US3832601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase comparison relaying apparatus with two-count by-pass circuit
Assignee: ABB Inc USA
•
Filing: 1973-08-09
•
Granted: 1974-08-27
•
Expires: 1993-08-09
Abstract
Abstract A phase comparison unblocking relaying network which includes means to trip the circuit breaker upon the occurrence of a plural number of phase comparisons when the phase comparing information between the local and remote relaying stations has a lesser time overlap than the normal time for which the security timer is set and which will, in the event of a time overlap of a predetermined interval greater than said normal time interval, trip the breaker without waiting for more than one phase comparison.
Inventors
- 👤 W Hinman
- 👤 R Gonnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:08
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/28; H02H3/30; H02H3/302
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
213 words
A phase comparing relay comprising a phase comparing network having first and second input circuits and an output circuit, said network being effective to actuate its said output circuit solely when the phase of the pulsing signals supplied to its said input circuits are within a predetermined phase relationship, a first timer having its input connected to said output circuit of said comparing network and having an output actuated at the end of a first predetermined time interval following said actuation of said output circuit of said comparing network, a second timer having its input connected to said output of said first timer and having an output actuated at the end of a second predetermined time interval following said actuation of said output of said first timer, a counting network having its input connected to said output of said first timer and having an output actuated as a consequence of a plural number of said actuations of said first timer, a breaker tripping network, and connecting means interconnecting said tripping network to said outputs of said second timer and of said counting network, said connecting means being effective to actuate said tripping network as a consequence of said actuation of said output of either of said second timer or of said counting network.
Claim 2
Dependent Claim
213 words
A phase comparing relay comprising a phase comparing network having first and second input circuits and an output circuit, said network being effective to actuate its said output circuit solely when the phase of the pulsing signals supplied to its said input circuits are within a predetermined phase relationship, a first timer having its input connected to said output circuit of said comparing network and having an output actuated at the end of a first predetermined time interval following said actuation of said output circuit of said comparing network, a second timer having its input connected to said output of said first timer and having an output actuated at the end of a second predetermined time interval following said actuation of said output of said first timer, a counting network having its input connected to said output of said first timer and having an output actuated as a consequence of a plural number of said actuations of said first timer, a breaker tripping network, and connecting means interconnecting said tripping network to said outputs of said second timer and of said counting network, said connecting means being effective to actuate said tripping network as a consequence of said actuation of said output of either of said second timer or of said counting network.
Claim 3
Dependent Claim
20 words
The relay of claim 1 in which said second predetermined time interval is less than said first predetermined time interval.
Claim 4
Dependent Claim
12 words
The relay of claim 2 in which said plural number is two.
Claim 5
Dependent Claim
12 words
The relay of claim 1 in which said plural number is two.
Claim 6
Dependent Claim
33 words
The relay of claim 4 in which said pulsing signals have a frequency of 60 hertz, said first predetermined time interval approximates 3 milliseconds and said second predetermined time interval approximates 2 milliseconds.
Claim 7
Dependent Claim
38 words
The relay of claim 1 in which shunt means is provided to connect said tripping network to said output of said first timer in shunt relationship with at least one of said second timer and said counting network.
Claim 8
Dependent Claim
20 words
The relay of claim 6 in which said shunt means shunts both of said second timer and said counting network.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |