GB744668A - Improvements in electro-magnetic control devices - Google Patents
Improvements in electro-magnetic control devicesInfo
- Publication number
- GB744668A GB744668A GB30091/52A GB3009152A GB744668A GB 744668 A GB744668 A GB 744668A GB 30091/52 A GB30091/52 A GB 30091/52A GB 3009152 A GB3009152 A GB 3009152A GB 744668 A GB744668 A GB 744668A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pole pieces
- winding
- armature
- electromagnets
- energized
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/32—Electromagnetic mechanisms having permanently magnetised part
Abstract
744,668. Electrically-released switches, protective cut-out arrangements. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 5, 1953 [Nov. 27, 1952], No. 30091/52. Class 38(5) An electromagnet operating device for an N phase circuit protective or indicating device comprises N electromagnets 1...3 providing N pairs o: pole pieces with all the pole pieces extending intc parallel juxtaposed relationship to one another and co-operating with a common armature 4, means for pre-magnetizing the electromagnets so that the pole pieces become of alternate opposite polarity and attract the armature against a bias 8 and an alternating-current control winding 9 embracing the pole pieces, the control winding when energized deflecting the flux entering the armature from the pole pieces to cause the release of the armature. The winding 9 may be energized in accordance with the unbalance current of the circuit with which the device is associated and the release of the armature may effect the operation of an indicating device or of contacts 12, as shown. The electromagnets 1...3 may be pre-magnetized by a permanent magnet or a winding 6 connected to a D.C. source. The core of each electromagnet may be made in two halves, each half core-being formed by parts 13, 14 providing a pole piece 15 and an air gap 16. The two halves, e.g. 1, 1', of each core are assembled so that the air gaps 16 appear on opposite sides of the pole pieces 15 and the pole pieces assume opposite polarities when the common winding 6 is energized. The half cores are separated from one another by magnetic spacers to allow for the introduction of the winding 9 which may be formed as a single conductor which weaves in and out between successive pole pieces. Specifications 731,919, 742,114, and 744,474 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB319388X | 1952-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB744668A true GB744668A (en) | 1956-02-15 |
Family
ID=10330631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30091/52A Expired GB744668A (en) | 1952-11-27 | 1952-11-27 | Improvements in electro-magnetic control devices |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH319388A (en) |
| GB (1) | GB744668A (en) |
-
1952
- 1952-11-27 GB GB30091/52A patent/GB744668A/en not_active Expired
-
1953
- 1953-11-25 CH CH319388D patent/CH319388A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH319388A (en) | 1957-02-15 |
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