What is the meaning of the high voltage side and the low side of the transformer?
High voltage side called high side of the low voltage side called low side
In general, the "high voltage side" refers to the "side of the high voltage side" (high pressure side) "low side" from the power supply to the primary side of the transformer (low voltage outlet) The From the wiring is also basically able to distinguish: high side (into the end) is generally "△" connection, low side (outlet) is generally "Y" connection.
Under normal circumstances the role of the transformer is to high-voltage transmission (saving material to reduce the loss) over the power to reduce the voltage (there are boost in the power plant substation) to meet the conventional use of electrical equipment standards. Therefore, in the conventional step-down transformer input (also called once) is the high-pressure side, the output (also called the second) is the low side.
