GB2041649A - Improvements in or relating to magnet systems for triggers, for instance in protective fault switches - Google Patents
Improvements in or relating to magnet systems for triggers, for instance in protective fault switches Download PDFInfo
- Publication number
- GB2041649A GB2041649A GB7931550A GB7931550A GB2041649A GB 2041649 A GB2041649 A GB 2041649A GB 7931550 A GB7931550 A GB 7931550A GB 7931550 A GB7931550 A GB 7931550A GB 2041649 A GB2041649 A GB 2041649A
- Authority
- GB
- United Kingdom
- Prior art keywords
- permanent magnet
- yoke body
- magnet
- armature
- yoke
- 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.)
- Granted
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 7
- 238000004804 winding Methods 0.000 claims abstract description 9
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910000828 alnico Inorganic materials 0.000 claims description 2
- -1 aluminium nickel cobalt Chemical compound 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 230000004907 flux Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- 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
- H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
- H01H71/323—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with rotatable armature
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
- Manufacture Of Switches (AREA)
Abstract
A magnet system is provided for a trigger of a protective fault current switch and comprises a yoke body 1 having pole shoes 2,3, winding 4, an armature 5, and a permanent magnet 7. The yoke body 1 forms a magnetic shunt for the permanent magnet 7 and comprises a magnetically soft nickel iron. The permanent magnet 7 comprises a magnetically hard sintered material and is welded to the yoke body 1, for instance by spot welds 8, thus removing the need for any special connecting means. <IMAGE>
Description
SPECIFICATION
Improvements in or relating to magnet systems for triggers, for instance in protective fault current switches
The invention relates to magnet systems for triggers, for instance in protective fault current switches, comprising a yoke body with pole shoes, an armature winding, an armature, and a permanent magnet, with the yoke body forming a magnetic shunt for the permanent magnet.
Such magnet systems are needed in electrical switching apparatus in which switching processes are controlled with very small electrical current. For this purpose an armature is retained in the attracted state by the force of a magnetic holding flux. This holding flux is produced by a permanent magnet which is arranged in the immediate vicinity of the magnetic circuit. The control flux operating as a counter flux is produced by a coil winding which is arranged on one of pole shoes. As soon as the counter flux is greater than the holding flux, the adhesion force of the armature is cancelled so that the armature drops away and thereby triggers a switching process.
Magnet systems of the kind described above are known in many constructional forms. Thus West
German Patent Specification 20 62885 describes a magnet system for holding relays which are adjustabe to a high sensitivity and in which the permanent magnet abuts a soft iron circuit of the magnet system in a rotatable manner.
Also a synthetic resin casing for relays is known in which a bottom plate of the casing contains a
U-shaped yoke which is roatably abutted by the permanent magnet and which consists of magnetically soft iron (West German Patent Specification 20 29 607). For this purpose the bottom plate possesses a cup-shaped recess in which the permanent magnet is inserted together with a spring disc. In this case the spring disc ensures the necessary pressure with which the permanent magnet is pressed against the magnet yoke.
Afurther possibility of the arrangement of a permanent magnet in a trigger resides in that the permanent magnet is securely attached to the magnet yoke. For this it is known already to fix the permanent magnet by means of a rivet between a bentaway magnet limb and a holding plate disposed parallel thereto (West German Offenlegungshrift 25 29 221).
However it has been found that the connections of permanent magnet and magnet yoke known heretofore are disadvantageous in certain cases. Thus, under certain circumstances, it is not necessary at all to dispose a permanent magnet in a rotatable rn nner, in particular as there is always the risk present that the parts are mechanically displaced relatively to each other. This problem cannot be completely excluded even by clamping. Admittedly, fixing the permanent magnet by means of a rivit or similar fixing means imports the advantage of a fixed association of permanent magnet and magnet yoke, but special connection means are necessary in this case.
According to a first aspect of the invention, there is provided a trigger relay for a protective fault current switch, comprising a yoke body having pole shoes, an armature winding, an armature, and a permanent magnet, the yoke body forming a shunt for the permanent magnet and comprising a magnetically soft nickel iron, the permanent magnet comprising a magnetically hard sintered workmaterial, the yoke body and the permanent magnet being welded together.
According to a second aspect of the invention, there is provided a magnet system for a trigger, comprising a yoke body having two pole shoes, an armature winding, an armature, and a permanent magnet, the yoke body forming a magnetic shunt for the permanent magnet, and comprising a magnetically soft nickel iron, the permanent magnet comprising a magnetically hard sintered work material, and the yoke body and the permanent magnet being welded to each other. It is thus possible to produce a magnet system for triggers in which the permanent magnet enters into a fixed connection with the yoke body of a magnet system, without special connecting means being necessary therefor.
Thus, the production of magnet systems is consid erablyfacilitated by the relatively problem-free connection of the yoke body to the permanent magnet, permitting a saving of costs.
Preferably, the yoke body is formed from a sheet of highly permeably nickel iron having a nickel content of at least 50% and the permanent magent comprises an aluminium nickel cobalt alloy.
Preferably, the yoke body and the permanent magnet are connected together by means of impulse or spot welding.
According to a third aspect of the invention, there is provided a method of producing and adjusting a magnet system according to the invention, in which the yoke body and the permanent magnet are connected together at least at one location by spot welding, after which the permanent magnet is re-magnetised and subsequently adjusted to a predefined value by de-magnetising. It is thus possible to adjust the working point of the permanent magnet.
The invention will be further described, by way of example, with reference to the accompanying drawing, which shows a preferred embodiment of the invention.
The Drawing illustrates a magnet system in which a yoke body 1 comprising a magnetically soft nickel iron forms the basic element of the magnet system.
The yoke body has a U-shaped configuration. The limb ends of the yoke body are contructed in the form of pole shoes 2 and 3. The pole shoe 2 carries a coil winding 4. An armature 5 rests on the pole shoes so that, upon lifting off, it performs a rotary movement on the pole shoe 3, the rotary movement being effected by a coil spring 6. A permanent magnet 7 comprising a magnetically hard sintend work material is located underneath the yoke body and provides a holding flux which leaves the armature in its rests position as long as no counter flux is produced in the coil winding 4. The permanent magnet is connected to the yoke body by means of spotlike welds 8.
Claims (7)
1. A trigger relay for a protective fault current switch comprising a yoke body having pole shoes, an armature winding, an armature, and a permanent magnet, the yoke body forming a shunt for a permanent magnet and comprising a magnetically soft nickel iron, the permanent magnet comprising a magnetically hard sintered workmaterial, the yoke body and the permanent magnet being welded together.
2. A magnet system for a trigger, comprising a yoke body having two pole shoes, an armature winding, an armature, and a permanent magnet, the yoke body forming a magnetic shunt for the permanent magnet, and comprising a magnetically soft nickel iron, the permanent magnet comprising a magnetically hard sintered work material, and the yoke body and the permanent magnet being welded to each other.
3. A magnet system as claimed in claim 2, in which the yoke body is formed from a sheet of highly permeable nickel iron having a nickel content of at least 50% and the permanent magnet comprises an aluminium nickel cobalt alloy.
4. A magnet system as claimed in claim 1 or 2, in which the yoke body and the permanent magnet are connected together by means of impulse or spot welding.
5. A magnet system substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
6. A protective fault current switch including a trigger relay as claimed in claim 1 or a magnet system as claimed in any one of claims 2 to 5.
7. A method of producing and adjusting a magnet system as claimed in any one of claims 2 to 5, in which the yoke body and the permenent magnet are connected together at last at one location by spot welding, after which the permanent magnet is re-magnetised and subsequently adjusted to a predefined value by de-magnetising.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792905275 DE2905275A1 (en) | 1979-02-12 | 1979-02-12 | MAGNETIC SYSTEM FOR A TRIGGER, ESPECIALLY IN A FAULT CURRENT CIRCUIT BREAKER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2041649A true GB2041649A (en) | 1980-09-10 |
| GB2041649B GB2041649B (en) | 1983-05-11 |
Family
ID=6062738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7931550A Expired GB2041649B (en) | 1979-02-12 | 1979-09-11 | Magnet systems for triggers for instance in protective fault current switches |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE878698A (en) |
| DE (1) | DE2905275A1 (en) |
| DK (1) | DK39480A (en) |
| ES (1) | ES484504A1 (en) |
| FR (1) | FR2448784A1 (en) |
| GB (1) | GB2041649B (en) |
| IT (1) | IT1123288B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0117250A1 (en) * | 1983-01-20 | 1984-08-29 | Felten & Guilleaume Fabrik elektrischer Apparate Aktiengesellschaft Schrems-Eugenia Niederösterreich | Method of adjusting a trip device with permanent magnet |
| FR2589623A1 (en) * | 1985-10-31 | 1987-05-07 | Itt Composants Instr | ELECTROMAGNETIC RELAY |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4111092A1 (en) * | 1991-04-07 | 1992-10-08 | Schiele Gmbh & Co Kg | Fault current relay |
| ZA936741B (en) * | 1992-09-14 | 1994-04-05 | Circuit Breaker Ind | A shunt trip device |
| DE10036351B4 (en) * | 2000-07-26 | 2007-01-11 | Moeller Gmbh | Tripping device for overload and short-circuit tripping |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1541052A (en) * | 1967-08-11 | 1968-10-04 | Ind Electr De La Seine L | Ultra-sensitive electro-magnetic trip unit |
| DE7042556U (en) * | 1970-11-18 | 1971-04-29 | Siemens Ag | Serving as a trigger electric holding magnet for residual current circuit breakers |
| DE2062885C3 (en) * | 1970-12-21 | 1973-09-13 | Felten & Guilleaume Schaltanlagen Gmbh, 4150 Krefeld | Magnet system for highly sensitive adjustable electrical latching relays |
| DE2365190B2 (en) * | 1973-12-29 | 1978-10-26 | Elmeg-Elektro-Mechanik Gmbh, 3150 Peine | Electromagnet system |
| FR2396403A1 (en) * | 1977-07-01 | 1979-01-26 | Mottet Claude | High current actuated relay - has operating characteristic changes due to presence of current field, prevented by special configuration |
-
1979
- 1979-02-12 DE DE19792905275 patent/DE2905275A1/en not_active Withdrawn
- 1979-09-10 FR FR7922590A patent/FR2448784A1/en not_active Withdrawn
- 1979-09-10 BE BE0/197082A patent/BE878698A/en not_active IP Right Cessation
- 1979-09-11 GB GB7931550A patent/GB2041649B/en not_active Expired
- 1979-09-21 IT IT25932/79A patent/IT1123288B/en active
- 1979-09-27 ES ES484504A patent/ES484504A1/en not_active Expired
-
1980
- 1980-01-30 DK DK39480A patent/DK39480A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0117250A1 (en) * | 1983-01-20 | 1984-08-29 | Felten & Guilleaume Fabrik elektrischer Apparate Aktiengesellschaft Schrems-Eugenia Niederösterreich | Method of adjusting a trip device with permanent magnet |
| AU567123B2 (en) * | 1983-01-20 | 1987-11-12 | Felten & Guilleaume Fabrik Elektrischer Apparate Aktiengesellschaft | Method for adjusting holding magnet release |
| FR2589623A1 (en) * | 1985-10-31 | 1987-05-07 | Itt Composants Instr | ELECTROMAGNETIC RELAY |
| EP0225236A1 (en) * | 1985-10-31 | 1987-06-10 | Itt Industries, Inc. | Electromagnetic relay |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2905275A1 (en) | 1980-08-21 |
| IT1123288B (en) | 1986-04-30 |
| ES484504A1 (en) | 1980-06-16 |
| GB2041649B (en) | 1983-05-11 |
| BE878698A (en) | 1979-12-31 |
| FR2448784A1 (en) | 1980-09-05 |
| DK39480A (en) | 1980-08-13 |
| IT7925932A0 (en) | 1979-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6940376B2 (en) | Electromagnet and actuating mechanism for switch device, using thereof | |
| JP2015511762A (en) | Relay with two oppositely actuable switches | |
| US7889032B2 (en) | Electromagnetic relay | |
| CA2309134A1 (en) | Electromagnetic relay | |
| GB1493751A (en) | Electromagnetic relays | |
| US5017898A (en) | Electromagnetic relay | |
| GB2041649A (en) | Improvements in or relating to magnet systems for triggers, for instance in protective fault switches | |
| US2348556A (en) | Magnet structure | |
| US3715694A (en) | Solenoid switch,particularly cryogenic switch | |
| US2793265A (en) | Methods of and means for effecting magnetic armature actuation | |
| ATE46056T1 (en) | MAGNETIC RELEASE FOR RESIDUAL CURRENT PROTECTION SWITCHES. | |
| GB2193041A (en) | Relay | |
| US3711749A (en) | Reed switch | |
| EP1137032A2 (en) | Magnetic switch | |
| EP0016196B1 (en) | A magnetic latch device for a clapper type contactor | |
| US5155458A (en) | Normally closed AC relay | |
| US2378162A (en) | Electric switch | |
| US666764A (en) | Electric-circuit controller. | |
| JPS5544135A (en) | Hinge spring | |
| MY140375A (en) | A yoke with an integral fixed contact support | |
| EP0786789A3 (en) | Yoke in particular for a trip device usable in a fault current protective switch | |
| US945802A (en) | Stamping and sealing device. | |
| AU6562890A (en) | A trip device for an electric switch | |
| US995255A (en) | Electromagnet. | |
| EP0127309B1 (en) | Monostable type relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |