What is the connection type of a 13800 3-phase 4-wire 10 kVA transformer?

The connection type of a 13800 3-phase 4-wire 10 kVA transformer is indeed a Wye connection. In a Wye connection, the three phase winds are connected to a common point (the neutral point), which allows for both three-phase and single-phase loads to be supplied from the same transformer. This type of connection is particularly beneficial for providing a stable neutral point that can accommodate residential and commercial loads, which often require a neutral wire for safe operation.

The 3-phase 4-wire configuration indicates that there is a neutral wire present, which further supports the understanding that it operates in a Wye configuration. A Wye connection allows for a line-to-neutral voltage that is lower than the line-to-line voltage, enabling versatile use of equipment and ensuring that loads can be balanced effectively across phases. This setup is common in distribution systems, especially for transformers serving various types of load configurations.

The other connection types, such as Delta or Open Delta, do not provide a neutral wire and would not support the same flexibility in load balancing or allow for the stability needed in delivering both three-phase and three-phase single-phase loads. Single-phase connections, while useful in certain applications, do not relate to a three-phase system and would only cater