US5091690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for monitoring operational condition of circuit components
Assignee: General Electric Co
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Filing: 1990-11-15
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Granted: 1992-02-25
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Expires: 2010-11-15
Abstract
Abstract A method and apparatus for enabling the continuous monitoring of the operational state of circuit components includes a scheme for generating a plurality of voltage signals representing neutral-to-line voltages of the system and adding to each of those signals a second signal, each second signal being identical. This addition is done vectorially to yield a modified signal. A representation of the modified signal as acted upon by the circuit to be monitored is compared with a representation of the neutral-to-line voltage signal to yield an output signal representative of the operational state of the circuit components.
Inventors
- 👤 Michael J. D'Antonio
- 👤 Irving A. Gibbs
- 👤 Lawrence J. Lane
- 👤 Rodney A. Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:26
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/185; G08B29/00; G08B29/02; H; H03; H03F; H03F1/00; H03F1/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A method of monitoring the operational status of circuit components in a polyphase electrical system operating on line-to-line voltages comprising the steps: a) generating a plurality of voltage signals respectively representing neutral-to-line voltages of said system; b) vectorially adding to each of said voltage signals an identical signal whereby there results a corresponding plurality of modified signals representing neutral-to-line voltages but no modification in line-to-line voltages and voltage representations thereof; and, c) examining said modified signal to determine the operational status the circuit components.
Claim 2
Independent Claim
84 words
A method of monitoring the operational status of circuit components in a polyphase electrical system operating on line-to-line voltages comprising the steps: a) generating a plurality of voltage signals respectively representing neutral-to-line voltages of said system; b) vectorially adding to each of said voltage signals an identical signal whereby there results a corresponding plurality of modified signals representing neutral-to-line voltages but no modification in line-to-line voltages and voltage representations thereof; and, c) examining said modified signal to determine the operational status the circuit components.
Claim 3
Independent Claim
118 words
A method of monitoring circuit components in a polyphase electrical system operating on line-to-line voltages comprising the steps: a) generating a plurality of voltage signals respectively representing neutral-to-line voltages of said system; b) vectorially adding to each of said voltage signals an identical signal whereby there results a corresponding plurality of modified signals representing neutral-to-line voltages but no modification in line-to-line voltages and voltage representations thereof and, c) comparing, for each phase of said polyphase system a representation of the respective modified signal as acted upon by the circuit components to be monitored with a representation of an associated voltage signal to provide an output signal representation of the operational condition of the circuit components to be tested.
Claim 4
Independent Claim
118 words
A method of monitoring circuit components in a polyphase electrical system operating on line-to-line voltages comprising the steps: a) generating a plurality of voltage signals respectively representing neutral-to-line voltages of said system; b) vectorially adding to each of said voltage signals an identical signal whereby there results a corresponding plurality of modified signals representing neutral-to-line voltages but no modification in line-to-line voltages and voltage representations thereof and, c) comparing, for each phase of said polyphase system a representation of the respective modified signal as acted upon by the circuit components to be monitored with a representation of an associated voltage signal to provide an output signal representation of the operational condition of the circuit components to be tested.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |