GB1108356A - Improved arrangement for detecting alternating current flow - Google Patents
Improved arrangement for detecting alternating current flowInfo
- Publication number
- GB1108356A GB1108356A GB5037963A GB5037963A GB1108356A GB 1108356 A GB1108356 A GB 1108356A GB 5037963 A GB5037963 A GB 5037963A GB 5037963 A GB5037963 A GB 5037963A GB 1108356 A GB1108356 A GB 1108356A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- secondary winding
- primary winding
- current
- winding
- 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
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
- H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for ac systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
1,108,356. Controlled non-linear inductors. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 7 Jan., 1965 [20 Dec., 1963], No. 50379/63. Heading H3B. [Also in Division H2] An arrangement for detecting alternating current flow, e.g. an earth leakage current, comprises a transformer T1 having a core whose degree of saturation depends on the current to be detected flowing through a first primary winding C 1 , C 2 , a second primary winding A 1 , A 2 , energized by A.C. of a frequency higher than that of the current to be detected, a secondary winding inductively coupled to both primary windings and connected to energize a relay RL when the flux produced by the first primary winding does not saturate the core sufficiently to reduce the inductive coupling between the second primary winding and the secondary winding. The normal higher frequency output of the secondary winding maintains the relay operated until earth leakage occurs when the relay drops out to effect the operation of signalling or control means. The secondary winding may be connected to the relay through a transistorized amplifier 3, a Zener diode 4, an auxiliary transformer T2 and a bridge rectifier 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5037963A GB1108356A (en) | 1963-12-20 | 1963-12-20 | Improved arrangement for detecting alternating current flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5037963A GB1108356A (en) | 1963-12-20 | 1963-12-20 | Improved arrangement for detecting alternating current flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1108356A true GB1108356A (en) | 1968-04-03 |
Family
ID=10455698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5037963A Expired GB1108356A (en) | 1963-12-20 | 1963-12-20 | Improved arrangement for detecting alternating current flow |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1108356A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2555302A1 (en) * | 1975-12-09 | 1977-06-23 | Bbc Brown Boveri & Cie | Fault current protection circuit - has summator transformer, amplifier for fault signal and triggering relay override |
| DE2555303A1 (en) * | 1975-12-09 | 1977-06-23 | Bbc Brown Boveri & Cie | Fault current protective circuit - has summator transformer and has auxiliary windings feeding biasing generator and RC control |
-
1963
- 1963-12-20 GB GB5037963A patent/GB1108356A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2555302A1 (en) * | 1975-12-09 | 1977-06-23 | Bbc Brown Boveri & Cie | Fault current protection circuit - has summator transformer, amplifier for fault signal and triggering relay override |
| DE2555303A1 (en) * | 1975-12-09 | 1977-06-23 | Bbc Brown Boveri & Cie | Fault current protective circuit - has summator transformer and has auxiliary windings feeding biasing generator and RC control |
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