GB877969A - Improvements in or relating to electric switchgear associated with zoned protection - Google Patents
Improvements in or relating to electric switchgear associated with zoned protectionInfo
- Publication number
- GB877969A GB877969A GB3495056A GB3495056A GB877969A GB 877969 A GB877969 A GB 877969A GB 3495056 A GB3495056 A GB 3495056A GB 3495056 A GB3495056 A GB 3495056A GB 877969 A GB877969 A GB 877969A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- conductor
- breaker
- current transformers
- protective
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—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 for distribution gear, e.g. bus-bar systems; for switching devices for switches
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
877,969. Protective cut-out arrangements. REYROLLE & CO. Ltd., A. (State Electricity Commission of Victoria). Feb. 7, 1958 [Nov. 15, 1956; Nov. 16, 1956], Nos. 34950/56 and 35076/56. Class 38 (5). In a protective arrangement suitable for outdoor type switchgear, the conductor between a current transformer, which ends a protective zone, and a circuit-breaker, which ends the corresponding sector of the system, is screened from earth by means connected to the main circuit at a point on the side of the current transformer remote from the circuit-breaker. In Figs. 1 and 2 one protection zone has current transformers D<SP>1</SP>, E<SP>2</SP>, and another zone has current transformers F<SP>3</SP>, D<SP>2</SP>. The top casing D<SP>3</SP> of the current transformer unit D and the screen G associated with the conductor C<SP>4</SP> are connected to the main conductor C<SP>1</SP> so that any fault between G and earth, or between the screens G of different phases, operates the protective circuit between current transformers D<SP>1</SP>, E<SP>2</SP> only and circuit-breakers F<SP>1</SP> are not tripped. A current transformer with its screened conductor may be arranged on each side of the circuit-breaker (Fig. 3, not shown) or a transformer arrangement as in Fig. 1 may be used with two circuit-breakers in series (Figs. 4 and 5, not shown). In Fig. 7 the screen is in the form of a shroud M which is connected to the lower casing B<SP>1</SP> of the circuit-breaker and the conductor C<SP>4</SP> is insulated therefrom. A voltage transformer may be connected to the casing B<SP>1</SP> with this arrangement and it will be within the protection zone of the conductor C<SP>1</SP> (Fig. 6, not shown). A screen O between the breaker mechanism and conductors may be connected to the casing B<SP>1</SP> or (Fig. 8, not shown) separately connected to a conductor leading to a point on the main circuit between the current transformers D<SP>1</SP>, D<SP>2</SP>. With the latter arrangement a fault between the screen O and earth will operate the protective equipment of both zones. In Fig. 10 (not shown) the current transformers are mounted between two series circuit-breakers with the shrouds for the conductors on each side, and the lower breaker casings all connected to a point between the two current transformers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3495056A GB877969A (en) | 1956-11-15 | 1956-11-15 | Improvements in or relating to electric switchgear associated with zoned protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3495056A GB877969A (en) | 1956-11-15 | 1956-11-15 | Improvements in or relating to electric switchgear associated with zoned protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB877969A true GB877969A (en) | 1961-09-20 |
Family
ID=10371986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3495056A Expired GB877969A (en) | 1956-11-15 | 1956-11-15 | Improvements in or relating to electric switchgear associated with zoned protection |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB877969A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116884771A (en) * | 2023-09-05 | 2023-10-13 | 中宝电气有限公司 | Circuit breaker capacitor electricity taking assembly |
-
1956
- 1956-11-15 GB GB3495056A patent/GB877969A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116884771A (en) * | 2023-09-05 | 2023-10-13 | 中宝电气有限公司 | Circuit breaker capacitor electricity taking assembly |
| CN116884771B (en) * | 2023-09-05 | 2023-12-01 | 中宝电气有限公司 | Circuit breaker capacitor electricity taking assembly |
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