Single Phase Pole Transformer

 I. Product Overview

Single - phase transformers are widely used as distribution transformers in Western developed countries, Southeast Asia, and North and South America. In power distribution networks with scattered power supplies, single - phase transformers have significant advantages. They can reduce the length of low - voltage distribution lines, minimize line losses, and improve power supply quality.

This transformer adopts an efficient and energy - saving wound core structure design and is installed in a pole - mounted suspension method. It has a small volume and low infrastructure investment. It can reduce low - voltage line losses by more than 60%. It is suitable for rural power grids, remote mountainous areas, scattered villages, agricultural production, lighting, and power - driven applications. It can also be used for pole - mounted distribution lines in railway and urban power grid energy - saving renovations.

 II. Structural Features

1. The high - voltage winding is wound with high - quality round copper wire coated with polyurethane paint, and the low - voltage winding is wound with cable paper. Dotted adhesive paper is used for inter - layer insulation. It starts to melt at a certain temperature during the coil drying process, generating an adhesive effect. As the temperature rises, it begins to solidify again, firmly bonding adjacent layers of the winding into a fixed unit, preventing the displacement of the winding wires and ensuring the safety and reliability of the insulation structure.

2. The iron core is made by rolling grain - oriented silicon steel sheets or non - alloy silicon steel sheets into a single - phase wound core, which ensures that the magnetic flux direction is consistent with the grain orientation of the silicon steel sheets, giving full play to the excellent properties of the material. The no - load loss is far lower than the standard requirements. Moreover, it is fixed with special iron core curing paint, which further effectively reduces the noise level of the transformer.

3. A cylindrical oil tank is used, and the oil tank has a fully - sealed structure, enhancing operational reliability and requiring no maintenance during normal operation.

4. Other features:

One (or two) high - voltage bushings protrude from the tank cover, and a current - limiting fuse is hidden inside the bushing. One (or two) lightning arresters are installed on the tank wall, with the end close to the outlet end of the high - voltage bushing and connected by a copper strip. A primary and secondary circuit breaker is installed inside the tank, with an external operating handle, overload reset device, and signal lamp installed on the tank wall. The low - voltage bushings are led out from the tank wall, and X2 is equipped with a grounding device. One end of the single - bushing high - voltage winding is led out through the high - voltage bushing, and the other end is grounded. The single - phase pole - mounted distribution transformers developed by our company are mainly for overseas export projects. The capacity can be customized from 3 to 333KVA, the input voltage can be 33000/30000/17321/13800/7620/6930/6350V, the frequency can be 50HZ or 60HZ, and it complies with standards such as IEEE C57, ANSI C57, IEC76, and GB10318.