WO2017190490A1 - Commutateur haute tension et unité coupe-circuit associée - Google Patents

Commutateur haute tension et unité coupe-circuit associée Download PDF

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Publication number
WO2017190490A1
WO2017190490A1 PCT/CN2016/107286 CN2016107286W WO2017190490A1 WO 2017190490 A1 WO2017190490 A1 WO 2017190490A1 CN 2016107286 W CN2016107286 W CN 2016107286W WO 2017190490 A1 WO2017190490 A1 WO 2017190490A1
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WO
WIPO (PCT)
Prior art keywords
contact
switch
arc
extinguishing chamber
main
Prior art date
Application number
PCT/CN2016/107286
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English (en)
Chinese (zh)
Inventor
门博
孙珂珂
马志华
胡延涛
熊萍萍
朱继斌
程铁汉
张友鹏
闫亚刚
李刚
刘畅
Original Assignee
国家电网公司
平高集团有限公司
河南平高电气股份有限公司
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 国家电网公司, 平高集团有限公司, 河南平高电气股份有限公司 filed Critical 国家电网公司
Publication of WO2017190490A1 publication Critical patent/WO2017190490A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches

Definitions

  • the invention belongs to the field of high voltage switchgear and high voltage electrical appliance manufacturing, and particularly relates to a high voltage switch and a circuit breaker unit thereof.
  • a bypass switch of the prior art includes a double-break circuit breaker, the double-break circuit breaker includes two arc-extinguishing chambers, and two independent arc-breaking chambers are respectively connected with an independent shunt switch, and two shunt switches
  • the switch moving contact is connected with a switch pull rod, the switch pull rod is synchronous with the corresponding pull rod in the arc extinguishing chamber, and the same direction drive is assembled together, and the double broken circuit breaker is closed before the shunt switch, and is lagging behind the shunt switch, that is The arc extinguishing of the bypass switch is borne by the double-break circuit breaker.
  • the shunt switch shares a part of the rated current, which reduces the current flowing through the double-break circuit breaker and solves the problem that the bypass switch can withstand the rated current.
  • the problem However, the opening and closing speed of the dynamic and static contacts of the arc extinguishing chamber is slow, and the opening and closing time of the moving and static contacts of the arc extinguishing chamber is long, which is not conducive to arc extinguishing.
  • the breaking distance between the moving and static contacts in the arc extinguishing chamber is smaller than the breaking distance between the moving and static contacts of the shunt switch, so that the arc extinguishing chamber lags behind the opening of the shunt switch, that is, it is guaranteed to be extinguished.
  • the break distance of the shunt switch must be increased, which makes the axial size of the shunt switch larger.
  • a circuit breaker unit including
  • the main arc extinguishing chamber of the arc contact has a shunt switch connected in parallel with the main arc extinguishing chamber, and the shunt switch comprises a switch static contact and a switch moving contact that is linked with the arc moving contact through the linkage transmission mechanism, and the main arc extinguishing chamber is
  • the double-acting arc extinguishing chamber further comprises a follower arc contact which is connected with the moving arc contact through a transmission mechanism to be movable relative to the moving arc contact, and the moving arc contact and the follower arc contact The head is closed before the switch static contact and the switch moving contact are closed, and the arc contact and the follower arc contact are opened after the switch static contact and the switch moving contact are opened.
  • the moving arc contact and the switching moving contact move synchronously through the linkage transmission mechanism, and the breaking distance between the moving arc contact and the follower arc contact is not less than the breaking distance between the switching moving contact and the switching static contact.
  • the circuit breaker unit comprises a linkage shaft, and the main drive arm and the shunt drive arm are arranged at intervals on the linkage shaft, and the main drive arm is connected with the movable contact rod drive of the main arc extinguishing chamber, and the switch lever of the drive arm and the shunt switch is divided and driven.
  • the drive is connected.
  • the main arc extinguishing chamber and the shunt switch are arranged side by side, and a first conductive connecting plate is connected between one end of the main arc extinguishing chamber near the follower arc contact and one end of the corresponding shunt switch close to the switch static contact, and the main arc extinguishing chamber follows
  • the arc contact and the switch static contact of the corresponding shunt switch are electrically connected through the first conductive connecting plate
  • a second conductive connection is connected between one end of the main arc extinguishing chamber adjacent to the moving arc contact and one end of the corresponding shunt switch close to the switching moving contact
  • the connecting plate, the arcing contact of the main arc extinguishing chamber and the switching static contact of the corresponding shunt switch are electrically connected through the second conductive connecting plate.
