GB957943A - Improvements in and relating to electric circuit arrangements - Google Patents
Improvements in and relating to electric circuit arrangementsInfo
- Publication number
- GB957943A GB957943A GB1804359A GB1804359A GB957943A GB 957943 A GB957943 A GB 957943A GB 1804359 A GB1804359 A GB 1804359A GB 1804359 A GB1804359 A GB 1804359A GB 957943 A GB957943 A GB 957943A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- connectec
- currents
- series
- unbalance
- 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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
Landscapes
- Rectifiers (AREA)
- Protection Of Static Devices (AREA)
Abstract
957,943. Protective cut-out arrange ments. ENGLISH ELECTRIC CO Ltd. May 27, 1960 [May 27, 1959] No. 18043/59. Heading H2K. An unbalance protective arrange ment for a polyphase system of con ductors 12 ... 14, has for each con ductor a circuit element comprising a resistor 23, 24 or 25 connected in series with the D.C. output circuit o: a full-wave rectifier 20, 21 or 22 whose A.C. input circuit is connectec to a current transformer 17, 18 or 19 the circuit elements being connectec in a closed circuit 26 in which the output E.M.F.'s of the rectifiers act in the same sense around the circuit Circuit means, e.g. a bridge rectifies 40 and the control winding 41a of a magnetic amplifier 41, are connected in parallel with the respective circuit elements and effect the operation of indicating or control means, e.g. a relay 42, in response to " spill " currents from the closed circuit due to current unbalance in the conductors. Substantially constant " standing " currents may be applied to the resistors 23 ... 25 by means of further rectifiers 27 ... 29 supplied by auxiliary transformers 30... 32 which are connected in series with an inductor 33 to an auxiliary A.C. source 34.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1804359A GB957943A (en) | 1959-05-27 | 1959-05-27 | Improvements in and relating to electric circuit arrangements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1804359A GB957943A (en) | 1959-05-27 | 1959-05-27 | Improvements in and relating to electric circuit arrangements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB957943A true GB957943A (en) | 1964-05-13 |
Family
ID=10105666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1804359A Expired GB957943A (en) | 1959-05-27 | 1959-05-27 | Improvements in and relating to electric circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB957943A (en) |
-
1959
- 1959-05-27 GB GB1804359A patent/GB957943A/en not_active Expired
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