US3374399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distance protective relaying
Assignee: General Electric Co
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Filing: 1966-02-01
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Granted: 1968-03-19
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Clyde G Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:09
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/38; H02H3/382
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A DISTANCE RELAY RESPONSIVE TO THE CONDITIONS OF A FAULT ON AN ALTERNATING CURRENT POWER TRANSMISSION LINE, COMPRISING: (A) FIRST MEANS FOR COUPLING TO THE LINE AND RESPONSIVE TO LINE VOLTAGES FOR DEVELOPING REFERENCE VOLTAGES REPRESENTATIVE OF THE LINE VOLTAGES AND HAVING A CERTAIN PHASE RELATION THERETO; (B) SECOND MEANS FOR COUPLING TO A LINE AND RESPONSIVE TO LINE CURRENTS FOR DEVELOPING REPRESENTATIVE VOLTAGES RELATED TO THE LINE CURRENTS BY A PREDETERMINED CONSTANT IMPEDANCE AND BY A PREDETERMINED PHASE DISPLACEMENT THEREFROM; (C) THIRD MEANS CONNECTED TO SAID FIRST AND SECOND MEANS FOR DEVELOPING OPERATING VOLTAGES RELATED TO THE VECTOR COMBINATION OF SAID IMPEDANCE AND REFERENCE VOLTAGES; AND (D) FOURTH MEANS FOR DETECTING, DURING INTERMITTENT PERIODS OF SAID OPERATING VOLTAGES THAT ARE SUBSTANTIALLY DIFFERENT FROM HALF CYCLES OF THE LINE VOLTAGES, THE TIME RELATIONS OF A CERTAIN INSTANTANEOUS PORTION OF SUCCESSIVE CYCLES OF SAID REFERENCE VOLTAGES, AND
Claim 2
Dependent Claim
146 words
A DISTANCE RELAY RESPONSIVE TO THE CONDITIONS OF A FAULT ON AN ALTERNATING CURRENT POWER TRANSMISSION LINE, COMPRISING: (A) FIRST MEANS FOR COUPLING TO THE LINE AND RESPONSIVE TO LINE VOLTAGES FOR DEVELOPING REFERENCE VOLTAGES REPRESENTATIVE OF THE LINE VOLTAGES AND HAVING A CERTAIN PHASE RELATION THERETO; (B) SECOND MEANS FOR COUPLING TO A LINE AND RESPONSIVE TO LINE CURRENTS FOR DEVELOPING REPRESENTATIVE VOLTAGES RELATED TO THE LINE CURRENTS BY A PREDETERMINED CONSTANT IMPEDANCE AND BY A PREDETERMINED PHASE DISPLACEMENT THEREFROM; (C) THIRD MEANS CONNECTED TO SAID FIRST AND SECOND MEANS FOR DEVELOPING OPERATING VOLTAGES RELATED TO THE VECTOR COMBINATION OF SAID IMPEDANCE AND REFERENCE VOLTAGES; AND (D) FOURTH MEANS FOR DETECTING, DURING INTERMITTENT PERIODS OF SAID OPERATING VOLTAGES THAT ARE SUBSTANTIALLY DIFFERENT FROM HALF CYCLES OF THE LINE VOLTAGES, THE TIME RELATIONS OF A CERTAIN INSTANTANEOUS PORTION OF SUCCESSIVE CYCLES OF SAID REFERENCE VOLTAGES, AND
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |