US4477856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay spare circuit for a recloser relay
Assignee: General Electric Co
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Filing: 1982-09-30
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Granted: 1984-10-16
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Expires: 2002-09-30
Abstract
Abstract A relay spare circuit for a recloser relay provides an output signal selected to occur during a particular segment of the reclose cycle of a fault-responsive circuit breaker. A set of switches is provided to select which of a plurality of available recloses are to be used and where in the resulting reclose cycle the relay spare is to operate, and a logic circuit is provided which compares the selected switches with a counter responsive to advancement of the recloser relay through the reclose cycle, to provide the relay spare output signal at the selected point in the reclose cycle.
Inventors
- 👤 Robert P. DePuy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:51
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
A relay spare circuit for a recloser relay, comprising: (a) a first plurality of switches for developing a first series of signals defining which of a plurality of available relay reclosures are to occur; (b) a second plurality of switches for developing a second series of signals defining which of the plurality of available relay reclosures are to be accompanied by the occurrence of a relay spare; and (c) logic means for receiving the first and second series of signals and for developing a relay spare output signal for causing the relay spare to occur in accordance with the relay reclosures and relay spares selected using the first and second switches, and the condition of the recloser relay throughout a reclose cycle comprised of the relay reclosures which are to occur, and during which reclosure of the recloser relay is attempted.
Claim 2
Dependent Claim
141 words
A relay spare circuit for a recloser relay, comprising: (a) a first plurality of switches for developing a first series of signals defining which of a plurality of available relay reclosures are to occur; (b) a second plurality of switches for developing a second series of signals defining which of the plurality of available relay reclosures are to be accompanied by the occurrence of a relay spare; and (c) logic means for receiving the first and second series of signals and for developing a relay spare output signal for causing the relay spare to occur in accordance with the relay reclosures and relay spares selected using the first and second switches, and the condition of the recloser relay throughout a reclose cycle comprised of the relay reclosures which are to occur, and during which reclosure of the recloser relay is attempted.
Claim 3
Dependent Claim
25 words
The relay spare circuit of claim 1 wherein there are four available reclosures, and wherein the first and second series of switches include four switches.
Claim 4
Dependent Claim
20 words
The relay spare circuit of claim 1 in which most of the components within the logic means are electronic components.
Claim 5
Dependent Claim
26 words
The relay spare circuit of claim 3 wherein the logic means automatically causes the relay spare output signal to occur in relation to selected relay reclosures.
Claim 6
Dependent Claim
31 words
The relay spare circuit of claim 3 wherein the time delay between the occurrence of a relay spare and the occurrence of a reclose is not responsive to a timing circuit.
Claim 7
Dependent Claim
45 words
The relay spare circuit of claim 3 wherein the time delay between the occurrence of a relay spare and the occurrence of a reclose is a fixed time delay determined as a function of the components which comprise the recloser relay and the circuit breaker.
Claim 8
Dependent Claim
38 words
The relay spare circuit of claim 3 wherein a relay spare corresponding to a selected reclose is selected, and wherein the logic means causes the relay spare output signal to be present in conjunction with the selected reclose.
Claim 9
Dependent Claim
31 words
The relay spare circuit of claim 7 wherein the relay spare output signal remains present during the remainder of the reclose cycle, whether or not subsequent relay spares have been selected.
Claim 10
Dependent Claim
35 words
The relay spare circuit of claim 8 wherein a lockout signal is provided which indicates unsuccessful reclosure at the end of the reclose cycle, and wherein the lockout signal inhibits the relay spare output signal.
Claim 11
Dependent Claim
49 words
The relay spare circuit of claim 3 wherein the earliest relay spare selected corresponds to a non-selected reclose, wherein at least one earlier reclose has been selected, and wherein the logic means causes the relay spare output signal to be present in conjunction with the closest preceeding selected reclose.
Claim 12
Dependent Claim
31 words
The relay spare circuit of claim 10 wherein the relay spare output signal remains present during the remainder of the reclose cycle, whether or not subsequent relay spares have been selected.
Claim 13
Dependent Claim
35 words
The relay spare circuit of claim 11 wherein a lockout signal is provided which indicates unsuccessful reclosure at the end of the reclose cycle, and wherein the lockout signal inhibits the relay spare output signal.
Claim 14
Dependent Claim
44 words
The relay spare circuit of claim 3 wherein the earliest relay spare selected corresponds to a non-selected reclose, wherein no earlier reclosures have been selected, and wherein the logic means causes the relay spare output signal to remain present during the entire reclose cycle.
Claim 15
Dependent Claim
31 words
The relay spare circuit of claim 13 wherein the relay spare output signal remains present regardless of subsequent reclosures which have been selected, or other relay spares which have been selected.
Claim 16
Dependent Claim
35 words
The relay spare circuit of claim 13 wherein a lockout signal is provided which indicates unsuccessful reclosure at the end of the reclose cycle, and wherein the lockout signal inhibits the relay spare output signal.
References Cited (Backward Citations)
US3381177A
Cited
US3878436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |