The invention relates to a disconnection and switch-over device for overvoltage protection, particularly for DC systems, comprising at least one arresting element, and a thermal cut-off point incorporated into the electrical interconnect path of the arresting element, the thermal cut-off point comprising a movable mechanically prestressed conductor element that moves from a first position to a second position in the event of a cut-off, and when the second position is reached, an electrical switch-over to a safety device is generated, and the thermal cut-off point is formed by the movable conductor element and a stationary contact element, the movable conductor element being attached to the stationary contact element by a thermally releasable means. According to the invention, a completely electrical cut-off of the arresting element regarding the interconnect path only occurs when the movable conductor element has gone beyond the second position and has reached a third position, the safety device being arranged in series with the arresting element and the movable conductor element being designed as a wiper or sliding contact in relation to the second position, the second position being created by a bypass end point.

An electrical protection component having a short-circuit device is disclosed. In an embodiment an electrical protection component includes a short-circuiting device including a surge arrester including electrodes and a thermal short-circuiting device including a clip, a first section of which is snapped onto the surge arrester and a second section of which comprises a short-circuiting link, wherein the short-circuiting link of the clip is spaced apart from at least one of the electrodes by a fusible element, wherein the short-circuiting link electrically conductively connects two of the electrodes to one another when the fusible element melts, and wherein the fusible element has a melting point of at least 300 degrees Celsius.

A battery control apparatus for a battery according to the present invention excludes a faulty battery cell from the connection between battery cells and at the same time automatically connects a replacement battery cell to the battery cells when a fault occurs in some of the battery cells, thereby allowing the output voltage of the battery to be kept constant in spite of the faulty battery cell. Further, in a state where a plurality of battery modules are connected in parallel, the battery control apparatus disconnects a battery module including a faulty battery cell during the replacement of the faulty battery cell, thereby preventing the output voltage of the battery from being discontinuous. In addition, a switch used in the battery control apparatus for a battery is a fusible switch including two separate fixed electrodes and one movable electrode.

The invention relates to a disconnecting device for a surge arrester which is accommodated by a support body, and wherein plug contacts which are connected to at least one arrester element of the surge arrester extend from the support body. The invention further comprises a switching tongue which is connected at a first end to the arrester element via a thermal separating point and with a second end to one of the plug contacts. Furthermore, a spring-preloaded insulating disconnecting bracket which is pivotably mounted on the support body is provided, the spring preload acting on the thermal separating point via the switching tongue. According to the invention, the switching tongue is configured as a straight-surface, elongated, metallic, resiliently elastic disconnecting strip having a rectangular cross-section.

An electronic module for a power tool having an electric motor is provided including a printed circuit board (PCB), an inverter bridge circuit, a first conductive track disposed on the PCB and coupled to the power source, a second conductive track disposed on the PCB and coupled to the inverter bridge circuit, and a fuse strap provided between the first conductive track and the second conductive track. The fuse strap includes a main body spaced apart from the PCB, a first mounting portion mounted on the first conductive track via a first solder joint, and a second mounting portion mounted on the second conductive track via a second solder joint.

The temperature sensitive pellet type thermal fuse includes a cylindrical case which has a first end and a second end, a temperature sensitive pellet, an insulating tube, a first lead which is inserted into the insulating tube and has an inner end serving as a contact portion, a movable contact which is electrically connected to the cylindrical case, a weak compression spring, a strong compression spring, and a second lead which is disposed on the second end of the cylindrical case. The movable contact includes a projecting contact portion which is provided at a central part of the movable contact, and the projecting contact portion and the contact portion of the first lead are in contact with each other inside the insulating tube.

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 temperature sensitive pellet type thermal fuse includes a cylindrical case which has a first end and a second end, a temperature sensitive pellet, an insulating tube, a first lead which is inserted into the insulating tube and has an inner end serving as a contact portion, a movable contact which is electrically connected to the cylindrical case, a weak compression spring, a strong compression spring, and a second lead which is disposed on the second end of the cylindrical case. The movable contact includes a projecting contact portion which is provided at a central part of the movable contact, and the projecting contact portion and the contact portion of the first lead are in contact with each other inside the insulating tube.

In an embodiment a thermal varistor protection device includes a casing, a varistor embedded in the casing, wherein the varistor includes a first metallization electrode, which is only partly covered by an insulating material of the casing to allow an electrically conductive connection, a first terminal wire electrically conductively connected to the first metallization electrode of the varistor and a contact element electrically conductively connected to the first metallization electrode of the varistor in a region where the varistor is not covered by the insulating material, wherein the contact element is pre-stressed to ensure a fast separation of the contact element and the first metallization electrode when the electrically conductive connection between the contact element and the first metallization electrode becomes loose.

A system for interrupting ignition is disclosed. Specific implementations of ignition interrupters may include a first conductive tab configured to couple to a spark plug; a second conductive tab configured to couple to a spark plug wire; a first tab holder coupled with the first conductive tab; a second tab holder coupled with the second conductive tab, where the second conductive tab overlaps with the first conductive tab; a sled positioned perpendicularly to a plane of the first conductive tab and the second conductive tab, the sled coupled between the first conductive tab and the second conductive tab; a first spring coupled to the sled; and a second spring coupled to the sled; where the sled may be configured to move to an open position in the gap between the first conductive tab and the second conductive tab, decompressing the first spring and the second spring.