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.

The invention relates to a surge protection device intended to be installed on an electrical installation, in parallel with one or more items of equipment to be protected, said electrical installation comprising at least one first phase line (L1), a neutral line (N) and an earth line (T), the protection device comprising a casing; and a current measurement toroid, which is housed in the casing and which comprises a central opening, through which a detection portion passes that is disposed in a surge current diversion path.

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 protection device has at least one disconnecting device (34), at least one actuating device (36), an indicating device (40), and a shaft (38) mounted for rotation between at least a first position and a second position, the at least one actuating device (36) being variable between a first position and a second position. The shaft (38), the indicating device (40) and the actuating device (36) are formed in such a way and the actuating device (36), when in the first position, is fastened to the at least one disconnecting device (34) so as to be preloaded such that when the disconnecting device (34) is triggered, the actuating device (36) is released and triggers the indicating device (40) by means of the shaft (38). Further, a modular surge protection system is described.

The object of the invention is a fuse for a device to be protected that is connected in series with the fuse, wherein the series connection is connected to a supply network with a first potential and with a second potential that is different from the first, wherein the fuse has a first contact and a second contact, with the second contact being used to electrically contact the device (8) to be protected, wherein the fuse has a fuse element that connects the first contact to the second contact, wherein the fuse also has an additional contact, with the 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 (N) during operation, with the additional contact also being directly connected to the second potential during operation, and wherein a fourth contact is also provided that makes external triggering available, with triggering resulting in an electric arc that indirectly or directly causes the fuse element to fuse.

A surge protection device (14) comprises at least one disconnecting device (38) provided in a housing (50), a heat-conducting element (40), an actuating element (42) for actuating an indicating device (44), and a locking element (58), the heat-conducting element (40) being in contact with the housing (50). The actuating element (42) is fastened to the heat-conducting element (40) by means of the locking element (58), and the fastening is configured such that when a predetermined temperature at the locking element (58) is exceeded, the locking element (58) is detached from the heat-conducting element (40) and/or from the actuating element (42) and releases the actuating element (42)

A modular surge protection system (10) is furthermore shown.

A surge protection device (14) comprises at least one disconnecting device (38) provided in a housing (50), a heat-conducting element (40), an actuating element (42) for actuating an indicating device (44), and a locking element (58), the heat-conducting element (40) being in contact with the housing (50). The actuating element (42) is fastened to the heat-conducting element (40) by means of the locking element (58), and the fastening is configured such that when a predetermined temperature at the locking element (58) is exceeded, the locking element (58) is detached from the heat-conducting element (40) and/or from the actuating element (42) and releases the actuating element (42)

A modular surge protection system (10) is furthermore shown.

A surge protection device comprises at least one disconnecting device provided in a housing, a heat-conducting element, an actuating element for actuating an indicating device, and a locking element, the heat-conducting element being in contact with the housing. The actuating element is fastened to the heat-conducting element by means of the locking element, and the fastening is configured such that when a predetermined temperature at the locking element is exceeded, the locking element is detached from the heat-conducting element and/or from the actuating element and releases the actuating element.

A surge protection device comprises at least one disconnecting device provided in a housing, a heat-conducting element, an actuating element for actuating an indicating device, and a locking element, the heat-conducting element being in contact with the housing. The actuating element is fastened to the heat-conducting element by means of the locking element, and the fastening is configured such that when a predetermined temperature at the locking element is exceeded, the locking element is detached from the heat-conducting element and/or from the actuating element and releases the actuating element.

A surge protection device has at least one disconnecting device (34), at least one actuating device (36), an indicating device (40), and a shaft (38) mounted for rotation between at least a first position and a second position, the at least one actuating device (36) being variable between a first position and a second position. The shaft (38), the indicating device (40) and the actuating device (36) are formed in such a way and the actuating device (36), when in the first position, is fastened to the at least one disconnecting device (34) so as to be preloaded such that when the disconnecting device (34) is triggered, the actuating device (36) is released and triggers the indicating device (40) by means of the shaft (38). Further, a modular surge protection system is described.