Triphasic (or three-phase) power systems are common in electrical distribution networks for several reasons:

1. **Efficiency**: Three-phase systems are more efficient than single-phase systems for transmitting large amounts of power over long distances. They provide a more constant power transfer, reducing the need for heavy conductors and minimizing power loss.

2. **Balanced Loads**: In a three-phase system, power is delivered in a manner that allows the loads to be evenly distributed among the phases, reducing the overall stress on the system. This balanced loading results in smoother operation and less wear and tear on equipment.

3. **Motor Operation**: Three-phase power is particularly well-suited for powering motors, which are widely used in industrial and commercial applications. Three-phase motors are more efficient, have higher power output, and are more reliable than their single-phase counterparts.

4. **Industrial Applications**: Many industrial machines and equipment are designed to operate on three-phase power. Using a three-phase supply simplifies the design and operation of such equipment.

5. **Flexibility**: Three-phase systems offer flexibility in terms of voltage levels and power distribution configurations, allowing for optimization based on specific requirements and constraints.

6. **International Standardization**: In many parts of the world, including Europe, Asia, and parts of North America, three-phase power is the standard for industrial and commercial electrical systems. Standardization facilitates compatibility and interoperability across different regions and industries.

Overall, triphasic 220V systems provide a reliable, efficient, and versatile solution for a wide range of electrical power applications.