  • a high voltage switch comprising one or at least two circuit breaker units connected in series, the circuit breaker unit comprising a main arc extinguishing chamber having a moving arc contact, and the main arc extinguishing chamber is connected in parallel
  • the shunt switch comprises a switch static contact and a switch moving contact that is linked with the arcuate contact through the linkage transmission mechanism
  • the main arc extinguishing chamber is a double-action arc extinguishing chamber
  • the main arc extinguishing chamber further comprises a transmission mechanism
  • the moving arc contact drive is connected with a follower arc contact capable of moving opposite to the moving arc contact, and the arcing contact and the follower arc contact are closed before the switching static contact and the switching moving contact are closed.
  • the arcing contact and the follower arc contact are closed after the switch static contact and the switch moving contact are closed.
  • the moving arc contact and the switching moving contact move synchronously through the linkage transmission mechanism, the moving arc contact and the follower
  • the fracture distance between the arc contacts is not less than the fracture distance between the switch moving contacts and the switch stationary contacts.
  • the circuit breaker unit comprises a linkage shaft, and the main drive arm and the shunt drive arm are arranged at intervals on the linkage shaft, and the main drive arm is connected with the main contact arc drive of the main arc extinguisher, and the switch pull rod drive of the split drive arm and the shunt switch Connected.
  • the main arc extinguishing chamber and the shunt switch are arranged side by side, and the first arc connecting chamber is connected to the first conductive connecting plate between the one end of the follower arc contact and the end of the shunt switch close to the switch static contact, and the main arc extinguishing chamber is followed by
  • the arc contact and the switch static contact of the corresponding shunt switch are electrically connected through the first conductive connecting plate, and a second conductive connection is connected between one end of the main arc extinguishing chamber adjacent to the moving arc contact and one end of the corresponding shunt switch close to the switching moving contact
  • the connecting plate, the arcing contact of the main arc extinguishing chamber and the switching static contact of the corresponding shunt switch are electrically connected through the second conductive connecting plate.
  • a wiring board is provided on each of the two first conductive connecting plates.
  • the main arc extinguishing chambers of the two circuit breaker units are coaxial and arranged opposite each other.
  • the triple gearbox includes a box body, and the box body passes through The left flange surface and the right flange surface of the left and right sides are respectively fixedly connected with the two main arc extinguishing chambers, and the two rotating shafts are assembled on the box body, and the two linkage shafts respectively transmit power to the two circuit breaker units.
  • the advantage of the embodiment of the invention is that the main arc extinguishing chamber is a double-action arc extinguishing chamber, and the moving arc contact and the follower arc contact move relative to each other when the closing is performed, and the arcing contact and the follower arc contact are opened during the opening.
  • the back movement of the head which speeds up the closing speed of the moving and following arcing contacts, shortens the switching time of the moving and following arcing contacts, and helps to improve the arc extinguishing capability of the main arc extinguishing chamber.
  • the main arc extinguishing chamber is a double acting arc extinguishing chamber
  • the closing speed of the main arc extinguishing chamber is greater than the closing speed of the shunt switch, and the breaking distance between the arc moving contact and the follower arc contact is not less than the switching movement.
  • the main arc extinguishing chamber can also be closed before the shunt switch, and the axial distance of the shunt switch is not increased while ensuring the fracture distance of the main arc extinguishing chamber.
  • FIG. 1 is a schematic structural view of an embodiment of a high voltage switch according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a triple box in an embodiment of a high voltage switch according to an embodiment of the present invention
  • FIG. 3 is a schematic structural view of an interior of a main arc extinguishing chamber in an embodiment of a high voltage switch according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a shunt switch in an embodiment of a high voltage switch according to an embodiment of the present invention
  • FIG. 5 is a schematic structural view of a crank arm box in an embodiment of a high voltage switch according to an embodiment of the present invention
  • FIG. 6 is a schematic structural view of another perspective view of the arm box in the embodiment of the high voltage switch according to the embodiment of the present invention.
  • the high-voltage switch comprises two circuit breaker units connected in series, the circuit breaker unit comprises a main arc extinguishing chamber 1, and the main arc extinguishing chamber 1 is connected with a shunt switch 2 in parallel, and the two main arc extinguishing chambers 1 are coaxial and arranged opposite to each other, the main extinguishing
  • the arc chamber 1 and the shunt switch 2 are arranged side by side, and the two shunt switches 2 are respectively located on the front and rear sides of the main arc extinguishing chamber 1.
  • the two main arc extinguishing chambers 1 have the same structure.
  • the main arc extinguishing chamber 1 is a double acting arc extinguishing chamber, and the double acting arc extinguishing chamber is a prior art, and the specific structure is as follows.
  • the main arc extinguishing chamber 1 includes an active contact, a main stationary contact, a moving arc contact 16 and a follower arc contact 19.
  • the main arc extinguishing chamber 1 further includes a pressure cylinder 17 fixed to the arcing contact 16, a nozzle 18 provided on the arcing contact 16, and a first sleeve 10.
  • the main arc extinguishing chamber 1 further includes a moving contact rod 15 connected to the moving arc contact 16 , and the follower arc contact 19 and the moving arc contact 16 are connected by a transmission mechanism.
  • the transmission mechanism includes a shift fork 20 rotatably coupled to the follower arc contact 19 and an interlocking lever 21 fixed to the spout 18 for driving the rotation of the fork 20.
  • One end of the follower arc contact 19 connected to the fork 20 is provided with a long hole 32 extending in the front-rear direction, and one end of the fork 20 connected to the follower arc contact 19 is movable in the long hole 32, and the fork 20 The other end is an open end, and the linkage rod 21 is provided with a driving pin 31 which is pushed and engaged with the open end of the fork 20.
  • 3 is a schematic view of the arc and follower arc contact when the arc is closed. When the arc and the follower arc contact are opened, the operating mechanism is actuated, and the moving contact rod 15 drives the arcing contact 16 to move to the right.
  • the pressure cylinder and the nozzle 18 drive the linkage rod 21 to move to the right, the driving pin on the linkage rod 21 pushes the fork 20 to rotate the fork 20 clockwise, and the fork 20 drives the follower arc contact 19 to the left to accelerate the point. brake.
  • the two shunt switches 2 have the same structure.
  • the shunt switch 2 includes a switch moving contact 22 and a switch stationary contact 23, and further includes a second sleeve 11 that is disposed outside the switch moving contact 22 and the switch stationary contact 23.
  • the switch moving contact 22 includes a contact portion for electrically inserting the switch static contact 23 and a sliding fit portion for guiding the sliding contact with the switch movable contact seat 24.
  • the contact portion and the sliding fit portion are an integral structure, such that It can reduce contact resistance and reduce contact thermal resistance.
  • the switch moving contact 22 is slidably guided in the switch moving contact seat 24.
  • the switch moving contact 22 is connected to the switch pull rod 14, and the end of the second sleeve 11 away from the switch static contact 23 is connected to the arm box 12 through a flange.
  • a first conductive connecting plate 27 is connected between the end of the main arc extinguishing chamber 1 adjacent to the follower arc contact 19 and the end of the corresponding shunt switch 2 adjacent to the switch stationary contact 23, and the follower arc contact 19 of the main arc extinguishing chamber 1
  • the switch static contact 23 of the corresponding shunt switch 2 is electrically connected through the first conductive connecting plate 27, and the main arc extinguishing chamber 1 is connected to the end of the arcing contact 16 and the end of the corresponding shunt switch 2 close to the switching movable contact 22.
  • a wiring board 28 is disposed on each of the two first conductive connecting plates 27.
  • a triple transmission box 3 is disposed between the two main arc extinguishing chambers 1, and the triple transmission box 3 includes a box body 4, and the box body 4
  • the left flange surface 25 and the right flange surface 26, which are disposed on the left and right sides, are fixedly connected to the two main arc extinguishing chambers 1, respectively.
  • the arcing contact of the arc extinguishing chamber 1 and the switching moving contact of the shunt switch 2 realize synchronous movement through the linkage transmission mechanism, and the linkage transmission mechanism includes two linkage shafts 5 which are rotatably mounted on the casing 4, and the two linkage shafts 5 are parallel And the interval is set.
  • the outer peripheral surface of the interlocking shaft 5 is provided with a casing 29, and the interlocking shaft 5 is a spline shaft, and the interlocking shaft 5 is rotatably fitted with the outer casing 29.
  • the main drive shaft 5 is provided with a main drive arm 6 that is drivingly connected to the movable contact rod 15 and a shunt drive arm 9 that is drivingly connected to the switch rod 14.
  • the main driving arm 6 is an L-shaped structure, one side of the L-shaped structure is connected to the operating mechanism through the first connecting rod 7, and the other side of the L-shaped structure is passed through the second connecting rod 8 and the corresponding dynamic contact in the main arc extinguishing chamber 1.
  • the head pull rods 15 are connected, one end of the second link 8 is hinged to the main drive arm 6 and the other end is hinged to the movable contact rod 15 in the corresponding main arc extinguishing chamber 1.
  • the split driving arm 9 is located in the arm box 12, and the split driving arm 9 is drivingly connected to the switch rod 14 through the third link 13.
  • One end of the third link 13 is hinged to the shunt drive arm 9 and the other end is connected to the switch.
  • the tie rod 14 is hinged.
  • the distance between the main drive arm 6 and the second link 8 hinged to the linkage shaft 5 is equal to the distance between the hinge point of the split drive arm 9 and the third link 13 to the linkage axis, and therefore, the main drive on the linkage shaft 5
  • the arm 6 and the shunt drive arm 9 respectively drive the movable contact rod 15 and the switch rod 14 to move, and the arcing contact of the main arc extinguishing chamber 1 and the switching moving contact of the shunt switch 2 move synchronously.
  • the main arc extinguishing chamber 1 bears the arc extinguishing function during the splitting and closing.
  • the shunt switch 2 mainly undertakes the throughflow function after the closing, and the arcing contact and the follower arc contact are combined in the switching static contact and the switching moving contact. Before closing the brake, the arcing contact and the follower arc contact are closed after the switch static contact and the switch moving contact are closed.
  • the opening and closing speed of the main arc extinguishing chamber 1 is required to be high, and the main arc extinguishing chamber 1 adopts the moving and following arcing contacts in the opening and closing A double-acting form that moves in the opposite direction to achieve fast opening and closing to reduce arc generation time.
  • the main arc extinguishing chamber 1 adopts the double-acting arc extinguishing chamber, and the opening and closing speed of the moving arc contact of the main arc extinguishing chamber 1 is greater than the opening and closing speed of the shunt switch 2.
  • the distance between the arc contact and the follower arc contact is L1
  • the break distance between the switch moving contact and the switch static contact is L2
  • L1 is not less than L2
  • the fracture distance between the contacts is equal to or greater than the fracture distance between the switch moving contact and the switch static contact.
  • the closing speed of the arc extinguishing chamber 1 and the closing speed of the shunt switch are such that the main arc extinguishing chamber is closed before the shunt switch 2 and lags behind the shunt switch 2.
  • the flow capacity of the high voltage switch has been greatly improved. If the rated current capacity of a high-voltage switch is 8000A, the temperature rise test load current is 8000A. If the high voltage switch in the embodiment of the present invention is used, the ideal shunting relationship is the main arc extinguishing chamber 3600A and the shunt switch 4000A. The measured value of the contact resistance of each contact point of the circuit breaker is measured. The contact resistance of the moving contact in the main arc extinguishing chamber is 6 ⁇ , and the switching moving contact of the shunt switch is an integrated structure, which not only reduces the contact resistance but also greatly reduces the contact resistance. Contact thermal resistance.
  • the measured value of the main arc extinguishing chamber is 43 ⁇ , and the resistance of the shunt switch is not more than 35 ⁇ . Since the shunt switch resistance value is smaller than the resistance value of the main arc extinguishing chamber, and the two are in parallel relationship, the current divided by the shunt switch will be greater than 1/2 of the total current, that is, greater than 4000A, and the shunt switch is designed according to the flow capacity 4400A. The flow capacity requirement can be met; the main interrupter shunt will be less than 4000A.
  • the high-voltage switch has more significant advantages in terms of weight reduction and miniaturization.
  • the shunt switch is connected in parallel on the main arc extinguishing chamber, which does not change the structure of the main arc extinguishing chamber, and the shunt switch has a small volume and requires small operation work.
  • the shunt switch and the main arc extinguishing chamber adopt the same operating mechanism, and the original operation is performed.
  • the mechanism can meet the requirements, and the operating mechanism does not need to be changed to a large volume and a high operating power. Products have more significant advantages in cost, transportation, installation, maintenance, overhaul, etc., and enhance product market competitiveness.
  • the double-acting main arc extinguishing chamber can greatly reduce the operating work.
  • the reverse movement of the arc and the follower arc contact makes the breaking speed of the fracture equal to the sum of the moving speeds of the moving arc and the follower arc contact, so the original score can be satisfied.
  • the speed of the moving arc contact can be greatly reduced in the case of the brake speed. Because kinetic energy is proportional to the square of the velocity, when the speed of motion is reduced by half, the kinetic energy will be reduced by three-quarters. In theory, the operating power can be reduced by three-quarters. However, due to auxiliary pressure, frictional resistance, transmission mechanism quality and other factors, the operating work can be reduced by about 65%.
  • the double-acting main arc extinguishing chamber is adopted, and the breaking capacity of the main arc extinguishing chamber is enhanced.
  • the domestic 110kV product has a speed of only about 7m/s.
  • the double-acting arc extinguishing chamber can make the speed of the sub-division reach 10m/s or more on the basis of almost no increase in operating work. The breaking of the large current is ensured, and the incision current is ensured without heavy breakdown.
  • the number of circuit breaker units is only one or more than two.
  • the linkage transmission mechanism includes a moving shaft, and the main drive connecting plate and the shunt driving connecting plate are hingedly connected on the moving shaft, and the other end of the main driving connecting plate and the main arc extinguishing chamber are moved.
  • the contact pull rod is hinged, and the other end of the split drive connecting plate is hinged with the switch pull rod of the shunt switch, and the linear motion of the moving contact rod and the switch rod is driven by the linear motion of the moving shaft, and the hinge point of the main driving connecting plate and the moving shaft.
  • the distance from the hinge point of the main drive connecting plate and the moving contact tie rod and the hinge point of the split driving connecting plate and the moving shaft to the hinge point of the split driving connecting plate and the splitting pull rod are equal, and the moving contact is realized by the linkage transmission mechanism Synchronous movement of the pull rod 15 and the switch rod 14.
  • the moving arc contact of the main arc extinguishing chamber and the switching moving contact of the shunt switch are interlocking movements that are not synchronized.
  • the distance between the main drive arm 6 and the second link 8 hinged to the linkage shaft 5 is not equal to the distance between the hinge drive arm 9 and the third link 13 to the linkage axis;
  • the mechanism comprises a moving shaft, the main driving connecting plate and the shunt driving connecting plate are hingedly connected on the moving shaft, and the other end of the main driving connecting plate is hinged with the moving contact pull rod of the main arc extinguishing chamber, and the other end of the shunt driving connecting plate and the shunting
  • the switch lever of the switch is hinged, and the linear motion of the moving contact rod and the switch rod is driven by the linear motion of the moving shaft, and the distance between the hinge point of the main driving connecting plate and the moving shaft to the hinge point of the main driving connecting plate and the moving contact lever And the distance between
  • the fracture distance between the movable arc contact 16 and the follower arc contact 19 is smaller than the fracture distance between the switch moving contact 22 and the switch static contact 23.
  • the structure of the embodiment of the circuit breaker unit in the embodiment of the present invention is the same as the structure of the circuit breaker unit in the embodiment of the high-voltage switch, and will not be further described herein.
  • the high voltage switch of the embodiment of the invention comprises one or at least two circuit breaker units connected in series, the circuit breaker unit comprises a main arc extinguishing chamber with a moving arc contact, a shunt switch is connected in parallel on the main arc extinguishing chamber, and the shunt switch comprises a switch static
  • the contact and the movable contact with the arc-moving contact are linked by the linkage transmission mechanism, and the main arc-extinguishing chamber is a double-action arc extinguishing chamber, and the main arc extinguishing chamber further comprises a transmission connection with the movable arc contact through the transmission mechanism to
  • the arcing contact of the moving arc contact relative to the opposite phase, the arcing contact and the follower arc contact are closed before the switching static contact and the switching moving contact are closed, the arcing contact and the follower arc
  • the contacts are closed after the switch static contacts and the switch moving contacts are closed.
  • the moving arc contact and the follower arc contact move relative to each other when the closing is performed, and the moving arc contact and the follower arc contact are opposite when the opening is performed. Movement, which speeds up the closing and closing speed of the moving and following arcing contacts, shortens the switching time of the moving and following arcing contacts, and helps to improve the arc extinguishing capability of the main arc extinguishing chamber.

Abstract

La présente invention porte sur un commutateur haute tension et sur une unité coupe-circuit associée. Le commutateur haute tension comporte une ou au moins deux unités coupe-circuit raccordées en série; l'unité coupe-circuit comprend une chambre principale d'extinction d'arc (1) ayant un contact d'arc dynamique (16); un commutateur de dérivation (2) est raccordé en parallèle à la chambre principale d'extinction d'arc (1); le commutateur de dérivation (2) comprend un contact de commutateur statique (23) et un contact de commutateur dynamique (22) coopérant avec le contact d'arc dynamique (16); la chambre principale d'extinction d'arc (1) est une chambre d'extinction d'arc à double effet; la chambre principale d'extinction d'arc (1) comprend en outre un contact d'arc de suivi (19) qui est en liaison d'entraînement avec le contact d'arc dynamique (16) par le biais d'un mécanisme d'entraînement de sorte à pouvoir se rapprocher et s'éloigner du contact d'arc dynamique (16); le contact d'arc dynamique (16) et le contact d'arc de suivi (19) sont réalisés avant que le contact de commutateur statique (23) et le contact de commutateur dynamique (22) ne soient réalisés; et le contact d'arc dynamique (16) ainsi que le contact d'arc de suivi (19) sont réalisés après que le contact de commutateur statique (23) et le contact de commutateur dynamique (22) sont réalisés.
PCT/CN2016/107286 2016-05-05 2016-11-25 Commutateur haute tension et unité coupe-circuit associée WO2017190490A1 (fr)

Applications Claiming Priority (2)

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CN201610291632.7A CN105869945B (zh) 2016-05-05 2016-05-05 一种高压开关及其断路器单元
CN201610291632.7 2016-05-05

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CN108807063A (zh) * 2018-06-01 2018-11-13 河南华盛隆源电气有限公司 一种开关柜及其三相接地开关
CN109346375A (zh) * 2018-10-23 2019-02-15 深圳市英豪电力科技有限公司 一种断路器开关
CN109346368A (zh) * 2018-11-28 2019-02-15 许继（厦门）智能电力设备股份有限公司 一种闸刀式隔离开关的触头结构
CN114068238A (zh) * 2021-12-29 2022-02-18 山东大学 一种断路器传动机构、断路器及环保充气柜

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CN105869945B (zh) * 2016-05-05 2019-01-22 平高集团有限公司 一种高压开关及其断路器单元
DE102017206746A1 (de) * 2017-04-21 2018-10-25 Siemens Aktiengesellschaft Anordnung und Verfahren zum parallelen Schalten hoher Ströme in der Hochspannungstechnik
CN109786175A (zh) * 2018-12-26 2019-05-21 中国南方电网有限责任公司超高压输电公司检修试验中心 一种内部可视的瓷柱式断路器动态缩微模型
CN110571092A (zh) * 2019-11-01 2019-12-13 江苏省如高高压电器有限公司 一种新型复合式高压组合电器
CN112509857B (zh) * 2020-09-25 2023-04-07 平高集团有限公司 一种组合型高压直流旁路开关

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