US3801872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-shot reclosing relay having means for remembering trip and reclosure status in the event of loss of power
Assignee: ITE Imperial Corp
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Filing: 1973-02-27
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Granted: 1974-04-02
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Expires: 1993-02-27
Abstract
Abstract An automatic reclosure employing latching relay structures. The recloser is designed to trip and reclose a selected number of times, dependent upon the particular preset program selected. The latching relay devices are capable of ''''remembering'''' the number of tripping operations and reclosure operations which have occurred prior to any loss in power for the system so that this information is retained when power returns to the system. The automatic reclosure circuitry prevents successive tripping operations from being performed in the absence of intervening reclosure operations and vice versa. In addition thereto, the circuitry is responsive to the state of the circuit breaker being controlled by the recloser system and not to the state of the control power.
Inventors
- 👤 S Zocholl
- 👤 P Farinas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:34
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/07
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
161 words
Recloser means for monitoring the status of a circuit breaker movable to a tripped and a closed position and having means for generating mutually exclusive first and second signals representing the occurrence of trip and close operations respectively, said monitoring means comprising: trip count means for receiving said first signals to count and store the number of tripping operations which may occur; close count means for receiving said second signals to count and store the number of closing operations which may occur; reset means for resetting said close count means after a predetermined time interval; said close count means including means responsive to at least one of said seCond signals for activating said reset means; reclose activating means for generating a reclose activating signal for reclosing the circuit breaker; variable delay means; said trip count means including delay means for altering the delay interval of said delay means responsive to the number of trip counts accumulated by said trip count means.
Claim 2
Dependent Claim
161 words
Recloser means for monitoring the status of a circuit breaker movable to a tripped and a closed position and having means for generating mutually exclusive first and second signals representing the occurrence of trip and close operations respectively, said monitoring means comprising: trip count means for receiving said first signals to count and store the number of tripping operations which may occur; close count means for receiving said second signals to count and store the number of closing operations which may occur; reset means for resetting said close count means after a predetermined time interval; said close count means including means responsive to at least one of said seCond signals for activating said reset means; reclose activating means for generating a reclose activating signal for reclosing the circuit breaker; variable delay means; said trip count means including delay means for altering the delay interval of said delay means responsive to the number of trip counts accumulated by said trip count means.
Claim 3
Dependent Claim
45 words
The device of claim 1 further comprising lockout means to deactivate said reclose activating means; programmable switch means coupled between said close count means and said lockout means for adjustably controlling the activation of said lockout means dependent upon the number of accumulated close counts.
Claim 4
Dependent Claim
99 words
The device of claim 1 wherein said trip count means comprises a plurality of stages of latching relay means, at least one set of cooperating contacts, a set winding for closing said contacts when energized, a reset winding for opening said contacts when energized and a latching device for maintaining said contacts in the state to which they were last operated even during the occurrence of loss of power to the recloser to retain the trip count, thereby enabling said trip count means to resume the sequence of the circuit breaker when power is restored to said recloser means.
Claim 5
Dependent Claim
99 words
The device of claim 1 wherein said close count means comprises a plurality of stages of latching relay means, at least one set of cooperating contacts, a set winding for closing said contacts when energized, a reset winding for opening said contacts when energized and a latching device for maintaining said contacts in the state to which they were last operated even during the occurrence of loss of power to the recloser to retain the close count, thereby enabling said trip count means to resume the sequence of the circuit breaker when power is restored to said recloser means.
Claim 6
Dependent Claim
30 words
The device of claim 3 wherein said latch device is adapted to prevent said cooperating contacts from changing their state when both set and reset windings are energized substantially simultaneously.
Claim 7
Dependent Claim
115 words
The device of claim 1 wherein said trip and close count means are each comprised of n stages of latching relay means each having a pair of cooperating contacts, a set winding for closing said contacts when energized, a reset winding for opening said contacts when energized, and a latch device for retaining said contacts in the position to which they were last operated; the ''''nth'''' latching relay cooperating contacts of said trip count means being adapted to couple said second signal to the set winding of the ''''nth'''' latching relay stage of said close count means when its set winding is energized by said first signal where n 1, 2, 3 . . .
Claim 8
Dependent Claim
48 words
The device of claim 6 wherein the cooperating contacts of the ''''nth'''' latching relay stage of said close count means are adapted to couple said first signal to the nth latching relay stage of said trip count means when its set winding is energized by said second signal.
Claim 9
Dependent Claim
72 words
The device of claim 3 wherein said latching relays are each further comprised of a second set of cooperating contacts; said set and reset windings each being adapted to respectively close and open both sets of cooperating contacts when energized; said latching device being comprised of a permanent magnet positioned adjacent both sets of cooperating contacts to retain the two sets of contacts in the last condition to which they were operated.
Claim 10
Dependent Claim
21 words
The device of claim 1 further comprising means responsive to said first signal for preventing operation of said close count means.
Claim 11
Dependent Claim
23 words
The device of claim 1 further comprising means responsive to said first signal for activating said trip count means after a predetermined delay.
Claim 12
Dependent Claim
64 words
The device of claim 1 wherein said trip count means is comprised of a plurality of stages of latching relays at least equal in number to the number of closing operations which said close count means is capable of counting; said close count means including meAns for coupling the stage of said trip count means associated with the count of said close count means.
Claim 13
Dependent Claim
64 words
The device of claim 1 wherein said close count means is comprised of a plurality of stages of latching relays at least equal in number to the number of tripping operations which said close count means is capable of counting; said trip count means including means for coupling the stage of said close count means associated with the count of said trip count means.
Claim 14
Dependent Claim
60 words
The device of claim 1 further comprising means for reclosing said circuit breaker after each tripping operation; variable time delay means responsive to a tripping operation for delaying the operation of said reclosing means; means coupled to said trip count means for adjusting the delay period of said time delay means dependent upon the count of said trip count means.
Claim 15
Dependent Claim
23 words
The device of claim 13 further comprising means responsive to said second signal for deactivating said time delay means and said reclosing means.
References Cited (Backward Citations)
US3440491A
Cited
US3416035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |