EP4246546B1 - Automatischer übertragungsschalter und kontaktsystem für automatischen übertragungsschalter - Google Patents

Automatischer übertragungsschalter und kontaktsystem für automatischen übertragungsschalter

Info

Publication number
EP4246546B1
EP4246546B1 EP23305361.0A EP23305361A EP4246546B1 EP 4246546 B1 EP4246546 B1 EP 4246546B1 EP 23305361 A EP23305361 A EP 23305361A EP 4246546 B1 EP4246546 B1 EP 4246546B1
Authority
EP
European Patent Office
Prior art keywords
contact
stationary contact
stationary
movable contact
automatic transfer
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.)
Active
Application number
EP23305361.0A
Other languages
English (en)
French (fr)
Other versions
EP4246546A1 (de
EP4246546C0 (de
Inventor
Xiangyu GENG
Zhenzhong Liu
Gang Yu
Xiaojing ZENG
Bin Zhou
Haitao Sun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP4246546A1 publication Critical patent/EP4246546A1/de
Application granted granted Critical
Publication of EP4246546B1 publication Critical patent/EP4246546B1/de
Publication of EP4246546C0 publication Critical patent/EP4246546C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/018—Application transfer; between utility and emergency power supply

Definitions

  • the electrical performance index Icm/Icw of an automatic transfer switch is an index that considers the ability of the product to withstand high currents in the circuit. At present, there are two main types of failures for this index: fusion welding and contact burnout.
  • the present disclosure aims to overcome at least some of the abovementioned problems in the prior art.
  • a dimension of the chamfered corner in the vertical direction is 80%-130% of a dimension of the second part in the vertical direction.
  • the at least one stationary contact further includes a magnetically conductive block connected to the chamfered corner, and the magnetically conductive block is formed of a magnetically conductive material.
  • a thickness of the magnetically conductive block is greater than a thickness of the at least one stationary contact.
  • an automatic transfer switch includes one or more contact systems for the automatic transfer switch as claimed.
  • the stationary contact assembly includes a magnetically conductive block connected to the chamfered corner of the stationary contact.
  • the magnetically conductive block can guide the electromagnetic field or magnetic flux, so that the magnetic flux is better concentrated in the magnetically conductive block, thereby reducing the magnetic flux in the movable contact assembly, thus reducing the electromagnetic force (Lorentz force) that tends to separate the movable contact assembly from the stationary contact. Therefore, the magnetically conductive block can further improve the short-term current withstand index of the contact system.
  • Fig. 1 shows a perspective view of an automatic transfer switch 10 according to one or more embodiments of the present disclosure.
  • the automatic transfer switch 10 includes a plurality of first power input terminals 12a, a plurality of second power input terminals 12b and a plurality of output terminals 14.
  • the automatic transfer switch 10 also includes a plurality of contact systems 100 (only one contact system is shown in the figure).
  • the contact system 100 includes a movable contact assembly 110, a first stationary contact assembly 140 and a second stationary contact assembly 170.
  • the automatic transfer switch 10 has four first power input terminals, four second power input terminals and four output terminals, and four contact systems (only one contact system is shown in the figure).
  • the automatic transfer switch can have any suitable numbers of first power input terminals, second power input terminals, output terminals and contact systems.
  • the automatic transfer switch can have any suitable form and number of terminals, and is not limited to the form and number of terminals shown in Fig. 1 (the first power input terminals, the second power input terminal and the output terminal), as long as these terminals of the automatic transfer switch can be properly connected to the stationary contacts and the movable contact of the contact system.
  • Fig. 2 shows a perspective view of the contact system 100.
  • the movable contact assembly 110 of the contact system 100 includes a pair of movable contact pieces 120, a movable contact actuating device 112 and a movable contact conductive member 114.
  • the movable contact actuating device 112 drives the pair of movable contact pieces 120 to move.
  • the movable contact conductive member 114 is electrically connected to the pair of movable contact pieces 120 of the movable contact assembly 110, for electrically connecting the pair of movable contact pieces 120 to the output terminals of the automatic transfer switch 10.
  • the pair of movable contact pieces 120 are parallel to each other and spaced apart from each other, and define a receiving space therebetween.
  • the first stationary contact assembly 140 includes a first stationary contact 150 and a first stationary contact conductive member 142.
  • the first stationary contact conductive member 142 is electrically connected to the first stationary contact 150, for electrically connecting the first stationary contact 150 to the corresponding power input terminal.
  • the second stationary contact assembly 170 includes a second stationary contact 180 and a second stationary contact conductive member 172.
  • the second stationary contact conductive member 172 is electrically connected with the second stationary contact 180, for electrically connecting the second stationary contact 180 to the corresponding power input terminal.
  • Figs. 3A and 3B show front views of the contact system 100, wherein Fig. 3A shows a double separation position where the movable contact assembly 110 is not in contact with both the first stationary contact assembly 140 and the second stationary contact assembly 170, and Fig. 3B shows a first contact position where the movable contact assembly 110 is in contact with the first stationary contact assembly 140.
  • the contact assembly system 100 also includes a second contact position (not shown) where the movable contact assembly 110 is in contact with the second stationary contact assembly 170.
  • the first stationary contact 150 includes a first part (vertical extension part) 162 extending in a vertical direction and a second part (horizontal extension part) 164 extending in a horizontal direction.
  • a lower end (a first vertical end) of the first part 162 meets a right end (a first horizontal end) of the second part 164 to form a generally L-shape.
  • the second part 164 includes a conductive connection part 154 arranged at or close to a left end (a second horizontal end) of the second part 164.
  • the conductive connection part 154 is connected with the first stationary contact conductive member 142 for electrically connecting the first stationary contact 150 to the corresponding power input terminal of the automatic transfer switch 10.
