What kind of grounding method is typically used in substations to enhance safety?

Common grounding is typically used in substations to enhance safety because it helps to ensure that all equipment within the substation is referenced to the same ground potential. This consistent grounding method minimizes the risk of potential differences between different pieces of equipment and helps prevent electrical shock hazards for personnel working in or near the substation.

Common grounding systems help reduce the likelihood of stray currents and ensure proper fault detection and response. By connecting all grounding points in a network to a single reference point, it provides a reliable path for fault currents to flow, thereby facilitating the operation of protective devices and improving overall system safety.

In contrast, other grounding methods may not provide the same level of safety across different equipment in a substation environment. For example, isolated grounding might leave certain apparatus without a common reference point, which can lead to dangerous voltage differences. Therefore, common grounding is the preferred method in substations to promote safety and operational reliability.