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Overvoltage arrester having a gas-filled housing, including two overvoltage arrester electrodes disposed across from each other in the housing, a tubular insulator body spacing the overvoltage arrester electrodes apart from each other, a ring-shaped flange integral with one of the overvoltage arrest

Overvoltage arrester having a gas-filled housing, including two overvoltage arrester electrodes disposed across from each other in the housing, a tubular insulator body spacing the overvoltage arrester electrodes apart from each other, a ring-shaped flange integral with one of the overvoltage arrester electrodes forming a first spark gap electrode, a ring-shaped metal cap forming a second spark gap electrode being superimposed on the first spark gap electrode and pressed in on the tubular insulator body, the first and second spark gap electrodes forming a spark gap having a given clearance therebetween, and a contact spring connecting the second spark gap electrode to the other of the overvoltage arrester electrodes.

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Overvoltage arrester having a gas-filled housing, comprising two overvoltage arrester electrodes disposed across from each other in the housing, a tubular insulator body spacing said overvoltage arrester electrodes apart from each other so as to define an isolating gap therebetween, a ring-shaped fl

Overvoltage arrester having a gas-filled housing, comprising two overvoltage arrester electrodes disposed across from each other in the housing, a tubular insulator body spacing said overvoltage arrester electrodes apart from each other so as to define an isolating gap therebetween, a ring-shaped flange integral with one of said overvoltage arrester electrodes and forming a first spark gap electrode, a ring-shaped metal cap having an annular, radially inward projecting flange, said inward projecting flange surrounding and spaced from said first spark gap electrode and pressed onto said tubular insulator body, and a contact spring connecting said metal cap to the other of said overvoltage arrester electrodes, said metal cap inward projecting flange forming a second spark gap electrode defining with said first spark gap electrode a spark gap having a defined clearance therebetween smaller than the clearance of said isolating gap, said cap being inwardly arched in the vicinity of said spark gap.