Star/Star transformers and Load Balance

Star/Star transformers are also known as Y/Y transformers. They are used to step down or step up the voltage level in a system. These transformers have three primary windings and three secondary windings. The primary windings are connected in a star configuration, and the secondary windings are also connected in a star configuration.

Load balance refers to the distribution of power among the loads in a system. A balanced load is one where the power is distributed equally among the loads. An unbalanced load is one where the power is distributed unequally among the loads.

Working of Star/Star Transformers

When a star/star transformer is connected to a balanced load, the power is distributed equally among the loads. This means that the voltage across each load is the same, and the current through each load is also the same. As a result, the transformer works efficiently, and there is no overheating or overload of any of the windings.

However, when a star/star transformer is connected to an unbalanced load, the power is distributed unequally among the loads. This means that the voltage across each load is different, and the current through each load is also different. This can lead to overheating and overload of one or more of the windings, which can damage the transformer.

Conclusion

In conclusion, star/star transformers work satisfactorily when the load is balanced only. If the load is unbalanced, the transformer may not work efficiently and may be damaged. Therefore, it is important to ensure that the load is balanced before connecting a star/star transformer to the system.