Overhead pole-mounted single-phase transformer is a cylindrical design with small size and low manufacturing cost, and is widely used in European and American countries.
Introduction:
Overhead pole-mounted single-phase transformer is designed for single-phase. It is fixed on the utility pole using a bracket or a metal frame. Generally, it has no shell packaging and is directly exposed to the natural environment. It has a small capacity range and is more suitable for living in scattered areas, often used in rural and suburban areas. It is generally a step-down transformer, which converts the high voltage of the transmission line into a low voltage available to residents, and also ensures the stability and safety of transmission.
Structural composition:
1. Core:
Overhead pole-mounted single-phase transformer is generally made by stacking silicon steel sheets and is the core of the transformer, which can greatly enhance the efficiency of electromagnetic induction.
2. Winding:
Windings are divided into high-voltage windings and low-voltage windings, and there are two types of materials to choose from. Customers can freely choose copper wire windings or aluminum wire windings. The performance of copper wire material is better and its service life is longer.
3. Housing and cooling System:
The transformer casing adopts a fully sealed design and is made of iron or stainless steel. Mineral oil needs to be filled inside to facilitate insulation and heat dissipation.
4. Terminal blocks and protective devices:
High-voltage terminals need to be equipped with fuses for short-circuit protection, and low-voltage terminals should be fitted with lightning arresters to prevent lightning strikes. If required, a tap changer can be configured to adjust the voltage for better application.
Advantages and Characteristics:
Low cost:
The structural design of overhead pole-mounted single-phase transformer is relatively simple, and the manufacturing cost and installation cost are also very low.
High flexibility:
It is very small in size, light in weight, convenient for transportation and direct installation. It is suitable for more complex terrain areas and only needs to be installed on a utility pole.
Easy to maintain:
Directly exposed to the environment, regular troubleshooting is relatively simple. If replacement is needed, the impact on the overall power grid will be very small.
Load dispersion:Unidirectional design, simple structure, low energy consumption and high efficiency.
Safety and maintenance precautions:
Insulating oil management:
It is necessary to regularly check the oil level and quality of insulating oil to prevent insulation failure and accidents caused by oil leakage or aging.
Lightning protection:
Regularly check whether the lightning arrester is working properly to avoid winding damage caused by the accumulation of rainy days.
Regular inspection on time:
Keep the casing intact and ensure the stability of the terminal blocks. Regularly check the usage of fuses to avoid adverse consequences caused by poor contact or overheating.
Safety Warning:
The transformer needs to have a high-voltage warning to prevent other people from approaching. No climbing. There is a risk of electric shock.