What is the consequence of not having a lightning arrestor on transmission lines?

The presence of a lightning arrestor on transmission lines is critical for protecting equipment from the high-voltage surges that can occur during a lightning strike. Without a lightning arrestor, there is a significantly increased risk of equipment damage. Lightning strikes can introduce very high voltages into the electrical system, potentially causing insulation breakdowns, arc-over, or even catastrophic equipment failure. This can lead to costly repairs and prolonged outages, as well as safety hazards for personnel working on or near the infrastructure.

On the other hand, while enhanced electricity generation, reduced power supply, and increased efficiency could all be consequences of various electrical system configurations or operational decisions, they do not address the specific risk of equipment damage that arises in the absence of a lightning arrestor. Thus, the emphasis here is on the protective role that lightning arrestors play in maintaining the integrity of the transmission system and ensuring that equipment remains safe from the effects of lightning-induced overvoltages.