An electric system includes a plurality of electric devices, each electric device having a cabinet, a common power source, each electric device being electrically coupled to the common power source, wherein a first electric device includes an arc fault rated cabinet and an arc quenching device, and wherein, in an event of an electric arc occurring in any of the plurality of electric devices, energy of the arc is transferred to the first electric device and the arc quenching device activated.

Embodiments of the disclosure provides a DC socket and a power supply device. A linkage detection unit of the DC socket is disposed adjacent to a positive socket contact or a negative socket contact. A mechanical contact switch is electrically connected between the positive socket contact and a positive power input terminal of the DC socket. A control circuit is electrically connected to the linkage detection unit. A delayed switching-off unit is electrically connected between the positive socket contact and the positive power input terminal, and electrically connected to the control circuit.

A system and method for protecting an electric power distribution system integrated with a hybrid machine-learning model includes a plurality of field protection systems, a plurality of electrical switching circuits, and a local area network. Data from each of the plurality of field protection systems that is connected to the electrical switching circuits that are configured for protecting the electric power distribution system, is transmitted to the cloud. The received data is processed to identify a change in patterns and compute an error related to the HMLM in comparison with the processed data. The HMLM that is implemented in the plurality of FPS is calibrated to minimize the error and send updates to develop a new decision making firmware thereby to control actuation of the plurality of the electrical switching circuits.