What type of ground-fault protection equipment device is identified as a neutral ground strap type?

The neutral ground strap type is specifically designed to provide ground-fault protection by establishing a direct electrical connection between the neutral point of a transformer and the ground. This connection allows for the detection of ground faults—situations where electrical current unintentionally flows to the ground. By utilizing a neutral ground strap, this type of equipment can effectively monitor and respond to these faults, enhancing safety in electrical systems.

This method is particularly critical because it contributes to creating a safer electrical environment by reducing shock hazards and preventing potential damage to equipment. The neutral ground strap type can also facilitate the operation of certain protection systems, ensuring that faults are detected and mitigated swiftly.

In contrast, the other options have distinct functionalities. For example, ground-fault circuit interrupters are designed for residential and commercial applications, ensuring quick disconnection in the event of a fault but do not specifically identify as neutral ground strap devices. Current transformer types involve methods of sensing currents flowing through conductors for protective measures but do not utilize a physical neutral ground strap connection. Additionally, PLC-controlled devices refer to programmable logic controllers that can manage various automated processes but do not pertain specifically to ground-fault protection through neutral grounding.