A high-speed closing device includes a first fixed contactor which is made from a conductive material; a second fixed contactor which is made from a conductive material, and faces the first fixed contactor so as to be arranged; and a movable contactor, of which a tip is made from a conductive material, which includes a hollow hole, in which an opposite side of the tip is opened, at an inner portion, and is separated from the first fixed contactor and the second fixed contactor with a distance being longer than an insulation distance so as to be arranged before the high-speed closing device is closed, and inserts the tip between the first fixed contactor and the second fixed contactor after the high-speed closing device is closed, and electrically connects the first fixed contactor and the second fixed contactor.

The invention relates to a voltage limiting device which has an electromagnetically operable switching device for producing an electrical connection between a first cable terminal and a second cable terminal wherein a first electrical conductor connects the first cable terminal to the one terminal of the switching device and a second electrical conductor electrically connects the second cable terminal to the other terminal of the switching device. The voltage limiting device is characterized in that one of the two electrical conductors comprises an electrically conductive support plate. The expansion of the support plate in the width direction allows, in contrast to an electrical conductor which is characterized by a small width in relation to the length, a current displacement in the width direction. As a result, the forces acting on the conductive parts of the switching device are reduced and the switching contacts are relieved, as a result of which the electrical properties of the voltage limiting device are improved. As an electrical conductor, the support plate improves not only the electrical properties of the voltage limiting device, but as a mounting plate also simplifies the assembly and mounting of the individual components of the voltage limiting device.

The invention relates to a voltage limiting device which has an electromagnetically operable switching device for producing an electrical connection between a first cable terminal and a second cable terminal wherein a first electrical conductor connects the first cable terminal to the one terminal of the switching device and a second electrical conductor electrically connects the second cable terminal to the other terminal of the switching device. The voltage limiting device is characterized in that one of the two electrical conductors comprises an electrically conductive support plate. The expansion of the support plate in the width direction allows, in contrast to an electrical conductor which is characterized by a small width in relation to the length, a current displacement in the width direction. As a result, the forces acting on the conductive parts of the switching device are reduced and the switching contacts are relieved, as a result of which the electrical properties of the voltage limiting device are improved. As an electrical conductor, the support plate improves not only the electrical properties of the voltage limiting device, but as a mounting plate also simplifies the assembly and mounting of the individual components of the voltage limiting device.

A temperature actuated switch (1) includes: first and second temperature sensing sections (10, 20) that each include a contact (12, 22) and a thermally deformable member (first bimetal 11, second bimetal 21) that is bent in accordance with a temperature rise from a normal temperature in a manner such that the contacts (12, 22) shift from an open state to a connected state, the contacts (12, 22) being provided on a free-end side and located on the individual surfaces of the first and second temperature sensing sections that face each other; first, second, and third terminals (31, 32, 33) connected to an external circuit; and an insulation section (40) that maintains the first, second, and third terminals (31, 32, 33) in an insulated state, wherein the first temperature sensing section (10) includes first and second regions (A1, A2) with a slit (13) that extends from a fixed-end side to the free-end side provided therebetween, the first terminal (31) is connected to the first region (A1), the second terminal (32) is connected to the second region (A2), and the third terminal (33) is connected to the second temperature sensing section (20).

A temperature actuated switch (1) includes: first and second temperature sensing sections (10, 20) that each include a contact (12, 22) and a thermally deformable member (first bimetal 11, second bimetal 21) that is bent in accordance with a temperature rise from a normal temperature in a manner such that the contacts (12, 22) shift from an open state to a connected state, the contacts (12, 22) being provided on a free-end side and located on the individual surfaces of the first and second temperature sensing sections that face each other; first, second, and third terminals (31, 32, 33) connected to an external circuit; and an insulation section (40) that maintains the first, second, and third terminals (31, 32, 33) in an insulated state, wherein the first temperature sensing section (10) includes first and second regions (A1, A2) with a slit (13) that extends from a fixed-end side to the free-end side provided therebetween, the first terminal (31) is connected to the first region (A1), the second terminal (32) is connected to the second region (A2), and the third terminal (33) is connected to the second temperature sensing section (20).

The invention relates to a short-circuiting device for use in low-voltage and medium-voltage systems for protecting parts and personnel, comprising a switching element which can be operated by the tripping signal of a fault detection device, two mutually opposite contact electrodes having power supply means, wherein contact can be made with said contact electrodes at an electrical circuit having connections at different potentials, furthermore, in at least one of the contact electrodes, a moving contact part which is under mechanical prestress and executes a movement to the further contact electrode in a manner assisted by spring force in the event of a short circuit, a sacrificial element as spacer between the contact electrodes and also having an electrical connection between the sacrificial element and the switching element on the one hand and one of the contact electrodes on the other hand, in order to cause current flow-induced thermal deformation or destruction of the sacrificial element in a targeted manner. According to the invention, the moving contact part is in the form of a hollow cylinder which is closed on one side and a spring for generating prestress is used in the hollow cylinder. The hollow cylinder is guided in a movable manner in a complementary cutout in the first contact electrode so as to form a sliding contact. In the region of the base of the closed hollow cylinder, the cylinder wall of said hollow cylinder is configured to turn into a cone on its outer circumferential side. Furthermore, starting from the base, a first pin-like extension which is situated opposite a second pin-like projection which is insulated from the contact electrodes is arranged in the interior of the hollow cylinder, wherein the sacrificial element, in the form of a bolt or screw, is arranged between the first and the second pin-like projection. A cutout which is matched to the external cone of the moving contact and has an internal cone is provided in the second contact electrode, wherein the external cone and internal cone form a bounce-free short-circuit contact region with a force-fitting and interlocking connection on account of the plastic deformation which occurs.

The invention relates to a short-circuiting device for use in low-voltage and medium-voltage systems for protecting parts and personnel, comprising a switching element which can be operated by the tripping signal of a fault detection device, two mutually opposite contact electrodes having power supply means, wherein contact can be made with said contact electrodes at an electrical circuit having connections at different potentials, furthermore, in at least one of the contact electrodes, a moving contact part which is under mechanical prestress and executes a movement to the further contact electrode in a manner assisted by spring force in the event of a short circuit, a sacrificial element as spacer between the contact electrodes and also having an electrical connection between the sacrificial element and the switching element on the one hand and one of the contact electrodes on the other hand, in order to cause current flow-induced thermal deformation or destruction of the sacrificial element in a targeted manner. According to the invention, the moving contact part is in the form of a hollow cylinder which is closed on one side and a spring for generating prestress is used in the hollow cylinder. The hollow cylinder is guided in a movable manner in a complementary cutout in the first contact electrode so as to form a sliding contact. In the region of the base of the closed hollow cylinder, the cylinder wall of said hollow cylinder is configured to turn into a cone on its outer circumferential side. Furthermore, starting from the base, a first pin-like extension which is situated opposite a second pin-like projection which is insulated from the contact electrodes is arranged in the interior of the hollow cylinder, wherein the sacrificial element, in the form of a bolt or screw, is arranged between the first and the second pin-like projection. A cutout which is matched to the external cone of the moving contact and has an internal cone is provided in the second contact electrode, wherein the external cone and internal cone form a bounce-free short-circuit contact region with a force-fitting and interlocking connection on account of the plastic deformation which occurs.

The invention relates to a self-supported activation device for an electromechanical switch, which can be used for the isolation of a faulty element of a battery, comprising a set of electrically connected elements. The activation device (1) is intended to activate switching in a switching device (2) of the type having electrical contact means (3) that can move between first and second electrical positions. The activation device comprises a current sensor (6a, 6b), a retaining element (7), and at least two movable elements (8, 9) solidly connected to a coil (10). When a current is detected by the current sensor (6a, 6b) the activation device can move from a non-activation configuration, in which the movable elements are retained by the retaining element in a first position intended to prevent the movement of the contact means of a switching device, into an activation configuration, in which the movable elements are no longer retained in the first position by the retaining element and instead occupy a second position intended to allow the movement of the contact means of a switching device. The coil (10) comprises a passage space for at least part of the contact means, and each of the movable elements can rotate about an axis such as to clear the passage space, in the aforementioned second position, while remaining solidly connected to the coil.

The invention relates to a self-supported activation device for an electromechanical switch, which can be used for the isolation of a faulty element of a battery, comprising a set of electrically connected elements. The activation device (1) is intended to activate switching in a switching device (2) of the type having electrical contact means (3) that can move between first and second electrical positions. The activation device comprises a current sensor (6a, 6b), a retaining element (7), and at least two movable elements (8, 9) solidly connected to a coil (10). When a current is detected by the current sensor (6a, 6b) the activation device can move from a non-activation configuration, in which the movable elements are retained by the retaining element in a first position intended to prevent the movement of the contact means of a switching device, into an activation configuration, in which the movable elements are no longer retained in the first position by the retaining element and instead occupy a second position intended to allow the movement of the contact means of a switching device. The coil (10) comprises a passage space for at least part of the contact means, and each of the movable elements can rotate about an axis such as to clear the passage space, in the aforementioned second position, while remaining solidly connected to the coil.

An electric system has an electrical energy source connected to an electrical energy sink by at least one feeding line. Each feeding line (8) is in at least one position therealong between said source and said sink provided with an arrangement configured to interrupt arcing in the feeding line would such arcing reach this position. The arrangement has a temperature dependent member which upon an increase of the temperature thereof above a predetermined level activates an irreversible movement of movable means (24) which by this movement cuts off the arc (a) and/or removes hot ionized gases (28) and by that prevents the arcing to continue in the feeding line past the arrangement.