GB1274117A - Improvements in or relating to overcurrent or overload protective arrangements having graded operating times - Google Patents
Improvements in or relating to overcurrent or overload protective arrangements having graded operating timesInfo
- Publication number
- GB1274117A GB1274117A GB5529870A GB5529870A GB1274117A GB 1274117 A GB1274117 A GB 1274117A GB 5529870 A GB5529870 A GB 5529870A GB 5529870 A GB5529870 A GB 5529870A GB 1274117 A GB1274117 A GB 1274117A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relays
- network
- elements
- overcurrent
- operating times
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/30—Staggered disconnection
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
1,274,117. Protective arrangements. SPRECHER & SCHUH A.G. 20 Nov., 1970 26 Nov., 1969], No. 55298/70. Heading H2K. An overload protective arrangement for a network comprises a plurality of time-delay relays 6a ... 6e having elements to adjust their time delays in steps, circuit breakers 7a ... 7e controlled by the relays and a computer 9 connected to the relays to determine the location of a fault and effective to cause the setting of the adjusting elements of the relays so that the relay or relays 6c, 6d nearest the fault is or are set to operate in the shortest time t 0 and that or those nearer the supply or supplies 1, 10 to the network have progressively increasing operating times t 1 , t 2 . In a network having one supply point, the relays are overcurrent relays, but in a network having two supply points the relays are directional overcurrent relays. It is stated that the computer may be connected to the operating elements, adjusting elements and switching elements of the relays by telephone trunk lines, high-voltage carrier frequency, or microwave lines, or laser channels.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1765269A CH503403A (en) | 1969-11-26 | 1969-11-26 | Overcurrent protection device on an electrical network, with staggered tripping times of their protective relays |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1274117A true GB1274117A (en) | 1972-05-10 |
Family
ID=4427055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5529870A Expired GB1274117A (en) | 1969-11-26 | 1970-11-20 | Improvements in or relating to overcurrent or overload protective arrangements having graded operating times |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT301668B (en) |
CH (1) | CH503403A (en) |
DE (1) | DE2049176A1 (en) |
GB (1) | GB1274117A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2341737A (en) * | 1998-09-17 | 2000-03-22 | Alstom Uk Ltd | Fault protection apparatus for use in a time-graded fault protection scheme |
EP1361638A2 (en) * | 2002-05-07 | 2003-11-12 | Alstom | Improved power line protection |
-
1969
- 1969-11-26 CH CH1765269A patent/CH503403A/en not_active IP Right Cessation
-
1970
- 1970-10-07 DE DE19702049176 patent/DE2049176A1/en active Pending
- 1970-10-23 AT AT956970A patent/AT301668B/en not_active IP Right Cessation
- 1970-11-20 GB GB5529870A patent/GB1274117A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2341737A (en) * | 1998-09-17 | 2000-03-22 | Alstom Uk Ltd | Fault protection apparatus for use in a time-graded fault protection scheme |
EP0987807A3 (en) * | 1998-09-17 | 2002-01-23 | Alstom UK Limited | Fault protection apparatus |
US6373670B1 (en) | 1998-09-17 | 2002-04-16 | Alstom Uk Limited | Fault protection apparatus |
GB2341737B (en) * | 1998-09-17 | 2003-03-05 | Alstom Uk Ltd | Fault protection apparatus |
EP1361638A2 (en) * | 2002-05-07 | 2003-11-12 | Alstom | Improved power line protection |
GB2388482A (en) * | 2002-05-07 | 2003-11-12 | Alstom | Power line protection using time-graded relays |
GB2388482B (en) * | 2002-05-07 | 2005-06-15 | Alstom | Improved power line protection |
US7102866B2 (en) | 2002-05-07 | 2006-09-05 | Areva T&D Sa | Power line protection |
CN100401609C (en) * | 2002-05-07 | 2008-07-09 | 阿雷瓦T&D股份有限公司 | Improved power-line protection |
EP1361638A3 (en) * | 2002-05-07 | 2011-07-20 | Areva T&D Sas | Improved power line protection |
Also Published As
Publication number | Publication date |
---|---|
AT301668B (en) | 1972-09-11 |
DE2049176A1 (en) | 1971-06-03 |
CH503403A (en) | 1971-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |