Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
Over-voltage protection device comprising a plurality of stacks (1, 2) of series-connected, identical surge arrester sections (3), mutually electrically connected at their upper and lower ends, in which each arrester section (3) comprises an insulating casing containing a voltage-dependent resistor (4) series-connected with a spark gap assembly (5), and a triggering circuit (7, 8, 16) in parallel with the arrester stacks (1, 2), said triggering circuit comprising a plurality of series-connected control spark gaps (7), corresponding to the number of arrester sections (3) in each arrester stack (1, 2), and a triggering resistor (8) connected in series with the control sparks gaps, and cross-sections containing triggering impedances (16) from a connection point (10, 11) between two control spark gaps (7) only to a corresponding connection point (12, 13 and 14, 15, respectively) between two arrester sections (3) of each of the parallel arrester stacks (1, 2), said triggering circuit having a higher resistance and a lower ignition voltage than said arrester stacks.
Claim 2
Dependent Claim
162 words
Over-voltage protection device comprising a plurality of stacks (1, 2) of series-connected, identical surge arrester sections (3), mutually electrically connected at their upper and lower ends, in which each arrester section (3) comprises an insulating casing containing a voltage-dependent resistor (4) series-connected with a spark gap assembly (5), and a triggering circuit (7, 8, 16) in parallel with the arrester stacks (1, 2), said triggering circuit comprising a plurality of series-connected control spark gaps (7), corresponding to the number of arrester sections (3) in each arrester stack (1, 2), and a triggering resistor (8) connected in series with the control sparks gaps, and cross-sections containing triggering impedances (16) from a connection point (10, 11) between two control spark gaps (7) only to a corresponding connection point (12, 13 and 14, 15, respectively) between two arrester sections (3) of each of the parallel arrester stacks (1, 2), said triggering circuit having a higher resistance and a lower ignition voltage than said arrester stacks.
Claim 3
Dependent Claim
21 words
A device according to claim 1, in which control impedances (9) are connected in parallel with the control spark gaps (7).
Claim 4
Dependent Claim
14 words
A device according to claim 1, in which the triggering impedances (16) comprise resistors.
Claim 5
Dependent Claim
29 words
A device according to claim 1, in which the control spark gaps (7) and the series-connected triggering resistor (8) form a separate column which constitutes a triggering arrester (6).
Claim 6
Dependent Claim
37 words
A device according to claim 4, in which the arrester stacks (1, 2) are positioned concentrically around a centrally arranged triggering arrester (6), and in which said cross-connections extend radially outwardly in at least one horizontal plane.