As electricity demand continues to grow worldwide, distribution networks require reliable, flexible, and economical solutions to deliver power safely to end users. In rural areas, residential communities, and low-density regions, traditional ground-mounted transformers may not always be the most practical option due to space limitations and installation costs.
The pole-,ounted single-phase transformer has become an essential component in modern distribution systems. With its compact structure, easy installation, and dependable operation, this transformer provides an efficient solution for converting medium-voltage electricity into low-voltage power for residential and small commercial users.
Widely adopted by utilities around the world, pole-mounted single-phase transformers play a critical role in improving electricity accessibility, enhancing grid reliability, and supporting the expansion of distribution infrastructure.
Product Overview of pole-mounted single-phase transformer
The series comprises D16 series 50Hz and 60Hz single-phase pole-mounted oil-immersed transformers rated 5kVA to 500kVA for 35kV and below, designed and manufactured in accordance with ANSI and IEC 76 standards, and exported to regions such as Central and South America and Southeast Asia.
Single-phase pole-mounted distribution transformer. For power supply areas with widely dispersed users and low electricity consumption, a new single-phase two-wire or three-wire supply mode using single-phase pole-mounted distribution transformers has been adopted, to satisfy requirements for small capacity, dense distribution points, and short supply radius. The device is suitable for areas with low load density and widely dispersed loads.
In western countries and in regions such as Southeast Asia and North and South America, single-phase transformers are widely used as distribution transformers. They can reduce the length of low-voltage distribution lines, reduce line losses, and improve power supply quality. These products are suitable for rural power grids, remote mountainous areas, widely dispersed villages, agricultral production, lighting and power applications, and can also be used for railway systems and pole-mounted distribution lines in urban power grid energy-saving retrofit projects, either in single-phase operation or in banks of three single-phase units for three-phase operation and improve power supply quality. These products are suitable for rural power grids, remote mountainous areas, widely dispersed villages, agricultral production, lighting and power applications, and can also be used for railway systems and pole-mounted distribution lines in urban power grid energy-saving renovations, including pole-mounted distribution lines. The transformers can operate in single-phase mode or be grouped into three single-phase units for three-phase operation.
The product features are as follows: allows the length of low-voltage distribution lines to be reduced, leading to reduced line losses and improved power supply quality. It is suitable for rural grids, remote mountainous areas, widelt dispersed villages, agricultrual production, lighting and power applications, and can also be used for railways. The device can operate in single-phase mode or as a bank of three single-phase units for three-phase operation.
Working Principle of pole-mounted single-phase transformer
A pole-mounted single-phase transformer is a small device installed on a utility pole. Its operating principle is based on the law of electromagnetic induction, and it is mainly used to convert high-voltage power into low-voltage power suitable for residential users or small commercial equipment.
Structural features pole-mounted single-phase transformer
The pole-mounted single-phase transformer uses a cylindrical oil tank. A tank cover is provided at the upper part of the tank body, with a tank bottom at the lower part. The outer wall is fitted with radiators matched and fixed to the tank body(provided only with large-capacity units for heat dissipation; not for small-capacity units). A pair of clamp mounting brackets is arranged on the outer wall of the tank, distributed vertically with spacing between the upper and lower brackets; mounting slots are provided in the brackets. Uniformly distributed connecting plates are provided at the upper end of the tank outer wall, while a grounding terminal and an oil drain valve are provided at the lower end. A temperature sensor is also arranged on the outer wall of the tank. The cylindrical oil tank structure of the pole-mounted single-phase transformer is compact, easy to install, and improves overall safety.
The single-phase distribution transformer features a simple structure, small size, and low losses. It can be pole-mounted and installed directly near the load center, shortening the low-voltage supply radius, reducing losses, and providing greater convenience for supplying power to users with small power loads and for urban street lighting.
main parameters of pole-mounted single-phase transformer
| Rated Capacity(kVA) | Voltage Combination and Tapping Range | ||
| High Voltage(kV) | High-Voltage Tap Range(%) | Low Voltage(kV) | |
| 10 |
10 11 12 35 |
± 2 * 2.5%± 5% |
0.12/0.24 |
| 15 | |||
| 25 | |||
| 37.5 | |||
| 50 | |||
| 75 | |||
| 100 | |||
| 167 | |||
| 250 | |||
Applications of pole-mounted single-phase transformers
Suitable for applications such as widely dispersed residential areas and street lighting where there are no three-phase power loads; especially suitable for rural or mountainous with low load density.
Conclusion
The pole-mounted single-phase transformer remains a vital solution for modern electricity distribution networks. Its compact design, reliable performance, and cost-effective installation make it an ideal choice for residential, rural, and commercial power applications.
As global demand for reliable electricity continues to increase, pole-mounted transformers will continue to support the expansion of efficient, flexible, and sustainable distribution systems worldwide.