PGC Power Substation Part 1 Practice Exam 2025 - Free Power Substation Practice Questions and Study Guide

The correct classification for voltage levels above 230 kV but below 765 kV is Extra High Voltage (EHV). This category is defined specifically to cover high transmission voltages that facilitate the long-distance transfer of electricity while minimizing losses. EHV is crucial for reducing the size of conductors and enhancing the efficiency of power transmission.

This classification stems from international standards, where voltages are divided into ranges for clarity and safety in electrical engineering. The designation of Extra High Voltage typically starts at 230 kV, thus encompassing up to 765 kV, which is essential for ensuring manageable design and operational standards in power systems.

While High Voltage generally refers to voltages typically from 1 kV up to 230 kV, and Medium Voltage accounts for the range from 1 kV to 35 kV, Super High Voltage is not a standard classification widely recognized in the same context as EHV, and thus it is less applicable for levels around 230 kV to 765 kV. Understanding these classifications helps in the design, operation, and safety protocols of electrical transmission networks.