A gas-filled spark gap 2 for the protection of an electrical installation includes a gastight casing 4 and two elongate electrodes 13, 14 delimiting between them an inter-electrode space. The inter-electrode space includes successively a striking chamber 17 and an arc-extinguishing chamber 20 for extinguishing the electrical arc. The arc-extinguishing chamber 20 includes mutually spaced divider plates 29. The gas-filled spark gap 2 also includes two connecting terminals 11, 12 accessible from outside the casing 4 and intended to enable electrical connection of the gas-filled spark gap 2 to the electrical installation. The two connecting terminals 11, 12 are respectively electrically connected to the two electrodes 13, 14. Finally, the gas-filled spark gap 2 includes an inert gas trapped in the casing 4.

A gas-filled spark gap 2 for the protection of an electrical installation includes a gastight casing 4 and two elongate electrodes 13, 14 delimiting between them an inter-electrode space. The inter-electrode space includes successively a striking chamber 17 and an arc-extinguishing chamber 20 for extinguishing the electrical arc. The arc-extinguishing chamber 20 includes mutually spaced divider plates 29. The gas-filled spark gap 2 also includes two connecting terminals 11, 12 accessible from outside the casing 4 and intended to enable electrical connection of the gas-filled spark gap 2 to the electrical installation. The two connecting terminals 11, 12 are respectively electrically connected to the two electrodes 13, 14. Finally, the gas-filled spark gap 2 includes an inert gas trapped in the casing 4.

A gas-filled spark gap for the protection of an electrical installation includes a gastight casing and two elongate electrodes delimiting between them an inter-electrode space. The inter-electrode space includes successively a striking chamber and an arc-extinguishing chamber for extinguishing the electrical arc. The arc-extinguishing chamber includes mutually spaced divider plates. The gas-filled spark gap also includes two connecting terminals accessible from outside the casing and intended to enable electrical connection of the gas-filled spark gap to the electrical installation. The two connecting terminals are respectively electrically connected to the two elongate electrodes. Finally, the gas-filled spark gap includes an inert gas trapped in the casing.

A gas-filled spark gap for the protection of an electrical installation includes a gastight casing and two elongate electrodes delimiting between them an inter-electrode space. The inter-electrode space includes successively a striking chamber and an arc-extinguishing chamber for extinguishing the electrical arc. The arc-extinguishing chamber includes mutually spaced divider plates. The gas-filled spark gap also includes two connecting terminals accessible from outside the casing and intended to enable electrical connection of the gas-filled spark gap to the electrical installation. The two connecting terminals are respectively electrically connected to the two elongate electrodes. Finally, the gas-filled spark gap includes an inert gas trapped in the casing.