15-167kVA,35kV Single-Phase Pad-Mounted Transformer

The DINGXING Single-Phase Pad-Mounted Transformer is a ground-level, single-phase distribution transformer housed in a robust, lockable, tamper-resistant and weatherproof metal enclosure. Designed for outdoor installation on a concrete pad, it serves as a critical component in the electrical grid — typically stepping down higher distribution voltages (15 kV, 25 kV or 35 kV) to standard single-phase utilization voltages (120/240 V or 120/208 V) used to power residential homes, small businesses and light commercial loads.

Available in seven standard ratings from 15 kVA to 167 kVA, the unit delivers low loss, high durability and a sealed, reliable construction that withstands harsh outdoor environments.

• Compact and Easy to Install — Ground-level pad-mounted design with a small footprint; simple cable connection, no special foundation required.
• Low Loss and High Durability — Optimized core and winding design reduce no-load and load losses; robust construction extends service life and lowers operating cost.
• Sealed and Reliable — Fully sealed metal enclosure is lockable, tamper-resistant and weatherproof, ensuring safe operation in outdoor environments.
• Flexible Wiring Options — Multiple primary and secondary voltage combinations to suit different grid and load requirements; customizable terminals.
• Simple and Cost-Effective — Streamlined design with minimal maintenance requirements, delivering excellent value for residential and light commercial distribution.

Standard Ratings & Parameters

Loss, Dimension & Weight (7 Standard Ratings)

Normal Environmental Conditions

• Upper limit of ambient air temperature: +40°C

• Lower limit of ambient air temperature: −25°C

• Altitude: ≤ 1000 m

• Relative air humidity: ≤ 90%

• Outdoor wind speed: ≤ 35 m/s

• Ground inclination: ≤ 5°, no severe vibration or impact

• No conductive dust, no explosion hazard, no corrosive metal or electrical components

Special Working Conditions

For use beyond the above limits (extreme temperature, high altitude, corrosive or explosive atmosphere, etc.), please contact DINGXING Electric for a custom design.

• Residential service — Single-family homes, multi-unit dwellings and residential subdivisions.

• Small businesses & light commercial — Shops, offices, restaurants and small retail outlets.

• Rural distribution feeders — Single-phase overhead or underground distribution in rural networks.

• Distributed single-phase loads — Lighting, irrigation pumps, small machinery in agricultural settings.

• Industrial parks — Distributed single-phase supply for light industrial users.

• Urban residential areas — Compact pad-mounted substations for city neighborhoods.

• Commercial areas & high-rise buildings — Auxiliary or service single-phase supply.

• Temporary construction sites — Portable, robust single-phase power for construction camps.

Q1. What is a single-phase pad-mounted transformer? It is a ground-level, single-phase distribution transformer installed outdoors on a concrete pad. The unit is housed in a lockable, tamper-resistant, weatherproof metal enclosure, typically stepping down 15/25/35 kV distribution voltage to standard single-phase 120/240 V or 120/208 V for residential and light commercial use.

Q2. What is the available capacity range? DINGXING single-phase pad-mounted transformers cover seven standard ratings: 15, 25, 37.5, 50, 75, 100 and 167 kVA.

Q3. What primary voltages are supported? Standard primary voltages include 34500GrdY/19920 V, 13800GrdY/7957 V, 13200GrdY/7620 V and 12470GrdY/7200 V. Other primary voltages are available on request.

Q4. What secondary voltages are available? Standard secondary voltages include 120–240 V (single-phase 120/240) and 240–480 V (single-phase 240/480). 347 V and 600 V options are also available.

Q5. Is the transformer suitable for outdoor installation? Yes. The lockable, weatherproof metal enclosure is designed for outdoor ground-level installation on a concrete pad, with operating temperature from −25°C to +40°C, relative humidity up to 90% and wind speed up to 35 m/s.

Q6. What are the typical no-load and load losses? No-load loss ranges from 50 W (15 kVA) to 350 W (167 kVA); load loss ranges from 195 W (15 kVA) to 1410 W (167 kVA). Specific values for each rating are listed in the technical specifications table.

Q7. Can the unit be customized for special applications? Yes. Primary voltage, secondary voltage, terminal configuration and enclosure color can be customized. For environmental conditions beyond the standard limits (altitude > 1000 m, ambient temperature outside −25°C to +40°C, corrosive or explosive atmospheres, etc.), please contact DINGXING for a tailored design.

Q8. What are the typical applications? The single-phase pad-mounted transformer is widely used for residential service, small businesses, light commercial loads, rural distribution feeders, and distributed single-phase loads in industrial parks, urban residential areas, commercial districts, high-rise buildings and temporary construction sites.

Need a single-phase pad-mounted transformer for your project? Contact JiangSu Dingxin Electric Co., Ltd. [email protected] for datasheets, IEEE type-test reports, OEM/ODM service and competitive pricing.