Distribution Transformers

The designing of a distribution transformer can be done similarly to small size transformers. The main parts of this transformer mainly include Oil Tank, Conservator, Buchholz Relay, Breather Unit, Oil Indicator, Temperature Detector, Pressure Relief Device, Thermal Relay, Radiator, and Bushing.

Specification

• The oil tank is used to soak the windings by placing it in.
A conservator is arranged above the oil tank at the outside of the transformer frame. It is connected to the main tank with the help of a metallic tube. The oil within the tank can be easily contacted & enlarge throughout loading so that the temperature of the oil can be increased & decrease.
• Buchholz relay is used when a conservator tank is used. Because it indicates errors like loss of oil once it goes low, improper flow of oil between the tank & transformer.
• Breather Unit includes silica gel that absorbs moisture in the oil. It changes its color from blue color to pink color it is not capable to absorb moisture in the oil.
• The oil indicator indicates the level of the oil within the conservatory unit.
• The temperature detector monitors the temperature of the oil. If the temperature of the oil increases to a certain level then the transformer will be disconnected from the service.
• Pressure relief device decreases the pressure within the transformer to avoid an explosion of the transformer. Thermal relay is used as an indicator for the temperature of the winding The radiator is used to increase the transformer’s cooling efficiency.
• The bushing is used to connect the internal windings of the transformer with the help of an exterior electrical network.

Applications

The uses of the distribution transformer include the following.
This transformer changes from high voltage electricity to low voltage electricity, used in homes & businesses. The main function of this is to step down the voltage to provide isolation between two windings like primary & secondary.
This transformer distributes the power to remote areas which are generated from the power plants Generally, this transformer distributes the electrical energy to industries with less voltage under 33KV and 440volts to 220volts for domestic purposes.