An explosion-proof over-current protection element includes a fuse body, a ceramic shell, an explosion-proof layer, an arc-extinguishing layer, and a protection layer. The fuse body includes two electrodes and a fuse wire between the electrodes. The fuse body is integrally formed. The fuse wire is arranged within a cavity of the ceramic shell. The electrodes protrude from inside of the cavity toward outside of the cavity to contact an outer wall of the ceramic shell. The explosion-proof layer is arranged within the cavity and contacts a bottom surface of the cavity. The arc-extinguishing layer is arranged within the cavity and covers the fuse wire. The explosion-proof layer and the arc-extinguishing layer are made of different materials. The protection layer is arranged within the cavity. The arc-extinguishing layer is located between the explosion-proof layer and the protection layer.

An explosion-proof over-current protection element includes a fuse body, a ceramic shell, an explosion-proof layer, an arc-extinguishing layer, and a protection layer. The fuse body includes two electrodes and a fuse wire between the electrodes. The fuse body is integrally formed. The fuse wire is arranged within a cavity of the ceramic shell. The electrodes protrude from inside of the cavity toward outside of the cavity to contact an outer wall of the ceramic shell. The explosion-proof layer is arranged within the cavity and contacts a bottom surface of the cavity. The arc-extinguishing layer is arranged within the cavity and covers the fuse wire. The explosion-proof layer and the arc-extinguishing layer are made of different materials. The protection layer is arranged within the cavity. The arc-extinguishing layer is located between the explosion-proof layer and the protection layer.

A cut-off element for electrical isolation of an electrical component or for opening of a circuit in overload has two terminal contacts, an insulating housing and a fuse element which is located within the insulating housing. In the normal state of the cut-off element, the two terminal contacts (2,3) are connected to one another in an electrically conductive manner via the fuse element. In the cut-off element, reliable isolation of an electrical component, in particular an overvoltage arrangement, is possible by the insulating housing being formed of two parts which are connected to one another and the first part of the housing, in case of overload, being isolated from the second part of the housing so that the connection of the two terminal contacts is broken via the fuse element.

A cut-off element for electrical isolation of an electrical component or for opening of a circuit in overload has two terminal contacts, an insulating housing and a fuse element which is located within the insulating housing. In the normal state of the cut-off element, the two terminal contacts (2,3) are connected to one another in an electrically conductive manner via the fuse element. In the cut-off element, reliable isolation of an electrical component, in particular an overvoltage arrangement, is possible by the insulating housing being formed of two parts which are connected to one another and the first part of the housing, in case of overload, being isolated from the second part of the housing so that the connection of the two terminal contacts is broken via the fuse element.

In one embodiment, a method includes, by a switch device, determining a position of an on/off input selector, the on/off input selector being located within a switch device, in response to determining the position of the on/off input selector is in an off position, operating one or more solid state switches to suspend current to one or more load-side terminals, determining whether the one or more load-side terminals of the switch device are electrically isolated, in response to determining the one or more load-side terminals of the switch device are electrically isolated, generating a prompt via a graphical user interface, and receiving, via the graphical user interface, one or more inputs, the one or more inputs including at least a request for safety lockout instructions.

In one embodiment, a method includes, by a switch device, determining a position of an on/off input selector, the on/off input selector being located within a switch device, in response to determining the position of the on/off input selector is in an off position, operating one or more solid state switches to suspend current to one or more load-side terminals, determining whether the one or more load-side terminals of the switch device are electrically isolated, in response to determining the one or more load-side terminals of the switch device are electrically isolated, generating a prompt via a graphical user interface, and receiving, via the graphical user interface, one or more inputs, the one or more inputs including at least a request for safety lockout instructions.

Power line protection coordination schemes using pivotable multi-fuse assemblies includes multiple power line fuse assemblies deployed on a power line. Each fuse assembly includes multiple fuses that can be pivoted about an electrical connection point. Multiple fuses across the multiple power line fuse assemblies are tagged with a common visual code. Multiple such common visual codes are defined. Each common visual code maps to a protection coordination scheme to manage power flowed to loads on the power line. In turn, each protection coordination scheme is mapped to a direction of flow of power. Based on a chosen direction, a protection coordination scheme is identified. When the identified scheme is deployed, all fuses tagged with the visual code mapped to the scheme are deployed by pivoting fuses about the electrical connection point.