EP4336530A1 - Hin- und hergehender schaltmechanismus mit laststufenschalter - Google Patents

Hin- und hergehender schaltmechanismus mit laststufenschalter Download PDF

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Publication number
EP4336530A1
EP4336530A1 EP22847810.3A EP22847810A EP4336530A1 EP 4336530 A1 EP4336530 A1 EP 4336530A1 EP 22847810 A EP22847810 A EP 22847810A EP 4336530 A1 EP4336530 A1 EP 4336530A1
Authority
EP
European Patent Office
Prior art keywords
assembly
connection
slide
connection rod
movable contact
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.)
Pending
Application number
EP22847810.3A
Other languages
English (en)
French (fr)
Inventor
Ke Wang
Shuqi Zhang
Peng Li
Jinzhong Li
Yu Yin
Geqi LI
Jiaxi LI
Fan Yang
Gang Li
Huanchao CHENG
Nong Zhang
Jinglai WU
Jiantao Sun
Xueli 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.)
China Electric Power Research Institute Co Ltd CEPRI
Original Assignee
China Electric Power Research Institute Co Ltd CEPRI
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 China Electric Power Research Institute Co Ltd CEPRI filed Critical China Electric Power Research Institute Co Ltd CEPRI
Publication of EP4336530A1 publication Critical patent/EP4336530A1/de
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current

Definitions

  • the disclosure relates to the technical field of an on-load tap changer of a transformer, and in particular to a reciprocating switching mechanism of an on-load tap changer.
  • An on-load tap changer is a special switch for switching a primary winding tap or a secondary winding tap of a transformer with load to adjust an output voltage of the transformer.
  • a combined vacuum on-load tap changer is generally configured for adjusting the voltage of the transformer with load.
  • the combined vacuum on-load tap changer is generally composed of three major parts: a driving mechanism, a selector and a switch.
  • the driving mechanism includes an electromotor, a hand-operating mechanism, a brake, a counter, a position indicator, a small control switch and a set of complex transmission gears.
  • the driving mechanism is configured for operating the switch.
  • the switch is composed of a fast mechanism, a main on-off contact, a reciprocating mechanical contact and a transition resistor.
  • a purpose of the present disclosure is to provide a reciprocating switching mechanism of an on-load tap.
  • a reciprocating switching mechanism of an on-load tap changer includes a connection assembly and at least one switching assembly.
  • the at least one switching assembly includes two switching units, the two switching units are arranged on opposite sides of the connection assembly, the two switching units are connected with the connection assembly through a first connection rod and a second connection rod, the first connection rod and the second connection rod are separated by a preset distance, and the first connection rod is slidable relative to the connection assembly.
  • Each of the switching units includes a movable contact assembly and two static contacts, the two static contacts are located at opposite sides of the movable contact assembly, the movable contact assembly is connectable to the static contacts, and the movable contact assembly is slidable relative to the static contacts.
  • each of the two static contacts is connectable with an external support
  • the movable contact assembly is connected with the connection assembly through the first connection rod and the second connection rod, and the movable contact assembly is rotatable around a central axis of the second connection rod.
  • the connection assembly includes a fixed disc and a rotatable disc
  • the fixed disc is provided with a rotation hole
  • the rotation hole extends through the fixed disc along a central axis direction of the fixed disc
  • the fixed disc is provided with a fixed hole
  • the second connection rod goes through the fixed hole
  • the rotatable disc is provided with at least one slide rail
  • the at least one slide rail extends along a circumferential direction of the rotatable disc
  • the first connection rod is slidable along the at least one slide rail
  • the rotatable disc is inserted in the rotation hole
  • the rotatable disc is rotatable relative to the fixed disc.
  • the movable contact assembly includes a rotatable plate and two clamping assemblies, the rotatable plate is connected with the connection assembly through the first connection rod and the second connection rod, the rotatable plate is rotatable around the central axis of the second connection rod, the two clamping assemblies are arranged on the rotatable plate and opposite to each other, the clamping assemblies and the static contacts are arranged in an one-to-one correspondence, and each of the clamping assemblies is configured to clamp a respective one of the static contacts.
  • the switching assembly further includes a slide assembly, the slide assembly is located on a side of the second connection rod away from the first connection rod, the slide assembly goes through the connection assembly, two ends of the slide assembly are respectively inserted in the two switching units, and the slide assembly is slidably connectable with the switching units. Additionally, the slide assembly is slidable relative to the connection assembly.
  • the slide assembly includes a slide rod and two slide blocks which are arranged to opposite to each other, the slide blocks and the switching units are arranged in an one-to-one correspondence, the slide rod goes through the connection assembly, and two ends of the slide rod are inserted in the two slide blocks respectively, and the slide rod is slidable relative to the connection assembly.
  • the rotatable plate is provided with a slide groove, the slide groove extends through the rotatable plate along a central axis direction of the first connection rod, the slide blocks are inserted in the slide groove, and the slide blocks are slidable along the slide groove.
  • the movable contact assembly further includes an elastic member, an installation hole is provided on a side of the slide groove facing away from the slide blocks, one end of the elastic member is connected with an outer peripheral wall of the second connection rod through the installation hole, and another end of the elastic member is connected with the slide blocks. Additionally, the elastic member is in a compression state, and a restoration force of the elastic member is configured to push the rotatable plate to rotate.
  • the clamping assembly for each of the clamping assemblies, includes two clamping plates which are arranged to opposite to each other, the two clamping plates are arranged at a top end and a bottom end of the rotatable plate respectively, the clamping plates are rotatable relative to the rotatable plate, are spaced by a preset distance, and are configured to connect the clamping assembly with a respective one of the static contacts.
  • the clamping plates is provided with an arc-shaped spring sheet, a top end of the clamping plate is provided with a groove, the arc-shaped spring sheet is arranged in the groove, the arc-shaped spring sheet is detachably connected with the clamping plates, and the arc-shaped spring sheet is configured to reset the clamping plate.
  • each of the static contacts includes a fixed part, a first connection part and a second connection part, the first connection part and the second connection part are arranged on opposite sides of the fixed part, and the first connection part is connected with the movable contact assembly. Additionally, a thickness of the first connection part gradually increases along a length direction of the fixed part away from the movable contact assembly.
  • the reciprocating switching mechanism of the on-load tap changer includes the connection assembly and the at least one switching assembly.
  • the at least one switching assembly includes two switching units, the two switching units are arranged on opposite sides of the connection assembly, the two switching units are connected with the connection assembly through a first connection rod and a second connection rod, the first connection rod and the second connection rod are separated by a preset distance, and the first connection rod is slidable relative to the connection assembly.
  • Each of the switching units includes a movable contact assembly and two static contacts, the two static contacts are located at opposite sides of the movable contact assembly, the movable contact assembly is connectable to the static contacts, and the movable contact assembly is slidable relative to the static contacts.
  • One end of each of the two static contacts is connectable with an external support, the movable contact assembly is connected with the connection assembly through the first connection rod and the second connection rod, and the movable contact assembly is rotatable around a central axis of the second connection rod.
  • an on-load tap changer is configured for adjusting a voltage of a transformer with load.
  • the output voltage of the transformer can be adjusted by changing a turn ratio of windings connected to an electric grid.
  • the on-load tap changer takes a total time of 110 seconds(s) to switch from an odd tap to an even tap, and goes through 10 switching states, and each change of switching state corresponds to an action of one contact in the on-load tap changer.
  • an action sequence for switching from the odd tap to the even tap is as the following: opening MC1, closing V2 and V3, opening V1, connecting Z1 to an end b, closing V1, opening V2 and the V3, connecting Z2 to end d, and closing MC2.
  • the on-load tap changer requires a total time of 110s to switch from the even tap to the odd tap, and goes through 10 switching states, and each change of switching state corresponds to an action of one contact in the on-load tap changer.
  • an action sequence for switching from the even tap to the odd tap is as the following: opening the MC2, closing the V2 and the V3, opening V1, connecting Z1 to end a, closing V1, opening V2 and V3, connecting Z2 to end c, and closing MC1.
  • the Z2 is a reciprocating switching mechanism, which is implemented by the present disclosure.
  • the reciprocating switching mechanism 1 of the on-load tap changer includes a connection assembly 10 and at least one switching assembly.
  • Each switching assembly includes two switching units 20, the two switching units 20 are arranged on opposite sides of the connection assembly 10, the two switching units 20 are connected with the connection assembly 10 through a first connection rod 30 and a second connection rod 40, the first connection rod 30 and the second connection rod 40 are separated by a preset distance, and the first connection rod 30 is slidable relative to the connection assembly 10.
  • the first connection rod 30 to be slidable relative to the connection assembly 10
  • the position of the first connection rod 30 on the connection assembly 10 can be changed.
  • the two switching units 20 are arranged respectively at a top end and a bottom end of the connection assembly 10, both the first connection rod 30 and the second connection rod 40 go through the connection assembly 10, and two ends of each of the first connection rod 30 and the second connection rod 40 are inserted in the two switching units 20 respectively.
  • the two switching units 20 are connected with the connection assembly 10 through the first connection rod 30 and the second connection rod 40.
  • a central axis of the first connection rod 30 is parallel to a central axis of the second connection rod 40.
  • each of the switching units 20 includes a movable contact assembly 201 and two static contacts 202, the two static contacts 202 are located at opposite sides of the movable contact assembly 201, the movable contact assembly 201 is connectable to the static contacts 202, and the movable contact assembly 201 is slidable relative to the static contacts 202.
  • the movable contact assembly 201 is clamped with one of the static contacts 202, the movable contact assembly 201 is separated from another one of the static contacts 202.
  • the connection of the movable contact assembly 201 can be switched between the two static contacts 202.
  • each of the two static contacts 202 is connectable with an external support
  • the movable contact assembly 201 is connected with the connection assembly 10 through the first connection rod 30 and the second connection rod 40
  • the movable contact assembly 201 is rotatable around the central axis of the second connection rod 40.
  • the connection assembly 10 includes a fixed disc 101 and a rotatable disc 102, the fixed disc 101 is provided with a rotation hole, the rotation hole extends through the fixed disc 101 along a central axis direction of the fixed disc 101, the rotatable disc 102 is inserted in the rotation hole, and the rotatable disc 102 is rotatable relative to the fixed disc 101.
  • the rotation of the rotatable disc 102 enables the first connection rod 30 to be rotatable relative to the rotatable disc 102, thus facilitating changing the position of the first connection rod 30 on the rotatable disc 102.
  • the central axis of the rotatable disc 102 is parallel to the central axis of the fixed disc 101. In some possible implementations, the central axis of the rotatable disc 102 is aligned with the central axis of the fixed disc 101.
  • the two switching units 20 are connected with the rotatable disc 102 through the first connection rod 30, and the two switching units 20 are connected with the fixed disc 101 through the second connection rod 40.
  • the rotatable disc 102 is provided with at least one slide rail 1021, the at least one slide rail 1021 extends along a circumferential direction of the rotatable disc 102, and the first connection rod 30 is slidable along the at least one slide rail 1021.
  • the slide rail 1021 can guide the first connection rod 30.
  • the at least one slide rail 1021 are provided to correspond to the at least one switching assembly, that is, the number of the slide rails 1021 matches the number of the switching assemblies.
  • the slide rail 1021 has an arc shape, and a central angle of the slide rail 1021 ranges from 80 ° to 100 °. In the embodiment, the central angle of the slide rail 1021 is 92 °.
  • two ends of the slide rail 1021 are arranged as an end A and an end B, the first connection rod 30 is inserted in the slide rail 1021, and two ends of the first connection rod 30 are respectively inserted in two movable contact assemblies 201 which are arranged to opposite to each other.
  • the movable contact assembly 201 rotates to be connected with the lower static contact 202.
  • the movable contact assembly 201 rotates to connect with the upper static contact 202. That is, the state shown in FIG. 3 is taken as an initial state.
  • the rotatable disc 102 By configuring the rotatable disc 102 to rotate counterclockwise, the first connection rod 30 can slide from the end B of the slide rail 1021 to the end A of the slide rail 1021.
  • the movable contact assembly 201 is fixed.
  • the movable contact assembly 201 rotates clockwise around the central axis of the second connection rod 40, and then, the movable contact assembly 201 is separated from the upper static contact 202 and connected with the lower static contact 202.
  • the movable contact assembly 201 includes a rotatable plate 2011 and two clamping assemblies, the rotatable plate 2011 is connected with the connection assembly 10 through the first connection rod 30 and the second connection rod 40.
  • the rotatable plate 2011 is rotatable around the central axis of the second connection rod 40, and the two clamping assemblies are arranged at one end of the rotatable plate 2011 towards the static contacts 202 and opposite to each other.
  • the clamping assemblies and the static contacts 202 are arranged in a one-to-one correspondence.
  • the rotatable plate 2011 further rotates around the central axis of the second connection rod 40, to further drive the two clamping assemblies to rotate. After the two clamping assemblies rotate a certain angle, one of the clamping assemblies can clamp its corresponding static contact 202 and another one of the clamping assemblies can be separated from its corresponding static contact 202.
  • the rotatable plate 2011 is provided with a first through hole and a second through hole, a central axis of the first through hole and a central axis of the second through hole are parallel to the central axis of the fixed disc 101.
  • the first connection rod 30 is inserted in the slide rail 1021, and two ends of the first connection rod 30 are inserted in two first through holes of the two rotatable plates 2011 which are arranged to opposite to each other.
  • the fixed disc 101 is provided with a fixed hole, the fixed hole is arranged corresponding to the second through hole.
  • the second connection rod 40 goes through the fixed hole, and two ends of the second connection rod 40 are inserted in two second through holes of the two rotatable plates 2011 which are arranged to opposite to each other.
  • the lower clamping assembly clamps the lower static contact 202.
  • the rotatable disc 102 rotates clockwise and the first connection rod 30 slides along the slide rail 1021.
  • an outer peripheral wall of the first connection rod 30 is pushed against an inner wall of the end B of the slide rail 1021.
  • the movable contact assembly 201 is fixed.
  • the rotatable disc 102 further rotates clockwise, both the first connection rod 30 and the rotatable plates 2011 rotate counterclockwise around the central axis of the second connection rod 40, and one end of the upper static contact 202 slides into the upper clamping assembly.
  • the rotatable disc 102 stops the rotation when the rotation angle of the rotatable disc 102 ranges from 100 ° to 120 °, and the upper clamping assembly is connected with the upper static contact 202. In the embodiment, when the rotation angle of the rotatable disc 102 is 110 °, the upper clamping assembly is connected with the upper static contact 202.
  • the switching assembly further includes a slide assembly 50.
  • the slide assembly 50 is located on a side of the second connection rod 40 facing away from the first connection rod 30, the slide assembly 50 goes through the connection assembly 10, and two ends of the slide assembly 50 are respectively inserted in the two switching units 20.
  • the slide assembly 50 is slidable relative to the connection assembly 10, and the slide assembly 50 is also slidable relative to the switching units 20.
  • the slide assembly 50 can be driven to slide relative to the connection assembly 10, and the slide assembly 50 can be also driven to slide relative to the switching units 20.
  • the slide assembly 50 includes a slide rod 501 and two slide blocks 502 which are arranged to opposite to each other, the slide blocks 502 and the switching units 20 are arranged in an one-to-one correspondence, the slide rod 501 goes through the connection assembly 10, two ends of the slide rod 501 are inserted in the two slide blocks 502 respectively, and the slide rod 501 is slidable relative to the connection assembly 10.
  • the rotatable plate 2011 is provided with a slide groove 20111, the slide groove 20111 extends through the rotatable plate 2011 along the central axis direction of the first connection rod 30, the slide blocks 502 are inserted in the slide groove 20111, and the slide blocks 502 are slidable along the slide groove 20111.
  • the slide groove 20111 can guide the slide blocks 502.
  • the fixed disc 101 is provided with a slide opening 1011, which extends through the fixed disc 101 along the central axis of the fixed disc 101.
  • the slide rod 501 goes through the slide opening 1011, both ends of the slide rod 501 are respectively inserted in the two slide blocks 502, and the rotatable plate 2011 rotates around the central axis of the second connection rod 40.
  • the slide rod 501 can drive the slide blocks 502 to slide along the slide opening 1011, and the slide blocks 502 can further drive the slide rod 501 to slide along the slide groove 20111.
  • the central axis of the slide rod 501 is parallel to the central axis of the fixed disc 101, and the second connection rod 40 is arranged between the first connection rod 30 and the slide assembly 50.
  • the slide groove 20111 is arranged between the two clamping assemblies, and an extension direction of the clamping assemblies is tilted relative to an extension direction of the slide groove 20111.
  • the movable contact assembly 201 further includes an elastic member 2013, and an installation hole is provided on a side of the slide groove 20111 facing away from the slide blocks 502.
  • One end of the elastic member 2013 is connected with an outer peripheral wall of the second connection rod 40 through the installation hole, and another end of the elastic member 2013 is connected with the slide blocks 502.
  • the elastic member 2013 is in a compression state, and a restoration force of the elastic member 2013 is configured to push the rotatable plate 2011 to rotate.
  • the restoration force of the elastic member 2013 can act on the slide blocks 502, and the stability of the connection between the clamping assemblies and the static contacts 202 can be improved.
  • the elastic member 2013 rotates to a middle position between the two static contacts 202 at the same vertical height, the elastic member 2013 has the maximum restoration force, which can push the rotatable plate 2011 to rotate in the direction of one of the static contacts 202.
  • the elastic member 2013 has the minimum restoration force.
  • the central axis of the installation hole is perpendicular to the central axis of the second through hole, and the installation hole is connected with the second through hole.
  • the end of the elastic member 2013 facing away from the slide blocks 502 is connected with the outer peripheral wall of the second connection rod 40 through the installation hole.
  • the elastic member 2013 may be a helical spring 27; of course, the elastic member 2013 may also be a sleeve with elasticity.
  • the elastic member 2013 is implemented as the helical spring 27, part of the elastic member 2013 is accommodated in the slide groove 20111, one end of the elastic member 2013 is connected with the outer peripheral wall of the slide blocks 502, and the end of the elastic member 2013 facing away from the slide blocks 502 is connected with the outer peripheral wall of the second connection rod 40 through the installation hole.
  • the elastic member 2013 is in the compression state.
  • the central axis of the elastic member 2013 is perpendicular to the extension direction of the slide opening 1011, the compression amount of the elastic member 2013 is the largest.
  • the rotatable plate 2011 rotates around the central axis of the second connection rod 40, to drive the movement of the slide assembly 50. During this period, the compression amount of the elastic member 2013 gradually decreases.
  • the clamping assembly includes two clamping plates 2012 which are arranged to opposite to each other, the two clamping plates 2012 are arranged at a top end and a bottom end of the rotatable plate 2011 respectively.
  • the clamping plates 2012 are rotatable relative to the rotatable plate 2011, and are spaced by a preset distance.
  • the two clamping plates 2012 can connect the clamping assembly with the respective one of the static contacts 202.
  • the rotatable plate 2011 is provided with an accommodation groove, and the first end of each of the clamping plates 2012 is inserted in the accommodation groove.
  • the first end of each of the clamping plates 2012 is connected with the rotatable plate 2011 through a rotatable shaft 20122, the central axis of the rotatable shaft 20122 is parallel to each of the clamping plates 2012, and each of the clamping plates 2012 is rotatable around the central axis of the rotatable shaft 20122.
  • the second end of each of the clamping plates 2012 extends out of the accommodation groove, and the second ends of the two clamping plates 2012 form a clamping channel.
  • each of the static contacts 202 is inserted in the clamping channel, an outer side wall of each of the static contacts 202 abuts against an inner side wall of the clamping channel, and each of the static contacts 202 is slidable along the clamping channel.
  • the outer side wall of each of the static contacts 202 abuts against the inner side wall of the clamping channel, thus improving the stability of the current through the static contacts 202 and the clamping channel.
  • a space size of the clamping channel can be changed, and the static contacts 202 with different thicknesses can be inserted in the clamping channel, thus improving the adaptability of the clamping assemblies.
  • the clamping plates 2012 is provided with an arc-shaped spring sheet 20121, a top end of the clamping plate 2012 is provided with a groove, the arc-shaped spring sheet 20121 is arranged in the groove, the arc-shaped spring sheet 20121 is detachably connected with the clamping plates 2012, and the arc-shaped spring sheet 20121 is configured to reset the clamping plate 2012.
  • the groove can limit the arc-shaped spring sheet 20121.
  • the stability and compactness between the clamping assemblies and the static contacts 202 can be improved.
  • the arc-shaped spring sheet 20121 is convex towards the side facing away from the clamping plate 2012, and thus, the arc-shaped spring sheet 20121 can provide the restoration force on the clamping plate 2012. As such, the compactness between the clamping assemblies and the static contacts 202 can be improved.
  • each of the static contacts 202 includes a fixed part 2021, a first connection part 2022 and a second connection part 2023.
  • the first connection part 2022 and the second connection part 2023 are arranged on opposite sides of the fixed part 2021, and the first connection part 2022 is connected with the movable contact assembly 201. Additionally, a thickness of the first connection part 2022 gradually increases along a length direction of the fixed part 2021. As such, the first connection part 2022 can be connected with the movable contact assembly 201.
  • the first connection part 2022 is U-shaped, that is, the first connection part 2022 is configured with rounded corners, and the thickness of the first connection part 2022 gradually increases along the length direction of the fixed part 2021.
  • the thickness of the first connection part 2022 sliding into the clamping channel changes from thin to thick successively, and thus, it facilitates the first connection part 2022 to insert into the clamping channel.
  • the stability of the connection between the first connection part 2022 and the clamping assemblies can be improved.
  • FIGS. 6 to 8 show the mechanical principle of the reciprocating switching mechanism.
  • a principle assembly 2 includes elements corresponding to the elements included in the reciprocating switching mechanism 1 in a one-to-one correspondence.
  • a rotatable table 21 corresponds to the rotatable disc 102 in the reciprocating switching mechanism 1
  • an arc-shaped groove 211 corresponds to the slide rail 1021 opened on the rotatable disc 102 in the reciprocating switching mechanism 1
  • a swinging rod 22 corresponds to the movable contact assembly 201 in the reciprocating switching mechanism 1
  • a first upright rod 24 corresponds to the first connection rod 30 in the reciprocating switching mechanism 1
  • a second upright rod 25 corresponds to the second connection rod 40 in the reciprocating switching mechanism
  • a third upright rod 26 corresponds to the slide assembly 50 in the reciprocating switching mechanism 1
  • a spring 27 corresponds to the elastic member 2013 in the reciprocating switching mechanism 1
  • a fixed plate 23 corresponds to the fixed disc 101 in the reciprocating switching mechanism 1
  • a first slideway 231
  • Two ends of the arc-shaped groove 211 are respectively arranged as an end a and an end b.
  • the end a corresponds to the end A and the end b corresponds to the end B.
  • the rotatable table 21 rotates counterclockwise to drive the swinging rod 22 to rotate clockwise until the swinging rod 22 contacts one of the fixed blocks 28, to complete a switching action.
  • the reciprocating switching mechanism 1 of the on-load tap changer includes the connection assembly 10 and the at least one switching assembly.
  • the at least one switching assembly includes two switching units 20, the two switching units 20 are arranged on opposite sides of the connection assembly 10, the two switching units 20 are connected with the connection assembly 10 through the first connection rod 30 and the second connection rod 40, the first connection rod 30 and the second connection rod 40 are separated by a preset distance, and the first connection rod 30 is slidable relative to the connection assembly 10.
  • Each of the switching units 20 includes the movable contact assembly 201 and the two static contacts 202, the two static contacts 202 are located at opposite sides of the movable contact assembly 201, the movable contact assembly 201 is connectable to the static contacts 202, and the movable contact assembly 201 is slidable relative to the static contacts 202.
  • One end of each of the two static contacts 202 is connectable with the external support, the movable contact assembly 201 is connected with the connection assembly 10 through the first connection rod 30 and the second connection rod 40, and the movable contact assembly 201 is rotatable around the central axis of the second connection rod 40.
  • Such arrangement improves the stability of the installation, while improving the insulation strength between electrodes.
  • the reciprocating switching mechanism 1 of the on-load tap-changer provided by the present disclosure has the following advantages: the device is with a simple structure, easy to be manufactured, and convenient to be operated.
EP22847810.3A 2021-07-27 2022-02-11 Hin- und hergehender schaltmechanismus mit laststufenschalter Pending EP4336530A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110850706.7A CN113745014B (zh) 2021-07-27 2021-07-27 一种有载分接开关的往复式切换机构
PCT/CN2022/076017 WO2023005190A1 (zh) 2021-07-27 2022-02-11 一种有载分接开关的往复式切换机构

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Publication Number Publication Date
EP4336530A1 true EP4336530A1 (de) 2024-03-13

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EP22847810.3A Pending EP4336530A1 (de) 2021-07-27 2022-02-11 Hin- und hergehender schaltmechanismus mit laststufenschalter

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EP (1) EP4336530A1 (de)
CN (1) CN113745014B (de)
WO (1) WO2023005190A1 (de)

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Publication number Priority date Publication date Assignee Title
CN113745014B (zh) * 2021-07-27 2022-10-04 中国电力科学研究院有限公司 一种有载分接开关的往复式切换机构

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CN104465168A (zh) * 2014-12-12 2015-03-25 国家电网公司 一种真空式有载分接开关过渡电路及操作方法
CN207338170U (zh) * 2017-06-22 2018-05-08 西安森宝电气工程有限公司 一种真空有载分接开关
CN113745014B (zh) * 2021-07-27 2022-10-04 中国电力科学研究院有限公司 一种有载分接开关的往复式切换机构

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