If the tank ground on a single bushing transformer breaks, what happens to the transformer?

When a single bushing transformer experiences a failure such as a break in the tank ground, it can potentially become energized at the primary potential. This occurs because the ground connection is essential for safety and proper operation; if it is compromised, the transformer may lose its reference ground. In this situation, the transformer could elevate to a hazardous potential, potentially causing dangerous conditions.

Maintaining a solid ground connection is crucial for the safe operation of transformers. When the ground is compromised, it can lead to equipment failures, insulation breakdown, and create the risk of electric shock to personnel or equipment connected to the system. Thus, the transformer may not only fail to operate normally but also become energized in an unsafe manner.