What action should be taken if a transformer leaks after being de-energized?

When a transformer leaks after being de-energized, sealing the area to contain the fluid is crucial for several reasons. First, transformer fluid can be hazardous and may pose environmental risks. By sealing the area, you help prevent the spread of the fluid, which could contaminate soil or water sources, thereby protecting the environment and ensuring public safety.

Additionally, containing the fluid prevents slips and falls, which could occur if the fluid spreads in the vicinity. It also allows for safer inspection and remediation efforts, as workers can address the leak without the risk of exposure to the fluid or creating further hazards.

In contrast, ignoring the leak disregards the potential harm it could cause. Similarly, inspecting for potential re-energization without first addressing the leak could lead to safety risks for personnel involved. Relying on authorities to address the issue might delay necessary precautions and could increase the risk of harm to the surrounding area while waiting for intervention. Therefore, sealing the area is the most immediate and responsible action to take when dealing with a leak from a transformer.