Description:

The UL-listed three-phase pad-mounted power transformer is an outdoor power distribution device compliant with the safety standards of Underwriters Laboratories (UL). It adopts a fully sealed pad-mounted structure, specially designed for medium and low-voltage power distribution systems. Its core characteristics are as follows:

Structural Standards:

• Complies with UL 1562 (oil-immersed transformers) or UL 1836 (dry-type transformers) certifications, with a protection rating typically reaching IP65/66. It can be directly installed on concrete foundations and adapts to harsh outdoor environments (such as rain, dust, and high temperatures).

Electrical Parameters:

• Capacity Range: Usually 50kVA to 5000kVA, meeting the load requirements of different scales.
• Voltage Classes: The high-voltage side commonly includes 7.2kV, 12.47kV, 13.8kV, 34.5kV, etc.; the low-voltage side outputs three-phase four-wire voltages such as 208V/120V, 480V/277V, 600V (compatible with North American standards).

Insulation and Cooling:

• Oil-Immersed Type: Uses mineral oil or environmentally friendly high-flash-point oil (such as silicone oil) as the insulation medium, combining cooling and fireproof performance (complying with UL 1203 explosion-proof standards).
• Dry-Type (Optional): High-voltage windings are cast with epoxy resin, requiring no maintenance, suitable for scenarios with higher fireproof requirements.

Core Functions:

Power Conversion and Distribution:

• Steps down medium-voltage power grids (e.g., 13.8kV) to low voltage (e.g., 480V), providing stable power for three-phase loads (such as motors and large equipment), while supporting multi-loop 分户配电 (household distribution).

Safety and Reliability Assurance:

• The fully sealed structure isolates external pollution, preventing moisture and dust from affecting insulation performance.
• Equipped with a temperature controller, pressure relief valve, and gas relay (for oil-immersed types), it automatically protects against short circuits or fire risks when oil temperature is too high (e.g., exceeding 95°C) or internal faults occur.
• UL certification ensures products comply with North American safety codes (such as short-circuit withstand capacity and insulation voltage standards).

Grid Compatibility:

• Supports harmonic suppression design (optional filter windings), reducing interference from non-linear loads (such as frequency converters and data center equipment) to the power grid and improving power quality.

Typical Application Scenarios:

Commercial and Industrial Sectors:

• Data Centers/Bitcoin Mining Farms: Supplies three-phase 480V power for server clusters and mining machines, supporting high-load continuous operation. Redundant windings are often configured to ensure 99.99% power availability.
• Manufacturing: Drives three-phase motors (such as fans, water pumps, machine tools), suitable for factory production lines, food processing plants, etc.
• Commercial Parks: Provides three-phase power (such as elevators, air conditioning systems) and lighting distribution for shopping malls, office buildings, hospitals, etc.

Municipal and Infrastructure:

• Residential Power Distribution: Serves as a community substation, stepping down the municipal medium-voltage grid for distribution to each unit (e.g., three-phase 208V access, converted to single-phase 120V for households).
• Transportation Hubs: Powers escalators, lighting systems, and monitoring equipment in subway stations and airports.

New Energy and Special Scenarios:

• Distributed Generation: Acts as a grid-connected transformer in photovoltaic and wind power projects (e.g., 34.5kV step-up side) or regulates voltage in microgrids to match loads.
• Harsh Environments: Corrosion-resistant coatings (such as zinc-nickel alloy casings) are used in coastal areas, and seismic designs (complying with UL vibration test standards) are configured in mining areas to adapt to salt spray, dust, and other environments.

Parameter: