US3733520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for limiting the residual level during superimposed over-voltage conditions in a surge diverter
Assignee: ABB Norden Holding AB
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Filing: 1972-04-28
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Granted: 1973-05-15
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Expires: 1992-04-28
Abstract
Abstract In a surge diverter, in order to limit the residual level during superimposed over-voltage conditions, a plurality of spark gap stacks with associated non-linear resistors are provided with a shunt spark gap shunting at least one spark gap stack with the associated non-linear resistor. A shunt impedance is provided shunting at least one spark gap stack which is shunted by the shunt spark gap. The surge diverter includes a sufficient number of shunt gaps to prevent the total voltage over the diverter upon super-imposed over-voltage conditions from exceeding the protection level of the diverter.
Inventors
- 👤 A Schei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/20; H02H3/22; H01; H01T; H01T4/00; H01T4/16; H02H9/00; H02H9/04; H02H9/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
49 words
In a surge diverter, means to limit the residual level during superimposed over-voltage conditions, said means comprising a plurality of spark gap stacks (1) with associated serially connected non-linear resistors, and a shunt spark gap shunting at least one spark gap stack (1) with the associated non-linear resistor (2).
Claim 2
Dependent Claim
49 words
In a surge diverter, means to limit the residual level during superimposed over-voltage conditions, said means comprising a plurality of spark gap stacks (1) with associated serially connected non-linear resistors, and a shunt spark gap shunting at least one spark gap stack (1) with the associated non-linear resistor (2).
Claim 3
Dependent Claim
24 words
In a device according to claim 1, said shunt spark gap shunting two spark gap stacks (1) having a non-linear resistor (2) connected therebetween.
Claim 4
Dependent Claim
28 words
In a device according to claim 1, having a shunt impedance (5) shunting at least one spark gap stack (1) which is shunted by the shunt spark gap.
Claim 5
Dependent Claim
39 words
In a device according to claim 1, the surge diverter includes a sufficient number of shunt gaps (4) to prevent total voltage (Ua) over the diverter upon super-imposed over-voltage conditions from exceeding the prOtection level (Un) of the diverter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |