US3881766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage overload arrester for a high-voltage switching system
Assignee: Siemens AG
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Filing: 1973-09-20
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Granted: 1975-05-06
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Expires: 1993-09-20
Abstract
Abstract A voltage overload arrester for a high-voltage switching system of the type including a metallic switching housing containing a gaseous insulating medium, and a metallic overload arrester housing, communicative with the switching housing and containing the same gaseous insulating medium. A plurality of discharge current resistor elements are disposed in a columnar arrangement in the arrester housing for discharging voltage overload current surges, and are constructed of an electrically conductive metallic composition having a zinc oxide base. The resistance elements of the inventive apparatus eliminate the need for spark gaps for discharging the voltage overload current surges.
Inventors
- 👤 Rudolf Pratsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:21
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/112; H01C7/12; H01T; H01T4/00; H01T4/08; H02; H02B; H02B13/00; H02B13/02; H02B13/035; H02B13/065
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
In a high-voltage switching system of the type including a switching housing containing a gaseous insulating medium, and an overload arrester housing, communicative with the switching housing and containing a gaseous insulating medium having a dielectric strength the same as said medium contained in said switching system housing, a voltage overload arrester comprising only discharge current resistance means, disposed in said arrester housing, and constructed of an electrically conductive material having a zinc oxide base, for discharging current surges flowing through said switching system.
Claim 2
Dependent Claim
84 words
In a high-voltage switching system of the type including a switching housing containing a gaseous insulating medium, and an overload arrester housing, communicative with the switching housing and containing a gaseous insulating medium having a dielectric strength the same as said medium contained in said switching system housing, a voltage overload arrester comprising only discharge current resistance means, disposed in said arrester housing, and constructed of an electrically conductive material having a zinc oxide base, for discharging current surges flowing through said switching system.
Claim 3
Dependent Claim
29 words
The voltage overload arrester recited in claim 1, wherein said resistance means comprises a plurality of electrical resistors arranged in columnar fashion and disposed axially within said arrester housing.
Claim 4
Dependent Claim
29 words
The voltage overload arrester recited in claim 2, wherein said switching system housing and said arrester housing are constructed of metallic material and are formed as an integral unit.
Claim 5
Dependent Claim
25 words
The voltage overload arrester recited in claim 3, wherein said gaseous insulating medium contained in said arrester and said switching system housings comprises sulfur hexafluoride.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |