WO2011086699A1 - 真空バルブ - Google Patents

真空バルブ Download PDF

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Publication number
WO2011086699A1
WO2011086699A1 PCT/JP2010/050496 JP2010050496W WO2011086699A1 WO 2011086699 A1 WO2011086699 A1 WO 2011086699A1 JP 2010050496 W JP2010050496 W JP 2010050496W WO 2011086699 A1 WO2011086699 A1 WO 2011086699A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
coil
coil electrode
outer peripheral
peripheral coil
Prior art date
Application number
PCT/JP2010/050496
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
将司 川田
孝行 糸谷
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to KR1020127013429A priority Critical patent/KR101401201B1/ko
Priority to JP2011549832A priority patent/JP5281171B2/ja
Priority to DE112010005149.6T priority patent/DE112010005149B4/de
Priority to PCT/JP2010/050496 priority patent/WO2011086699A1/ja
Priority to CN201080061307.2A priority patent/CN102754175B/zh
Priority to TW099111366A priority patent/TWI405921B/zh
Publication of WO2011086699A1 publication Critical patent/WO2011086699A1/ja

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Classifications

    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings

Definitions

  • the present invention relates to a vacuum valve with improved breaking performance having an open / close contact used in a vacuum circuit breaker.
  • a vacuum valve is made of an insulating material such as ceramic or glass, and is a cylindrical vacuum vessel that is kept airtight in a high vacuum, and a pair of electrodes that can be connected to and separated from each other at both ends of the vacuum vessel. And a cylindrical arc shield provided in the vacuum vessel so as to surround these electrodes.
  • the vacuum valve serves to extinguish an arc generated between the electrodes when the current is cut off when the current is interrupted.
  • a slit is formed in a direction that intersects the circumferential direction of the arc electrode at a predetermined angle.
  • An insulative fitting body is fitted into the. This increases the insulation recovery voltage and raises the rated voltage.
  • an insulating wide portion larger than the slit width is formed on the coil electrode side of the fitting body, so that the fitting body is difficult to come off from the arc electrode, and mechanical reliability is improved.
  • a cup-shaped slit electrode is used to obliquely cross the axial direction of the current-carrying shaft on the outer peripheral side surface. A plurality of slits are formed. Even when the distance between the electrodes is increased, a high vertical magnetic field can be generated, and the interruption performance is improved.
  • the coil is provided only on the outer peripheral portion of the arc electrode or the contact (corresponding to a contact in the present application, hereinafter referred to as a contact), and the generated magnetic field is not necessarily provided.
  • the arc is not uniformly formed over the entire contact, and the generated arc is not sufficiently distributed over the entire contact, thus limiting the breaking performance.
  • the present invention has been made to solve the above-described problems, and provides a vacuum valve that can improve the homogeneity of a magnetic field generated at the time of opening a contact and improve the breaking performance.
  • the purpose is that.
  • a vacuum valve according to the present invention includes a pair of detachable contacts housed in a vacuum container held in a vacuum and different outer diameters concentrically arranged to connect to the contacts.
  • a plurality of cup-shaped coil electrodes and an electrode rod for fixing and energizing the plurality of coil electrodes are provided.
  • the coil is provided not only on the outer periphery of the contact but also on the inner periphery, thereby improving the uniformity of the magnetic field, thereby dispersing the generated arc over the entire contact and improving the breaking performance. It has a remarkable effect that it can be used.
  • FIG. 3 is a side view of a movable electrode and a fixed electrode of the vacuum valve in Embodiment 1.
  • FIG. 3 is a structural diagram of a movable electrode in Embodiment 1.
  • FIG. 3 is a distribution diagram of a magnetic field in a circumferential direction generated by the composite coil electrode in the first embodiment.
  • 5 is a diagram illustrating a method for manufacturing a composite coil electrode according to Embodiment 1 by a press working method.
  • FIG. 6 is a structural diagram of a movable electrode in Embodiment 2.
  • FIG. 10 is a diagram illustrating a method for manufacturing a composite coil electrode according to a second embodiment by a press working method. 6 is a structural diagram of a movable electrode in Embodiment 3.
  • FIG. 10 is a distribution diagram of a radial magnetic field generated by a composite coil electrode in the third embodiment. It is a top view of the coil electrode when the number of branches of the plurality of coil electrodes in the first embodiment and the third embodiment is different.
  • FIG. 4 is a top view of the coil electrode when the positions of the coil portions of the plurality of coil electrodes in the first embodiment are the same in the circumferential direction.
  • FIG. 1 is a side view of a movable electrode and a fixed electrode of a vacuum valve according to Embodiment 1.
  • FIG. 2A and 2B are structural views of the movable electrode
  • FIG. 2A is an exploded perspective view of the movable electrode
  • FIG. 2B is a top view of the coil electrode.
  • FIG. 3 is a diagram showing a circumferential magnetic field distribution generated by the coil electrode.
  • the vacuum valve is composed of a pair of a movable electrode 1 and a fixed electrode 11 housed in a vacuum container held in a vacuum, but has the same structure, and here, the movable electrode Only the structure 1 will be described.
  • FIG. 1 is a side view of a movable electrode and a fixed electrode of a vacuum valve according to Embodiment 1.
  • FIG. 2A and 2B are structural views of the movable electrode
  • FIG. 2A is an exploded perspective view of the movable electrode
  • FIG. 2B is a top view of the coil electrode.
  • reference numeral 1 denotes a movable electrode, a contact 2, concentrically arranged cup-shaped outer peripheral coil electrode 3 and inner peripheral coil electrode 4, and outer peripheral coil electrode 3 and inner peripheral coil connected to the contact 2.
  • An electrode rod 5 connected to the electrode 4 and for taking out current out of a vacuum vessel (not shown), a reinforcing member 6 for reinforcing the contact 2, and an outer coil electrode 3 and an inner coil electrode 4 are inserted to insulate. Insulating ring 7 is used.
  • the outer peripheral coil electrode 3 is divided by a slit 3b provided on the cup-shaped side surface 3a in parallel to the axial direction 1a of the movable electrode 1, and is connected to a spoke portion 3c branched from the cup-shaped bottom portion toward the outer periphery.
  • a coil portion 3d having an arcuate current path formed in the circumferential direction, a terminal portion 3e connected to the contact 2, and a fitting hole 3f fitted and fixed to the fitting portion 5a of the electrode rod 5.
  • the inner peripheral coil electrode 4 is divided by a slit 4b provided on the cup-shaped side surface 4a in parallel with the axial direction 1a, and the spoke is branched from the cup-shaped bottom portion toward the outer periphery.
  • the coil part 4d in which a circular arc-shaped energization path is formed in the circumferential direction connected to the part 3c, the terminal part 4e connected to the contact 2, and the fitting part 5b of the electrode bar 5 are fitted and fixedly fitted. It is comprised from the hole 4f.
  • the fitting hole diameters 3f and 4f of the plurality of outer peripheral coil electrodes 3 and inner peripheral coil electrodes 4 are sequentially changed, and the outer diameters of the corresponding fitting portions 5a and 5b of the corresponding electrode rod 5 are also changed in order. Therefore, the outer peripheral coil electrode 3 and the inner peripheral coil electrode 4 can be fixed at predetermined positions.
  • the position of the coil portion 3d that is the energization path of the outer peripheral coil electrode 3 and the position of the coil portion 4d that is the energization path of the inner peripheral coil electrode 4 are arranged to be different positions in the circumferential direction. .
  • the reinforcing member 6 is fitted and fixed by the fitting hole 5c of the electrode bar 5 and the protruding portion 6a, contacts the back surface of the contact 2, and supports and reinforces the contact 2 from the back.
  • the contact 2, the outer peripheral coil electrode 3 and the inner peripheral coil electrode 4, and the electrode bar 5 are made of a copper-based material having a low electric resistance, and the reinforcing material 6 is made of a stainless steel metal or an insulator having a high electric resistance. ing.
  • the vacuum valve of the first embodiment normally, when energized, the current flows from the electrode rod 15 of the fixed electrode 11 through the outer peripheral coil electrode 13 and the inner peripheral coil electrode 14 and the contact 12 to the contact 2 of the movable electrode 1. From the outer peripheral coil electrode 3 and the inner peripheral coil electrode 4 to the electrode rod 5. When the movable electrode 1 is moved backward to interrupt the current, the contact 2 of the movable electrode 1 is separated from the contact 12 of the fixed electrode 11, and an arc is generated between the contact 2 and the contact 12.
  • the electric current due to the arc flows in the radial direction through the contact 2 and then flows from the terminal portion 3e and the terminal portion 4e to the outer peripheral coil electrode 3, the coil portion 3d and the coil portion 4d of the inner peripheral coil electrode 4, and the spoke portion 3c and the spoke portion. It flows to the electrode rod 5 through 4c.
  • the coil portion 3d and the coil portion 4d are formed in an arc shape and a current flows in the circumferential direction, a longitudinal magnetic field parallel to the axial direction 1a of the movable electrode 1 is generated.
  • the insulating ring 7 is inserted to avoid disturbing the magnetic field distribution due to the contact between the coil portion 3d and the coil portion 4d of the outer peripheral coil electrode 3 and the inner peripheral coil electrode 4.
  • FIG. 3 shows a comparison of the circumferential magnetic field distribution generated by the coil electrode with the conventional example.
  • the magnetic flux density B is measured along the direction L of the arrow in FIG. 2B.
  • T is a conventional coil electrode
  • C is the outer coil electrode 3 of the first embodiment. This is due to the composite coil electrode with the inner peripheral coil electrode 4. Since the position of the terminal portion 3e of the outer peripheral coil electrode 3 and the position of the terminal portion 4e of the inner peripheral coil electrode 4 are different from each other in the circumferential direction L, the magnetic field generated by the composite coil electrode Compared to the case of a single coil electrode, the magnetic field distribution in the circumferential direction is greatly improved and the uniformity is improved. As a result, the arc is converged within the range of the contact and diffused throughout the contact 2. This prevents local concentration and protects the contacts 2 from damage.
  • the insulating ring 7 can be omitted by providing a gap between the outer peripheral coil electrode 3 and the inner peripheral coil electrode 4.
  • an insulating film may be coated on the cup-shaped outer surface of the inner peripheral coil electrode or the cup-shaped inner surface of the outer peripheral coil electrode. For example, even if the coil electrodes come into contact with each other, the magnetic field uniformity is reduced, but the effect is exhibited.
  • the movable electrode 1 and the fixed electrode 11 are configured by a combination of a plurality of coil electrodes, and the thickness of each coil electrode may be thin.
  • a method by press working is effective.
  • FIG. 4 shows a method for manufacturing a coil electrode by a press working method. First, a portion other than the fitting hole 3f and the coil portion 3d is punched from the flat plate 10 (FIG. 4A) (FIG. 4B), and then the side surface 3a is formed by drawing. And processed into a cup shape (FIG. 4C). Furthermore, the target composite coil electrode is manufactured by combining the coil electrodes 3 and 4 having different outer diameters (FIG. 4D).
  • the case where the coil part 3d and the coil part 4d of the outer periphery coil electrode 3 and the inner periphery coil electrode 4 are the same positions in the circumferential direction is shown.
  • the insulating ring 7 is not shown, but is inserted as necessary.
  • a composite coil electrode can be manufactured at low cost by combining a plurality of coils.
  • a plurality of cup-shaped cups having different outer diameters in which a slit is provided in parallel with the axial direction on the cup-shaped side surface and an arc-shaped current path is formed in the circumferential direction.
  • FIG. FIG. 5 is an exploded perspective view showing the structure of the movable electrode of the vacuum valve in the second embodiment.
