Abstract: A device (1) for providing protection for an electrical installation against overvoltages including at least one protection component (2), the device having a first mounting (14) delimiting a first interstitial space (14?) with a dimension fixed by construction that at least partially houses a first conducting element (10) and a second conducting element (11) to make the electrical connection between the first conducting element and the second conducting element, the device also having a second mounting (15) delimiting a second interstitial space (15?) with a dimension fixed by construction that at least partially houses a third conducting element (12) and a fourth conducting element (13) so as to make the electrical connection between the third conducting element and the fourth conducting element.

Abstract: A protection device for protecting an electrical installation, which protection device is designed to be connected in parallel with the electrical installation and includes at least two electrically conductive contact members (3, 4) that are suitable for going from a closed position to an open position when a current (I) of magnitude greater than a predetermined threshold value passes through the protection device (1), said protection device being characterized in that, in the closed position, the contact members are separated from each other by a potentially insulating piece (15), thereby forming a spark gap (E) for protecting from voltage surges between the contact members (3, 4). The invention also relates to apparatus for protecting electrical installations.

Abstract: A device (1) to protect electrical equipment against transient overvoltages, comprising (i) a spark gap having an intrinsic follow current interrupting capacity and (ii) an element (5) for improving the follow current interrupting power, which co-operates with the spark gap (2) such that the resulting follow current interrupting capacity of the protective device (1) is essentially greater than the aforementioned intrinsic capacity. When the equipment has a suspected short-circuit current that exceeds the intrinsic interrupting capacity of the spark gap (2), element (5) comprises a means (6) for limiting the intensity of the electric current that can pass through the spark gap (2), said limiting means (6) being specifically designed and mounted in relation to the spark gap (2) in order to limit the intensity of the follow current, such that the follow current can be interrupted thanks to the intrinsic follow current interrupting capacity of the spark gap (2).

Abstract: A device (1) for providing protection for an electrical installation against overvoltages including at least one protection component (2), the device having a first mounting (14) delimiting a first interstitial space (14?) with a dimension fixed by construction that at least partially houses a first conducting element (10) and a second conducting element (11) to make the electrical connection between the first conducting element and the second conducting element, the device also having a second mounting (15) delimiting a second interstitial space (15?) with a dimension fixed by construction that at least partially houses a third conducting element (12) and a fourth conducting element (13) so as to make the electrical connection between the third conducting element and the fourth conducting element.