A switch-off device includes a current conductor for forming a load current path, a pyrotechnically activatable separating unit for interrupting the load current path in the event of a fault, including a separating element for detaching the current conductor and a pyrotechnic element for accelerating the separating element in the direction of the current conductor, and an arc extinguishing unit for extinguishing an arc, including a melting conductor which is not normally incorporated into the load current path and an extinguishing device for extinguishing the melting conductor.

To produce a current disconnector for automotive safety systems having a conductor (1) which has at least one weakened disconnection point (7a, 7b), the conductor (1) is overmoulded in a plastic injection-moulding tool (2, 3). According to the invention, the disconnection point or disconnection points (7a, 7b) of the conductor (1) is/are produced in the plastic injection-moulding tool (2, 3). This not only simplifies production, it also prevents damage to the conductor, which is fragile owing to the weakened disconnection point, before it is stabilised by the overmoulding. Preferably, the disconnection point or disconnection points (7a, 7b) is/are produced by the closing movement of the plastic injection-moulding tool (2, 3). The disconnection point or disconnection points (7a. 7b) can also be produced in the preheating region of the plastic injection-moulding tool.

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 housing for safe outgassing of a fuse is disclosed. The fuse housing features labyrinth walls disposed at opposing sides of the fuse housing. The labyrinth walls feature serpentine paths for the flow of outgassing material. At an end of the serpentine paths which is farthest away from a fuse element are vent channels. The vent channels are narrower in depth than that of the serpentine paths of the labyrinth walls, facilitating a suctioning effect during outgassing. Conductive material deposits along the serpentine paths so that the fuse maintains a high OSR rating. By directing and controlling the outflow of gases, the fuse housing is able to reduce the temperature of the gases produced. The fuse housing is also able to reduce the physical and observable effects of outgassing.

Electrical switching device are disclosed having a housing with internal component within the housing. The internal components comprise contacts configured to operate, to change the state of the switching device from a closed state, allowing current flow through the switching device to an open state which interrupts current flow through the switching device. A pyrotechnic feature is included that is configured to interact with the internal components to transition the switching device from the closed state to the open state when the pyrotechnic feature is activated. The pyrotechnic feature is configured to trigger in response to levitation between the contacts at elevated current signal flowing through the switching device.

An electrical circuit breaker assembly, and a method for its operation, including a conductive element of an electrical circuit and a cut-off device configured to be activated by a pyrotechnic element and that is configured to sever the conductive element in a cut-off zone delimited by a downstream point. The electrical circuit breaker assembly further includes a contactor element configured to be activated by a pyrotechnic element, the contactor element being configured to connect the downstream point of the cut-off zone to an earth conductor of the electrical circuit prior to a severing of the conductive element or simultaneously with the severing of the conductive element.

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.

An electric circuit breaker device includes: an igniter; a projectile that is disposed in a movement path, the projectile formed to be movable by actuation of the igniter; and a conductor piece that forms one portion of a predetermined electric circuit, the conductor piece having both end portions connected to respective other portions of the predetermined electric circuit, the conductor piece having a first portion between both the end portions arranged to traverse the movement path. A sensor is connected to a first part positioned between both the end portions and to a second part that is between both the end portions and is different from the first part, the sensor configured to detect current flowing through the conductor piece between both the end portions, the sensor disposed to be integrated with the conductor piece. The actuation of the igniter is controlled, based on the current detected by the sensor.

The present disclosure refers to a switch for interrupting of a circuit in which two voltage sources and at least one load are connected, wherein the switch actuate quickly in an emergency. The switch includes a main conductor connecting both electric voltage sources and said load, bridged by a supplemental conductor which is in parallel with the two voltage sources and the load, and prior to activation of the switch, interrupted and electrically open. A branch with an integrated fuse is in parallel with the main conductor and linked at two connecting points between the two electric voltage sources while the connecting points includes a movable section which under pre-determined conditions moves from contact with the main conductor into an alternate position in contact with the supplemental conductor, resulting in an open circuit across the main conductor and a closed circuit across the supplemental conductor.