Overview

Pad Mounted ZGS Series I Three Phase Oil Immersed Transformer is a three-phase ground-mounted distribution transformer designed for medium-voltage power distribution systems. It is mainly used to step down medium-voltage electricity from utility distribution networks to low-voltage power for industrial facilities, commercial buildings, residential communities, public infrastructure, utility projects, renewable energy systems, and outdoor distribution networks.

As a pad mounted transformer, the ZGS Series I is installed on a concrete pad or prepared outdoor foundation. Compared with pole-mounted overhead transformers, pad mounted transformers are easier to access from ground level and are widely used in underground distribution systems, commercial power networks, industrial parks, residential communities, and public utility projects. The enclosed cabinet structure helps protect the transformer and its connection components while supporting safer installation in outdoor environments.

The ZGS Series I is a three-phase oil immersed transformer. Transformer oil is used as the insulation and cooling medium, helping to dissipate heat and maintain stable electrical performance during operation. Oil immersed distribution transformers are widely used because of their mature technology, reliable insulation performance, strong load capacity, and long service life. For projects requiring higher capacity and three-phase power supply, the ZGS Series I offers a practical and dependable solution.

According to the UL certified oil transformer product list, the Pad Mounted ZGS Series I – Three Phase transformer has capacity coverage up to 5000kVA and high-voltage coverage from 11kV to 17kV. It is listed under UL List No. E540521 and is designed with reference to IEEE standards such as IEEE C57.12.00, IEEE C57.12.28, and IEEE C57.12.90. These standards are commonly used for distribution transformer design, construction, enclosure integrity, testing, and performance verification.

This transformer is suitable for international projects that require UL listed three-phase pad mounted transformer solutions. It can be used by power utilities, electrical contractors, EPC companies, industrial users, commercial property developers, infrastructure contractors, and renewable energy project developers. The product can be customized according to project requirements, including rated capacity, primary voltage, secondary voltage, frequency, impedance, tapping range, connection group, enclosure structure, bushing arrangement, protection accessories, cable connection method, coating color, and nameplate requirements.

Product Advantages

1. UL Listed Oil Transformer for International Projects
The ZGS Series I Three Phase Pad Mounted Transformer is included in the UL certified oil transformer product list. The UL listing helps increase product credibility in international markets and is especially valuable for projects that require recognized certification, reliable quality, and professional electrical compliance.

2. High Capacity up to 5000kVA
With capacity coverage up to 5000kVA, this transformer is suitable for larger three-phase power distribution applications. It can support industrial plants, commercial complexes, utility distribution networks, infrastructure facilities, and other projects with higher load demand.

3. Suitable for 11kV–17kV Distribution Networks
The product supports high-voltage coverage from 11kV to 17kV, making it suitable for many medium-voltage distribution networks. This voltage range is commonly used in utility and project power systems and can be configured according to customer requirements.

4. Three-Phase Power Distribution Solution
The transformer is designed for three-phase power systems. It is suitable for supplying three-phase loads such as motors, pumps, HVAC systems, production lines, commercial building systems, industrial equipment, and large power distribution networks. Three-phase supply provides better efficiency and stability for medium and large electrical loads.

5. Pad Mounted Outdoor Installation
The ground-mounted pad installation design makes the transformer suitable for outdoor distribution systems. It can be installed on a prepared foundation, close to the load center or distribution point. This helps reduce cable distance, simplify maintenance, and improve the layout of outdoor power systems.

6. Oil Immersed Cooling and Insulation Design
The transformer uses oil as the cooling and insulation medium. Oil immersed technology provides reliable heat dissipation and insulation performance, helping the transformer operate continuously under normal load conditions. This design is widely accepted in distribution transformer applications.

7. Enclosed and Protected Cabinet Structure
The pad mounted structure includes an enclosed outdoor cabinet, which helps protect internal transformer components and cable connections. This design can improve safety for public, commercial, and outdoor installation environments while reducing the risk of accidental contact with electrical parts.

8. Designed with IEEE Standard References
The product is designed with reference to IEEE C57.12.00, IEEE C57.12.28, IEEE C57.12.90 and related requirements. These references help support transformer construction, testing, enclosure performance, and long-term operation for professional power distribution projects.

9. Convenient Ground-Level Access
Compared with overhead transformers, pad mounted transformers allow easier access for inspection, cable connection, maintenance, and replacement. Ground-level access can reduce maintenance difficulty and improve service efficiency for utilities and electrical contractors.

10. Flexible Project Customization
The transformer can be customized for different market and project requirements. Optional configurations may include voltage ratio, capacity rating, tap changer, bushing arrangement, fuse protection, load break switch, pressure relief device, oil level indicator, temperature indicator, grounding device, coating system, and labeling.

Product Specifications

Product Applications

Pad Mounted ZGS Series I Three Phase Oil Immersed Transformer is widely used in medium-voltage distribution systems that require reliable three-phase power transformation. It is suitable for outdoor ground-mounted installation and can be applied in utility, industrial, commercial, infrastructure, and energy projects.

In utility distribution networks, this transformer can be used as a local distribution transformer to supply three-phase power to residential communities, commercial areas, industrial parks, and public facilities. It helps convert medium-voltage power from the utility grid into low-voltage power for end users and downstream distribution equipment.

In industrial projects, the ZGS Series I transformer is suitable for manufacturing plants, machinery factories, mining facilities, chemical plants, steel plants, cement plants, packaging factories, and production lines. These applications often require reliable three-phase power for motors, pumps, compressors, HVAC systems, automation systems, and production equipment. With capacity coverage up to 5000kVA, the transformer can support higher load requirements.

In commercial buildings and property developments, the transformer can be used for shopping centers, office parks, hotels, schools, hospitals, exhibition centers, business complexes, and mixed-use developments. It can provide power for lighting, elevators, HVAC systems, pumps, emergency power systems, tenant distribution panels, and other building loads.

In infrastructure projects, Pad Mounted ZGS Series I transformers can be used in airports, railway stations, metro systems, water treatment plants, ports, municipal facilities, communication stations, and transportation hubs. These projects require stable power transformation and outdoor equipment that can be integrated into the site power distribution network.

In renewable energy and distributed generation projects, the transformer can be used in solar power plants, wind power projects, energy storage systems, EV charging stations, and microgrid systems. It can help connect medium-voltage networks with low-voltage distribution systems and provide reliable power transformation for auxiliary loads, site equipment, and distribution circuits.

In outdoor distribution systems, the pad mounted cabinet structure makes the transformer suitable for installation near load centers, underground distribution routes, or outdoor electrical service areas. It is especially useful where overhead installation is not preferred or where ground-mounted equipment is required by project design.

Overall, Pad Mounted ZGS Series I Three Phase Oil Immersed Transformer is a reliable, high-capacity, and flexible distribution transformer solution. With UL listed product information, capacity coverage up to 5000kVA, high-voltage coverage from 11kV to 17kV, and IEEE standard references, it is suitable for international utility, industrial, commercial, infrastructure, and renewable energy power distribution projects.