Two hot phases in Delta transformers can coexist without causing failure due to the design that allows for balanced load distribution and phase separation. The transformer operates by utilizing the magnetic properties of the core, which helps manage the phase relationships effectively. Engineers emphasize the importance of understanding the distinction between phases and legs in transformer design. Properly configured, the transformer can handle the electrical load without overheating or blowing up. A detailed explanation of the transformer’s operation and phase interactions clarifies this common misconception.