An active/passive fuse module including a base, a busbar disposed on the base and including a fuse element extending over a cavity in a top surface of the base and having a plurality of weak points formed therein, a pyrotechnic interrupter (PI) disposed atop the base and including a piston disposed within a shaft above the fuse element, the piston having an edge with a geometry that corresponds to a geometry of a pattern defined by the weak points in the fuse element, a first pyrotechnic ignitor coupled to a controller and configured to detonate and force the piston through the fuse element upon receiving an initiation signal from the controller, and a second pyrotechnic ignitor coupled to the busbar by a pair of leads and configured to detonate and force the piston through the fuse element upon an increase in voltage across the leads.

A fuse assembly includes a fuse element, a first terminal, a second terminal, a socket, and a capsule. The fuse element is disposed between first and second end bells. The first terminal includes a first bell portion, a first socket portion, and a first capsule portion, the first bell portion being connected to the first end bell. The second terminal includes a second bell portion, a second socket portion, and a second capsule portion, the second bell portion being connected to the second end bell. The first socket portion and the second socket portion are integrated through the socket. The first capsule portion and the second capsule portion are integrated through the capsule. The socket is seated atop the capsule to create an interior chamber inside which the fuse element is disposed.

In example implementations, a printhead die is provided. The printhead die includes a substrate, a chamber layer formed on the substrate, a plurality of printing fluid ejection chambers coupled to opposite sides of the chamber layer and along a length of the chamber layer, and a top hat layer formed on the chamber layer and the plurality of printing fluid ejection chambers. The chamber layer includes a void to store printing fluid. The top hat layer includes an initial unsupported top hat layer portion over the void, wherein the initial unsupported top hat layer portion comprises a first end that is narrower than a second end.

A lightning protection spark gap assembly comprises: a lighting protection spark gap having a first main connection and a second main connection, wherein a first voltage line of a supply network is connectable to the first main connection and a second voltage line of the supply network is connectable to the second main connection; a safety fuse device which is triggerable and which is connectable between the first or second voltage line and the corresponding main connection of the lightning protection spark gap, wherein at least one current path leading via the lighting protection spark gap is formable between the first voltage line and the second voltage line during operation; an indicator device for detecting a current flow in the current path or a corresponding portion of the current flow in the current path and for mechanically or electrically delayed triggering of the safety fuse device.

A direct current electric circuit interrupting switch assembly is disclosed that comprises a pyroswitch assembly, which comprises at least two pyroswitches, which are connected in parallel with each other and are each per se integrated in its respective electrically conductive branch together forming a second branch of the primary electric conductor the switch assembly, with a first, preceding pyroswitch and a second, subsequent, or last pyroswitch. Each of said pyroswitches comprises an interrupting member, by means of which each circuit with each of the pyroswitches is either connected during normal operation or is interrupted by displacing each corresponding interrupting member into another position, when a pre-determined condition is met.

A battery system is described with methods and systems for thermally isolating a battery module experiencing thermal runaway. In one embodiment, a thermal actuator can cut a busbar coupling neighboring battery modules together, thereby preventing or slowing the spread of thermal runaway. In other embodiments, a fusible material can joint portions of a busbar. High temperatures can cause the fusible material to melt off of the busbar portions and thereby break the thermal or electrical conductivity between busbar portions and neighboring modules.

A fuse includes a housing. A bus bar extends through the housing. An arc interrupter positioned inside the housing. A biasing element is compressed between the housing and the arc interrupter to bias the arc interrupter toward the bus bar to separate two portions of the bus bar during circuit interruption to mitigate arcing from one portion of the bus bar to the other portion of the bus bar. The bus bar includes a pocket defined therein wherein the bus bar is of a first material, and wherein a second material is seated within the pocket. In another aspect, a fuse includes a fuse housing and a bus bar extending through the housing. The bus bar includes a pocket defined therein. The bus bar is of a first material, wherein a second material is seated within the pocket.

An electrical device assembly and method to attach an isolated single stud fuse assembly to an electrical device are disclosed. The electrical device assembly consists of multiple studs, one or more of which is replaced with the isolated single stud fuse. A conductive copper landing zone receives an electrically isolated steel stud. When the landing pad assembly is orbital riveted into a plastic housing of the electrical device, the stud is locked into the housing permanently. Electrical devices such as disconnect switches and power distribution modules, both of which include multiple studs, are good candidates for being adapted with the single stud fuse assembly.

The invention relates to a surge protection device ensemble comprising a surge protection device having an overvoltage protection means in a first housing, wherein the first housing has at least two connections for contacting the overvoltage protection means, characterized in that the surge protection device ensemble also has a fuse module having a fuse in a second housing, wherein the second housing has at least two connections for contacting the fuse, characterized in that the second housing having one of the connections of the fuse module is inserted in a form-fitting manner into one connection of the at least two connections of the surge protection device, wherein the fuse module provides an electrical connection on the inserted side between the fuse module and the surge protection device.

This disclosure describes techniques implemented at least in part by a fuse-monitoring device to detect when a fuse cutout in an electric power system opens to disconnect a device and/or a load from a power line, and provides an indication of a location of the opened fuse cutout to a utility provider. The fuse-monitoring device may be attached to a fuse holder of the fuse cutout, and may include a movement sensor that detects when the fuse holder swings open due to its fuse melting, or blowing. The fuse-monitoring device may send a notification to the utility provider indicating that the fuse holder has swung open. The fuse-monitoring device may include a GPS sensor to determine the location of the fuse cutout, and may also notify the utility provider of the location of the fuse cutout so a line crew can quickly locate the fuse cutout that requires maintenance.