An arrester for surge protection is disclosed. In an embodiment, an arrester for surge protection includes a first electrode, a second electrode, a discharge chamber for enabling an electrical discharge between the electrodes in an event of an overvoltage and an insulator forming an inner wall of the arrester, wherein the inner wall has a projection.

An arrester for surge protection is disclosed. In an embodiment, an arrester for surge protection includes a first electrode, a second electrode, a discharge chamber for enabling an electrical discharge between the electrodes in an event of an overvoltage and an insulator forming an inner wall of the arrester, wherein the inner wall has a projection.

In an embodiment a thermal protection device includes a housing, a varistor partly embedded in the housing, wherein the housing electrically insulates the varistor, and wherein the varistor includes a partly uninsulated contact surface, an inner wall of insulating material arranged adjacent to the contact surface of the varistor, a window in the inner wall configured to allow an electrical connection of the contact surface of the varistor in an operational state of the thermal protection device and a moveable insulation block configured to cover the window in the inner wall to insulate the varistor in a region of the window of the inner wall in a fault state of the thermal protection device.

A surge protective device includes an overvoltage protection circuit and a control module coupled to the overvoltage protection circuit that is configured to monitor at least one performance characteristic of the overvoltage protection circuit and is further configured to communicate the at least one performance characteristic to a destination external to the surge protective device.

Provided in the present disclosure is an arc compression-based arc-extinguishing lightning-protection gap device. The device comprises a lightning protector main body and an arc-striking electrode. The arc-striking electrode is fixedly mounted at one end of the main body. The other end of the main body is fixedly mounted, by means of a link fitting, to a crossarm or one end of an insulator string. The lightning protector main body is provided with an arc-extinguishing path consisting of several arc-extinguishing channels in a repeated Z-shaped arrangement. An arc-extinguishing tube at an inlet of a first arc-extinguishing channel of the arc-extinguishing path is connected to the arc-striking electrode via an arc-guiding rod, and an arc-extinguishing tube at an outlet of a last arc-extinguishing channel is connected to the link fitting. A three-way tube is provided at a joint of two adjacent arc-extinguishing channels; two ends of the three-way tube are each provided with one arc-guiding electrode; and the arc-guiding electrode has one end extending into the three-way tube and the other end connected to a nearby arc-extinguishing tube via direct contact or a wire. The present disclosure has the advantages of simple structure, reasonable design, improved arc-extinguishing performance, and stable operation.

An overvoltage protection with indication of exceeded operating temperature, where the overvoltage protection includes at least one protection element from the group of a two-pole protection component, a two-pole protection component complemented with a temperature dependent fuse, and/or a three-pole protection component. All protection components used in the given overvoltage protection is linked via a thermal link to the status indicator including a thermosensitive layer with irreversible change of color in case a temperature of the destructed protection members of the overvoltage protection is exceeded

Provided in the present disclosure is an arc compression-based arc-extinguishing lightning-protection gap device. The device comprises a lightning protector main body and an arc-striking electrode. The arc-striking electrode is fixedly mounted at one end of the main body. The other end of the main body is fixedly mounted, by means of a link fitting, to a crossarm or one end of an insulator string. The lightning protector main body is provided with an arc-extinguishing path consisting of several arc-extinguishing channels in a repeated Z-shaped arrangement. An arc-extinguishing tube at an inlet of a first arc-extinguishing channel of the arc-extinguishing path is connected to the arc-striking electrode via an arc-guiding rod, and an arc-extinguishing tube at an outlet of a last arc-extinguishing channel is connected to the link fitting. A three-way tube is provided at a joint of two adjacent arc-extinguishing channels; two ends of the three-way tube are each provided with one arc-guiding electrode; and the arc-guiding electrode has one end extending into the three-way tube and the other end connected to a nearby arc-extinguishing tube via direct contact or a wire. The present disclosure has the advantages of simple structure, reasonable design, improved arc-extinguishing performance, and stable operation.

An arrester for surge protection is disclosed. In an embodiment, an arrester for surge protection includes a first electrode, a second electrode, a discharge chamber for enabling an electrical discharge between the electrodes in an event of an overvoltage and an insulator forming an inner wall of the arrester, wherein the inner wall has a projection.

An arrester for surge protection is disclosed. In an embodiment, an arrester for surge protection includes a first electrode, a second electrode, a discharge chamber for enabling an electrical discharge between the electrodes in an event of an overvoltage and an insulator forming an inner wall of the arrester, wherein the inner wall has a projection.

A fuse has a first contact and a second contact, with the second contact being used to electrically contact the device to be protected. The fuse has a fuse element that connects the first contact to the second contact. The fuse also has an additional contact being arranged so as to be insulated from the first contact and insulated from the second contact and, in an untripped state, is contactless with respect to the fuse element, with the first contact being directly connected to the first potential during operation and with the device to be protected being directly connected to the second potential during operation, with the additional contact also being directly connected to the second potential during operation. A fourth contact makes external triggering available, with triggering resulting in an electric arc that causes the fuse element to fuse.