What is a necessary action to ensure the safety of personnel during maintenance in substations?

To ensure the safety of personnel during maintenance in substations, it is critical that only trained staff are present. This is because individuals who have received specialized training possess the knowledge and skills to recognize hazards, operate equipment safely, and respond effectively to emergencies. They are familiar with the electrical systems and protocols specific to the substation, which minimizes the risk of accidents and ensures that maintenance tasks are performed correctly.

Presence of untrained personnel could lead to serious accidents or ineffective maintenance, as they may not understand the potential dangers or the correct procedures to follow. Training also enables staff to maintain a safety-first mindset, which is essential in high-voltage environments like substations. This practice is a fundamental aspect of occupational health and safety standards in electrical work.