A: Classified by installation method:
l Pole-mounted Transformer;
l Pad-mounted Transformer;
l Compact Substation Transformer.
Classification by insulation method:
l Oil-immersed Transformer;
l Dry-type Transformer.
Classified by number of phases:
l Single phase Transformer;
l Three phase Transformer.
A: Distribution Transformer is the important device in the power distribution network. Its main function is to step down the medium voltage, such as 11kV and 33kV, in the transmission link to the low voltage, such as 400V and 240V, of which the voltage is suitable for end users to ensure the power consumption safety and stable power supply for households, industrial and commercial users.
According to the clear provisions of the U.S. Federal Regulations, the main parameters of a distribution transformer are as follows:
The input voltage shall not exceed 34.5kV, and the output voltage shall not exceed 600V
The rated operating frequency is 60Hz
The capacity of liquid-immersed type ranges from 10kVA to 2500kVA, and the capacity of dry type type ranges from 15kVA to 2500kVA
It does not include special purpose transformers such as autotransformers, isolation transformers and rectifier transformers
Different from the power transformers in the power transmission network, distribution transformers are optimized for efficiency in low load scenarios and can operate continuously for a long time. Common types such as oil immersed type, pole mounted type and dry type type are widely applicable to various distribution scenarios such as residential communities, commercial buildings and industrial plants.
