LMS Substation 3-2 2025 – 400 Free Practice Questions to Pass the Exam

The component of a transmission line that may require improvement due to a history of damaging lightning strikes is the static wire along the length of the line. The static wire, often referred to as ground wire or shield wire, is installed at the top of the transmission line structure primarily to protect the conductors from lightning strikes. This wire helps to intercept lightning and safely carry the resulting current to the ground, preventing damage to the conductors and other components of the transmission line.

If there is a documented history of lightning strikes affecting the transmission line, it indicates that the existing static wire may not be providing adequate protection, leading to a need for improvement. Upgrading or reinforcing the static wire can enhance its capacity to handle direct lightning strikes, thus protecting the integrity of the entire system.

Other components listed, such as insulators, conductors, and support poles, certainly play critical roles in the overall performance and safety of the transmission line, but they do not specifically address the direct impact of lightning as effectively as the static wire does. Improvements to those components may become necessary for reasons other than lightning, such as wear and tear or mechanical stress, but the primary concern related to lightning is fundamentally tied to the static wire's function.