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.
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Flagship 3.75 MVA Infrastructure. Unstoppable 3.0MW Heavy Power.
Key specifications at a glance for quick reference and confident planning.
Rated Capacity
3750 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 3750 kVA Three-Phase Pad-Mounted Transformer is aimed at multi-megawatt infrastructure where power density, equipment count, and long-term scalability are major design considerations. Rather than deploying several smaller units, some projects can benefit from concentrating more capacity into each transformer block.
Its 3.75 MVA rating is suited to large data centers, mining campuses, and industrial facilities with substantial downstream distribution requirements. Heavy-duty cooling, high-current low-voltage connections, monitoring, and robust feed arrangements become increasingly important at this scale.
For large sites, the 3750 kVA model can help simplify transformer layout and support higher-capacity distribution zones while still allowing project-specific voltage and protection engineering.
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.
Design
Raw Material 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.
Submit Inquiry ➔Global Project References
View All >>
Abu Dhabi, UAE
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
Hernandarias, Paraguay
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
Oulu, Finland
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
Tbilisi, Georgia
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.
Contact SalesFAQs
Why is a 3750 kVA transformer often paired with 5000A switchgear?
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.
Should I use 480V or 600V secondary power at 3750 kVA?
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.
Is 415V still practical for a 3750 kVA mining project?
It can be used, but a full 3750 kVA output at 415V is approximately 5,217A. For large hydro mining deployments, Apexto recommends reviewing the complete LV distribution architecture rather than selecting 415V only because the miners operate at 415/240V.
Can a 3750 kVA transformer support a 3 MW mining or data center load?
Yes, if 3 MW represents the total site demand. At 0.95 power factor, 3 MW requires about 3,158 kVA. If 3 MW represents only miners or IT equipment, cooling, pumps, networking, and auxiliary loads must be added before confirming 3750 kVA.
Why should the main switchgear be installed close to a 3750 kVA transformer?
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.
When should I choose 3750 kVA instead of 3000 kVA?
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.
Does a 3750 kVA transformer require special delivery and unloading planning?
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.
What information does Apexto need before quoting?
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.
View All >>
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 |
Flagship 3.75 MVA Infrastructure. Unstoppable 3.0MW Heavy Power.
Key specifications at a glance for quick reference and confident planning.
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
The 3750 kVA Three-Phase Pad-Mounted Transformer is aimed at multi-megawatt infrastructure where power density, equipment count, and long-term scalability are major design considerations. Rather than deploying several smaller units, some projects can benefit from concentrating more capacity into each transformer block.
Its 3.75 MVA rating is suited to large data centers, mining campuses, and industrial facilities with substantial downstream distribution requirements. Heavy-duty cooling, high-current low-voltage connections, monitoring, and robust feed arrangements become increasingly important at this scale.
For large sites, the 3750 kVA model can help simplify transformer layout and support higher-capacity distribution zones while still allowing project-specific voltage and protection engineering.
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.
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.
Submit Inquiry ➔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.
Contact SalesFAQs
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.
View All >>
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 |
Customize Your Power Solution
Share your requirements below. Our consultants will contact you via WhatsApp or email within 24 hours with a custom-matched proposal.
In-stock miners will ship within 3 business days. For bulk orders, please allow an additional 1-2 days via DHL Express, UPS, FedEx, or TNT.
Pre-order miner delivery times depend on the factory schedule. Estimated delivery dates are provided on the order page, but delays may occur due to production issues.
Shipments are processed on a first-paid, first-shipped basis. Once full payment is received, we aim to ship as quickly as possible. Payments via wire transfer (T/T) may take 3-7 business days to verify, while cryptocurrency payments typically take a few hours to 1 business day.
International shipping usually takes 5-8 business days, with remote locations potentially requiring 8-10 days.
*All sales are final and non-refundable. Please understand, this is an industry standard.
All products listed on our website are priced in US Dollars.
We accept payments via bank wire transfer or online cryptocurrency payment (BTC, ETH, KAS, USDT, USDC).
If you prefer other payment methods, please contact our sales team.
Important: All cryptocurrency payments received on the website are automatically converted to USDT. If a product is out of stock, we will contact you for a refund. The refund will be based on the USD price at the time of your original order.
We offer DDP (Delivery Duty Paid) shipping to some countries, including the United States, Canada, Russia, Dubai, and certain EU countries.
If you require DDP shipping, please contact our customer service. For countries without DDP shipping or for standard shipping, we can help reduce taxes by providing a lower invoice value.
Customs duties are not included in the total price. You will need to pay them once the goods arrive in your country. Simply contact your local logistics company to settle the fees. If needed, we can provide a commercial invoice with a declared value of your choice.
Please notify us immediately if customs requests documents, as improper filing may lead to higher fees or delays. We can provide the necessary documentation.
For new, factory-sealed miners, the warranty is typically 12 months or 6 months, depending on the factory's policy, starting from the production date.
The company is not responsible for issues resulting from failure to follow the provided instructions, specifications, or alterations to the product.
For used mining machines, there is no warranty or after-sales service; however, before shipment, we will provide mining machine testing videos to ensure you understand its performance. Once you confirm acceptance, we will proceed with full communication and arrange shipment.
Transportation and any other costs related to product returns are the responsibility of the purchaser.
The repair period will depend on the nature of the issue.
- CMCaleb Montgomery CA
Faye was very kind and helpful
Faye was very kind and helpful, even with the time difference. She quickly cleared up my doubts about the L9 miner.
Date of experience : January 31, 2025 - JPJerry Pan US
Fast Shipping
Order arrived sooner than expected - great experience with Apexto Mining!
Date of experience : March 03, 2025 - RHRephael Hanks CA
Buying miners from Apexto for 5 years
Buying miners from Apexto for 5 years - trustworthy, professional, and delivers quality!
Date of experience : March 03, 2025 - BVBruno Vargas ES
Easier than I expected. Thanks Faye
I'm very satisfied with my purchase (Elphapex Home). Additionally, I must thank Faye for the excellent service she provided; she answered all my questions whenever I needed.
Date of experience : January 20, 2025 - LCLuis Clingerman US
Fast Shipping
The customer service on WhatsApp is excellent, and shipping is fast - from Hong Kong to North America without delay. I'm very happy with the experience!
Date of experience : January 31, 2025
