What is a potential downside of operating a transformer beyond its nameplate ratings?

Operating a transformer beyond its nameplate ratings can lead to excessive heating, which is a significant concern in transformer performance and longevity. The nameplate ratings represent the designed capacity in terms of voltage, current, and power that the transformer can handle safely without overheating. When these limits are exceeded, the transformer can generate more heat than it is designed to dissipate, leading to problems such as insulation breakdown, winding damage, and ultimately, equipment failure.

Therefore, managing transformer loads within their specific nameplate ratings is crucial for maintaining efficiency, performance, and the overall safety of electrical systems.