Power transformers can present hazards due to high voltage, high current, elevated temperature and stored energy. Risks include electric shock, arc flash, thermal burns and oil ignition in oil-filled units. Modern installations mitigate these risks through grounded enclosures, fencing, clearance zones, fire suppression, interlocks and warning signage. Condition monitoring and routine testing further reduce failure probability. With proper PPE, lock-out/tag-out procedures and safety standards, the residual risk for trained personnel remains low.