Power Distribution Transformer

A distribution transformer is also known as a typical kind of isolation transformer. The main function of this transformer is to alter the high voltage to the normal voltage like 240/120 V to use in electric power distribution. In the distribution system, there are different kinds of transformers available like single phase, 3-phase, underground, pad-mounted, pole-mounted transformer.

electric distribution transformer

• This transformer changes from high voltage to low voltage, used in homes and businesses.
• The main function of this is to reduce the voltage to provide isolation between the two windings as primary and secondary.
• This transformer distributes electricity to remote areas generated from power plants.
• Generally, this transformer distributes electrical energy to industries with less than 33KV voltage and 440V to 220V for domestic purposes.

Distribution transformers are normally located at a service drop, where wires run from a utility pole or underground power lines to a customer's premises. They are often used for the power supply of facilities outside settlements, such as isolated houses, farmyards or pumping stations at voltages below 30 kV. Another application is the power supply of the overhead wire of railways electrified with AC. In this case single phase distribution transformers are used.

The number of customers fed by a single distribution transformer varies depending on the number of customers in an area. Several homes may be fed from a single transformer in urban areas. Rural distribution may require one transformer per customer, depending on mains voltage. A large commercial or industrial complex will have multiple distribution transformers. In urban areas and neighborhoods where the primary distribution lines run underground, padmount transformers, transformers in locked metal enclosures mounted on a concrete pad, are used. Many large buildings have electric service provided at primary distribution voltage. These buildings have customer-owned transformers in the basement for step-down purposes.

Distribution transformers are also found in the power collection networks of wind farms, where they step up power from each wind turbine to connect to a substation that may be several miles (kilometres) distant.

100 kva distribution transformer factory

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