The main nameplate parameters and significance of transformers?

The main nameplate parameters and significance of transformers?

The nameplate of the transformer indicates the performance, technical specifications and usage occasions of the transformer, and is used to meet the user’s choice. The main technical data that is usually paid attention to are:

(1) Kilovolt amphibious number of rated capacity. That is, the output capability of the transformer under the rated state. For example, the rated capacity of a single-phase transformer = U-wire × I-wire; the capacity of a three-phase transformer = U-wire × I-wire.

(2) Rated voltage volts. The terminal voltage of the primary coil and the terminal voltage of the secondary coil are respectively marked. Note that the terminal voltage of the three-phase transformer refers to the voltage U-line value.

(3) Rated current ampere. It refers to the I-wire value of the wire current that the primary coil and secondary coil allow for long-term passage under the rated capacity and allowable temperature rise.

(4) 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 only have one set of coils each with high and low voltage, and are only for single-phase use, while three-phase transformers have Y/△ type. In addition to the above technical data, there are also the rated frequency of the transformer, the number of phases, temperature rise, the impedance percentage of the transformer, etc.