EP2606500A1 - A plate and an electromagnetic contactor comprising the plate for reinforcing a movable contact of the electromagnetic contactor during switching operation. - Google Patents
A plate and an electromagnetic contactor comprising the plate for reinforcing a movable contact of the electromagnetic contactor during switching operation.Info
- Publication number
- EP2606500A1 EP2606500A1 EP10765781.9A EP10765781A EP2606500A1 EP 2606500 A1 EP2606500 A1 EP 2606500A1 EP 10765781 A EP10765781 A EP 10765781A EP 2606500 A1 EP2606500 A1 EP 2606500A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- location
- flat portion
- movable contact
- damping spring
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
Definitions
- a plate and an electromagnetic contactor comprising the plate for reinforcing a movable contact of the electromagnetic contactor during switching operation.
- An electromagnetic contactor of an electromagnetic switching device has a movable contact which is typically used for controlling flow of electrical current in an electrical circuit.
- the electromagnetic switching device is controllable for switching between on and off states for closing and breaking a power supply circuit.
- magnets may be employed to actuate the electromagnetic contactor for
- movable contact of the electromagnetic contactor is moved to engagement with fixed contacts for closing the power supply circuit.
- the fixed contact is electrically connected to the power supply.
- the power supply circuit is closed when movable contact is in engagement with the fixed contact under contact pressure.
- the power supply circuit is opened.
- an electric arc is generated. Due to the electric arc, immense heat is generated which further heats the movable contact.
- the movable contact also heats up due to carrying of current for long times when the device is in closed condition.
- Heating up of the movable contact in either way de-shapes the movable contact which is under high contact pressure & switching impacts due to electromagnetic force during switching operation.
- One possible way to protect the movable contact from de- shaping is by providing reinforcing mechanism over the movable contact, so that the movable contact can withstand heat without de-shaping.
- Electric arc impact on the ends of the movable contacts can be reduced by providing an arc runner adjacent to the ends of the movable contact which help to disengage the movable contact from the fixed contact quickly to lessen the wearing off of the ends of the movable contacts.
- additional elements & features i.e., reinforcing element, arc runner and feature for locating damping spring are provided, which in turn increases cost and step of
- An object of the invention is to provide the electromagnetic contactor which can be manufactured easily and cost- effectively.
- a plate is used for reinforcing a movable contact of an electromagnetic contactor during switching operation, wherein the plate includes a flat portion having a location on which a damping spring is placed, a location support adapted to be coupled to the damping spring for preventing the damping spring from dislodging from the location, and an arc runner for directing a switching arc produced during switching operation away from the movable contact, such that, the flat portion, location support and arc runner are coupled together to form the plate.
- Such plate helps to reduce number of elements for protecting the movable contact from de-shaping, wearing off and dislocation, thus, providing the electromagnetic
- the plate includes a first side to circumferentially wrap a part of the movable contact, and a second side for locating the damping spring on the location over the flat portion and preventing the damping spring from dislodging from the location through location support.
- the flat portion, the location support and the arc runner are detachably coupled. This helps to provide the plate where the elements, i.e., the flat portion, the location support and the arc runner can be replaced easily when any of the elements is destroyed.
- the flat portion is coupled to the location support and the location support is coupled to the arc runner.
- each of the flat portion, the location support and the arc runner can function effectively to protect the plate.
- the arc runner is adapted for directing the switching arc away from the silver button. This helps to protect silver button from wearing off due to the switching arc, thus saving cost of replacement of silver buttons which are costly due to high cost of silver meta1.
- the location support comprises elevation at opposite ends of the flat portion to form a groove to place the damping spring inside the grove on a location over the flat portion. This provides a simple way to provide the location support for holding the damping spring .
- the plate is provided as a part of the electromagnetic contactor. This helps to reduce over all steps for manufacturing the electromagnetic contactor and makes the electromagnetic conductor manufacturing cost- effective .
- FIG 1 shows a front end view of a plate used for reinforcing a contact of an electromagnetic contactor during switching operation .
- FIG 2 shows a front end view of the electromagnetic contactor with the plate.
- a plate 1 for reinforcing a movable contact of an electromagnetic contactor during switching operation the plate 1 includes a flat portion 3 having a location 7 on which a damping spring 6 is adapted to be placed, a location support 4 adapted to be coupled to a damping spring for preventing the damping spring from
- an arc runner 5 for directing a switching arc produced during switching operation away from the movable contact, in a way that the flat portion 3, the location support 4, the arc runner 5 are coupled together to form the plate 1.
- the coupling between the flat portion 3, the location support 4 and the arc runner 5 is such that, the flat portion 3 is coupled to the location support 4 by placing the flat portion
- the flat portion 3 can be coupled to the arc runner 5 and the arc runner 5 is coupled to the location support 4.
- the flat portion 3, the location support 4, the arc runner 5 are coupled together by permanent fixture with the help of wielding, or permanent adhesives. Alternatively the
- the plate 1 also includes a first side 8 to circumferentially wrap a part of the movable contact, and a second side 9 for locating the damping spring on the location 7 over the flat portion 3 and preventing the damping spring from dislodging from the location 7 through location support 4.
- the flat portion 3 provides the location 7 for placing the damping spring along a contact of the damping spring.
- the flat portion 3 is having an even geometry with smooth finish, so that the damping spring can remain structurally coupled to be located on the location 7 for damping of vibrations or shocks during witching operation.
