What identifies the transformer with the grounded neutral connected to the X2 terminal?

The correct identification of a transformer with the grounded neutral connected to the X2 terminal is "Grounded." This designation is crucial in understanding transformer connections, particularly in the context of safety and system stability.

When a neutral point is grounded, it helps to ensure that in the event of a fault, the electrical potential of the system does not rise to dangerous levels. This grounding provides a reference point that enhances safety by allowing overcurrent protective devices to operate more effectively. The X2 terminal specifically indicates where this neutral point is connected, making it instrumental in transformer applications.

Other terms like "Heavy," "Light," or "Standard" do not accurately convey the specific relationship between the transformer and its grounding configuration, as they may refer to different types or classes of transformers rather than the explicit grounding aspect. Therefore, the designation "Grounded" is essential for understanding the function and safety features of that specific transformer setup.