What is the voltage on insulated overhead shield wires generally held to?

Insulated overhead shield wires are typically held at the midsection ground point voltage. This arrangement helps to minimize the potential difference between the shield wire and the ground, reducing the risk of electrical breakdown and enhancing safety. By maintaining the voltage at the midsection ground point, the electrical characteristics of the system are balanced, which is crucial for preventing disturbances and ensuring the reliable functioning of power lines.

This practice also aids in providing an effective grounding mechanism that helps protect the equipment and personnel from lightning strikes and other electrical surges. The insulation provides a safeguard against induced voltages while maintaining the shield wire at a stable reference point, which contributes to the overall reliability of the transmission system.