- the flat surface 3 can have geometry complimenting a structure of the contact of the damping spring, so as to provide a strong structural coupling for keeping the damping spring away from possibility of dislocation during switching operations.
- the location support 4 includes elevation 11 at opposite ends 12 of the flat portion 3 to form a groove to place the damping spring inside the grove on the location 7 over the flat portion 3.
- location support 4 can have any other geometry like grooves, velcros, etc, so that the damping spring remain intact with the plate while switching operation to withstand vibrations and shocks.
- location 7 and the location support 4 can be combined together to provide the surface to engage with the plate 1 and also to provide a support, so that the damping string remains engaged with strong structural coupling for keeping the damping spring away from possibility of dislocation during switching
- the arc runner 5 is structurally coupled to the location support 4, in a way, so that when the location support 4 ends along the plate 1, the arc runner 5 begins and extends further to be coupled to the movable contact for protecting the movable contact from electric arc generated during the switching operation.
- the arc runner couples functionally to an arc extinguishing chamber for quenching the electric arc generated during switching operation when the movable contact is moved away from the fixed contact.
- FIG 2 a front end view of the electromagnetic contactor 13 with a plate 1 is illustrated, wherein the plate 1, the damping spring 6 and the movable contact 2 are coupled together to form the electromagnetic contactor 13.
- the structural coupling between the movable contact 2 and the plate 1 is provided by placing the plate 1 over the movable contact 2 at the first side 2 of the plate 1, so as to circumferentially wrap a part of the movable contact 2. While the structural coupling between the plate 1 and the damping spring 6 is provided by placing the damping spring 6 along a second side of the plate 1 on a location 7 over a flat portion 3, and by engaging the damping spring 6 to a location support 4 along the second side for preventing the damping spring 6 from dislodging from the location 7 through location support 4. The damping spring 6 is engaged to the location support 4 of the plate 1 through grooves formed by elevations 11 at opposite ends 12 of the flat portion 3by placing the damping spring 6 inside the grove on the location 7 over the flat portion 3.
- the movable contact 2 is made of copper metal and having a silver button 10 to enhance electrical conductivity of the movable contact 2, so that whenever the movable contact 2 establishes an electrical connection with a fixed contact, the connection is made through the silver button 10.
- the movable contact 2 need not include silver button 10, rather the movable contact 2 can make electrical connection with the fixed contact by establishing a physical contact with the fixed contact.
- the silver button de-shapes and wears off due to high temperature of electric arc
- the arc runner 5 of the plate 1 extends up to the silver button 2.
- the silver button 10 is affixed to the movable contact 2 through a permanent fixture by wielding or gluing
- the silver button 10 can also be affixed temporarily through threading, velcros or any such temporary fixture arrangement, which can bear the stress and heat during the switching operation.
- the electrical conductivity of the movable contact 2 can be increased by replacing the silver button 10 by any other metal which is having high electrical conductivity such as gold, etc.
- the electrical conductivity of the movable contact 2 can also be increased by combining high electrical conductivity metal to form the movable contact 2 by way of fusingly mixing the metals, or superimposing higher conductivity metal layer on the movable contact 2, etc.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2010/064910 WO2012045339A1 (en) | 2010-10-06 | 2010-10-06 | A plate and an electromagnetic contactor comprising the plate for reinforcing a movable contact of the electromagnetic contactor during switching operation. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2606500A1 true EP2606500A1 (en) | 2013-06-26 |
EP2606500B1 EP2606500B1 (en) | 2015-12-02 |
Family
ID=44009889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10765781.9A Not-in-force EP2606500B1 (en) | 2010-10-06 | 2010-10-06 | A plate and an electromagnetic contactor comprising the plate for reinforcing a movable contact of the electromagnetic contactor during switching operation. |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2606500B1 (en) |
KR (1) | KR101557767B1 (en) |
CN (1) | CN103155070B (en) |
BR (1) | BR112013008203B1 (en) |
WO (1) | WO2012045339A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1175776B (en) * | 1962-01-31 | 1964-08-13 | Siemens Ag | Contact bridge for electrical switchgear |
DE2161616C2 (en) * | 1971-12-11 | 1973-12-20 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Tub-shaped contact bridge |
DE2647888C3 (en) * | 1976-10-22 | 1984-08-30 | Siemens AG, 1000 Berlin und 8000 München | Tub-shaped contact bridge |
DE2718975C3 (en) * | 1977-04-28 | 1981-11-26 | SIEMENS AG AAAAA, 1000 Berlin und 8000 München | Method for producing a contact bridge |
-
2010
- 2010-10-06 CN CN201080069499.1A patent/CN103155070B/en not_active Expired - Fee Related
- 2010-10-06 WO PCT/EP2010/064910 patent/WO2012045339A1/en active Application Filing
- 2010-10-06 BR BR112013008203A patent/BR112013008203B1/en not_active IP Right Cessation
- 2010-10-06 EP EP10765781.9A patent/EP2606500B1/en not_active Not-in-force
- 2010-10-06 KR KR1020137011728A patent/KR101557767B1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2012045339A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012045339A1 (en) | 2012-04-12 |
BR112013008203B1 (en) | 2020-01-14 |
KR20130141513A (en) | 2013-12-26 |
CN103155070A (en) | 2013-06-12 |
BR112013008203A2 (en) | 2016-06-21 |
EP2606500B1 (en) | 2015-12-02 |
CN103155070B (en) | 2016-01-20 |
KR101557767B1 (en) | 2015-10-06 |
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