3750 KVA Pad Mount Three-Phase Oil-Immersed Distribution Transformer

The 3750 kVA Pad Mounted Transformer moves beyond simple distribution; it acts as a compact, ground-level substation. Delivering massive power (approx. 4500 Amps at 480V) in a single enclosure, this unit is engineered for high-density applications like cryptocurrency mining farms, hyperscale data centers, and large-scale solar collection grids.

 

While standard commercial padmounts are typically sized for strip malls or housing estates, this 3.75 MVA unit is a specialized industrial asset. It utilizes a reinforced "Unit Substation" tank design, providing the necessary internal clearance for higher voltage insulation and the physical volume required to house nearly 1,000 gallons of cooling fluid.

Assembly of heavy copper busbars to handle 4500A low voltage

output.

At 3750 kVA, heat rejection is the primary engineering challenge. A standard corrugated tank wall often lacks sufficient surface area to dissipate the core losses effectively.

• Radiator Banks: This unit is frequently equipped with Detachable Panel Radiators. These extend from the tank side to maximize airflow.
• Logistics Logic: To comply with road transport width limits, these radiators can be unbolted and shipped separately. Upon arrival, they are re-attached, and the valves are opened, allowing the unit to operate at full load with a standard 65°C temperature rise, preventing the insulation degradation common in overheated "compact" units.

Protecting a 3.75 MVA asset requires more than simple fuses. Fuses at this amperage are massive, expensive, and slow to replace.

• VFI (Vacuum Fault Interrupter): We recommend integrating a VFI Breaker inside the tank.
• The Benefit: This provides resettable electronic protection. If a fault occurs, there are no fuses to replace. The system trips like a circuit breaker, and protection curves (TCC) can be programmed electronically to coordinate perfectly with downstream switchgear, ensuring precise selective coordination.

• Bitcoin/Crypto Mining: Feeding 40ft mining containers where high density and compact footprint are mandatory. The 3750 kVA size perfectly matches the load of modern 3MW+ containers.
• Solar Step-Up: Inverters outputting 600V or 800V feed into the LV side, stepping up to 34.5kV for grid connection.
• Industrial Expansion: Providing a "Plug-and-Play" substation for factory expansions without the need to build a fenced outdoor yard.

3750 kVA unit substation transformer providing power for a major

industrial factory expansion.