US3710239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly sensitive fault localization apparatus capable of locating multiple faults along a section of an electric power transmission line
Assignee: Toshiba Corp
•
Filing: 1971-04-02
•
Granted: 1973-01-09
•
Expires: 1991-04-02
Abstract
Abstract A surge receiving type fault localizer includes a plurality of counter devices respectively disposed in different stages at one end of a section of an electric power transmission line to be inspected. The starting operation of the counter devices is controlled according to a predetermined sequence every time a surge is received by a counter control device disposed in the corresponding stages. A signal wave receiving device having outputs connected to the corresponding counter devices is provided for stopping a counting operation every time a signal is received from the other end of the section. Thus, the counter devices operate cyclically in turn every time a surge is received and the most recent content of the counter devices is read out by the operation of a relay device which is provided for protecting the section from an internal fault.
Inventors
- 👤 T Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:02
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
265 words
In a fault localization apparatus for locating any faults present along an electric power transmission line, said fault localizer comprising: a surge receiver located at one end of a section of said electric power transmission line wherein any of said faults are to be located for sequentially receiving surges due to any of said faults along said section and for generating output signals corresponding thereto, a starting pulse generating circuit connected to said surge receiver to be sequentially energized by the output signals from the surge receiver, at least two counter devices disposed in different stages each of said counter devices being capable of providing information relaTing to different ones of said faults along said section, at least two starting control devices disposed in different stages corresponding to said counter devices for starting the counting operation of the responsive counter devices, said starting control devices being connected to an output of said starting pulse generating circuit so as to be sequentially started in a predetermined order by the output signals therefrom in accordance with the sequential receipt of any of said faults by said surge receiver, a signal wave receiving device having outputs connected to said corresponding counter devices for sequentially stopping the counting operation of particular ones of said counter devices in response to the sequential receiving of corresponding surges from the other end of said section due to any of said faults along said section, and a read out device connected to the outputs of said counter devices for reading out the content thereof to thereby indicate the locations of any detected faults.
Claim 2
Dependent Claim
265 words
In a fault localization apparatus for locating any faults present along an electric power transmission line, said fault localizer comprising: a surge receiver located at one end of a section of said electric power transmission line wherein any of said faults are to be located for sequentially receiving surges due to any of said faults along said section and for generating output signals corresponding thereto, a starting pulse generating circuit connected to said surge receiver to be sequentially energized by the output signals from the surge receiver, at least two counter devices disposed in different stages each of said counter devices being capable of providing information relaTing to different ones of said faults along said section, at least two starting control devices disposed in different stages corresponding to said counter devices for starting the counting operation of the responsive counter devices, said starting control devices being connected to an output of said starting pulse generating circuit so as to be sequentially started in a predetermined order by the output signals therefrom in accordance with the sequential receipt of any of said faults by said surge receiver, a signal wave receiving device having outputs connected to said corresponding counter devices for sequentially stopping the counting operation of particular ones of said counter devices in response to the sequential receiving of corresponding surges from the other end of said section due to any of said faults along said section, and a read out device connected to the outputs of said counter devices for reading out the content thereof to thereby indicate the locations of any detected faults.
Claim 3
Dependent Claim
63 words
A fault localization apparatus according to claim 1, wherein, said starting control devices disposed in different stages are respectively linked to each other through time delay circuits, whereby the starting control devices will cyclically generate an output signal to operate said counter devices according to a predetermined sequence as well as according to a predetermined time delay every time a surge is received.
Claim 4
Dependent Claim
96 words
A fault localization apparatus according to claim 1, wherein said signal wave receiving device includes at least two counter stopping devices which are disposed in different stages corresponding to said counter devices disposed in different stages, and wherein said counter stopping devices function to stop the counting operation of the counter device disposed in the corresponding stage and at the same time clear the content of the counter device disposed in the next stage, as well as resetting the counter starting control device disposed in the next stage for preparation of receipt of the next surge.
Claim 5
Dependent Claim
64 words
A fault localization apparatus according to claim 1, wherein, said starting pulse generating circuit includes a memory circuit to hold the signal caused by the receiving of a surge for an interval of time from the receiving of a surge to the arrival of the signal wave, said held signal being supplied to said counter starting control devices in the form of a pulse.
Claim 6
Dependent Claim
26 words
A fault localization apparatus according to claim 3, wherein, said counter devices have outputs respectively connected to said counter stopping devices disposed in the corresponding stages.
Claim 7
Dependent Claim
70 words
A fault localization apparatus according to claim 1, wherein, said read out device includes a read out order selection device connected to the outputs of said counter devices and a protecting relay device for effecting an automatic read out operation when the relay device responds to an internal fault in the section of said electrical power transmission line, whereby the most recent content of said counter devices is read out.
Claim 8
Dependent Claim
26 words
A fault localization apparatus according to claim 6, wherein, said relay device includes a device for preventing the receipt of sequential surges upon the operation thereof.
Claim 9
Dependent Claim
45 words
A fault apparatus according to claim 1, wherein said counter devices include a device for resetting the respective corresponding counter device, in response to an over counting operation of the corresponding counter device which may occur in the absence of receipt of a signal wave.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |