What is distribution transformer? Features, Application for distribution transformer.

What is distribution transformer?

Farady Electric is a leading manufacturer of electrical equipment, including distribution transformers. A distribution transformer, also known as a step-down transformer, is a crucial component in the transmission and distribution of electricity.

At its most basic definition, a distribution transformer is a device that converts high voltage electricity to low voltage for safe and efficient distribution. This transformation is essential as high voltage electricity is unsafe for everyday use due to the risk of electric shock and equipment damage. The distribution transformer works by stepping down the voltage from the high-voltage transmission lines to the lower voltage used in homes, offices, and other buildings.

Farady Electric has been at the forefront of distribution transformer technology for over two decades. The company prides itself on its commitment to innovation, quality, and safety in all its products. With its state-of-the-art manufacturing facilities and a team of experienced engineers, Farady Electric has become a trusted name in the industry.

How does distribution transformer work?

A distribution transformer is an electrical device that converts high-voltage electricity from the power grid into lower-voltage electricity suitable for use in homes and businesses. It is typically located on utility poles or underground and is responsible for supplying electricity to individual buildings.

Step 1: High-Voltage Electricity Supply

The distribution transformer receives high-voltage electricity from the transmission lines of the power grid. The voltage of this electricity can range from 11,000 volts to 33,000 volts, depending on the power grid.

Step 2: Step-down Process

The process of stepping down the voltage in a distribution transformer typically involves multiple stages. The primary winding of the transformer is connected to the high-voltage transmission line, which can carry voltages ranging from 69,000 volts up to 500,000 volts. The transformer is designed to reduce this high voltage to a lower level, typically ranging from 2,400 to 35,000 volts, depending on the specific distribution system requirements.

Step 3: The Ferromagnetic Core

The iron core is made of high-quality, magnetic material such as silicon steel. This material has low electrical resistance and helps in transferring the electrical energy from the primary coil to the secondary coil.

Step 4: Magnetic Field

When high-voltage electricity flows through the primary coil, it creates a magnetic field around the iron core. This magnetic field then induces an electric current in the secondary coil, which is connected to the consumer’s electrical network.

Step 5: Step-Down Ratio

The ratio between the primary and secondary coils determines the voltage output of the transformer. For instance, if the step-down ratio is 10:1, the transformer will convert 10,000 volts into 1,000 volts.

Step 6: Cooling Type (e.g. ONAN, ONAF, ONAN/ONAF)

The cooling type of a distribution transformer is another crucial aspect that affects its performance and lifespan. There are several types of cooling methods, such as ONAN (oil natural air natural), ONAF (oil natural air forced), and ONAN/ONAF (combined) cooling. Each method has its own advantages, and the selection is based on factors such as the transformer size, the surrounding environment, and the expected load.

Step 7: Regulating the Output

Distribution transformers have a built-in tap changer that allows for the regulation of the output voltage. This helps in adjusting the transformer’s output to compensate for fluctuations in the power grid’s voltage. Transformers are designed to have a high voltage regulation, typically within 5%, in order to ensure a consistent power supply to the end users.

Step 8: Final Output

After adjusting the output voltage, the lower-voltage electricity is then distributed through underground or overhead cables to individual homes and businesses. This provides a safe and reliable source of electricity for everyday use. The final output of a distribution transformer is the low-voltage electricity suitable for distribution to homes and businesses. Once the high-voltage electricity is stepped down to a lower voltage, it is then distributed through power lines to local substations, where it is further reduced in voltage before being delivered to the end users.


Three Phase Pad Mounted Transformer

Three Phase Oil Immersed Transformer

Solar Transformer

Single Phase Pole Mounted Transformer

Kiosk Compact Substation

Dry Type Transformer


Features of distribution transformer

1. Voltage Regulation

It is designed to provide a specific output voltage, which can be stepped up or down depending on the application. This voltage remains constant even when the load changes, ensuring stable power supply.

2. High Efficiency

Distribution transformers are highly efficient, with most designs achieving 95-98% efficiency. This means that the transformer minimizes energy losses during the transformation process.

3. Compact Size

It is typically smaller than power transformers, making them easier to install and transport. This also allows for more flexibility in their placement, as they can be mounted on utility poles or placed in underground vaults.

4. Different Cooling Options

Distribution transformers can be designed with different types of cooling methods, including air, oil, or liquid-immersed cooling. Each method has its advantages and is chosen based on the transformer’s specific application and operating conditions.

5. Overload and Short Circuit Protection

It is  equipped with protection devices that prevent damage in case of overloading or short circuits. These devices include fuses, circuit breakers, and temperature sensors, which help to maintain the transformer’s safe operating conditions.

6. Noise Reduction

Distribution transformers have noise reduction features, such as sound-absorbing materials or special designs to minimize noise levels. This is important in areas where transformers are located close to residential or commercial buildings.

7. Durability

It is built to withstand harsh environmental conditions, such as extreme temperatures, moisture, and vibrations. They are also designed to have a long service life, often lasting 25 years or more.

8. Cost-Effective

It is relatively low-cost compared to other types of transformers, making them a cost-effective solution for supplying electricity to residential and commercial areas.

