US3296492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for relay protection of rectifier transformers
Assignee: Novocherkassky Politekhnichesky Institut Sergo Ordzhonikidze
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Filing: 1963-10-22
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Granted: 1967-01-03
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Expires: 1983-10-22
Abstract
No abstract record available.
Inventors
- 👤 Drozdov Alexandr Dmitrievich
- 👤 Zasypkin Alexandr Sergeevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/04; H02H7/10; H02H7/12; H02H7/1209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A TRANSFORMER RELAY PROTECTION SYSTEM COMPRISING: A SATURATED TRANSFORMER WITH THREE CORES, A PRIMARY WINDING WOUND ON SAID THREE CORES, A SOURCE OF OPERATING POTENTIAL CONNECTED TO THE PRIMARY WINDING, A SECONDARY WINDING WOUND ON THE FIRST TWO OF SAID THREE CORES, A RELAY CONNECTED ACROSS SAID SECONDARY WINDING, MEANS IN CIRCUIT WITH SAID SOURCE AND RESPONSIVE TO ACTUATION OF THE RELAY BY CURRENT FLOW IN THE SECONDARY WINDING TO DISCONNECT THE SOURCE FROM THE PRIMARY WINDING, AN AUXILIARY SECONDARY WINDING WOUND ON SAID THIRD CORE, A BRAKING WINDING WOUND ON THE FIRST TWO OF SAID CORES, A SHORTCIRCUITED WINDING WOUND ON THE SAME SAID TWO CORES, A RECTIFIER CONNECTED BETWEEN THE AUXILIARY SECONDARY WINDING TO FEED SAID BRAKING WINDING, SAID RELAY BEING ACTUATED WHEN NORMAL RATED CURRENT OF THE PRIMARY REACHES A PREDETERMINED VALUE AND ON SUDDEN PRIMARY CURRENT SURGES.
Claim 2
Dependent Claim
141 words
A TRANSFORMER RELAY PROTECTION SYSTEM COMPRISING: A SATURATED TRANSFORMER WITH THREE CORES, A PRIMARY WINDING WOUND ON SAID THREE CORES, A SOURCE OF OPERATING POTENTIAL CONNECTED TO THE PRIMARY WINDING, A SECONDARY WINDING WOUND ON THE FIRST TWO OF SAID THREE CORES, A RELAY CONNECTED ACROSS SAID SECONDARY WINDING, MEANS IN CIRCUIT WITH SAID SOURCE AND RESPONSIVE TO ACTUATION OF THE RELAY BY CURRENT FLOW IN THE SECONDARY WINDING TO DISCONNECT THE SOURCE FROM THE PRIMARY WINDING, AN AUXILIARY SECONDARY WINDING WOUND ON SAID THIRD CORE, A BRAKING WINDING WOUND ON THE FIRST TWO OF SAID CORES, A SHORTCIRCUITED WINDING WOUND ON THE SAME SAID TWO CORES, A RECTIFIER CONNECTED BETWEEN THE AUXILIARY SECONDARY WINDING TO FEED SAID BRAKING WINDING, SAID RELAY BEING ACTUATED WHEN NORMAL RATED CURRENT OF THE PRIMARY REACHES A PREDETERMINED VALUE AND ON SUDDEN PRIMARY CURRENT SURGES.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |