GB694785A - Improvements in electrical impedance relays - Google Patents
Improvements in electrical impedance relaysInfo
- Publication number
- GB694785A GB694785A GB1364250A GB1364250A GB694785A GB 694785 A GB694785 A GB 694785A GB 1364250 A GB1364250 A GB 1364250A GB 1364250 A GB1364250 A GB 1364250A GB 694785 A GB694785 A GB 694785A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- impedance
- voltage
- move
- current
- 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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H53/00—Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
- H01H53/01—Details
- H01H53/015—Moving coils; Contact-driving arrangements associated therewith
-
- 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
- H02H3/40—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 ratio of voltage and current
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
694,785. Electromagnetic relays; protective cutout arrangements. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. May 17, 1951 [May 31, 1950], No. 13642/50. Class 38 (v) An impedance relay comprises a movable element 30 carrying two coils 33, 34 energised in accordance with the current and voltage of the "impedance circuit", and acting in opposition to each other in a permanent magnetic field, change of impedance, e.g. owing to a fault causing the element 30 to move and actuate contacts. In the form shown the coils 33 and 34 each move in a radial field between the poles of two pot magnets magnetized by a central member 37. In a modification Fig. 1 (not shown) the two coils lie adjacent each other and there is only one pot magnet. In a further modification, Fig. 5 (not shown) the coil-carrying member is pivoted instead of moving longitudinally. The invention is shown applied to a protective system in which the voltage and current coils are supplied from transformers through fullwave rectifiers, Fig. 2 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1364250A GB694785A (en) | 1950-05-31 | 1950-05-31 | Improvements in electrical impedance relays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1364250A GB694785A (en) | 1950-05-31 | 1950-05-31 | Improvements in electrical impedance relays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB694785A true GB694785A (en) | 1953-07-29 |
Family
ID=10026750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1364250A Expired GB694785A (en) | 1950-05-31 | 1950-05-31 | Improvements in electrical impedance relays |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB694785A (en) |
-
1950
- 1950-05-31 GB GB1364250A patent/GB694785A/en not_active Expired
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