Disclosed is a switch device with at least one contact point and a permanent magnetic arc blowing device which is paired with the contact point, wherein the arc blowing device has at least one second permanent magnet (15) as an auxiliary magnet, and the auxiliary magnet is arranged in the direct vicinity of the contact point (7.1), such that at least one section of the magnetic field (17) of the auxiliary magnet (15) amplifies the blow-out field in the transition region.

The invention relates to a thermally triggered, mechanical switching device, consisting of a heat-sensitive means and a mechanical force-storage means, wherein the heat-sensitive means blocks or unblocks the movement path of a switching piece; furthermore, the switching piece is preloaded and held by the mechanical force-storage means, and comprising a housing that accommodates the aforementioned means. According to the invention, the housing is designed as a cartridge-shaped shell which receives a plunger in the interior thereof, which plunger is mounted in a movable manner through a first end-side opening in the housing and is supported against a fusible shaping part under pretension, wherein the fusible shaping part is arranged so as to cover a second opening, which is located opposite the first end-side opening, in such a way that, when the melting temperature of the fusible shaping part is reached, said fusible shaping part is displaced by the plunger and the plunger takes on a changed position.

The invention relates to a thermally triggered, mechanical switching device, consisting of a heat-sensitive means and a mechanical force-storage means, wherein the heat-sensitive means blocks or unblocks the movement path of a switching piece; furthermore, the switching piece is preloaded and held by the mechanical force-storage means, and comprising a housing that accommodates the aforementioned means. According to the invention, the housing is designed as a cartridge-shaped shell which receives a plunger in the interior thereof, which plunger is mounted in a movable manner through a first end-side opening in the housing and is supported against a fusible shaping part under pretension, wherein the fusible shaping part is arranged so as to cover a second opening, which is located opposite the first end-side opening, in such a way that, when the melting temperature of the fusible shaping part is reached, said fusible shaping part is displaced by the plunger and the plunger takes on a changed position.

A switch module with a built-in structure of anti-surge and linkage disconnection, particularly to one that has an anti-surge instant expanding detaching device with a cocoon form protection structure, when an overvoltage occurs, the metal oxide varistor would instantly heat up or explode, and the expanded graphite is linear expanded by absorbing heat and forms a cocoon form protection structure that fill up the containing space like a spider web covering the metal oxide varistor to forms a flame proof layer, when the expanding volume of the expanded graphite reach the predetermined setting, the expansion provides a push force pushing the pushing element forcing the first connecting point detaching from the second connecting point and turning off the switch, and further achieving the effects of easy manufacturing and improving the stability and the accuracy.

A switch module with a built-in structure of anti-surge and linkage disconnection, particularly to one that has an anti-surge instant expanding detaching device with a cocoon form protection structure, when an overvoltage occurs, the metal oxide varistor would instantly heat up or explode, and the expanded graphite is linear expanded by absorbing heat and forms a cocoon form protection structure that fill up the containing space like a spider web covering the metal oxide varistor to forms a flame proof layer, when the expanding volume of the expanded graphite reach the predetermined setting, the expansion provides a push force pushing the pushing element forcing the first connecting point detaching from the second connecting point and turning off the switch, and further achieving the effects of easy manufacturing and improving the stability and the accuracy.

Thermal fuses and related methods of operation are disclosed. In some embodiments, a thermal fuse may include an insulating component and two electrodes operatively connected to the insulating component. Based on a difference in the thermal coefficients of expansion, the insulating component may expand axially relative to the electrodes with increasing temperature. As the insulating component expands the two electrodes may be moved axially apart to transition between an open and closed configuration. In some embodiments, the thermal fuse may transition between the open and closed configuration depending on whether or not an operating temperature of the thermal fuse is above or below a threshold temperature.

Thermal fuses and related methods of operation are disclosed. In some embodiments, a thermal fuse may include an insulating component and two electrodes operatively connected to the insulating component. Based on a difference in the thermal coefficients of expansion, the insulating component may expand axially relative to the electrodes with increasing temperature. As the insulating component expands the two electrodes may be moved axially apart to transition between an open and closed configuration. In some embodiments, the thermal fuse may transition between the open and closed configuration depending on whether or not an operating temperature of the thermal fuse is above or below a threshold temperature.

An electrical protection unit A including a main conductor and, for each main conductor, a current limiter device connected in series with the main conductor to limit the current when a current or temperature threshold is exceeded, the limiter device including an element made of a material having a positive temperature coefficient, called PTC, and being capable of controlling a device for tripping the mechanism M for opening the contacts of the protection unit D, to cause the opening of the contacts of the unit when the threshold is exceeded leading to a change of state of the element between a low resistance state and a high resistance state. The PTC element includes the trip device, in such a way that this element itself provides the functions of fault current limitation and of tripping the mechanism for opening the contacts.

An electrical protection unit A including a main conductor and, for each main conductor, a current limiter device connected in series with the main conductor to limit the current when a current or temperature threshold is exceeded, the limiter device including an element made of a material having a positive temperature coefficient, called PTC, and being capable of controlling a device for tripping the mechanism M for opening the contacts of the protection unit D, to cause the opening of the contacts of the unit when the threshold is exceeded leading to a change of state of the element between a low resistance state and a high resistance state. The PTC element includes the trip device, in such a way that this element itself provides the functions of fault current limitation and of tripping the mechanism for opening the contacts.

The invention relates to a thermally triggered, mechanical switching device, consisting of a heat-sensitive means and a mechanical force-storage means, wherein the heat-sensitive means blocks or unblocks the movement path of a switching piece; furthermore, the switching piece is preloaded and held by the mechanical force-storage means, and comprising a housing that accommodates the aforementioned means. According to the invention, the housing is designed as a cartridge-shaped shell which receives a plunger in the interior thereof, which plunger is mounted in a movable manner through a first end-side opening in the housing and is supported against a fusible shaping part under pretension, wherein the fusible shaping part is arranged so as to cover a second opening, which is located opposite the first end-side opening, in such a way that, when the melting temperature of the fusible shaping part is reached, said fusible shaping part is displaced by the plunger and the plunger takes on a changed position.