Single-Phase Pad-Mounted Transformer
The 15–34.5kV Single-Phase Pad-Mounted Transformer is an oil-immersed distribution transformer designed for underground power networks, residential communities, commercial buildings, and utility projects. Available from 25kVA to 500kVA, it features a compact outdoor enclosure, reliable protection, and customizable loop-feed or radial-feed configurations in accordance with IEEE standards.
Warranty 1 year
Product Overview
The Single-Phase Pad-Mounted Transformer is an oil-immersed distribution transformer developed for underground power distribution systems. It is widely used in residential communities, commercial developments, industrial parks, solar power projects, and urban underground networks.
Compared with conventional pole-mounted transformers, it integrates the high-voltage compartment, low-voltage compartment, and transformer body within a fully enclosed steel housing. This compact ground-mounted structure improves operational safety, installation appearance, and maintenance convenience.
DHDL manufactures single-phase pad-mounted transformers in accordance with IEEE C57.12.38 and IEEE C57.12.28. Voltage, capacity, impedance, winding material, insulation medium, protection devices, enclosure material, and cable connection arrangements can be customized for different utility and project requirements.
Core Configuration
Technical Specifications
Standard configurations are listed below. Voltage, capacity, impedance, winding material, protection devices, enclosure structure, and accessories can be customized according to project requirements.
| Product Type | Oil-immersed Single-Phase Pad-Mounted Transformer |
|---|---|
| Applicable Standards | IEEE C57.12.38 / IEEE C57.12.28 |
| Rated Capacity | 25–500kVA |
| Primary Voltage | 13.2kV / 13.8kV / 24kV / 34.5kV |
| Secondary Voltage | 120/240V or 240/120V |
| Phase | Single Phase |
| Frequency | 50Hz / 60Hz |
| Cooling Method | ONAN – Oil Natural Air Natural |
| Connection Symbol | Ii0 |
| Feed Configuration | Loop Feed or Radial Feed |
| High-Voltage Configuration | Dead Front or Live Front |
| Tap Changer | No-load Tap Changer (NLTC) |
| Tap Range | ±2 × 2.5% |
| Impedance | 2%–4% |
| Winding Material | Copper or Aluminum |
| Installation | Outdoor Ground-mounted Installation |
Note: The above specifications represent standard configurations. Electrical parameters, losses, dimensions, enclosure material, insulation fluid, and accessories can be customized according to utility standards and specific project requirements.
Product Features
IEEE-Compliant & Customizable Design
Designed according to IEEE C57 standards and customizable in voltage, capacity, impedance, insulation fluid, protection devices, and enclosure configuration.
Compact Integrated Structure
The transformer body and high- and low-voltage compartments are integrated into one compact enclosure for convenient installation and reduced site requirements.
Enhanced Lightning Protection
An optimized insulation structure with optional surge arresters and fuse protection improves lightning impulse resistance and operational reliability.
High Efficiency & Low Loss
High-quality grain-oriented silicon steel and optimized winding design help reduce no-load and load losses while lowering long-term operating costs.
Applications
Utility Distribution Networks
Reliable transformer solutions for urban and rural power distribution systems, helping ensure stable voltage conversion and continuous power supply.
Industrial Facilities
Suitable for factories, workshops, production lines, mining sites, and industrial power systems that require long-term stable operation.
Renewable Energy Projects
Applied in solar power plants, wind farms, energy storage stations, and microgrid systems for power conversion and distribution.
AI Data Center Power Infrastructure
Suitable for data center campus substations, medium-voltage power intake systems, and reliable power distribution infrastructure supporting high-density computing loads.
A pad-mounted transformer is installed on a concrete foundation and connected through underground cables for higher safety and cleaner appearance, while a pole-mounted transformer is mainly used for overhead line distribution.
Yes, it can be customized according to customer requirements, including voltage level, capacity, impedance, tap changer, accessory configuration, and cabinet structure.
Yes, stainless steel enclosure, anti-corrosion coating, and FR3 eco-friendly insulating oil are available for high-salt, high-humidity, and harsh coastal environments.
Optional accessories include surge arresters, Bay-O-Net fuses, ELSP current-limiting fuses, load break switches, oil level gauges, thermometers, pressure relief valves, grounding terminals, and stainless steel enclosures.
Please provide the capacity in kVA, high voltage, low voltage, frequency, destination country, applicable standard, special accessory requirements, purchase quantity, and project application scenario so we can recommend a suitable solution quickly.
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