A release mechanism for surge protectors includes a first electrical connection pin (6) soldered with a varistor's second electrode (5B), a function rotating member (3) sheathed on a fixed column (2B and installed between a varistor (5) and a bridge bracket (8), an elastic driving device (4) fixed into an internal box body (2), and a bridge bracket (8) fixed to a second electrical connection pin (7) in the internal box body (2). If the varistor (5) is not released, then the bridge bracket (8) will be passed through a soldering window (3C) and soldered with a varistor's first electrode (5A), or else the elastic driving device (4) will drive the function rotating member (3) to rotate around the fixed column (2B). An arc shield plate (3F) exposed from a failure status indicating area (2N) for triggering a remote linkage rod (9) shields the bridge bracket (8) and electrode (5A).

A release mechanism for surge protectors includes a first electrical connection pin (6) soldered with a varistor's second electrode (5B), a function rotating member (3) sheathed on a fixed column (2B and installed between a varistor (5) and a bridge bracket (8), an elastic driving device (4) fixed into an internal box body (2), and a bridge bracket (8) fixed to a second electrical connection pin (7) in the internal box body (2). If the varistor (5) is not released, then the bridge bracket (8) will be passed through a soldering window (3C) and soldered with a varistor's first electrode (5A), or else the elastic driving device (4) will drive the function rotating member (3) to rotate around the fixed column (2B). An arc shield plate (3F) exposed from a failure status indicating area (2N) for triggering a remote linkage rod (9) shields the bridge bracket (8) and electrode (5A).

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.

A method for operating a protective apparatus and a protective apparatus, in particular a self-tripping explosive fuse, wherein the protective apparatus includes a fuse element, which is designed to interrupt a conductor section by an explosion. A tripping unit is designed to trip the explosion by an ignition voltage (U.sub.Z) when the ignition voltage exceeds a prescribed value. The protective apparatus has a thermoelectric element, which generates the ignition voltage (U.sub.Z) depending on heating of the conductor section.

A method, apparatus, and system for protection from hazards of conductivity is disclosed using non-electrical means to disrupt electrical current with a thermovolumetric substance. The purpose of this invention is to prevent hazardous conditions from occurring by disrupting the flow of electrical current prior to the development of arc fault conditions.

A method, apparatus, and system for protection from hazards of conductivity is disclosed using non-electrical means to disrupt electrical current with a thermovolumetric substance. The purpose of this invention is to prevent hazardous conditions from occurring by disrupting the flow of electrical current prior to the development of arc fault conditions.

An overcurrent protection device for a circuit to be monitored, having at least one trigger unit, which is configured for an interruption of the circuit in at least one trigger situation and which includes at least one conductor section which is configured for a conduction of a current to be monitored, at least one conductive trigger element, which includes at least one thermo magnetically-shiftable material configured for a magnetic property change in dependence on the temperature induced by a current that flows through the conductor section, a conductive magnetic module, a conductive magnetic core, the conductive magnetic module being movable between a first position faced against the conductive trigger element permitting the conduction of the current through the conductor section and a second position faced against said conductive magnetic core breaking the conduction of the current through the conductor section.

An electrical protection device, including a movable contact, connected to an electrical circuit, a switching handle, and an electronic control unit. The device further includes an electrical link element, connecting the movable contact and the electronic control unit, a switch, a mechanical link element, connected to the switching handle. The electronic control unit is configured to measure the first voltage and the second voltage, compare the first voltage and the second voltage to determine the cause of opening of the electrical circuit among manual opening and fault opening, send a first signal if the cause of opening is manual opening and send a second and/or third signal if the cause of opening is fault opening.

A method, apparatus, and system for protection from hazards of conductivity is disclosed using non-electrical means to disrupt electrical current with a thermovolumetric substance. The purpose of this invention is to prevent hazardous conditions from occurring by disrupting the flow of electrical current prior to the development of arc fault conditions.

A method, apparatus, and system for protection from hazards of conductivity is disclosed using non-electrical means to disrupt electrical current with a thermovolumetric substance. The purpose of this invention is to prevent hazardous conditions from occurring by disrupting the flow of electrical current prior to the development of arc fault conditions.