WO2013170404A1 - 一种分接选择器动触头与静触头之间的切换结构 - Google Patents

一种分接选择器动触头与静触头之间的切换结构 Download PDF

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Publication number
WO2013170404A1
WO2013170404A1 PCT/CN2012/001078 CN2012001078W WO2013170404A1 WO 2013170404 A1 WO2013170404 A1 WO 2013170404A1 CN 2012001078 W CN2012001078 W CN 2012001078W WO 2013170404 A1 WO2013170404 A1 WO 2013170404A1
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Prior art keywords
contacts
static
contact
static contacts
electrically connected
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PCT/CN2012/001078
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English (en)
French (fr)
Inventor
沈旭
Original Assignee
上海华明电力设备集团有限公司
上海华明电力设备制造有限公司
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Application filed by 上海华明电力设备集团有限公司, 上海华明电力设备制造有限公司 filed Critical 上海华明电力设备集团有限公司
Priority to IN2323MUN2014 priority Critical patent/IN2014MN02323A/en
Priority to BR112014028284A priority patent/BR112014028284B8/pt
Priority to KR1020147032191A priority patent/KR101757410B1/ko
Priority to DE112012006380.5T priority patent/DE112012006380B4/de
Publication of WO2013170404A1 publication Critical patent/WO2013170404A1/zh

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Classifications

    • 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
    • H01H9/0005—Tap change devices
    • H01H9/0016—Contact arrangements for tap changers
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/56—Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
    • 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

Definitions

  • the invention relates to the technical field of a transformer on-load tap changer, in particular to a switch structure between a movable contact and a static contact of a tap changer on-load tap-changer.
  • the on-load tap-changer changes the turns ratio of the primary and secondary windings of the transformer by changing the winding taps of the connected transformers when the transformer is loaded (ie without power failure), thereby achieving the purpose of changing the output voltage of the transformer.
  • the combined on-load tap-changer is divided into two parts according to the function, namely the switch and the tap selector.
  • the upper part is the switch A and the lower part is the tap selector B.
  • the resistance R is a transition resistance.
  • the transformer main winding a is connected in series with the transformer main tap winding b, the transformer main tap winding b has taps 1-12, taps 1, 3, 5, 7, 9, 11 are located on the singular side, tap 2, 4 6, 8, 10, 12 are located on the double side, the figure shows that the selector is electrically connected at the 3 position on the singular side, and the double side can be preselected at the tap 2 or tap 4 in the case of non-conductivity;
  • the upper switch is switched to the right side, that is, the double side, it is changed to tap 2 or tap 4, which changes the turns of the transformer winding, and changes the turns ratio of the primary and secondary windings of the transformer.
  • the conventional combined on-load tap changer selector adopts two equal-diameter circular structures with concentric rotation and a certain distance in the axial direction, wherein one circle is arranged in a circle and singularly tapped lb, 3b, 5b, 7b, 9b, the static contact of the lib winding tap connected, and the other circle is arranged circumferentially with the static contacts of the double taps 2b, 4b, 6b, 8b, 10b. 12b winding taps.
  • Conventional transformers have 10-18 voltage-regulating taps per phase winding, so that each round structure has 5-9 static contacts (mostly 9) as shown in Figure 2.
  • This concentric rotary structure has certain advantages in the combined on-load tap changer embedded in the vertical structure, but in the combined on-load tap changer arranged horizontally, because the leads la, 2a, 3a, 4a, 5a, 6a, 7a, 8a, 9a, 10a, 11a. 12a from the terminal P of the insulating spacer and the stationary contacts lb, 2b, 3b, 4b, 5b, 6b, 7b of the on-load tap changer selector, 8b, 9b, 10b, llb, 12b are connected.
  • the leads la, 2a> 3a, 4a, 5a, 6a, 7a, 8a, 9a, 6a, 7a, 8a, 9a, 10a, 11a, 12a are affected by the electromagnetic force.
  • the technical problem to be solved by the present invention is to provide a new tap selector moving contact and the problem of the existing combined on-load tap changer selector applied to the external combined on-load tap changer. Switching structure between the stationary contacts.
  • the switching structure between the movable contact and the static contact of the tap selector comprises: an insulating switch bottom plate; and characterized in that:
  • At least two static contacts are fixed at least one row at intervals on the insulating switch bottom plate, and the inner ends of the at least two static contacts are respectively electrically connected to the two tap windings of the transformer;
  • At least one rotary shaft At least one rotary shaft, at least one of the rotary shafts is evenly distributed with at least two movable contacts, and at least two of the movable contacts are electrically connected;
  • At least one curved conductor corresponding to at least two stationary contacts in at least one column
  • the outer ends of the at least one curved conductor and the at least two stationary contacts on the at least one row are located on the same circumference centered on the center of the rotary shaft, and when one of the movable contacts is in the two stationary contacts When switching between, the other moving contact must be electrically connected to the curved conductor.
  • the three static contacts are fixed at least in a row on the bottom plate of the insulating switch, and the inner ends of the three static contacts are respectively connected with the transformer three.
  • the tap windings are electrically connected; the outer ends of the three static contacts and the corresponding arc conductors are located on the same circumference centered on the center of the rotary shaft, when one of the movable contacts is between the three stationary contacts When switching, the other moving contact must be electrically connected to the corresponding curved conductor.
  • the static contacts when the number of the static contacts exceeds three, the static contacts are fixed on the bottom plate of the insulating switch in at least two columns, within each of the static contacts.
  • the terminals are respectively electrically connected to the tap windings corresponding to the transformer; each column has no more than three static touches
  • the number of arc-shaped conductors corresponding to the number of the rows of the static contacts is arranged, and the arc-shaped conductors are electrically connected; the number of the rows corresponding to the number of the stationary contacts is uniformly distributed on the rotary shaft
  • the moving contact when one of the moving contacts is switched between the two stationary contacts in any one of the columns, there must be one moving contact that must be electrically connected to an arcuate conductor.
  • the static contact is divided into a single array of static contacts or a double array of static contacts, a three-phase single array of static contacts or a double array of static contacts along a corresponding axis of rotation axis Parallel directions are arranged in a row, each phase single array of static contacts or double array of static contacts has 9 static contacts, arranged in three columns spaced apart, each column has three static contacts; corresponding to each phase of a single array of static a contact or a double array of static contacts, three of which are evenly distributed on the rotary shaft and electrically connected to each other, and corresponding to a single array of static contacts or double array of static contacts per phase, the arc
  • the shaped conductors are also three and electrically connected to each other, and each of the curved conductors corresponds to a row of static contacts.
  • the curved conductor is an arcuate conductor having a circular cross section.
  • the small size of the structure can reduce the space occupied by the selector, reduce the volume of the switch, and reduce the material cost and the amount of transformer oil.
  • Figure 1 is a schematic diagram of the circuit of the existing combined on-load tap-changer circuit.
  • FIG. 2 is a schematic structural view of a conventional combined on-load tap changer circuit.
  • Fig. 3 is a schematic diagram showing the connection principle of the switching structure circuit between the movable contact and the fixed contact of the tap selector of the present invention.
  • Fig. 4 is a structural schematic view showing an embodiment of a switching structure between a movable contact and a fixed contact of a tap selector according to the present invention.
  • Figure 5 is the switching structure between the moving contact and the fixed contact of the tap selector shown in Figure 4 is switched to Another state diagram. detailed description
  • Fig. 3 is a schematic view showing the principle of the switching structure circuit connection between the movable contact and the fixed contact of the tap selector of the present invention.
  • the number of static contacts is three, respectively, the static contacts 101, 102, 103, three
  • the static contacts 101, 102, 103 are fixed on the switch insulating bottom plate 401 and arranged in a row.
  • the inner ends of the three static contacts 101, 102, 103 are respectively connected to the transformer windings. connection.
  • the stationary contacts 101, 103 are longer and the stationary contacts 102 are shorter, such that the outer ends 101a, 102a, 103a of the three stationary contacts 101, 102, 103 and the curved conductor 200 are located on the same circumference centered on the axis of rotation 300 on.
  • Three movable contacts 310, 320, 330 are evenly distributed on the rotary shaft 300 at 120 degrees, and the three movable contacts 310, 320, 330 are electrically connected to each other.
  • two movable contacts may be evenly distributed on the rotary shaft 300 at 180 degrees.
  • the curved conductor 200 is an arcuate conductor having a circular cross section.
  • the example given in the figure is a 1-phase electric tap selector.
  • the number of tap selectors combined with the transformer voltage-regulating windings is divided into two sets of swing structures in a single array and a double array.
  • There are 9 single array static contacts per phase, and 9 single array static contacts 402.1, 402.2, 402.3, 402.4, 402.5, 402.6, 402.7, 402.8, 402.9 are divided into three columns according to the switching level voltage level and the dynamic contact structure size.
  • the determined distance is axially aligned along the rotary shaft 405 and is fixed to the switch insulating base plate 401.
  • the nine single-array static contacts 402.1, 402.2, 402.3, 402.4, 402.5, 402.6, 402.7, 402.8, 402.9 are respectively electrically connected to the nine single-number tap windings corresponding to the transformer (not shown).
  • the single array of static contacts 402.1, 402.2, 402.3 is a column, wherein the single array of static contacts 402.1 is located in the middle, and the single array of static contacts 402.2, 402.3 are located on the upper and lower sides.
  • the single array of static contacts 402.4, 402.5, 402.6 is a column, wherein the single array of static contacts 402.4 is in the middle, and the single array of static contacts 402.5, 402.6 are located on the upper and lower sides.
  • the single array of static contacts 402.7, 402.8, 402.9 is a column, in which the single array of static contacts 402.7 is in the middle, and the single array of static contacts 402.8, 402.9 are located on the upper and lower sides.
  • the single-array static contacts 402.1, 402.4, 402.7 in the middle are short in length, and the single-array static contacts on both sides 402.2, 402.3 402.5, 402.6, 402.8, 402.9 are long in length, so that each static contact is in contact with the moving contact
  • the parts are all on the same circumference centered on the center of rotation of the moving contact.
  • three single array moving contact sets 403.1, 403.2, 403.3 are arranged at intervals on the rotary shaft 405, and three single array moving contact sets 403.1, 403.2, 403.3 are 120 degrees on the circumference.
  • the axial distance of the three rows of single array static contacts is arranged corresponding to the three rows of single array static contacts, and the three movable contact groups 403.1, 403.2, 403.3 are electrically connected by the conductor 406, the conductor 406 is fixed to the rotary shaft 405.
  • the three sets of moving contact sets 403.1, 403.2, 403.3 are respectively provided three arc-shaped conductors 404.1, 404.2, 404.3, the axial positions of the three arc-shaped conductors 404.1, 404.2, 404.3 and the three-moving contact set 403.1, respectively 403.2, 403.3 correspond to each other, so that during the tap-changing process, the three-moving contact sets 403.1, 403.2, 403.3 can be electrically connected to the three arc-shaped conductors 404.1, 404.2, 404.3, respectively or simultaneously.
  • the three curved conductors 404.1, 404.2, 404.3 are electrically connected by conductors 404.4, 404.5, 404.6.
  • the three curved conductors 404.1, 404.2, and 404.3 are arc-shaped conductors having a circular cross section.
  • the single array of static contacts 402.1, 402 ⁇ 2, 402.3 and the curved conductor 404.1 are on the same circumference centered on the center of the rotary shaft 405, and the single array of static contacts 402.1, 402.2, and 402.3 are arranged at intervals of 40° on the same circumference centered on the center of the rotary shaft 405.
  • the single array of static contacts 402.4, 402.5, 402.6 and the curved conductor 404.2 are on the same circumference centered on the center of the rotary shaft 405, and the single array of stationary contacts 402.4, 402.5 and 402.6 are arranged at intervals of 40° on the same circumference centered on the center of the rotary shaft 405.
  • the single array of static contacts 402.7, 402.8, 402.9 and the curved conductor 404.3 are on the same circumference centered on the center of the rotary shaft 405, and the single array of stationary contacts 402.7, 402.8 and 402.9 are arranged at intervals of 40° on the same circumference centered on the center of the rotary shaft 405.
  • the number and arrangement of double-array static contacts, moving contact sets, curved conductors, and rotary axes per phase are the same as those of single-array static contacts, moving contact sets, and curved conductors, except that they are
  • the insulating substrate 401 is located below the single array.
  • the electrical connection path is an arcuate conductor 404.2 3 ⁇ 4 contact 403.2 - conductor 406 - 3 ⁇ 4 contact 403.1 - contact 402.3.
  • the moving contact of single array or double array, driven by the switch operating mechanism, with the rotation of the rotary shaft the connection can be selected between the nine fixed contacts to achieve the change of the transformer.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Slide Switches (AREA)

Abstract

一种分接选择器动触头与静触头之间的切换结构，包括：一绝缘开关底板（401）；至少两个静触头（101，102，103；401.1，401.2，…，401.9），至少两个静触头呈至少一列间隔地固定在绝缘开关底板上，至少两个静触头的内端分别与变压器对应的分接绕组电连接；至少一回转轴（300；405），回转轴上均布有至少两个动触头（310，320，330；403.1，403.2，403.3），至少两个动触头之间电连接；至少一与呈至少一列的至少两个静触头对应的弧形导体（200；404.1，404.2，404.3），弧形导体与至少一列上的至少两个静触头的外端（101a，102a，103a）位于以回转轴的中心为圆心的同一圆周上，且当其中一个动触头在两个静触头之间切换时，另一动触头一定与弧形导体电连接。该切换结构省掉开关内部连接导体，使各部件固定可靠，安装方便，减少故障隐患。

Description

一种分接选择器动触头与静触头之间的切换结构 技术领域：
本发明涉及变压器有载分接开关技术领域， 特别涉及一种外挂组合式 有载分接开关分接选择器动触头与静触头之间的切换结构。 背景技术：
有载分接开关是在变压器有载（即不停电） 的情况下， 通过改变连接 变压器的绕组抽头， 改变变压器初次级绕组的匝数比， 从而达到改变变压 器输出电压的目的。
组合式有载分接开关按功能分成两个部分， 即切换开关和分接选择器 两部分， 如图 1所示， 上部为切换开关 A， 下部为分接选择器 B。 其中电 阻 R为过渡电阻。 变压器主绕组 a上串接有变压器主分接绕组 b, 变压器 主分接绕组 b具有分接 1-12， 分接 1、 3、 5、 7、 9、 11位于单数侧， 分接 2、 4、 6、 8、 10、 12位于双数侧， 图中所示为选择器在单数侧分接 3位置 导电，双数侧在不导电的情况下可预选择在分接 2或分接 4;当上部切换开 关切换到右侧即双数侧时， 即改变为分接 2或分接 4导电， 从而改变了变 压器绕组的匝数， 也就改变了变压器初次级绕组的匝数比。
参见图 2， 传统组合式有载分接开关选择器是采用同心回转的按轴向 有一定间距两个等直径圆结构，其中一个圆按圆周布置与单数分接 lb、 3b、 5b、 7b、 9b、 lib绕组抽头相连的静触头， 另一个圆按圆周布置与双数分接 2b、 4b、 6b、 8b、 10b. 12b绕组抽头相连的静触头。 常规变压器每相绕组 有 10-18个调压抽头， 这样每个圆结构要分布 5-9个静触头（多数为 9个） 如图 2所示。
这种同心回转结构在埋入立式结构的组合有载分接开关中有一定优越 性， 但在外挂水平布置的组合有载分接开关中， 因为引线 la、 2a、 3a、 4a、 5a、 6a、 7a、 8a、 9a、 10a、 11a. 12a要从绝缘隔板的接线桩头 C上与有载 分接开关选择器的静触头 lb、 2b、 3b、 4b、 5b、 6b、 7b、 8b、 9b、 10b、 llb、 12b连接。 因为有载分接开关使用在高电压、 大电流的环境中， 因电 磁力的作用， 引线 la、 2a> 3a、 4a、 5a、 6a、 7a、 8a、 9a、 10a、 lla、 12a 不能用软线连接， 需用圆铜棒弯曲成形， 从图 2所示可以看出， 引线 la、 2a、 3a、 4a、 5a、 6a、 7a、 8a、 9a、 10a、 lla、 12a需弯成各种形状， 制作 比较困难； 由于级间电压， 各引线之间要保证一定间距， 占用很大空间， 开关油室要做得较大， 即增加设备成本， 也增加变压器油用量； 由于电磁 力的作用， 引线之间位置容易变动， 发生事故。 发明内容：
本发明所要解决的技术问题在于针对现有组合式有载分接开关选择器 所应用于外挂组合式有载分接开关中所存在的问题而提供一种新的分接选 择器动触头与静触头之间的切换结构。
本发明所要解决的技术问题可以通过以下技术方案来实现：
一种分接选择器动触头与静触头之间的切换结构， 包括： 一绝缘开关 底板； 其特征在于， 还包括：
至少两个静触头， 所述至少两个静触头成至少一列间隔地固定在所述 绝缘开关底板上，至少两个静触头的内端分别与变压器两个分接绕组电连 接；
至少一回转轴， 所述至少一回转轴上均布有至少两个动触头， 至少两 个动触头之间电连接；
至少一与至少成一列的至少两个静触头对应的弧形导体；
所述至少一弧形导体与至少一列上的至少两个静触头的外端位于以所 述回转轴的中心为圆心的同一圆周上，且当其中一个动触头在两个静触头 之间切换时， 另一动触头一定与所述弧形导体电连接。
在本发明的一个优选实施例中， 所述静触头为三个， 三个静触头成至 少一列间隔地固定在所述绝缘开关底板上，三个静触头的内端分别与变压 器三个分接绕组电连接；三个静触头的外端与对应的弧形导体位于以所述 回转轴的中心为圆心的同一圆周上，当其中一个动触头在三个静触头之间 切换时， 另一动触头一定与对应的弧形导体电连接。
在本发明的一个优选实施例中， 当所述的静触头数量超过三个时， 所 述静触头将成至少两列方式间隔固定在所述绝缘开关底板上，每一静触头 的内端分别与变压器对应的分接绕组电连接；每一列具有不超过三个静触 头； 同时依据静触头的列数配置与其静触头列数对应数量的弧形导体，各 个弧形导体之间电连接；在所述回转轴上均布有与静触头列数对应数量的 动触头， 当其中一个动触头在任意一列中的两个静触头之间切换时，必定 有一个动触头一定与一个弧形导体电连接。
在本发明的一个优选实施例中，所述静触头分为单数组静触头或双数 组静触头，三相的单数组静触头或双数组静触头沿与对应的回转轴轴线平 行方向间隔成一排排列，每一相单数组静触头或双数组静触头具有 9个静 触头， 分为三列间隔排列，每一列有三个静触头； 对应于每相单数组静触 头或双数组静触头， 动触头为三个均布在所述回转轴上且相互之间电连 接， 同时对应于每相单数组静触头或双数组静触头，所述弧形导体也为三 个且相互之间电连接，每一个弧形导体对应一列静触头， 当其中一个动触 头在任意一列中的两个静触头之间切换时，必定有至少一个动触头一定与 一个弧形导体电连接。
在本发明的一个优选实施例中， 所述弧形导体为截面为圆形的弧形导 体。
由于本发明采用了上述技术方案， 与现有技术相比， 具有如下显著优 点：
1.省掉开关内部连接导体， 使各部件固定可靠， 安装方便， 减少故障 隐患。
2.结构尺寸小， 可缩小选择器占位空间， 縮小开关体积， 降低材料成 本及变压器油的用量。 附图说明：
图 1为现有组合式有载分接开关电路原理示意图。
图 2为传统组合式有载分接开关电路结构示意图。
图 3为本发明分接选择器动触头与静触头之间的切换结构电路连接原 理示意图。
图 4为本发明分接选择器动触头与静触头之间的切换结构一个实施例 的结构示意图。
图 5为图 4所示的分接选择器动触头与静触头之间的切换结构切换至 另一状态示意图。 具体实施方式
下面实施例进一步描述本发明， 但所述实施例仅用于说明本发明而不 是限制本发明。
参见图 3，图 3给出了本发明分接选择器动触头与静触头之间的切换结 构电路连接原理示意图。
在图 3给出的本发明分接选择器动触头与静触头之间的切换结构电路 连接原理示意图中， 静触头数量为三个，分别为静触头 101、 102、 103,三 个静触头 101、 102、 103固定在开关绝缘底板 401上并呈一列排列， 在绝 缘底板 401的另一侧， 三个静触头 101、 102、 103的内端分别与变压器分 接绕组电连接。静触头 101、 103较长， 静触头 102较短， 这样三个静触头 101、 102、 103的外端 101a、 102a、 103a与弧形导体 200位于以回转轴 300 为圆心的同一圆周上。在回转轴 300上呈 120度均布有三个动触头 310、320、 330, 三个动触头 310、 320、 330之间相互电连接。 当然对于图 3给出的本 发明分接选择器动触头与静触头之间的切换结构电路连接原理来说， 也可 以在回转轴 300上呈 180度均布有两个动触头。 弧形导体 200为截面为圆 形的弧形导体。
根据图 3, 分接选择器进行分接选择时， 回转轴 300回转， 动触头 310 在由静触头 102切换至静触头 103的过程中， 动触头 330会始终与弧形导 体 200电连接。 而当动触头 310在由静触头 102切换至静触头 101的过程 中， 动触头 330 ¾ /和动触头 320会始终与弧形导体 200电连接。采用该原 理后， 不再需要引线要从绝缘隔板的接线桩头上与有载分接开关选择器的 静触头连接， 解决了现有技术的问题。
依据图 3的原理和结合变压器调压绕组的数量， 本发明所描述的静触 头、 动触头以及弧形导体的数量和布置方式可以进行任意变化。 下面限于 篇幅， 仅给出一个具体应用方式来说明本发明。
参见图 4,图中给出的实例为 1相电的分接选择器，分接选择器结合变 压器调压绕组的数量按单数组和双数组分成两套回转结构呈上下并列布 置。 每相单数组静触头为 9个， 9个单数组静触头 402.1、402.2、402.3、402.4、 402.5、 402.6、 402.7、 402.8、 402.9分为三列按开关级电压高低和动触头结 构尺寸所确定的距离沿回转轴 405轴向排列，固定在开关绝缘底板 401上。
9个单数组静触头 402.1、 402.2、 402.3、 402.4、 402.5、 402.6、 402.7、 402.8、 402.9内端分别与变压器对应的 9个单数分接绕组电连接（图中未示出）。
单数组静触头 402.1、 402.2、 402.3为一列， 其中单数组静触头 402.1 位于中间， 单数组静触头 402.2、 402.3位于上下两边。
单数组静触头 402.4、 402.5、 402.6为一列， 其中单数组静触头 402.4 位于中间， 单数组静触头 402.5、 402.6位于上下两边。
单数组静触头 402.7、 402.8、 402.9为一列， 其中单数组静触头 402.7 位于中间， 单数组静触头 402.8、 402.9位于上下两边。
中间的单数组静触头 402.1、 402.4、 402.7长度较短， 两边的单数组静 触头 402.2、 402.3 402.5、 402.6、 402.8、 402.9长度较长， 使每一个静触 头与动触头接触的端部均处于以动触头回转中心为圆心的同一圆周上。
对应于三列单数组静触头， 在回转轴 405上间隔布置有三支单数组动 触头组 403.1、 403.2、 403.3， 三支单数组动触头组 403.1、 403.2、 403.3在 圆周按 120度， 在回转轴 405的轴向按三列单数组静触头轴向距离与三列 单数组静触头对应排列， 三支动触头组 403.1、 403.2、 403.3之间通过导体 406进行电连接， 导体 406固定在回转轴 405上。
对应于三支动触头组 403.1、 403.2、 403.3分别设置有三支弧形导体 404.1、 404.2、 404.3, 三支弧形导体 404.1、 404.2、 404.3的轴向位置分别 与三支动触头组 403.1、 403.2、 403.3对应， 使得在分接转换过程中， 三支 动触头组 403.1、403.2、 403.3能够分别或同时与三支弧形导体 404.1、404.2、 404.3电连接。三支弧形导体 404.1、404.2、404.3之间通过导体 404.4、404.5、 404.6电连接。三支弧形导体 404.1、 404.2、 404.3均为截面为圆形的弧形导 体。
对应于动触头组 403.1和弧形导体 404.1,单数组静触头 402.1、 402·2、 402.3与弧形导体 404.1在以回转轴 405的中心为圆心的同一圆周上， 且单 数组静触头 402.1、 402.2、 402.3之间在以回转轴 405的中心为圆心的同一 圆周上以 40° 的间隔排列。 对应于动触头组 403.2和弧形导体 404.2，单数组静触头 402.4、 402.5、 402.6与弧形导体 404.2在以回转轴 405的中心为圆心的同一圆周上， 且单 数组静触头 402.4、 402.5、 402.6之间在以回转轴 405的中心为圆心的同一 圆周上以 40° 的间隔排列。
对应于动触头组 403.3和弧形导体 404.3,单数组静触头 402.7、 402.8、 402.9与弧形导体 404.3在以回转轴 405的中心为圆心的同一圆周上， 且单 数组静触头 402.7、 402.8、 402.9之间在以回转轴 405的中心为圆心的同一 圆周上以 40° 的间隔排列。
每相双数组静触头、 动触头组、 弧形导体、 回转轴的数量和布置方式 均与单数组静触头、 动触头组和弧形导体的数量和布置方式相同， 只是在 开关绝缘底板 401上位于单数组的下方。
在图 4所示的位置中，电的连接通路为弧形导体 404.2 ¾触头 403.2 ——导体 406—— ¾触头 403.1—— 触头 402.3。
在回转轴 405顺时针转 40度后，变成, 5所示位置， 电的连接通路为 弧形导体 404.1、4042——动触头 403.1、403.2·——导体 4(½——动触头 403.3 ——静触头 402.8。
按上述的结构原理， 单数组或双数组的动触头， 在开关操控机构的带 动下， 随着回转轴的转动， 即可在 9支静触头之间选择连接，达到改变接 通变压器调压绕组抽头的作用。
以上内容显示和描述了本发明的基本原理、 主要特征和本发明的优 点。 本行业的人员应该了解， 本发明不受上述实例的限制， 上述实例和说 明中描述的只是说明本发明的原理， 在不脱离本发明精神和范围的前提下 本发明还会有各种变化和改进， 这些变化和改进都将落入要求保护的本发 明范围内。 本发明要求保护范围由所附的权利要求书及其等同物界定。

Claims

权 利 要 求
1.一种分接选择器动触头与静触头之间的切换结构， 包括： 一绝缘开 关底板； 其特征在于， 还包括：
至少两个静触头， 所述至少两个静触头呈至少一列间隔地固定在所述 绝缘开关底板上，至少两个静触头的内端分别与变压器两个分接绕组电连 接；
至少一回转轴， 所述至少一回转轴上均布有至少两个动触头， 至少两 个动触头之间电连接；
至少一与至少成一列的至少两个静触头对应的弧形导体；
所述至少一弧形导体与至少一列上的至少两个静触头的外端位于以所 述回转轴的中心为圆心的同一圆周上，且当其中一个动触头在两个静触头 之间切换时， 另一动触头一定与所述弧形导体电连接。
2.如权利要求 1所述的分接选择器动触头与静触头之间的切换结构， 其特征在于，所述静触头为三个，三个静触头呈至少一列间隔地固定在所 述绝缘开关底板上， 三个静触头的内端分别与变压器三个分接绕组电连 接；三个静触头的外端与对应的弧形导体位于以所述回转轴的中心为圆心 的同一圆周上， 当其中一个动触头在三个静触头之间切换时， 另一动触头 一定与对应的弧形导体电连接。
3.如权利要求 1所述的分接选择器动触头与静触头之间的切换结构， 其特征在于， 当所述的静触头数量超过三个时，所述静触头将呈至少两列 方式间隔固定在所述绝缘开关底板上，每一静触头的内端分别与变压器对 应的分接绕组电连接；每一列具有不超过三个静触头； 同时依据静触头的 列数配置与其静触头列数对应数量的弧形导体， 各个弧形导体之间电连 接；在所述回转轴上均布有与静触头列数对应数量的动触头， 当其中一个 动触头在任意一列中的两个静触头之间切换时，必定有一个动触头一定与 一个弧形导体电连接。
4.如权利要求 1所述的分接选择器动触头与静触头之间的切换结构， 其特征在于，所述静触头分为单数组静触头或双数组静触头，三相的单数 组静触头或双数组静触头沿与对应的回转辨轴线平行方向间隔成一排排 列，每一相单数组静触头或双数组静触头具有 9个静触头，分为三列间隔 排列， 每一列有三个静触头； 对应于每相单数组静触头或双数组静触头， 动触头为三个均布在所述回转轴上且相互之间电连接，同时对应于每相单 数组静触头或双数组静触头， 所述弧形导体也为三个且相互之间电连接， 每一个弧形导体对应一列静触头，当其中一个动触头在任意一列中的两个 静触头之间切换时， 必定有一个动触头一定与一个弧形导体电连接。
5.如权利要求 1所述的分接选择器动触头与静触头之间的切换结构， 其特征在于， 所述弧形导体为截面为圆形的弧形导体。
PCT/CN2012/001078 2012-05-17 2012-08-13 一种分接选择器动触头与静触头之间的切换结构 WO2013170404A1 (zh)

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