Which type of power connection is recommended for reducing voltage drop across long distances in three-phase systems?

In three-phase systems, using a wye connection is recommended for reducing voltage drop across long distances due to several key factors related to its configuration.

A wye connection, also known as a star connection, utilizes three phases that are connected to a common neutral point. This arrangement allows for a higher line-to-neutral voltage, which can help in reducing the current flowing through the conductors when transmitting power over long distances. Since power loss due to resistance is proportional to the square of the current (I²R losses), by reducing the current, voltage drops along the transmission line are minimized.

Moreover, the neutral wire in a wye system can provide a reference point for balancing loads across the phases, which further enhances the system's stability and reduces potential voltage imbalances. This makes wye connections particularly beneficial in long-distance transmission scenarios where consistent voltage levels are crucial for the operation of connected equipment.

In contrast, other types of connections such as delta or parallel connections may not provide the same benefits for long-distance transmission, particularly in terms of voltage regulation and current reduction. Delta connections may lead to higher line currents, increasing the potential for voltage drops along the line. Series connections are not applicable for power distribution in this context, as they restrict current