An electrical fuse that includes an electro-pyrotechnic igniter, a separating element, which can be moved by the electro-pyrotechnic igniter, and a busbar with a separating section. A separating element is arranged so that it can move after the electro-pyrotechnic igniter is triggered to separate the busbar. At least one inductive coupler is arranged on the busbar or a high-voltage line. The electrical fuse further includes a control circuit for controlling an ignition current for triggering the electro-pyrotechnic igniter. The control circuit includes at least one semiconductor switch for switching the ignition current provided, at least one capacitor, connected to a control input of the semiconductor switch, and a diode coupled on one side to the at least one inductive coupler and on the other side to the capacitor and a control input of the semiconductor switch.

A pyrotechnic circuit breaker comprising a housing, at least two connection terminals, an internal electric circuit connecting the two connection terminals and formed for example by an electrical conductor, an opening member, movable and arranged to open a part to be opened of the internal electric circuit when moving between an initial position and a final position, so as to form at least two discrete portions of conductor after opening,a pyrotechnic actuator arranged to move the opening member from the initial position to the final position, an internal chamber receiving the part to be opened, wherein the internal chamber comprises or contains at least one wall formed with a plastic material comprising silicone.

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 pyrotechnical disconnection unit for impairing, preferably interrupting, an electrical charge coupling between a chargeable electrical energy cell, particularly comprising an electrical energy storage and an energy converter, and an electrical energy supply, such as a charging device, provides an electrically conductive connection section, such as an electrically conductive cable, an electrically conductive path or such, via which electrical charging energy is supplied from the energy supply of the electrical energy cell, a housing, in which the connection section is arranged, and a pyrotechnical means accommodated inside the housing being designed and/or being controllable in such a way that it unfolds its pyrotechnical effect when reaching a predefined operational state, wherein the pyrotechnical means is attributed to the connection section in such a way that the pyrotechnical effect of the pyrotechnical means at least limits, preferably suspends, the electrical conductivity of the connection section inside the housing.

Systems for disconnecting a surge arrester. One embodiment provides a surge arrester comprising a housing, a connecting interface configured to connect to an electrical power grid, and a disconnector device coupled to the connecting interface. A metal oxide varistor stack is coupled to the disconnector device, and a ground side connection is coupled to the metal oxide varistor stack, the ground side connection configured to connect to a system ground. The disconnector device is configured to disconnect the connecting interface from the system ground based on a predetermined disconnection condition.

A direct current interrupting switch assembly comprising a primary conductor and a secondary conductor integrated with a direct voltage source and a load. The primary conductor of the switch assembly has two branches, the first branch including a fuse with a melting member and the second branch including a pyroswitch with an interrupting member. In a first position, the second branch of the primary conductor is uninterrupted, and the interrupting member is a sufficient distance apart from the secondary conductor. When the interrupting member is moved to a second position, the current in second branch of the primary conductor is interrupted and the interrupting member contacts the secondary conductor of the switch assembly.

The invention relates to a lightning protection spark gap assembly. The lightning protection spark gap assembly comprises: a lightning protection spark gap (1); a safety fuse device (8) which can be triggered by a bridge initiator (7) and which is connected between a first or second voltage line (S1, S2) and a corresponding main connection (1, 1b) of the lighting protection spark gap (1); and an indicator device (4′) for detecting a secondary current flow connecting to a pulse current flow or a corresponding portion of the secondary current flow, and for triggering the safety fuse device (8) by activating the bridge initiator (7) when the detected secondary current flow or the corresponding portion of the secondary current flow fulfills a first predefined criterion, wherein the lightning protection spark gap (1) has a first and a second divergent electrode (21a, 21b) and an arcing chamber (25), and wherein the indicator device (4′) is electrically connected to the first or second divergent electrode (21a, 21b) and/or the arcing chamber (25) in such a way that it detects the secondary current flow or the corresponding portion of the secondary current flow in the area (L) in which the secondary current arc flows.

The invention relates to a pyrotechnic switch, which comprises: a housing (10) formed by a first housing part (11) that is assembled with a second housing part (12); and at least one pyrotechnic actuator (32) arranged in the housing (10);
wherein at least one out of the first housing part (11) or the second housing part (12) comprises a metal reinforcement (16) and a plastic body (C2) overmolded onto the metal reinforcement (16),
characterized in that the plastic body (C2) comprises: a first portion made of a first plastic material, and a second portion made of a second plastic material.

Fuse devices and electrical systems using the fuse devices are disclosed, with the fuse devices having internal components to cause a fuse blown event when the pre-determined current level is reached through the contacts. The internal components can comprise a levitation actuator that causes separation between one or more of the contacts as the current level approaches the predetermined level. This causes contact levitation and arcing, which increases the resistance at the contact being separated. This in turn causes the current through the contacts to seek another path that in the embodiments herein is a path to a pyro feature. The current activates the pyro feature, which causes the contacts to separate and puts the fuse device in “fuse blown” condition where currents can no longer flow through the contacts.

The invention relates to a triggered fuse for low-voltage applications for protecting devices that can be connected to a power supply system, in particular surge protection devices, consisting of at least one fusible conductor which is located between two contacts and is arranged in a housing, and also consisting of a trigger device for controlled disconnection of the fusible conductor in the event of malfunctions or overload states of the respective connected device, wherein an arc quenching medium is introduced into the housing. The at least one fusible conductor has a plurality of conventional electrical bottlenecks, which are designed for the rated load of the respective fuse. At least one further additional geometric bottleneck is provided, which is disconnectable by rupturing depending on the trigger unit when applied by tension.