1500 KVA Pad Mount Three-Phase Oil-Immersed Distribution Transformer

The 1500 kVA Pad Mounted Transformer acts as a centralized substation for large-scale infrastructure. While physically imposing, it is engineered with a low-profile cabinet to blend into the landscaping of high-value properties.

This unit redefines the category of residential pad mounted transformer. Unlike small 25 kVA cans found in suburban backyards, this 1.5 MVA giant is designed for "Vertical Neighborhoods"-high-rise condominium towers or large apartment complexes. A single unit can energize over 100 individual residential units (assuming standard diversified loading), replacing the need for banks of smaller transformers and simplifying the estate's underground cable network.

The engineering challenge at 1500 kVA is not just transforming voltage, but physically terminating the output current. At 480V, this unit delivers approximately 1804 Amps. To carry this load, installers often need to land 6 to 8 parallel runs of 500 MCM or 750 MCM cables per phase.

To accommodate this "Sea of Cables," the Low Voltage compartment features a Staggered Spade Arrangement.

• The Geometry: The NEMA spade terminals (paddles) for Phase A, B, and C are not aligned in a flat plane. Instead, they are offset in depth.
• The Benefit: This tiered spacing provides installers with critical wrench clearance. It allows for the proper torquing of bolts on the rear cables without being obstructed by the front cables, ensuring a secure, low-resistance connection that prevents "hot spots" from loose lugs.

Staggered NEMA spade terminals in low voltage compartment for

connecting multiple heavy cables.

Properly situating this asset requires precision. When contractors prepare to mount transformer units of this mass (approx. 4,500 kg), the concrete pad must be reinforced.

• Window Alignment: The bottom sill is designed with a large, open rectangular throat. We provide precise template drawings to ensure the primary and secondary conduits in the concrete align perfectly with the bushing wells, preventing stress on the elbows during the final set-down.
• Sill Integrity: The base rails are constructed from structural C-channel steel, coated with a coal-tar epoxy or undercoating to prevent corrosion where the metal meets the potentially damp concrete surface.

• High-Rise Condos: Sitting at the base of a 30-story residential tower, stepping down 13.8kV to 480V for the building's riser bus duct.
• Mixed-Use Developments: Powering a city block that combines ground-floor retail with upper-level apartments.
• University Dorms: A single centralized power node for a large student housing campus.

1500 kVA pad mounted transformer powering a high-rise residential

condominium tower.