GB801272A - Improvements in or relating to phase sequence filters - Google Patents
Improvements in or relating to phase sequence filtersInfo
- Publication number
- GB801272A GB801272A GB1842154A GB1842154A GB801272A GB 801272 A GB801272 A GB 801272A GB 1842154 A GB1842154 A GB 1842154A GB 1842154 A GB1842154 A GB 1842154A GB 801272 A GB801272 A GB 801272A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impedance
- current
- secondary windings
- arms
- impedance arms
- 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
- H02H3/343—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 using phase sequence analysers
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
801,272. Protective cut-out arrangements. GENERAL ELECTRIC CO., Ltd. June 22, 1955 [June 23, 1954], No. 18421/54. Class 38 (5). A phase sequence network for use with a three-phase system comprises a pair of seriallyconnected impedance arms R, P of substantially equal absolute impedance value and having impedance phase angles differing by substantially 60 degrees, means for supplying current to the impedance arms constituted by three current transformers AT, BT, CT, and a single 1: 1 ratio transformer T having primary and secondary windings TP, TS associated respectively with the two impedance arms and connected with the current transformers in such a manner that the impedance arms are each arranged to be supplied with current dependent on the difference between the currents passing through the secondary windings of two of the current transformers, and a detector D linked with the impedance arms to give an indication of the presence of either negative or positive phase components. Fig. 1 (Provisional) shows an arrangement in which the current transformer secondary windings, with that CT reversed, are star connected and the impedance arms R, P comprise a resistor R and a parallely-connected inductance-resistor combination r, x. Alternatively the arm P may comprise a seriallyconnected inductance-resistor combination. In Fig. 1 (Complete) the current transformer secondary windings are connected in delta, the circuit connections being suitably modified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1842154A GB801272A (en) | 1954-06-23 | 1954-06-23 | Improvements in or relating to phase sequence filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1842154A GB801272A (en) | 1954-06-23 | 1954-06-23 | Improvements in or relating to phase sequence filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB801272A true GB801272A (en) | 1958-09-10 |
Family
ID=10112147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1842154A Expired GB801272A (en) | 1954-06-23 | 1954-06-23 | Improvements in or relating to phase sequence filters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB801272A (en) |
-
1954
- 1954-06-23 GB GB1842154A patent/GB801272A/en not_active Expired
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