US3158783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor bank protective means having unbalance current compensation
Assignee: McGraw Edison Co
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Filing: 1958-09-29
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Granted: 1964-11-24
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Expires: 1978-09-29
Abstract
No abstract record available.
Inventors
- 👤 Peter M Minder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:18
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN COMBINATION WITH A POLYPHASE ALTERNATING CURRENT POWER SYSTEM, A PLURALITY OF INDIVIDUAL CAPACITOR UNITS ADAPTED TO BE CONNECTED IN TWO STAR PORTIONS TO SAID POWER SYSTEM A CURRENT TRANSFORMER CONNECTED BETWEEN THE NEUTRALS, OF SAID STAR PORTIONS, THE VALUES OF THE INDIVIDUAL CAPACITOR UNITS VARYING FROM RATED CAPACITANCE AND CAUSING VARIATIONS IN IMPEDANCE BETWEEN CORRESPONDING PHASES IN SAID STAR PORTIONS AND AN UNBALANCE CURRENT TO FLOW BETWEEN SAID NEUTRALS, WHEREBY AN ALTERNATING CURRENT SIGNAL IS DEVELOPED BY SAID CURRENT TRANSFORMER, MEANS FOR DERIVING AN ALTERNATING CURRENT VOLTAGE OF THE SAME FREQUENCY AS THE VOLTAGE OF SAID POWER SYSTEM, MEANS INCLUDING A VARIABLE REACTANCE FOR VARYING THE MAGNITUDE AND SHIFTING THE PHASE OF SAID DERIVED VOLTAGE, MEANS FOR ADDING THE VOLTAGE OUTPUT FROM SAID LAST-NAMED MEANS AND THE VOLTAGE DEVELOPED ACROSS SAID CURRENT TRANSFORMER, AND VOLTAGE SENSITIVE MEANS ACTUATED BY THE OUTPUT OF SAID ADDING MEANS.
Claim 2
Dependent Claim
146 words
IN COMBINATION WITH A POLYPHASE ALTERNATING CURRENT POWER SYSTEM, A PLURALITY OF INDIVIDUAL CAPACITOR UNITS ADAPTED TO BE CONNECTED IN TWO STAR PORTIONS TO SAID POWER SYSTEM A CURRENT TRANSFORMER CONNECTED BETWEEN THE NEUTRALS, OF SAID STAR PORTIONS, THE VALUES OF THE INDIVIDUAL CAPACITOR UNITS VARYING FROM RATED CAPACITANCE AND CAUSING VARIATIONS IN IMPEDANCE BETWEEN CORRESPONDING PHASES IN SAID STAR PORTIONS AND AN UNBALANCE CURRENT TO FLOW BETWEEN SAID NEUTRALS, WHEREBY AN ALTERNATING CURRENT SIGNAL IS DEVELOPED BY SAID CURRENT TRANSFORMER, MEANS FOR DERIVING AN ALTERNATING CURRENT VOLTAGE OF THE SAME FREQUENCY AS THE VOLTAGE OF SAID POWER SYSTEM, MEANS INCLUDING A VARIABLE REACTANCE FOR VARYING THE MAGNITUDE AND SHIFTING THE PHASE OF SAID DERIVED VOLTAGE, MEANS FOR ADDING THE VOLTAGE OUTPUT FROM SAID LAST-NAMED MEANS AND THE VOLTAGE DEVELOPED ACROSS SAID CURRENT TRANSFORMER, AND VOLTAGE SENSITIVE MEANS ACTUATED BY THE OUTPUT OF SAID ADDING MEANS.
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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |