A high breaking capacity chip fuse including a bottom insulative layer, a first intermediate insulative layer, a second intermediate insulative layer, and a top insulative layer disposed in a stacked arrangement in the aforementioned order, a fusible element disposed between the first and second intermediate insulative layers and extending between electrically conductive first and second terminals at opposing longitudinal ends of the bottom insulative layer, the first intermediate insulative layer, the second intermediate insulative layer, and the top insulative layer, wherein the first and second intermediate insulative layers are formed of porous ceramic.

Thermal-mechanical fatigue assessment systems and methods include a controller operable to estimate a temperature of the conductor having a non-linear resistance based on an ambient temperature input and a current input for current flow through the conductor when connected to an energized electrical power system. A state of fatigue of the conductor may be assessed in view of an estimated first temperature differential between the conductor and an arc extinguishing medium surrounding the conductor, an estimated temperature differential between the temperature of the arc quenching medium and the ambient temperature, and the estimated temperature of the conductor.

Thermal-mechanical fatigue assessment systems and methods include a controller operable to estimate a temperature of the conductor having a non-linear resistance based on an ambient temperature input and a current input for current flow through the conductor when connected to an energized electrical power system. A state of fatigue of the conductor may be assessed in view of an estimated first temperature differential between the conductor and an arc extinguishing medium surrounding the conductor, an estimated temperature differential between the temperature of the arc quenching medium and the ambient temperature, and the estimated temperature of the conductor.

Provided is a fuse device used for high rating and high current applications excellent in impact resistance at the time of current interruption, and capable of preventing falling off of the case. The fuse device includes: a base member; a cover member fitted to the base member and covering a surface of the base member; and a fuse element mounted on the surface of the base member; wherein one of the base member and the cover member is provided with a side wall intersecting with the plane of the surface of the base member and including an opening formed therein, and the other of the base member and the cover member is provided with a fitting projection projecting outward from a plane intersecting with the plane of the surface of the base member and fitted into the opening of the side wall.

Provided is a fuse device used for high rating and high current applications excellent in impact resistance at the time of current interruption, and capable of preventing falling off of the case. The fuse device includes: a base member; a cover member fitted to the base member and covering a surface of the base member; and a fuse element mounted on the surface of the base member; wherein one of the base member and the cover member is provided with a side wall intersecting with the plane of the surface of the base member and including an opening formed therein, and the other of the base member and the cover member is provided with a fitting projection projecting outward from a plane intersecting with the plane of the surface of the base member and fitted into the opening of the side wall.

Provided is a battery that may include a first terminal or cable, a second terminal or a cable, a thermal fuse configured to connect to the first terminal or cable and the second terminal or cable, a first sleeving layer that is disposed on the thermal fuse, and that is configured to muffle an arc explosion of the thermal fuse and encapsulate molten material generated by the arc explosion of the thermal fuse, and a second sleeving layer that is disposed on the first sleeving layer, and that is configured to encapsulate the molten material generated by the arc explosion of the thermal fuse that penetrates the first sleeving layer. An overcurrent protection system and a sleeving are also provided.

A protective element includes: a fuse element which includes a blowout portion between a first end portion and a second end portion, and is energized in a first direction; and a case having a housing portion housing the blowout portion therein. A length in a thickness direction in a cross section perpendicular to the first direction of the blowout portion is less than or equal to a length in a width direction perpendicular to the thickness direction in the cross section. A first wall surface and a second wall surface that face each other in the thickness direction are provided in the housing portion. A distance in the thickness direction between the first wall surface and the second wall surface is 10 times or less the length in the thickness direction of the blowout portion.

A protective element includes: a fuse element which includes a blowout portion between a first end portion and a second end portion, and is energized in a first direction; and a case having a housing portion housing the blowout portion therein. A length in a thickness direction in a cross section perpendicular to the first direction of the blowout portion is less than or equal to a length in a width direction perpendicular to the thickness direction in the cross section. A first wall surface and a second wall surface that face each other in the thickness direction are provided in the housing portion. A distance in the thickness direction between the first wall surface and the second wall surface is 10 times or less the length in the thickness direction of the blowout portion.

The invention relates to a device for interrupting an electrical current circuit, more particularly a device of this kind that can safely perform a disconnection in a current range up to 100 kA. The device comprises a pyrotechnic switch (PTS) and a safety fuse, wherein the PTS and the safety fuse are connected in series and wherein the PTS can be actively triggered. The PTS is preferably triggered as a result of a current flowing in the current circuit only if the current measured in the current circuit has exceeded a particular value for a particular period of time (filtering time of the PTS).

Provided is a fuse device capable of maintaining the insulation performance while using a fuse element having a considerable size to improve rating. The fuse device includes a fuse element 2 and a case 3 for housing the fuse element 2, and the case 3 has a resin portion 4 having a surface to be melted by heat accompanying blowout of the fuse element 2 on at least a part of an inner wall surface 8a facing the inside 8 housing the fuse element 2.