectric Bushing Layout
Heavy-duty high-voltage bushings deliver superior electrical insulation and generous clearance, paired with a rugged steel tank built for decades of reliable service.
Full Specifications
External dimensions
L:1730mm、W:1525mm、H:1885mm
Internal dimensions
L:1680mm、W:1475mm、H:1800mm
Weight
3800KG
|
Rated Capacity |
1000 kVA / 1 MVA |
Phase |
Three Phase |
|
Transformer Type |
Pad-Mounted Transformer |
Installation |
Outdoor |
|
Voltage Class |
Up to 35 kV* |
Primary Voltage |
Project-Specific |
|
Secondary Voltage |
Project-Specific |
Frequency |
60 Hz |
|
Cooling Method |
ONAN |
Insulating Fluid |
Mineral Oil* |
|
Enclosure Type |
Tamper-Resistant, Compartmentalized |
Feed Configuration |
Loop Feed / Radial Feed |
|
Primary Connection |
Dead-Front |
Temperature Rise |
65°C |
|
Overcurrent Protection |
Project-Specific |
Sectionalizing Switching |
Available / Project-Specific |
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 >>
2 x 1000 kVA Pad-Mounted Transformers for Data Center
Dual 1000 kVA three-phase padmount units deployed to support high-density server racks and liquid-to-chip cooling infrastructure for a regional edge compute facility.
13.8 kV
480Y/277V
ONAN 1000 kVA
1000 kVA (1 MVA) Pad-Mounted Transformer for BESS Storage
Liquid-filled 1000 kVA transformer supplied for a commercial battery energy storage system (BESS) integration, providing reliable bidirectional grid stepping.
1000kVA
12.47 kV
480Y/277V
1000 kVA Pad-Mounted Transformer for Crypto Mining Pod
Rugged 1000 kVA pad-mount transformer powering an 800 kW hydro-cooled ASIC mining pod, delivering non-stop 415V power under extreme desert heat.
34.5 kV
415Y/240V
99.4% Efficiency
4 x 1000 kVA Pad-Mounted Transformers for Industrial Grid
Four 1000 kVA step-down padmount transformers installed for an advanced manufacturing plant, fully compliant with Hydro-Québec 600V distribution standards.
4 x 1000 kVA
24.94 kV GrdY
600Y/347V
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
A 1000 kVA transformer can supply approximately 950 kW at a 0.95 power factor. For mining and data center projects, the final load calculation should also include cooling equipment, pumps, controls, networking, and other auxiliary systems rather than considering computing equipment alone.
A 1000 kVA three-phase transformer provides approximately 1,203A at 480V at full rated load. This value is an important reference when selecting the main switchboard, breakers, cables, busways, and downstream power distribution equipment.
Choose 1500 kVA when the expected load is already close to the practical capacity of a 1000 kVA transformer or when additional miners, cooling systems, racks, or other equipment are planned. Extra transformer capacity can make future expansion easier without rebuilding the main power infrastructure.
Yes. Apexto can configure a 1000 kVA pad-mounted transformer for common utility voltages such as 13.2kV or 13.8kV primary with 480Y/277V secondary. Other primary voltages can also be specified according to the utility supply and project requirements.
Choose radial feed for a simple dedicated transformer installation. Choose loop feed when the site includes multiple transformers, requires feeder sectionalizing, or may expand later. Apexto can configure the primary arrangement according to the site's medium-voltage distribution design.
Yes, in many retrofit projects. Provide the existing transformer nameplate, pad dimensions, cable-entry locations, conduit arrangement, and available drawings. Apexto can check the enclosure and connection layout before production to help the new transformer fit the existing site infrastructure.
Provide the primary voltage, secondary voltage, application, estimated total load, loop or radial feed requirement, termination type, impedance or BIL requirements, and any utility or EPC specifications. For replacement projects, an existing transformer nameplate and drawing can usually provide most of the required information.
Recommended Capacities
Discover our full lineup of three-phase pad-mounted transformers built for projects of any scale.
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1500KVA
1500 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 |
2250KVA
2250 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 |
2500KVA
2500 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 |
