EP2819135A1 - Elektrischer Schaltschütz und Verfahren zur Steuerung eines solchen Schaltschützes - Google Patents
Elektrischer Schaltschütz und Verfahren zur Steuerung eines solchen Schaltschützes Download PDFInfo
- Publication number
- EP2819135A1 EP2819135A1 EP14173615.7A EP14173615A EP2819135A1 EP 2819135 A1 EP2819135 A1 EP 2819135A1 EP 14173615 A EP14173615 A EP 14173615A EP 2819135 A1 EP2819135 A1 EP 2819135A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- movable contact
- contact
- movable
- contacts
- open position
- 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
- 238000000034 method Methods 0.000 title claims description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 38
- 238000010891 electric arc Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 8
- 238000010616 electrical installation Methods 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/546—Contact arrangements for contactors having bridging contacts
-
- 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
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
-
- 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
- H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
Definitions
- the present invention relates to an electric contactor, as well as a method of controlling such a contactor.
- An electrical contactor comprises at least one pair of fixed contacts, and for each pair of fixed contacts, a movable contact between a closed position and an open position. More specifically, the fixed contacts are electrically connected to each other, when the movable contact is in the closed position, and electrically isolated from each other, when the movable contact is in the open position.
- a persistent issue in the field of electrical contactors is to operate the contactor optimally for a DC application, that is to say to propose a contactor architecture whose operation is optimized when traversed by a direct current and in a transitional period of opening.
- the transitional opening period corresponds to a period when at least one movable contact is being moved between the open position and the closed position.
- the object of the invention is therefore to provide an electrical contactor which, when traversed by a DC current, during the transitional period of opening, has a better thermal operation and improves the opening of its movable contacts.
- the contactor comprises in the same housing the first or second switches and switches, while after receiving an order to open the contactor by the control device, the control device is clean to controlling the displacement of the or each first movable contact in the open position before that of each second movable contact in the open position, with a time offset of between 10 milliseconds (ms) and 1 second (s) between the displacement of the first movable contact (s) and moving the second moving contacts, preferably between 50 ms and 500 ms, more preferably between 50 ms and 100 ms, and when the or each first movable contact is in the closed position, the second switches are connected in parallel, while when the or each first movable contact is in the open position, the second switches are connected in series
- the offset opening of the or each first movable contact relative to the second movable contact in the transitional period of opening, that is to say just after receipt of the opening order , to have optimized thermal operation, as well as to ensure the opening of the first (s) and second (s) movable contacts.
- the contactor 10 comprises a housing 11 which surrounds all the elements included in the contactor 10.
- the contactor 10 comprises a first switch 12 and three second switches 14.
- the first switch 12 is connected in parallel with the three second switches 14, and the three second switches 14 are connected in series.
- the contactor 10 comprises a first contact holder 16 associated with the first switch 12 and a second contact holder 17 associated with the second switches 14.
- the contactor 10 also comprises a device 20 for controlling the contact carriers 16, 17 and a member 22 for supplying electrical power to the control device 20.
- the contactor 10 comprises a current input terminal E1 and a current output terminal S1.
- the input terminal E1 and the output terminal S1 are adapted to be connected to an electrical installation, not shown, equipped with the contactor 10.
- the first switch 12 comprises a pair of first fixed contacts 24 and a first contact 26 movable between a closed position and an open position.
- the first fixed contacts 24 are, in the closed position of the first movable contact 26, electrically connected to each other via the first movable contact 26, and in the open position of the first movable contact 26, electrically isolated from each other. To the figure 1 the first movable contact 26 is in the open position.
- Each second switch 14 comprises a pair of second fixed contacts 28 and a second contact 30 movable between a closed position and an open position.
- the second fixed contacts 28 are, in the closed position of each second movable contact 30, electrically connected to each other via each second movable contact 30, and are, in the open position of each second movable contact 30, electrically isolated from each other .
- each second movable contact 30 is in the open position.
- the first contact carrier 16 is adapted to hold each first movable contact 26.
- Each first movable contact 26 is for example fixed integrally to the first contact carrier 16, so that the displacement of the first contact port 16 automatically causes the displacement of each first moving contact 26.
- the second contact carrier 17 is able to hold each second movable contact 30.
- Each second movable contact 30 is for example fixed integrally to the second contact carrier 17, so that the displacement of the second contact port 17 automatically causes the displacement of each second moving contact 30.
- the control device 20 comprises a first member 32 for controlling the first contact holder 16 and a second member 34 for controlling the second contact holder 17.
- the control device 20 also comprises a member 36 for synchronizing the first and second control members. control 32, 34.
- the control device 20 is able to control the displacement of the first 16 and the second 17 door-contacts for opening or closing the first movable contact 26 and the second movable contacts 30, that is to say for the opening or closing the first switch 12 and respectively each second switch 14.
- Each first movable contact 26 and each first fixed contact 24 are dimensioned so that their heating at nominal operating current, that is to say at nominal operating current of the electrical installation, is less than a normative value. For example, for a nominal operating current of 65 amps the heating of each first movable contact 26 and each first fixed contact 24 is less than 65 ° Celsius. Normally, the temperature is measured at the terminals E1, S1 respectively of current input and current output.
- Each second movable contact 30 and each second fixed contact 28 are dimensioned so as to have a minimum deterioration at the appearance of an electric arc, upon the opening of each second movable contact 30.
- the second switches 14 are intended, at the opening of their second movable contact 30, to see an electric arc to be formed between the second movable contacts 30 and fixed 28 respectively.
- the first control member 32 and the second control member 34 respectively comprise a first control coil 38 and a second control coil 40.
- the synchronizing member 36 is clean, during the opening of the first movable contact 26, measuring a current I through the first control coil 38.
- the synchronizing member 36 is adapted to control the opening of the second movable contacts 30, via the second control member 34, as a function of the value of the current I.
- the first coil 38 and the second coil 40 are able to control the displacement of the first contact carrier 16 and respectively of the second contact carrier 17, for the opening or closing of the first movable contact 26 and the second movable contacts 30 respectively.
- the input terminal E1 and the output terminal S1 are electrically connected to one another, and the first switch 12 is connected in parallel with the second switches 14, themselves connected in series.
- the control device 20 controls, using the first control member 32 and the second control member 34 and the first coil 38 and the second coil 40, moving the first movable contact 26 in the open position before controlling the displacement of each second movable contact 30 in the open position. More specifically, the opening is made with a time shift between, on the one hand, the first movable contact 26, and secondly, the second movable contacts 30.
- the time offset between the displacement of the first movable contact 26 in position open and the displacement of the second moving contacts 30 in the open position is between 50 milliseconds (ms) and 1 second, preferably between 100 ms and 500 ms, more preferably between 100 ms and 200 ms.
- the synchronizing member 36 After receiving the opening command, the synchronizing member 36 measures the current I flowing in the first coil 38, the first coil 38 comprising, for example, a movable magnetic core, not shown, which causes the movement of the first When this movable core moves, the first contact carrier 16 is moved to cause the opening of the first movable contact 26, and the mobile magnetic core consumes current. Thus, the current I which passes through the first coil 38 and is measured by the synchronization block 36 increases. Then, when the first movable contact 26 is in the open position, the mobile core stops and no longer consumes current. Thus, the current I through the coil 38 is stable, and the first contact carrier 16 has traveled its entire opening race.
- the first coil 38 comprising, for example, a movable magnetic core, not shown, which causes the movement of the first
- the first contact carrier 16 is moved to cause the opening of the first movable contact 26, and the mobile magnetic core consumes current.
- the current I which passes through the first coil 38 and is measured by the synchronization block 36 increases.
- the synchronization block 36 detects that the current flowing through the first coil 20 no longer increases or has reached a predetermined value, it controls via the second control member 34 and the second coil 40 the opening of each second movable contact 30, the second movable contacts 30 being displaced in the open position almost simultaneously, since they are all held together by the second contact holder 17.
- the opening offset in time of the first movable contact 26 and the second movable contacts 30 is performed as a function of the value of the current I.
