Mersen France Sb Sas

Arianegroup Sas

Rémy Ouaida

Jean-François De Palma

Frédéric Marlin

Romain Lorenzon

Gilles Gonthier

Alexandre Mathieu

Gianfranco De Palma

A pyrotechnic cut-off device to be connected to an electrical circuit to cut-off, includes a pyrotechnic initiator, a first and a second conductive portion each intended to be connected to the electrical circuit, the second portion being connected in parallel with the first portion and including two conductive elements separated by an insulating segment, at least one of the conductive elements provided with a first fuse element connected in series which is configured to trip when the intensity of the current passing therethrough exceeds a first predetermined value, and a first and a second insulating protrusion, each protruding from a lower face of a movable piston and the first and the second protrusions being located respectively in front of the first portion and the insulating segment. The pyrotechnic initiator is configured to switch the cut-off device from a first current passage configuration to a second current cut-off configuration.

Pyrotechnic switching device

A breaker device for connecting in an electrical circuit, the device includes a pyrotechnic initiator and a body having present therein: a pressurizing chamber in communication with an outlet from the pyrotechnic initiator; at least one electrically conductive portion for connection to the electrical circuit; at least one fusible element connected in series with the conductive portion, the initiator being connected to the terminals of the fusible element and the fusible element being configured to trip when the current passing through it exceeds a predetermined value, thereby actuating the initiator; and a movable breaker element; the pyrotechnic initiator being configured to cause the breaker device to pass from a current-passing first configuration to a circuit-breaking second configuration, the movable breaker element being moved on passing from the first configuration to the second in order to disconnect the conductive portion.

Breaker device for connection to an electrical circuit

The invention relates to a protective device () for an electrical circuit (), including a first fuse (), a pyroelectric switch () connected in parallel with the first fuse and comprising a control area (), capable of receiving a trigger signal (S), and a power area () for the passage of the electric current. The device also comprises a control circuit configured to produce and transmit the trigger signal to the control area. The device includes a second fuse connected in series between a first input conductor () and the first fuse and capable of supplying a power supply voltage (V) to the control circuit, which is connected between the second fuse and the control area.

Protective device for an electrical circuit, electrical circuit provided with such a device and method for protecting such an electrical circuit

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Villeurbanne, France

Rémy Ouaida