What is a derived Neutral?

A derived neutral refers specifically to the connection established through a "zigzag" transformer. This type of transformer configuration is used primarily in electrical systems to create a neutral point that can be grounded for safety and stability.

The zigzag transformer allows for the conversion of phase voltages and is instrumental in systems where a neutral point is not readily available, supporting the balance of the phases in multi-phase power systems. By providing this derived neutral, the transformer helps manage unbalanced loads and facilitates the grounding of the system, thereby enhancing safety and operational efficiency.

In contrast, the other options describe concepts that do not correspond to the specific role and function of a derived neutral. The direct connection to ground in any circuit is more general and doesn't specify the use of a transformer or the derived nature of the neutral. The grounding point in a low-voltage system refers to safety grounding processes rather than the derived nature produced by a zigzag transformer. Lastly, while balancing voltage in three-phase systems is a relevant topic, it does not specifically define the derived neutral concept, which is distinctly related to the approach utilized by a zigzag transformer.