GB172731A - Improvements in and relating to electric power distribution systems - Google Patents
Improvements in and relating to electric power distribution systemsInfo
- Publication number
- GB172731A GB172731A GB2634720A GB2634720A GB172731A GB 172731 A GB172731 A GB 172731A GB 2634720 A GB2634720 A GB 2634720A GB 2634720 A GB2634720 A GB 2634720A GB 172731 A GB172731 A GB 172731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cable
- earth
- cables
- transformers
- switches
- 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
- H02H7/266—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 involving switching on a spare supply
Landscapes
- Locating Faults (AREA)
Abstract
172,731. British Thomson - Houston Co., Ltd., and Trencham, H. Sept. 14, 1920. Protective arrangements.-In a power distribution system a spare cable is laid additional to the supply cables and of the same capacity as each of them, the space cable serving while the system is sound as a pilot wire in a Merz-Price type of protective system, and on fault to earth as a substitute cable which by means of switch devices replaces the faulty cable which in turn serves as the pilot wire. In the three-phase arrangement shown, employing lead-sheathed cables, the main cables 1, 2, 3 are provided with isolating switches 12 and change-over switches 13 which enable the spare cable 4 by means of its switch 13 to be substituted for any of the main cables and the faultv cable isolated. Current transformers 5 are arranged at each end of the system and connected as shown. To ensure that only faults within the section protected will operate the switches, the transformer group at one end is connected to that at the other through relays 9 by means of the spare cable, the return circuit being through earth. In the case of feeders where it is possible for faults to occur between phases, two additional transformers are arranged at each end with their secondaries connected in series and with the secondary systems of the earth fault protection transformers. The improvements are applicable also to single-phase and two-phase systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2634720A GB172731A (en) | 1920-09-14 | 1920-09-14 | Improvements in and relating to electric power distribution systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2634720A GB172731A (en) | 1920-09-14 | 1920-09-14 | Improvements in and relating to electric power distribution systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB172731A true GB172731A (en) | 1921-12-14 |
Family
ID=10242237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2634720A Expired GB172731A (en) | 1920-09-14 | 1920-09-14 | Improvements in and relating to electric power distribution systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB172731A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011405A (en) * | 2019-04-26 | 2019-07-12 | 中国长江电力股份有限公司 | A kind of realization device of the spare phase selection of " 3+1 " submarine cable from throwing |
| CN114400628A (en) * | 2021-12-20 | 2022-04-26 | 广西润电风能(北流)有限公司 | Wind power plant current collection circuit control method capable of reducing fault influence range |
-
1920
- 1920-09-14 GB GB2634720A patent/GB172731A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011405A (en) * | 2019-04-26 | 2019-07-12 | 中国长江电力股份有限公司 | A kind of realization device of the spare phase selection of " 3+1 " submarine cable from throwing |
| CN114400628A (en) * | 2021-12-20 | 2022-04-26 | 广西润电风能(北流)有限公司 | Wind power plant current collection circuit control method capable of reducing fault influence range |
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