  • a chamfered corner 166 is formed at a joint position of the first part 162 and the second part 164 of the first stationary contact 150.
  • the chamfered corner 166 has a horizontal dimension D1 and a vertical dimension D2.
  • the first part 162 has a horizontal dimension D3 and the second part 164 has a vertical dimension D4.
  • D1 is 80%-130% of D3, and D2 is 80%-130% of D4.
  • Fig. 5A shows a front view of the first stationary contact assembly 240 of the automatic transfer switch according to a comparative embodiment
  • Fig. 5B is a front view of the first stationary contact 250, showing the current in the first stationary contact 250 when the movable contact assembly of the automatic transfer switch is in contact with the first stationary contact assembly 240
  • the first stationary contact assembly 240 includes a first stationary contact 250 and a first stationary contact conductive member 242.
  • the first stationary contact 250 includes a first part 262 extending in the vertical direction and a second part 264 extending in the horizontal direction.
  • the second part 264 has a conductive connection part 254 at or close to the left end of the second part 264, and the conductive connection part 254 is connected with the first stationary contact conductive member 242.
  • the first stationary contact 250 also includes an arc striking corner 256.
  • the main difference between the first stationary contact assembly 240 and the first stationary contact assembly 140 is that the first stationary contact 250 does not include the chamfered corner.
  • Other aspects of the first stationary contact assembly 240 are similar to those of the first stationary contact assembly 140, and detailed description thereof is omitted herein.
  • Fig. 6A is a front view of a part of the contact system 100 according to the invention, showing the current in the contact system 100 at the first contact position of the movable contact assembly 110.
  • the current in the contact system 100 includes a current section p12 in the movable contact assembly 110, a current section p14 in the first part 162 of the first stationary contact 150, a current section p16 in a transition part between the first part 162 and the second part 164 of the first stationary contact 150, and a current section p18 in the second part 164 of the first stationary contact 150.
  • the first stationary contact 150 includes the chamfered corner 166 at the joint position of the first part 162 and the second part 164
  • the length of the current section p14 in the first part 162 of the first stationary contact 150 is shortened (compared with the current section p24 in Fig. 5B ), and the current section p16 in the transition part is added between the current section p14 in the first part 162 and the current section p18 in the second part 164, the current section p16 is inclined to the current section p14.
  • black line segments p24, p28, p12, p14, p16 and p18 are used to represent the current passing through the first stationary contact 250 and the first stationary contact 150.
  • This representation is schematic, and the actual current is not limited to the position shown by the black line segments.
  • the current sections p14 and p16 in Fig. 6A roughly correspond to the currents in the regions indicated by dotted lines p14 and p16 in Fig. 4B , respectively.
  • Fig. 6B shows a schematic diagram of the electromagnetic force (Lorentz force) applied upon the current section p12 (movable contact assembly 110) in Fig. 6A .
  • the current section p14 in the first part 162 of the first stationary contact 150 generates an electromagnetic field M14, which generates a clockwise electromagnetic force (Lorentz force) F upon the current section p12 in the movable contact assembly 110.
  • This clockwise electromagnetic force F tends to separate the movable contact assembly 110 from the first stationary contact 150.
  • the first stationary contact 150 includes the chamfered corner 166, the length of the current section p14 in the first part 162 of the first stationary contact 150 is significantly shortened compared with the current section p24 shown in Fig. 5B .
  • the first stationary contact assembly 140 includes a magnetically conductive block 168 connected to the chamfered corner 166.
  • the magnetically conductive block 168 is made of a magnetically conductive material, which may be, for example, low carbon steel, silicon steel sheet, etc. Due to the existence of the magnetically conductive block 168, the electromagnetic field or magnetic flux generated by the first stationary contact 150, for example, the current section p14 therein, is guided, so as to be more intensively distributed in the magnetically conductive block 168. Therefore, the electromagnetic field intensity of the electromagnetic field M14 generated by the current section p14 at the movable contact assembly 110 decreases, and the electromagnetic force F of the current section p14 to the movable contact assembly 110 decreases.
  • the contact system of the embodiment shown in the accompanying drawings is a clamping contact system, and its movable contact assembly includes a pair of movable contact pieces.
  • the pair of movable contact pieces are parallel to each other and spaced apart from each other, and define a receiving space therebetween.
  • the pair of movable contact pieces 120 of the movable contact assembly clamp the corresponding stationary contact therebetween.
  • the current flows in the same direction along the pair of movable contact pieces that are parallel to each other.
  • the bottom of the U-shaped structure of the magnet enhancement piece 124' is arranged on the back surface of the movable contact piece body 122', and the two arms of the U-shaped structure of the magnet enhancement piece 124' are arranged on the two lateral surfaces of the movable contact piece body 122'.
  • the U-shaped magnetized plate 124' can better guide and concentrate the electromagnetic field, so the U-shaped magnetized plate 124' can effectively improve the short-term current withstand index of the clamping contact system.
  • the terms indicating directions such as “vertical” and “horizontal” of the first part and the second part of the stationary contact are based on the orientation shown in the accompanying drawings (for example, Figs. 3A-3B , 4A-4B and 6A ). These terms are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the first part and the second part of the stationary contact must have a specific orientation, be constructed and operated in a specific orientation.
  • the first part and the second part of the stationary contact basically extend in the vertical direction and the horizontal direction, that is, the first part and the second part are perpendicular to each other.
  • the extending directions of the first part and the second part of the stationary contact may be within the range of +/-5 degrees of mutually perpendicular directions.
  • the extending directions of the first part and the second part of the stationary contact can be within the range of +/-10 degrees, +/-15 degrees, or +/-20 degrees of mutually perpendicular directions.

Landscapes

  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (10)

  1. Kontaktsystem (100) für einen automatischen Übertragungsschalter, wobei das Kontaktsystem einen ersten stationären Kontakt (150), einen zweiten stationären Kontakt (180) und einen beweglichen Kontakt (120) umfasst, wobei
    der erste stationäre Kontakt und der zweite stationäre Kontakt jeweils einen stationären Kontakteingriffsteil (152) und einen leitfähigen Verbindungsteil (154) umfassen, der geeignet ist, elektrisch mit einem Drahtverbindungsanschluss des automatischen Übertragungsschalters verbunden zu werden, wobei der bewegliche Kontakt (120) zwischen einer ersten Kontaktposition und einer zweiten Kontaktposition beweglich ist, wobei der bewegliche Kontakt (120) in der ersten Kontaktposition des beweglichen Kontakts (120) in Kontakt mit dem stationären Kontakteingriffsteil (152) des ersten stationären Kontakts (150) ist und der bewegliche Kontakt in der zweiten Kontaktposition des beweglichen Kontakts (120) in Kontakt mit dem stationären Kontakteingriffsteil (152) des zweiten stationären Kontakts (180) ist,
    wobei mindestens ein stationärer Kontakt des ersten stationären Kontakts (150) und des zweiten stationären Kontakts (180) umfasst:
    einen ersten Teil (162), der sich in einer vertikalen Richtung erstreckt und ein erstes vertikales Ende und ein zweites vertikales Ende umfasst; und einen zweiten Teil (164), der sich in einer horizontalen Richtung erstreckt und ein erstes horizontales Ende und ein zweites horizontales Ende umfasst,
    wobei das erste vertikale Ende des ersten Teils (162) auf das erste horizontale Ende des zweiten Teils (164) trifft, der stationäre Kontakteingriffsteil (152) des mindestens einen stationären Kontakts an oder nahe dem zweiten vertikalen Ende des ersten Teils ist, der leitfähige Verbindungsteil (154) des mindestens einen stationären Kontakts an oder nahe dem zweiten horizontalen Ende des zweiten Teils (164) ist und eine abgeschrägte Ecke (166) an einer Verbindungsposition des ersten Teils (162) und des zweiten Teils (164) des mindestens einen stationären Kontakts (150) ausgebildet ist,
    dadurch gekennzeichnet, dass
    der mindestens eine stationäre Kontakt (150) ferner einen magnetisch leitfähigen Block (168) umfasst, der mit der abgeschrägten Ecke (166) verbunden ist, und der magnetisch leitfähige Block (168) aus einem magnetisch leitfähigen Material ausgebildet ist.
  2. Kontaktsystem für einen automatischen Übertragungsschalter nach Anspruch 1, wobei eine horizontale Abmessung der abgeschrägten Ecke (166) 80%-130% einer horizontalen Abmessung des ersten Teils beträgt.
  3. Kontaktsystem für einen automatischen Übertragungsschalter nach Anspruch 1, wobei eine vertikale Abmessung der abgeschrägten Ecke (166) 80%-130% einer vertikalen Abmessung des zweiten Teils beträgt.
  4. Kontaktsystem für einen automatischen Übertragungsschalter nach Anspruch 1, wobei eine Dicke des magnetisch leitfähigen Blocks (168) größer als eine Dicke des mindestens einen stationären Kontakts ist.
  5. Kontaktsystem für einen automatischen Übertragungsschalter nach Anspruch 1, wobei der stationäre Kontakt (150) ferner eine Lichtbogenschlagecke (156, 256) umfasst, die sich in der horizontalen Richtung von dem zweiten vertikalen Ende des ersten Teils (162) erstreckt, und eine Erstreckungsrichtung der Lichtbogenschlagecke dieselbe wie eine Erstreckungsrichtung des zweiten Teils (164) ist.
  6. Kontaktsystem für einen automatischen Übertragungsschalter nach einem der Ansprüche 1 bis 5, wobei der bewegliche Kontakt ein Paar beweglicher Kontaktstücke (120) umfasst, die parallel zueinander und voneinander beabstandet sind, wobei in der ersten Kontaktposition des beweglichen Kontakts die beweglichen Kontaktstücke (120) den stationären Kontakteingriffsteil (152) des ersten stationären Kontakts (150) dazwischen einklemmen, und in der zweiten Kontaktposition des beweglichen Kontakts die beweglichen Kontaktstücke (120) den stationären Kontakteingriffsteil (152) des zweiten stationären Kontakts (180) dazwischen einklemmen.
  7. Kontaktsystem für einen automatischen Übertragungsschalter nach Anspruch 6, wobei jedes des Paars beweglicher Kontaktstücke (120) eine Vorderseite, die dem anderen der beweglichen Kontaktstücke zugewandt ist, und eine Rückseite gegenüber der Vorderseite umfasst, und mindestens eines der beweglichen Kontaktstücke (120) ein Magneterweiterungsstück (124) umfasst, und das Magneterweiterungsstück (124) aus einem magnetisch leitfähigen Material ausgebildet ist.
  8. Kontaktsystem für einen automatischen Übertragungsschalter nach Anspruch 7, wobei das Magneterweiterungsstück (124) eine flache Plattenstruktur ist und auf der Rückseite des mindestens einen der beweglichen Kontaktstücke (120) angeordnet ist.
  9. Kontaktsystem für einen automatischen Übertragungsschalter nach Anspruch 8, wobei das Magneterweiterungsstück (124) eine U-förmige Struktur umfasst, das Magneterweiterungsstück (124) einen Boden, der auf der Rückseite mindestens eines der beweglichen Kontaktstücke (120) angeordnet ist, und zwei Arme, die jeweils auf einer jeweiligen Seitenfläche des mindestens einen der beweglichen Kontaktstücke (120) angeordnet sind, umfasst.
  10. Automatischer Übertragungsschalter, wobei der automatische Übertragungsschalter ein oder mehrere Kontaktsysteme (100) nach einem der Ansprüche 1 bis 9 für den automatischen Übertragungsschalter umfasst.
EP23305361.0A 2022-03-17 2023-03-16 Automatischer übertragungsschalter und kontaktsystem für automatischen übertragungsschalter Active EP4246546B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220590719.5U CN216980376U (zh) 2022-03-17 2022-03-17 用于自动转换开关的触头系统和自动转换开关

Publications (3)

Publication Number Publication Date
EP4246546A1 EP4246546A1 (de) 2023-09-20
EP4246546B1 true EP4246546B1 (de) 2025-08-13
EP4246546C0 EP4246546C0 (de) 2025-08-13

Family

ID=82360764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23305361.0A Active EP4246546B1 (de) 2022-03-17 2023-03-16 Automatischer übertragungsschalter und kontaktsystem für automatischen übertragungsschalter

Country Status (3)

Country Link
EP (1) EP4246546B1 (de)
CN (1) CN216980376U (de)
AU (1) AU2023201673B2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120261200A (zh) * 2024-01-04 2025-07-04 施耐德电气工业公司 用于开关装置的触头组件和开关装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201994187U (zh) * 2011-04-20 2011-09-28 常熟开关制造有限公司(原常熟开关厂） 一种自动转换开关的静触头
CN104681329A (zh) * 2015-02-27 2015-06-03 支朝乾 双电源转换开关的触头系统

Also Published As

Publication number Publication date
EP4246546A1 (de) 2023-09-20
AU2023201673A1 (en) 2023-10-05
AU2023201673B2 (en) 2024-04-04
CN216980376U (zh) 2022-07-15
EP4246546C0 (de) 2025-08-13

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