Fuses having a melamine-coated-steatite foam filler are described. In particular, melamine-coated-steatite foam filler for use in a fuse comprising steatite coated in a melamine compound (e.g., plasticized melamine resin) and then heated to form crystalline foam filler are described. The foam filler may comprise steatite of substantially 3 times the melamine compound by weight and may be heated and then cooled to form the foam filler.

A sub contact part and a direct current (DC) relay including the same are disclosed. The sub contact part according to one aspect of the present disclosure may include a body part having spaces spaced apart from each other therein and; and a plurality of sub connectors each accommodated in the spaces of the body part and electrically connected to an external control power source and a core part, wherein the body part includes a plurality of legs each having the spaces spaced apart from each other therein and extending in one direction; and a bridge extending between the plurality of legs and coupled to each of the plurality of legs.

A sub contact part and a direct current (DC) relay including the same are disclosed. The sub contact part according to one aspect of the present disclosure may include a body part having spaces spaced apart from each other therein and; and a plurality of sub connectors each accommodated in the spaces of the body part and electrically connected to an external control power source and a core part, wherein the body part includes a plurality of legs each having the spaces spaced apart from each other therein and extending in one direction; and a bridge extending between the plurality of legs and coupled to each of the plurality of legs.

Fuses having a melamine-coated-steatite foam filler are described. In particular, melamine-coated-steatite foam filler for use in a fuse comprising steatite coated in a melamine compound (e.g., plasticized melamine resin) and then heated to form crystalline foam filler are described. The foam filler may comprise steatite of substantially 3 times the melamine compound by weight and may be heated and then cooled to form the foam filler.

An electrical switch element is disclosed. The electrical switch element includes a housing having a switch chamber, an opening to the switch chamber, electrical switch contacts arranged in the switch chamber, and at least one positive-locking counter-element extending at least partially around the opening. The electrical switch element also includes a cover having at least one positive-locking element engaging the at least one positive-locking counter-element, the cover extending over the opening.

An electrical switch element is disclosed. The electrical switch element includes a housing having a switch chamber, an opening to the switch chamber, electrical switch contacts arranged in the switch chamber, and at least one positive-locking counter-element extending at least partially around the opening. The electrical switch element also includes a cover having at least one positive-locking element engaging the at least one positive-locking counter-element, the cover extending over the opening.

The present disclosure relates to an arc extinguishing system for contactor and a contactor. The arc extinguishing system includes: an arc extinguishing chamber, accommodating a plurality of arc extinguishing grids, and an extension direction of each of the plurality of arc extinguishing grids being perpendicular to an extension direction of the movable contact; an arc striking piece, electrically connected to the stationary contact and configured to extend toward the arc extinguishing chamber, so that the arc generated upon the movable contact and the stationary contact being separated moves along the arc striking piece toward the arc extinguishing chamber.

The present disclosure relates to an arc extinguishing system for contactor and a contactor. The arc extinguishing system includes: an arc extinguishing chamber, accommodating a plurality of arc extinguishing grids, and an extension direction of each of the plurality of arc extinguishing grids being perpendicular to an extension direction of the movable contact; an arc striking piece, electrically connected to the stationary contact and configured to extend toward the arc extinguishing chamber, so that the arc generated upon the movable contact and the stationary contact being separated moves along the arc striking piece toward the arc extinguishing chamber.

A conduction-breaking device breaks conduction between a pair of devices in an electric circuit. The conduction-breaking device includes a conductive body having a cuttable portion, an arc-extinguishing chamber having a pair of fixed blades, a gas generator, a cutting member having a pair of movable blades, and a deforming mechanism. When the cuttable portion is cut at two positions by the fixed blades and the movable blades, the cuttable portion forms a separated piece, which is separated from the electric circuit, and first and second remaining portions, which remain connected with the electric circuit. The separated piece has cut ends at opposite ends. The deforming mechanism deforms the separated piece such that the cut ends of the separated piece are located on a leading side in a moving direction of the cutting member with respect to a part of the separated piece between the cut ends.