The difference between single-phase transformer and three-phase transformer

The essential difference between a single-phase transformer and a three-phase transformer lies in the difference between the input and output terminals of the transformer, and the number of internal coils. And the number of phases of the applied voltage.

Whether it is a single-phase transformer or a three-phase transformer, one voltage is converted into another voltage through the principle of electromagnetic induction. Both have the characteristics of step-up and step-down.

1. Single-phase transformers: Single-phase transformers are usually used to supply power for residential lighting, sockets, air conditioning and heating needs. By dividing the primary and secondary windings into two equal parts, single-phase transformers can be made more versatile. The two parts of either winding can then be reconnected in a series or parallel configuration.

2. Three-phase transformer: It can be powered by a three-phase circuit including a transformer, which uses a set of three single-phase transformers, or a three-phase transformer. When the conversion of three-phase power involves considerable power, it is more economical to use a three-phase transformer. The unique arrangement of windings and iron core saves a lot of iron. 

3. Three-phase transformer: A three-phase transformer has six windings; three primary schools and three secondary schools. The manufacturer connects the six windings in a delta or star shape. As mentioned earlier, the primary winding and the secondary winding can be connected in a delta or star configuration, respectively. They do not have to be connected in the same transformer in the same configuration. The actual connection configuration used depends on the application.

Definition: Three-phase power supply has two connection configurations: Delta and Wye. Delta and Wye are Greek letters and represent the configuration of conductors on the transformer. In a delta connection, three conductors are connected end to end in a triangle or triangle shape. For a star, all conductors radiate from the center, which means they are connected at a common point.