US3629685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static converter station connected to a dc transmission line over a dc reactor with lightning arrester protection means
Assignee: ABB Norden Holding AB
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Filing: 1970-11-20
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Granted: 1971-12-21
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Expires: 1990-11-20
Abstract
Abstract A static converter station connected to a DC transmission line over a DC reactor is provided with lightning arrester protection means which includes a spark gap stack connected to the DC line and provided with a starting mechanism for its ignition, and with an arrangement responsive to earth faults in the station to control the starting mechanism to trigger the lightning arrester.
Inventors
- 👤 Arne Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:07
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/28; H02H9/00; H02H9/04; H02H9/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
60 words
In combination with a static converter station connected to a DC transmission line over a DC reactor, lightning arrester protection means comprising a spark gap stack (6) connected to the DC line and provided with a starting mechanism (15, 18, 19) for its ignition, and means (10, 7) responsive to earth faults in the station to control said starting mechanism.
Claim 2
Dependent Claim
60 words
In combination with a static converter station connected to a DC transmission line over a DC reactor, lightning arrester protection means comprising a spark gap stack (6) connected to the DC line and provided with a starting mechanism (15, 18, 19) for its ignition, and means (10, 7) responsive to earth faults in the station to control said starting mechanism.
Claim 3
Dependent Claim
23 words
In a combination according to claim 1, said starting mechanism comprising a thyristor stack (15) in series with the spark gap stack (11).
Claim 4
Dependent Claim
18 words
In a combination according to claim 1, said fault-responsive means comprising current-sensitive member (8,9) connected in the station.
Claim 5
Dependent Claim
48 words
In a combination according to claim 1, for a static converter station provided with an overvoltage arrester (5) connected in parallel to the lightning arrester protection means (6), the voltage stability of the lightning arrester protection means in blocked state exceeding the ignition voltage of said over-voltage arrester.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |