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EP3993002A1 - Bewegliche kontaktdruckhaltestruktur, bewegliche kontaktanordnung und dualer leistungsübertragungsschalter - Google Patents

Bewegliche kontaktdruckhaltestruktur, bewegliche kontaktanordnung und dualer leistungsübertragungsschalter Download PDF

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Publication number
EP3993002A1
EP3993002A1 EP21306463.7A EP21306463A EP3993002A1 EP 3993002 A1 EP3993002 A1 EP 3993002A1 EP 21306463 A EP21306463 A EP 21306463A EP 3993002 A1 EP3993002 A1 EP 3993002A1
Authority
EP
European Patent Office
Prior art keywords
movable contact
spring
pressure maintaining
shaped flange
maintaining structure
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
Application number
EP21306463.7A
Other languages
English (en)
French (fr)
Other versions
EP3993002B1 (de
Inventor
Yanming PAN
Zhenzhong Liu
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 EP3993002A1 publication Critical patent/EP3993002A1/de
Application granted granted Critical
Publication of EP3993002B1 publication Critical patent/EP3993002B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/225—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member the supporting member being pivotable
    • 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
    • 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
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • 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 present disclosure relates to a movable contact pressure maintaining structure, in particular to a movable contact pressure maintaining structure for a dual-power transfer switch (also called ATS).
  • the present disclosure further relates to a movable contact assembly, which includes the movable contact pressure maintaining structure as described above.
  • the present disclosure further relates to a dual-power transfer switch, which includes the movable contact pressure maintaining structure as described above.
  • the movable contact of the dual-power transfer switch (also called ATS) has bidirectional contacts, so that it can contact with a first stationary contact of a first power supply and a second stationary contact of a second power supply.
  • the movable contact pressure maintaining mechanism generally includes two independent elastic devices respectively for the two contacts, which leads to a large occupied space and an unstable contact pressure.
  • the contact surface (silver spot) of the movable contact and the stationary contact becomes thinner due to ablation (i.e., the overtravel becomes smaller)
  • the contact pressure changes greatly, which affects the mechanical and electrical properties of the dual-power transfer switch.
  • a movable contact pressure maintaining structure which acts on a movable contact of a dual-power transfer switch.
  • the movable contact pressure maintaining structure includes at least a pair of spring holders and at least a pair of springs.
  • Two corresponding spring holders in the at least a pair of spring holders are staggered and installed together relative to each other.
  • the two spring holders are arranged such that two springs of the at least a pair of springs are respectively installed between the two spring holders in parallel.
  • the movable contact is held between the two spring holders and between the two springs.
  • the installation space is small and compact, and a plurality of movable contacts can be installed side by side and their contact pressures are independent of each other, which greatly improves the rated current capacity and short-time current withstand performance of ATS.
  • the at least a pair of spring holders include a first spring holder and a second spring with a same structure and a same size.
  • the at least a pair of springs include a first spring and a second spring.
  • the first spring holder includes a first base portion, a first L-shaped flange and a first U-shaped portion.
  • the first L-shaped flange and the first U-shaped portion are respectively located at and extend from two ends of the first base portion.
  • the first base portion defines an elongated first through hole therein.
  • the first base portion is provided with a first step portion on a side thereof close to the first L-shaped flange.
  • the first base portion is provided with a first groove on a side thereof close to the first U-shaped portion.
  • the first groove is located between the first U-shaped portion and the first base portion.
  • the second spring holder includes a second base portion, a second L-shaped flange and a second U-shaped portion.
  • the second L-shaped flange and the second U-shaped portion are respectively located at and extend from two ends of the second base portion.
  • the second base portion defines an elongated second through hole therein.
  • the second base portion is provided with a second step portion on a side thereof close to the second L-shaped flange.
  • the second base portion is provided with a second groove on a side thereof close to the second U-shaped portion.
  • the second groove is located between the second U-shaped portion and the second base portion.
  • the first step portion and the second step portion can be slidably contacted with each other, the second L-shaped flange is in the first through hole, the first L-shaped flange is in the second through hole, an opening of the first U-shaped portion faces the second base portion, and an opening of the second U-shaped portion faces the first base portion.
  • an end of the first spring abuts against the first spring holder.
  • Another end of the first spring abuts against the second L-shaped flange and is guided by the second L-shaped flange.
  • Another end of the second spring abuts against the first L-shaped flange and is guided by the first L-shaped flange.
  • the movable contact can pass through the first through hole and the second through hole and is installed between the first L-shaped flange and the second L-shaped flange.
  • a width of the movable contact is equal to a distance between the first L-shaped flange and the second L-shaped flange, and the movable contact cannot swing freely relative to the first L-shaped flange and the second L-shaped flange.
  • an edge of the first groove holds the first spring along a length of the first spring.
  • An edge of the second groove holds the second spring along a length of the second spring.
  • the first spring is located between the first U-shaped portion and the first base portion.
  • the second spring is located between the second U-shaped portion and the second base portion.
  • Each groove arranged on each spring holder increases the inner cavity space of each spring holder, so that the total width W of the spring holder becomes smaller and the installation space is saved. At the same time, the inner cavity space can limit each spring, thus avoiding each spring from falling off.
  • a movable contact assembly includes at least one movable contact, at least one movable contact pressure maintaining structure as described above, and a movable contact bracket.
  • the movable contact pressure maintaining structure holds the movable contact therein.
  • the movable contact pressure maintaining structure is arranged in the movable contact bracket.
  • the movable contact is installed on the movable contact bracket through a pin.
  • a bracket groove is arranged below the movable contact bracket, and a width of the bracket groove is greater than a width of the movable contact, so that the movable contact can swing around the pin in the bracket groove.
  • the first spring holder of the movable contact pressure maintaining structure abuts against the movable contact bracket at its end close to the first U-shaped portion.
  • the second spring holder of the movable contact pressure maintaining structure abuts against the movable contact bracket at its end close to the second U-shaped portion.
  • the movable contact assembly further includes a limiting piece.
  • the limiting piece is provided with a buckle.
  • the movable contact bracket is provided with a clamping groove.
  • the limiting piece is installed on the movable contact bracket and cannot fall off from the movable contact bracket through a matching of the buckle and the clamping groove; and the limiting piece is installed across the first spring holder and the second spring holder, so that the first spring holder and the second spring holder cannot fall off from the movable contact bracket.
  • the first spring holder and the second spring holder are staggered and installed in the movable contact bracket and limited by the movable contact bracket.
  • One end of the first spring abuts against the first spring holder, and another end of the first spring abuts against the second L-shaped flange and is guided by the second L-shaped flange.
  • One end of the second spring abuts against the second spring holder, and another end of the second spring abuts against the first L-shaped flange and is guided by the first L-shaped flange.
  • the movable contact is installed between the first L-shaped flange and the second L-shaped flange.
  • the movable contact moves in a direction (for example, to the left), the movable contact pushes the second spring holder to move to the left (with the same displacement). Because the first spring holder is immobile due to the limitation of the movable contact bracket, the second spring holder can push the first spring and the second spring to compress at the same time, and the compression amount of the two springs is the same as the displacement of the second spring holder.
  • the restoring force of the movable contact i.e., contact pressure when in contact with the stationary contact
  • the restoring force of the movable contact is provided by two springs at the same time, that is, the effect of doubling the spring force value is realized by connecting the springs in parallel.
  • the pressure of the movable contact is provided by the combined force of two springs, and the stroke of each spring is consistent with the stroke of the movable contact.
  • Parallel springs can regard the two springs as a whole, which is equivalent to arranging a spring with larger force in a narrow space.
  • a plurality of springs are connected in parallel to provide contact pressure, so that a spring with a smaller force value can achieve a larger contact pressure; and when the spring force value is required to be smaller, the volume of the spring can be smaller, thereby saving installation space. 2.
  • Two-way contact pressure is consistent.
  • a dual-power transfer switch is provided, wherein the dual-power transfer switch includes the movable contact pressure maintaining structure as described above.
  • FIG. 1 illustrates a schematic plan view of a movable contact assembly 2 having a movable contact pressure maintaining structure 1 according to the present disclosure, wherein a movable contact 3 of the movable contact assembly 2 is in a dual-split position.
  • FIG. 2 illustrates that the movable contact 3 of the movable contact assembly 2 is in contact with a first stationary contact 4 corresponding to a first power supply (not illustrated).
  • FIG. 1 and FIG. 2 also illustrate a second stationary contact 5 corresponding to a second power supply (not illustrated), and with the rotation of the movable contact assembly 2, the movable contact 3 can be in contact with the second stationary contact 5.
  • a movable contact pressure maintaining structure 1 which acts on a movable contact 3 of a dual-power transfer switch.
  • the movable contact pressure maintaining structure 1 includes at least a pair of spring holders and at least a pair of springs.
  • Two corresponding spring holders in the at least a pair of spring holders are staggered and installed together relative to each other.
  • the two spring holders are arranged such that two springs of the at least a pair of springs are respectively installed between the two spring holders in parallel.
  • the movable contact 3 is held between the two spring holders and between the two springs.
  • the installation space is small and compact, and a plurality of movable contacts can be installed side by side and their contact pressures are independent of each other, which greatly improves the rated current capacity and short-time current withstand performance of ATS.
  • the at least a pair of spring holders include a first spring holder 6 (as illustrated in FIG. 3 ) and a second spring holder 7 (as illustrated in FIG. 4 ) having the same structure and the same size.
  • the at least a pair of springs include a first spring 8 and a second spring 9.
  • the first spring holder 6 includes a first base portion 6-1, a first L-shaped flange 6-2 and a first U-shaped portion 6-3.
  • the first L-shaped flange 6-2 and the first U-shaped portion 6-3 are respectively located at and extend from the two ends of the first base portion 6-1.
  • the first base portion 6-1 defines an elongated first through hole 6-1-1 therein.
  • the first base portion 6-1 is provided with a first step portion 6-1-2 on a side thereof close to the first L-shaped flange 6-2.
  • the first base portion 6-1 is provided with a first groove 6-1-3 on a side thereof close to the first U-shaped portion 6-3.
  • the first groove 6-1-3 is located between the first U-shaped portion 6-3 and the first base portion 6-1.
  • the second spring holder 7 includes a second base portion 7-1, a second L-shaped flange 7-2 and a second U-shaped portion 7-3.
  • the second L-shaped flange 7-2 and the second U-shaped portion 7-3 are respectively located at and extend from the two ends of the second base portion 7-1.
  • the second base portion 7-1 defines an elongated second through hole 7-1-1 therein.
  • the second base portion 7-1 is provided with a second step portion 7-1-2 on a side thereof close to the second L-shaped flange 7-2.
  • the second base portion 7-1 is provided with a second groove 7-1-3 on a side thereof close to the second U-shaped portion 7-3.
  • the second groove 7-1-3 is located between the second U-shaped portion 7-3 and the second base portion 7-1.
  • the first step portion 6-1-2 and the second step portion 7-1-2 can be slidably contacted with each other, the second L-shaped flange 7-2 is located in the first through hole 6-1-1, the first L-shaped flange 6-2 is located in the second through hole 7-1-1, and the opening of the first U-shaped portion 6-3 faces the second base portion 7-1, and the opening of the second U-shaped portion 7-3 faces the first base portion 6-1.
  • one end of the first spring 8 abuts against the first spring holder 6.
  • the other end of the first spring 8 abuts against the second L-shaped flange 7-2 and is guided by the second L-shaped flange 7-2.
  • the other end of the second spring 9 abuts against the first L-shaped flange 6-2 and is guided by the first L-shaped flange 6-2.
  • the movable contact 3 can pass through the first through hole 6-1-1 and the second through hole 7-1-1 and be installed between the first L-shaped flange 6-2 and the second L-shaped flange 7-2.
  • the width of the movable contact 3 is equal to the distance between the first L-shaped flange 6-2 and the second L-shaped flange 7-2, and the movable contact 3 cannot swing freely relative to the first L-shaped flange 6-2 and the second L-shaped flange 7-2.
  • the edge of the first groove 6-1-3 holds the first spring 8 along the length of the first spring 8.
  • the edge of the second groove 7-1-3 holds the second spring 9 along the length of the second spring 9.
  • the first spring 8 is located between the first U-shaped portion 6-3 and the first base portion 6-1.
  • the second spring 9 is located between the second U-shaped portion 7-3 and the second base portion 7-1.
  • Each groove arranged on each spring holder increases the inner cavity space of each spring holder, so that the total width W of the spring holder becomes smaller and the installation space is saved. At the same time, the inner cavity space can limit each spring, thus avoiding each spring from falling off.
  • a movable contact assembly is provided. As illustrated in FIGS. 11 to 13 , the movable contact assembly 2 includes at least one movable contact 3, at least one movable contact pressure maintaining structure 1 as described above, and a movable contact bracket 10.
  • the movable contact pressure maintaining structure 1 holds the movable contact 3 therein.
  • the movable contact pressure maintaining structure 1 is arranged in the movable contact bracket 10.
  • the movable contact 3 is installed on the movable contact bracket 10 through a pin 11.
  • a bracket groove 10-1 is arranged below the movable contact bracket 10, and the width of the bracket groove 10-1 is greater than the width of the movable contact 3, so that the movable contact 3 can swing at a certain angle in the bracket groove 10-1 around the pin 11.
  • the first spring holder 6 of the movable contact pressure maintaining structure 1 abuts against the movable contact bracket 10 at its end close to the first U-shaped portion 6-3.
  • the second spring holder 7 of the movable contact pressure maintaining structure 1 abuts against the movable contact bracket 10 at its end close to the second U-shaped portion 7-3.
  • the movable contact assembly 2 further includes a limiting piece 12.
  • the limiting piece 12 is provided with a buckle 12-1.
  • the movable contact bracket 10 is provided with a clamping groove 10-2.
  • the limiting piece 12 is installed on the movable contact bracket 10 and will not fall off from the movable contact bracket 10, and the limiting piece 12 is installed across the first spring holder 6 and the second spring holder 7, so that the first spring holder 6 and the second spring holder 7 will not fall off from the movable contact bracket 10.
  • each phase is equipped with three movable contacts 3 (for example but not limited to this), so that higher rated current performance and short-time current withstand performance can be realized.
  • the first spring holder 6 and the second spring holder 7 are staggered and installed in the movable contact bracket 10 and limited by the movable contact bracket 10.
  • One end of the first spring 8 abuts against the first spring holder 6, and the other end of the first spring 8 abuts against the second L-shaped flange 7-2 and is guided by the second L-shaped flange 7-2.
  • One end of the second spring 9 abuts against the second spring holder 7, and the other end of the second spring 9 abuts against the first L-shaped flange 6-2 and is guided by the first L-shaped flange 6-2.
  • the movable contact 3 is installed between the first L-shaped flange 6-2 and the second L-shaped flange 7-2.
  • the movable contact 3 moves in a direction (for example, to the left, as illustrated in FIG 7 and FIG 10(b) ), the movable contact 3 pushes the second spring holder 7 to move to the left (with the same displacement). Because the first spring holder 6 is immobile due to the limitation of the movable contact bracket 10, the second spring holder 7 can push the first spring 8 and the second spring 9 to compress at the same time, and the compression amount of the two springs is the same as the displacement of the second spring holder 7. At this time, the restoring force of the movable contact 3 (that is, the contact pressure when in contact with the stationary contact) is provided by two springs at the same time, that is, the effect of doubling the spring force value is realized by connecting the springs in parallel.
  • the restoring force of the movable contact 3 that is, the contact pressure when in contact with the stationary contact
  • the movable contact 3 moves in a direction (for example, to the right, as illustrated in FIG. 10(c) ), the movable contact 3 pushes the first spring holder 6 to move to the right (with the same displacement). Because the second spring holder 7 is immobile due to the limitation of the movable contact bracket 10, the first spring holder 6 can push the first spring 8 and the second spring 9 to compress at the same time, and the compression amount of the two springs is the same as the displacement of the first spring holder 6. At this time, the restoring force of the movable contact 3 (that is, the contact pressure when in contact with the stationary contact) is provided by two springs at the same time, that is, the effect of doubling the spring force value is realized by connecting the springs in parallel.
  • the restoring force of the movable contact 3 that is, the contact pressure when in contact with the stationary contact
  • the pressure of the movable contact 3 is provided by the combined force of two springs, and the stroke of each spring is consistent with the stroke of the movable contact 3.
  • Parallel springs can regard the two springs as a whole, which is equivalent to arranging a spring with larger force in a narrow space.
  • a dual-power transfer switch (not illustrated) is provided, wherein the dual-power transfer switch includes the movable contact pressure maintaining structure 1 as described above.
  • any element, action or instruction used herein should not be interpreted as critical or necessary.
  • the articles “a” and “an” are intended to include one or more items, and may be used interchangeably with “one or more”.
  • the article “the” is intended to include one or more items cited in conjunction with the article “the” and may be used interchangeably with “one or more”.
  • the term “set” is intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.), and may be used interchangeably with “one or more”. When only one item is intended, use the phrase “only one item” or similar language.
  • the term “having”, “including” or “comprising”, variations thereof and the like are intended to be open terms.
  • the phrase “based on” is intended to mean “based at least in part” unless explicitly stated otherwise.
  • the term “or” is intended to be inclusive when used in series, and may be used interchangeably with “and/or” unless otherwise expressly stated (e.g., if used in combination with “or” or “only one of them”).

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  • Contacts (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Push-Button Switches (AREA)
EP21306463.7A 2020-10-29 2021-10-20 Bewegliche kontaktdruckhaltestruktur, bewegliche kontaktanordnung und dualer leistungsübertragungsschalter Active EP3993002B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011180672.7A CN114429871B (zh) 2020-10-29 2020-10-29 动触头压力保持结构、动触头组件和双电源转换开关

Publications (2)

Publication Number Publication Date
EP3993002A1 true EP3993002A1 (de) 2022-05-04
EP3993002B1 EP3993002B1 (de) 2024-07-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21306463.7A Active EP3993002B1 (de) 2020-10-29 2021-10-20 Bewegliche kontaktdruckhaltestruktur, bewegliche kontaktanordnung und dualer leistungsübertragungsschalter

Country Status (3)

Country Link
EP (1) EP3993002B1 (de)
CN (1) CN114429871B (de)
AU (1) AU2021254658B2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115394598A (zh) * 2022-07-29 2022-11-25 河南平高电气股份有限公司 一种隔离开关的动触头组件及隔离开关

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120090972A1 (en) * 2010-04-07 2012-04-19 Aichi Electric Works Co., Ltd. Power transfer switch
US20170309423A1 (en) * 2016-04-21 2017-10-26 Hartland Controls LLC Electrical power transfer switch
EP3929953A1 (de) * 2020-06-24 2021-12-29 Schneider Electric Industries SAS Mechanismus zum halten eines beweglichen kontaktdrucks und transferschalter mit doppelter leistung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2916899B1 (fr) * 2007-06-01 2009-07-10 Schneider Electric Ind Sas Dispositif de contact pour un appareil electrique et auxiliaire de signalisation comportant un tel dispositif
CN106960769B (zh) * 2016-12-26 2018-12-21 杜文福 一种断路安全锁以及双电源切换开关
CN108666159B (zh) * 2017-03-31 2019-12-24 施耐德电器工业公司 双电源转换开关
US11133141B2 (en) * 2019-02-07 2021-09-28 Hamilton Sundstrand Corporation Relay contactor dual linear actuator module system
CN210743813U (zh) * 2019-12-31 2020-06-12 常熟开关制造有限公司(原常熟开关厂） 一种双电源转换开关

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120090972A1 (en) * 2010-04-07 2012-04-19 Aichi Electric Works Co., Ltd. Power transfer switch
US20170309423A1 (en) * 2016-04-21 2017-10-26 Hartland Controls LLC Electrical power transfer switch
EP3929953A1 (de) * 2020-06-24 2021-12-29 Schneider Electric Industries SAS Mechanismus zum halten eines beweglichen kontaktdrucks und transferschalter mit doppelter leistung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115394598A (zh) * 2022-07-29 2022-11-25 河南平高电气股份有限公司 一种隔离开关的动触头组件及隔离开关

Also Published As

Publication number Publication date
EP3993002B1 (de) 2024-07-03
AU2021254658A1 (en) 2022-05-19
CN114429871A (zh) 2022-05-03
AU2021254658B2 (en) 2022-10-13
CN114429871B (zh) 2025-02-28

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