9. Customizable

Distribution transformers can be designed and manufactured to meet specific requirements, such as different voltage levels, frequency, or installation conditions. This allows for more flexibility in their application and use.

10. Safety Features

It is equipped with safety features, such as grounding systems, to prevent electric shock and other hazards. They are also designed to minimize the risk of fire or explosions.

Application of distribution transformer

In the electric power system, a distribution transformer is used to alter the voltage of electricity being transported from the power plant to the end users. The main purpose of a distribution transformer is to decrease the high voltage electricity received from the power plant to a lower voltage suitable for use in homes, offices, and businesses.

1. Power Distribution: Distribution transformers play a crucial role in delivering electricity to homes, offices, and other commercial buildings. They are installed on poles or in underground vaults to step down the high voltage electricity from transmission lines to a lower level for safe and efficient distribution.

2. Industrial Applications: Industries require a large amount of electricity to power their machines and equipment. Distribution transformers are essential in supplying this electricity at a suitable voltage level for various industrial processes.

3. Renewable Energy Integration: With the increase in the use of renewable energy sources such as solar and wind power, distribution transformers are essential for connecting these sources to the electric grid. They step down the voltage from these sources to match the grid’s electrical system.

4. Rural Electrification: In remote areas, distribution transformers are used to provide electricity to households and small communities. They help in reducing the voltage supply from the main power grid, making it possible for these areas to receive electricity.

5. Commercial and Residential Buildings: Distribution transformers are also used in buildings to provide a suitable voltage level for lighting, appliances, and other electrical devices. They help in improving the efficiency and safety of electricity use in these settings.

6. Electrical Vehicles Charging: With the rise in popularity of electric vehicles, distribution transformers are being used for charging stations. They play a critical role in converting the high voltage from power grids to the lower voltage needed for charging electric vehicles.

Why choose Farady electric for distribution transformer?

Choosing a reliable and trustworthy supplier is essential when it comes to purchasing distribution transformers. At Farady electric, we are committed to providing high-quality products and services to our customers. With years of experience in the industry, we have established a strong reputation for our top-notch distribution transformers. Below are some reasons why you should choose Farady electric for your distribution transformer needs.

Production Equipment:
We believe that using the latest and advanced technology is crucial to producing high-quality products. That is why we have invested in state-of-the-art production equipment to ensure the production of efficient and reliable distribution transformers. Our equipment includes automatic winding machines, core cutting machines, tapping machines, vacuum impregnation machines, and more. With these advanced machines, we can manufacture transformers of various sizes and specifications to meet the needs of our customers.

Quality Inspection:
At Farady electric, we are dedicated to manufacturing distribution transformers that adhere to international standards, such as IEC, GB, and ANSI. To ensure that our products meet these standards, we have a strict quality inspection process in place. Our transformers undergo multiple quality checks during the manufacturing process, from raw material inspection to final product testing. We use advanced instruments and techniques to test the performance, durability, and safety of our transformers. This rigorous quality control system ensures that our customers receive only the best quality products.

We take pride in our innovative and patented designs that are the result of our relentless pursuit of excellence. Our engineers and technicians are continuously working to improve our products and processes, resulting in several patents over the years. These patents have enabled us to provide unique and efficient distribution transformers that set us apart from our competitors. Our patented designs have been highly praised and trusted by our customers, making us a preferred choice for distribution transformers.

R&D Capabilities:
Our strong research and development capabilities have been the driving force behind the success and growth of Farady electric. With a dedicated team of engineers and technicians, we are constantly researching and developing new and improved products to meet the changing needs of our customers. Our R&D team works closely with our customers to understand their requirements and provide customized solutions. Our continuous improvement and innovation have enabled us to become one of the top suppliers of distribution transformers in the market.

Product Delivery:
Meeting the delivery schedule is crucial in the transformer industry, as any delay can cause significant inconvenience for our customers. At Farady electric, we understand the importance of timely delivery and have a well-established system in place to ensure prompt delivery of our products. We have a large production capacity, and with the help of our efficient management team, we can deliver bulk orders within the stipulated time frame.

Quality Control System:
At Farady electric, quality is our top priority, and we have implemented a comprehensive quality control system to ensure that our customers receive the best products every time. We adhere to strict quality standards and are certified by ISO 9001, ensuring that our products meet global quality requirements. Our quality control system also includes regular training programs and workshops for our employees to enhance their skills and knowledge, ensuring that they are always up to date with the latest industry developments.

Staff Training:
Our employees are the backbone of Farady electric, and we believe in investing in their training and development. We have a highly skilled and experienced workforce who are continuously trained to keep up with the latest technologies and trends in the industry. Through regular training and skills enhancement programs, we ensure that our employees have the necessary expertise to provide our customers with the best products and services.

In conclusion, at Farady electric, we have the production equipment, quality inspection processes, patented designs, strong R&D capabilities, on-time product delivery, stringent quality control system, and well-trained staff to provide our customers with high-quality distribution transformers. With our commitment to innovation, quality, and customer satisfaction, we are confident that we can meet all your distribution transformer needs. Choose Farady electric and experience the difference in product quality and service excellence.

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