- the contactor 100 comprises a housing 102 which includes all the elements included in the contactor 100.
- the switch 100 comprises two first switches 104 and three second switches 106.
- the switch 100 also comprises a contact carrier 108 and two shafts, not shown, along which the contact carrier 108 is adapted to translate.
- the contactor 100 comprises a current input terminal E2 and a current output terminal S2.
- Each first switch 104 comprises a pair of first fixed contacts 110 and a first contact 112 movable between a closed position and an open position.
- each second switch 106 comprises a pair of second fixed contacts 114 and a second contact 116 movable between a closed position and an open position.
- the contact carrier 108 is able to hold the first movable contacts 112 and the second movable contacts 116.
- the contact carrier 108 is movable in translation along the shafts, in order to move the first movable contacts 112 and the second contacts. movable 116 in the open or closed position.
- the first fixed contacts 110 are, for example, each in the form of a pellet 115, each pellet 115 being secured to a corresponding first mobile bridge 117, and oriented towards a lower inner face 118 of the housing 102.
- Each first movable contact 112 comprises two first contact pads 119 integral with a second movable bridge 120 and connected by this second movable bridge 120. Each first movable contact 112 is connected to the contact carrier 108 via a first spring 121.
- the second fixed contacts 114 are, for example, each in the form of a pellet 122, each pellet 122 being secured to a corresponding fixed bridge 123.
- Each second movable contact 116 comprises two second contact pads 124 secured to the first movable bridge 117 and connected by this first movable bridge 117. These second pads 124 are oriented towards an upper inner face 125 of the housing 102. Each second movable contact 116 is connected. to the contact carrier 108 via a second spring 126.
- the first, respectively second, fixed contacts 110 and 114 are, in the closed position of the first 112, respectively second 116 movable contact, interconnected via the first 112, respectively second 116 movable contact, and are electrically isolated from one of the other, in the open position of the first 112, respectively second 116 movable contact.
- the contact holder 108 In the open position of the first 112 and second 116 movable contacts, the contact holder 108 is in the lower position, for example in abutment against the lower inner face 118.
- the contact carrier 108 In the closed position of the first 112 and second 116 movable contacts, the contact carrier 108 is in the high position, for example in abutment against the upper internal face 125.
- all the contacts 110, 112, 114, 116 are dimensioned so that their heating at the nominal operating current of the electrical installation is less than the normative values. For example, for a nominal operating current of 65 amps the heating of all contacts 110, 112, 114 and 116 is less than 65 ° Celsius.
- the second movable contacts 116 and the second fixed contacts 114 are dimensioned in order to have a minimum deterioration at the appearance of an electric arc, upon the opening of each second movable contact 116. Indeed, the second switches 106 are intended, when opening their second movable contact 116, to see an electric arc is formed between the second movable contacts 116 and the second fixed contacts 114.
- a control device is able to control the displacement of the contact holder 108 for the opening or closing of the first 104 and second 106 switches, that is to say to control the movement of each first movable contact 112 and each second movable contact 116.
- Each first spring 121 is capable of exerting a first thrust force P1 on each first movable contact 112.
- Each second spring 126 is capable of exerting a second thrust force P2 on each second movable contact 116, which is greater than the first thrust force P1.
- the contactor 100 has a generally staggered structure with the first switches 104 located below the second switches 106 with respect to the upper face 125.
- the first switches 104 and the second switches 106 are in closed position.
- the second movable contacts 116 are connected in parallel via the first switches 104, the fixed bridges 123 and the second fixed contacts 114.
- the connection of the fixed bridges 123 which connects fixed contacts 114 belonging to different second switches 106, and the connection of the first switches 104 to the second switches 106, via the first fixed contacts 110 makes it possible to connect in parallel the second switches 106, and more particularly the second movable contacts 116 and their first movable bridges 117.
- the input terminal E2 and the output terminal S2 are then connected to each other.
- the control device After receiving an order to open the contactor 100 by the control device, not shown, when the contactor 100 is in the configuration of the figure 3 , the control device controls the displacement of the contact holder 108 towards the lower inner face 118.
- the equivalent electrical diagram of the contactor 100 shown in FIG. figure 6 illustrates the feature that according to the open or closed position of the first movable contacts 112, the second switches 106 are connected in parallel or in series.
- the second switches 106 are connected in parallel, and when the first movable contacts 112 are in the open position, the second switches 106 are connected in series.
- the contact holder 108 continues its displacement which causes the displacement of the second movable contacts 116, these remaining nevertheless in the closed position, because the thrust force P2 exerted by the second spring 126 is sufficient to hold them in position closed.
- the second thrust force P2 is canceled, because compensated by the displacement of the contact carrier 108 which, during its displacement, exerts a force to move the second movable contacts 116 in a direction opposite to that of the second thrust force P2.
- the second thrust force P2 becomes insufficient to keep the second movable contacts 116 in the closed position, which then separate from the second fixed contacts 114. Indeed, once the second thrust force P2 is compensated for, by the displacement of the carrier 108, each movable contact 116 moves towards the lower face 118 and is separated from the fixed contacts 114.
- each first switch 104 and each second switch 106 are in the open position.
- each first movable contact 112 is, when an electrical fault occurs, moved in the open position with a time offset relative to the displacement of each second movable contact 116. More specifically, each first movable contact 112 is moved to the open position before each second movable contact 116 is moved to the open position.
- the time difference between the displacement of the first movable contacts 112 in the open position and the displacement of the second movable contacts 116 in the open position is between 10 ms and 1 s, preferably between 50 ms and 500 ms, more preferably between 50 ms and 100 ms.
- a contactor control method thus comprises several steps.
- a first step consists in receiving the order of opening of the contactor 10, 100, by the control device 20, when the first 12, 104 and second 14, 116 switches are in the closed position.
- a second step consists of the displacement of each first movable contact 26, 112 in the open position.
- a third step consists of the displacement of each second movable contact 30, 116 in the open position, once each first movable contact 26, 112 is in the open position and with a time offset of between 10 ms and 1 s, preferably between 50 ms and 500 ms, more preferably between 50 ms and 100 ms.
- the second switches 106 are connected in parallel previously to the second step of the control method, since each first movable contact 112 is in the closed position, and the second switches 106 are connected in parallel. series following the second step and previously to the third step of the control method, since each first movable contact 112 is in the open position.
- the embodiment of the invention makes it possible to produce contactors 10 with compact dimensions, that is to say for example a length of 100 millimeters, a width of 50 mm and a height of 50 mm.
- the number of second switches 14, 106 connected in series and dedicated to the cut, that is to say, able to see an electric arc to be formed between their second movable contacts 30, 116 and their second fixed contacts 28, 114 is for example increased to be suitable for breaking high voltages.
- the increase in the number of contacts in series makes it possible to split the electric arc.
- the aspect not included in the invention makes it possible to propose an even smaller size of the contactor 10, because the second switches 14 have dimensions smaller than the first switches 12 since their contacts 28, 30 are not dimensioned to have a heating limited, unlike 24 contacts, In fact, the second switches 14 are connected in parallel with a first switch 12 dedicated to the thermal function, that is to say capable of undergoing heating below a normative value, when is crossed by a nominal current.
- the embodiment of the invention allows a certain modularity since the number and size of the fixed contacts 24, 28, 110, 114 and mobiles 26, 30, 112, 116, is variable.
- the second switches 14 are dimensioned according to the requirements of the electrical installation, independently of the first switch 12.
- control device comprises a single control member suitable for moving the first contact carrier and the contactor comprises a mechanical member adapted to follow the same displacement as that of the first contact carrier and to move the second contact carrier.
- the mechanical member is at a distance from the second contact carrier so that the displacement of the second contact carrier is performed with a time shift relative to the displacement of the first contact carrier .
- This time difference is a function of the distance between the mechanical member and the second contact holder when the first and second movable contacts are in the closed position.
- the fact that the second switches 106 are connected in parallel when the first movable contact 112 is in the closed position makes it possible to distribute a current flowing through the contactor 100 between the different switches 106 and thus limiting the current flowing through each second switch 106. This makes it possible to limit the heating experienced by the second switches 106 when a current flows through the contactor 100 and thus to provide second switches 106 of reduced dimensions. The size of the contactor 100 is therefore limited.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Keying Circuit Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1356076A FR3007570B1 (fr) | 2013-06-25 | 2013-06-25 | Contacteur electrique et procede de commande d'un tel contacteur |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2819135A1 true EP2819135A1 (de) | 2014-12-31 |
EP2819135B1 EP2819135B1 (de) | 2018-03-14 |
Family
ID=49151171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14173615.7A Active EP2819135B1 (de) | 2013-06-25 | 2014-06-24 | Elektrischer Schaltschütz und Verfahren zur Steuerung eines solchen Schaltschützes |
Country Status (4)
Country | Link |
---|---|
US (1) | US9589754B2 (de) |
EP (1) | EP2819135B1 (de) |
CN (1) | CN104252997B (de) |
FR (1) | FR3007570B1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022116580A1 (de) * | 2022-07-04 | 2024-01-04 | Bayerische Motoren Werke Aktiengesellschaft | Multikontakt-Schaltschütz zur Stromführung und Strombegrenzung |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4536814A (en) * | 1984-03-26 | 1985-08-20 | Eaton Corporation | D. C. power controller with fuse protection |
DE4003722A1 (de) * | 1989-02-13 | 1990-08-16 | Vni Pk I T I Vzryvozaschi | Verfahren zum schalten eines elektrischen stromkreises und einrichtung zu seiner durchfuehrung |
EP2061052A2 (de) * | 2007-11-17 | 2009-05-20 | Moeller GmbH | Schaltgerät für Gleichstrom-Anwendungen |
WO2011147458A1 (en) | 2010-05-28 | 2011-12-01 | Abb Research Ltd | A dc switching device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6258535A (ja) * | 1985-09-06 | 1987-03-14 | オムロン株式会社 | 電磁接触器におけるインタ−ロツク機構 |
CN1271656A (zh) * | 1999-04-27 | 2000-11-01 | 烟台弼圣机械电子技术开发有限责任公司 | 不间断式变速箱 |
JP4116420B2 (ja) * | 2002-12-18 | 2008-07-09 | 富士通株式会社 | 電気接点装置およびその製造方法 |
JP4599260B2 (ja) * | 2004-09-28 | 2010-12-15 | プライムアースEvエナジー株式会社 | 電源制御装置、電源制御方法、プログラム及び記録媒体 |
FR2931583A1 (fr) * | 2008-05-22 | 2009-11-27 | Schneider Electric Ind Sas | Dispositif de contact pour contacteur de forte puissance resistive |
-
2013
- 2013-06-25 FR FR1356076A patent/FR3007570B1/fr not_active Expired - Fee Related
-
2014
- 2014-06-19 US US14/309,023 patent/US9589754B2/en active Active
- 2014-06-24 EP EP14173615.7A patent/EP2819135B1/de active Active
- 2014-06-24 CN CN201410286187.6A patent/CN104252997B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4536814A (en) * | 1984-03-26 | 1985-08-20 | Eaton Corporation | D. C. power controller with fuse protection |
DE4003722A1 (de) * | 1989-02-13 | 1990-08-16 | Vni Pk I T I Vzryvozaschi | Verfahren zum schalten eines elektrischen stromkreises und einrichtung zu seiner durchfuehrung |
EP2061052A2 (de) * | 2007-11-17 | 2009-05-20 | Moeller GmbH | Schaltgerät für Gleichstrom-Anwendungen |
WO2011147458A1 (en) | 2010-05-28 | 2011-12-01 | Abb Research Ltd | A dc switching device |
Also Published As
Publication number | Publication date |
---|---|
CN104252997A (zh) | 2014-12-31 |
EP2819135B1 (de) | 2018-03-14 |
FR3007570B1 (fr) | 2015-07-17 |
US20140376144A1 (en) | 2014-12-25 |
FR3007570A1 (fr) | 2014-12-26 |
US9589754B2 (en) | 2017-03-07 |
CN104252997B (zh) | 2018-07-17 |
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