Which connection configuration is less likely to have a neutral in a 3Ø, 3-W system?

In a three-phase, three-wire (3Ø, 3-W) system, the delta connection is characterized by its typical arrangement of the three phases connected in a loop, forming a closed triangular circuit. This configuration inherently does not provide a neutral point, as there is no central point where the phases are connected to a neutral line. This makes it less likely to have a neutral conductor in a delta connection compared to other configurations.

In contrast, the star connection, often used in three-phase systems, includes a neutral point where the three phase conductors converge, allowing for the provision of a neutral wire. This arrangement is particularly useful for supplying single-phase loads, as it allows for greater flexibility in balancing loads.

Branch connections and mixed configurations can also involve neutral conductors depending on how the systems are organized, but the delta configuration is explicitly designed to operate without a neutral, focusing on delivering three-phase power without the need for a return path for unbalanced loads.

Thus, since delta connections do not involve a neutral and are designed to operate solely with three phases, they are less likely to have a neutral when compared to the other configurations mentioned.