Transformer knowledge

What are the main components of a transformer
Transformer components are mainly composed of iron cores and coils, in addition to oil tanks, oil pillows, insulating sleeves and tap heads.

What are the benefits of transformer oil
The role of transformer oil is:
(1) Insulation effect
(2) Heat dissipation
(3) Eliminate the arc effect

What is the nameplate of a transformer? What are the main technical data?
The nameplate of the transformer indicates the performance, technical specifications and application occasions of the transformer, and is used to meet the user's selection. Usually, the main technical data to be paid attention to are:
(1) KVA of rated capacity. That is, the output capacity of the transformer in the rated state. Such as single-phase transformer rated capacity = U line × I line; three-phase transformer capacity = U line × I line.
(2), rated voltage volts. The terminal voltage of the primary coil and the terminal voltage of the secondary coil (when not connected to the load) are respectively marked. Note that the terminal voltage of the three-phase transformer refers to the line voltage U line value.
(3), rated current amperage. Refers to the line current I line value that the primary coil and secondary coil allow long-term passage under the conditions of rated capacity and allowable temperature rise.
(4), the voltage ratio. Refers to the ratio of the rated voltage of the primary coil to the rated voltage of the secondary coil.
(5), wiring method. Single-phase transformers have only one set of high and low voltage coils, which are only available for single-phase use, while three-phase transformers have Y/△ type. In addition to the above technical data, there are the rated frequency of the transformer, the number of phases, the temperature rise, the impedance percentage of the transformer, etc.