What is the typical electrical capacity of subtransmission lines?

Subtransmission lines are designed to carry electricity from higher-voltage transmission lines to distribution networks, typically operating within a voltage range that allows for efficient power transfer while minimizing losses. The typical electrical capacity for these lines falls within the range of 69 to 161 kV.

This range is significant because it effectively bridges the gap between high-voltage transmission lines, which generally operate above 161 kV, and the lower-voltage distribution lines, which are usually below 69 kV. By operating at this capacity, subtransmission lines can effectively deliver power over moderate distances to substations or other distribution points without incurring excessive energy loss, ensuring that the voltage remains suitable for further distribution to end users. This capability is essential for maintaining the reliability and efficiency of power supply systems.

Understanding the role and characteristics of subtransmission lines is crucial in electrical utility operations, indicating their importance in the overall design of electrical grid systems.