US3777218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-clad high-voltage switching system
Assignee: Siemens AG
•
Filing: 1972-09-18
•
Granted: 1973-12-04
•
Expires: 1992-09-18
Abstract
Abstract An overvoltage arrester for a metal-clad high-voltage switching system is provided in a separate housing which is filled with an insulating heavy gas. The separate housing contains a spark gap arranged in a heavy gas atmosphere which is the same as the insulating heavy gas filled within the metal encapsulation for the switching system. The separate housing is connected with the encapsulation via a valve-controlled gas line. The overvoltage arrester is particularly well suited for metal-clad high-voltage switching systems that are insulated by sulfur hexafluoride.
Inventors
- 👤 C Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:32
CPC Classifications
H; H02; H02B; H02B13/00; H02B13/02; H02B13/035
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A metal-clad high-voltage switching system, comprising: a metal encapsulation enclosing the high voltage switches of the system, said encapsulation forming a gas space filled with a gas, heavier than air, which is under pressure; an overvoltage arrester consisting of a separate housing providing a spark gap therein as an overvoltage protection for the switching system, said separate housing being arranged outside of said encapsulation and filled with a heavy gas, and said separate housing being connected with said gas space of the encapsulation by means of a small pressure equalization opening; and a valve-controlled gas line for directly connecting the interior of said separate housing with the gas space of said encapsulation by means of said pressure equalization opening, including a voltage overload responsive valve for controlling the flow of said gas between said arrester housing and said encapsulation, said valve closing said gas line and preventing flow of said gas from said encapsulation to said arrester housing upon the occurrence of a voltage overload of said overvoltage arrester.
Claim 2
Dependent Claim
169 words
A metal-clad high-voltage switching system, comprising: a metal encapsulation enclosing the high voltage switches of the system, said encapsulation forming a gas space filled with a gas, heavier than air, which is under pressure; an overvoltage arrester consisting of a separate housing providing a spark gap therein as an overvoltage protection for the switching system, said separate housing being arranged outside of said encapsulation and filled with a heavy gas, and said separate housing being connected with said gas space of the encapsulation by means of a small pressure equalization opening; and a valve-controlled gas line for directly connecting the interior of said separate housing with the gas space of said encapsulation by means of said pressure equalization opening, including a voltage overload responsive valve for controlling the flow of said gas between said arrester housing and said encapsulation, said valve closing said gas line and preventing flow of said gas from said encapsulation to said arrester housing upon the occurrence of a voltage overload of said overvoltage arrester.
Claim 3
Dependent Claim
17 words
A metal-clad high-voltage switching system as recited in claim 1, wherein said valve comprises a flow-dependent valve.
Claim 4
Dependent Claim
17 words
A metal-clAd high-voltage switching system as recited in claim 1, wherein said valve comprises a pressure-dependent valve.
Claim 5
Dependent Claim
33 words
A metal-clad high-voltage switching system as recited in claim 1, wherein said valve comprises an electrically controlled valve, said valve being operated as a function of a current flowing through said overvoltage arrester.
Claim 6
Dependent Claim
23 words
A metal-clad high-voltage switching system as recited in claim 1, wherein said gas line is attached to grounded portions of said separate housing.
Claim 7
Dependent Claim
16 words
A metal-clad high-voltage switching system as recited in claim 1, wherein said gas is sulfur hexafluoride.
Claim 8
Dependent Claim
36 words
A metal-clad high-voltage switching system as recited in claim 1, wherein said separate housing includes a rupture diaphragm which releases an exit opening in the event said over-voltage arrester fails, thereby preventing said housing from bursting.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |