A hybrid interrupter member for an electrical circuit, the interrupter member including a static interrupter component and an electromechanical interrupter component. The static component is mounted on a support carrying electrical contacts for the static component, the support being configured, on receiving a command to interrupt, to move in such a manner as to withdraw at least one of the electrical contacts from its respective pin, thereby forming the electromechanical interrupter component.

Fuse load-break switch (1) for low-voltage high-power fuses, a fuse contact pair for receiving a fuse (5A, 5B, 5C) being provided within a housing (2) of the fuse load-break switch (1) for each current phase to be disconnected, characterized in that a thermal power loss brought about by the fuses (5A, 5B, 5C) is dissipated into at least one heat dissipation duct (3) provided laterally on the housing (2) of the fuse load-break switch (1).

A plate stack in a cooling device for hot gases generated in electric installation devices, preferably in low-voltage power switches. The plate stack is arranged in the flow path of the hot switching gases into a window, the plate stack having identical plates made of a material with a high heat conductivity. Each of the plates is provided with spacer elements which correspond to the spacing of the plates, and the plates are arranged in the stack such that the orientation of the plates changes one after the other.

An arc chamber for a DC circuit breaker includes an entry side adapted to receive an electric arc, which was generated outside of the arc chamber and which propagates in a forward direction, a plurality of stacked splitter plates, and at least one inhibitor barrier. The at least one inhibitor barrier is arranged on the entry side to inhibit a reverse propagation of the electric arc out of the arc chamber in a reverse direction. DC circuit breaker comprising an arc chamber. Use of an arc chamber with a circuit breaker in a DC electrical system.

An arc extinction apparatus according to an embodiment of the present disclosure comprises a chamber unit, a division unit, a filter unit, and a cover unit. A discharge port is formed in the chamber unit such that a fluid in the chamber unit is discharged to the outside. An insertion groove is provided on inner faces of the chamber unit that face each other. The division unit is coupled to the inside of the chamber unit. In addition, the division unit divides a path of the fluid discharged through the discharge port into multiple paths. The filter unit is disposed in the discharge port and filters out at least one predetermined material from the fluid passing through the discharge port. The cover unit comprises a plurality of exhaust pipes and is coupled to the discharge port from the outside of the filter unit.

A breaking device for interrupting current, the breaking device including an electrically conducting outer member; an electrically conducting inner member arranged radially inside the outer member with respect to a breaking axis; and an electrically insulating or semiconducting breaking tube arranged radially between the outer member and the inner member with respect to the breaking axis, the breaking tube being arranged to move along the breaking axis from a starting position to a protruding position in which the breaking tube protrudes from a space within the outer member for interrupting a current between the outer member and the inner member by means of the breaking tube.

A low voltage switch pole including an insulating casing defining an internal space with a contact area and an arc extinguishing area, a fixed contact assembly and a movable contact assembly being position in the contact area, the movable contact assembly being movable between a closed position in which it is into contact with the fixed contact assembly and an open position in which it is spaced apart from the fixed contact assembly, an arc chamber including a plurality of substantially parallel metallic plates being position in the arc extinguishing area, wherein fixed contact assembly is provided with a contact support, a contact surface contacting the movable contact assembly in the closed position and positioned on the contact support, and a conductive expansion plate positioned on the contact support and extending toward the arc chamber, and wherein the fixed contact assembly is provided with a gasifying plate which is directly mounted on the conductive expansion plate.

A low voltage switch pole including an insulating casing defining an internal space with a contact area and an arc extinguishing area, a fixed contact assembly and a movable contact assembly being position in the contact area, the movable contact assembly being movable between a closed position in which it is into contact with the fixed contact assembly and an open position in which it is spaced apart from the fixed contact assembly, an arc chamber including a plurality of substantially parallel metallic plates being position in the arc extinguishing area, wherein fixed contact assembly is provided with a contact support, a contact surface contacting the movable contact assembly in the closed position and positioned on the contact support, and a conductive expansion plate positioned on the contact support and extending toward the arc chamber, and wherein the fixed contact assembly is provided with a gasifying plate which is directly mounted on the conductive expansion plate.

A fuse including a fuse body having a main body portion formed of a dielectric material, a plurality of arc chambers formed in the main body portion, the arc chambers arranged in a matrix configuration, a conductor extending through the main body portion and intersecting the arc chambers, the conductor having bridge portions disposed within the arc chambers, the bridge portions being mechanically weaker than other portions of the conductor and configured to melt and separate upon the occurrence of an overcurrent condition in the fuse.

An improved switching device includes a guide configured to reduce undesired movement of the switching element. The guide includes an upper portion configured to receive the switching element and a lower portion configured to receive a spring. The upper portion defines a seat to receive the switching element and includes at least one resilient tab to retain the switching element within the guide. The lower portion defines an opening in which the spring is positioned, where the spring is seated, in part, against the switching element and against the guide. The guide includes guide portions configured to engage a housing on the switching device to prevent rotation of the switching element within the switching device. The switching element further includes protrusions configured to engage each side of the guide and to prevent longitudinal movement of the switching element within the housing.