UL Certified Three Phase Pad Mounted Transformer for Distribution Networks

The TSTY Three Phase Pad Mounted Transformer is a compact, tamper-proof, and highly reliable distribution transformer designed for ground-level installation. Specifically engineered for underground power networks, this unit steps down medium voltage to utilization voltage, making it the ideal solution for commercial complexes, industrial facilities, renewable energy plants, and public infrastructure.

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Three Phase Pad-mounted Transformer

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Product Description

Technical Specifications

Core Features & Advantages

Application

Customization Options

TSTY Three Phase Pad Mounted Transformer

The TSTY three phase pad mounted transformer is a compact, tamper‑proof, and highly reliable distribution transformer designed for ground‑level installation. Specifically engineered for underground power networks, this unit steps down medium voltage to utilization voltage, making it the ideal solution for commercial complexes, industrial facilities, renewable energy plants, and public infrastructure. With a robust, weather‑resistant enclosure and compliance with ANSI, IEEE, NEMA, UL, and CE standards, the TSTY three phase pad mounted transformer delivers safe, efficient, and maintenance‑friendly operation for the most demanding outdoor environments.

Standard	ANSI / IEEE, NEMA
Number of Phases	Three phase
Frequency	50Hz / 60Hz
Voltage	Up to 34.5kV
Capacity	75~5,000kVA
Type	Loop-Feed Type
Type	& Radial-Feed Type
Core material	Amorphous or
Core material	Silicon steel
Winding material	Copper or Aluminum
Tank Material	Steel / Stainless steel
Insulating Oil	Mineral Oil or
Insulating Oil	Flame-retardant Oil

Built for Underground Distribution
Designed for ground‑level pad mounting, this transformer seamlessly integrates with underground cable networks, eliminating unsightly overhead lines while providing reliable power to residential communities, commercial centers, and industrial parks.

Tamper‑Proof & Secure Construction
The heavy‑duty steel enclosure is engineered to prevent unauthorized access, making it ideal for public spaces and remote installations where security is a priority.

Low Maintenance & High Efficiency
Advanced core construction using laminated cold‑rolled silicon steel sheets delivers extremely high efficiency with minimal heat generation, reducing cooling requirements and operating costs.

Energy Savings & Environmental Benefits
Meets current energy efficiency standards in the United States and Canada (including DOE 2016 requirements). Higher efficiency extends transformer lifespan and delivers significant cost savings through reduced energy bills and lower total ownership cost.

Loop Feed or Radial Feed Configurations
Choose between loop feed (six HV bushings, dual power supply for redundancy) or radial feed (three HV bushings, single‑circuit supply) to match your network architecture and reliability requirements.

Durable & Weather‑Resistant
NEMA 3R enclosure with advanced coating technology withstands extreme weather conditions, including rain, sleet, snow, and external ice formation, ensuring reliable outdoor service for decades.

Layer‑Wound Coils
Precision layer‑wound coils enhance dielectric strength, reduce heat generation, and improve short‑circuit withstand capability, contributing to longer transformer life.

The TSTY three phase pad mounted transformer is widely deployed across a diverse range of medium‑voltage distribution scenarios:

Commercial & Retail – Shopping centers, office buildings, hotels, hospitals, and mixed‑use developments requiring reliable underground power distribution.
Industrial Facilities – Manufacturing plants, warehouses, logistics centers, and industrial parks with high power demands.
Renewable Energy – Solar farms and wind power collection points, stepping up or stepping down voltage for grid integration.
EV Charging Infrastructure – Power supply for electric vehicle fast‑charging hubs, providing necessary voltage transformation for high‑capacity chargers.
Data Centers – Critical power distribution for server farms and IT infrastructure, where reliability and uptime are paramount.
Utility & Substations – Primary voltage reduction, energy management systems, and underground industrial power distribution.
Railway & Transportation – Power supply for railway signaling, station operations, and traction power systems.
Residential Developments – Underground distribution to residential communities, apartment complexes, and gated neighborhoods.

TSTY offers complete customization to meet your specific project requirements:

Voltage Ratings – Custom primary and secondary voltages to match local grid standards
Capacity – From 75kVA to 5,000kVA (larger ratings available upon request)
Feed Type – Loop feed or radial feed configurations
Core Material – Amorphous alloy (for ultra‑low no‑load losses) or silicon steel
Winding Material – Copper (for higher efficiency) or aluminum (for cost‑effectiveness)
Accessories – Tap changers, temperature gauges, pressure relief devices, oil level gauges, and more