  • reference numeral 21 denotes a movable electrode, a contact 22, a cup-shaped outer peripheral coil electrode 23 and an inner peripheral coil electrode 24 that are concentrically connected to the contact 22, an outer peripheral coil electrode 23 and an inner peripheral coil.
  • An electrode rod 25 connected to the electrode 24 and drawn out of the vacuum vessel (not shown), a reinforcing material 26 for reinforcing the contact 22, and an insulation inserted to insulate the outer peripheral coil electrode 23 and the inner peripheral coil electrode 24 It is composed of a ring 27.
  • the outer peripheral coil electrode 23 includes a coil portion 23d in which an arc-shaped energization path is formed in the circumferential direction by a slit 23b provided obliquely to the cup-shaped side surface 23a with respect to the axial direction 21a of the movable electrode 21, and a contact 22 And a fitting hole 23f fitted and fixed to the fitting portion 25a of the electrode rod 25.
  • the inner peripheral coil electrode 24 has a coil portion 24d in which an arc-shaped energization path is formed in the circumferential direction by a slit 24b provided obliquely with respect to the axial direction 21a on the cup-shaped side surface 24a. And a terminal portion 24e connected to the contact 22 and a fitting hole 24f fitted and fixed to the fitting portion 25b of the electrode rod 25.
  • the position of the coil portion 23d that is the energization path of the outer peripheral coil electrode 23 and the position of the coil portion 24d that is the energization path of the inner peripheral coil electrode 24 are arranged at different angles in the circumferential direction. .
  • the reinforcing member 26 is fitted and fixed by the fitting hole 25c of the electrode rod 25 and the protruding portion 26a, contacts the back surface of the contact 22, and supports and reinforces the contact 22 from the back.
  • the contact 22, the outer peripheral coil electrode 23 and the inner peripheral coil electrode 24, and the electrode rod 25 are made of a copper-based material having a low electrical resistance
  • the reinforcing material 26 is a stainless steel metal having a high electrical resistance. And is composed of an insulator.
  • the operation of the vacuum valve in the second embodiment will be described with reference to FIG.
  • the movable electrode 21 when the movable electrode 21 is retracted and the current is interrupted, the movable electrode 21 is separated from the fixed electrode (not shown), and between the contact 22 and the contact of the fixed electrode. An arc is generated.
  • the current due to the arc flows in the radial direction through the contact 22 and then flows from the terminal portions 23e and 24e to the outer coil electrode 23, the coil portion 23d and the coil portion 24d of the inner coil electrode 24, and the outer coil electrode 23 and the inner coil. It flows to the electrode rod 25 through the bottom of the electrode 24.
  • the side surface 23a of the cup-shaped outer peripheral coil electrode 23 and the inner peripheral coil electrode 24, the slit 23b provided obliquely on the side surface 24a, and the coil portion 23d and the coil portion 24d formed by the slit 24b are formed in an arc shape. Since the current flows obliquely along the circumferential direction, a longitudinal magnetic field parallel to the axial direction 21a of the electrode rod 25 is generated.
  • the position of the coil portion 23d of the outer peripheral coil electrode 23 and the position of the coil portion 24d of the inner peripheral coil electrode 24 are arranged to be different positions in the circumferential direction, a magnetic field generated by a plurality of coil electrodes Compared to the case of a single coil electrode, the magnetic field distribution in the circumferential direction is improved and the uniformity is improved. As a result, the arc is converged within the range of the contact and diffused throughout the contact 22. Prevents local concentration and protects the contacts 22 from damage.
  • FIG. 6 shows a method for manufacturing a coil electrode by press working.
  • the fitting hole 23f and the slit 23b are punched from the flat plate 10 (FIG. 6A) (FIG. 6B), and then the side surface 23a is formed by drawing to form a cup shape. (FIG. 6C).
  • the target composite coil electrode is manufactured by combining the coil electrode 22 and the coil electrode 23 having different outer diameters (FIG. 6D).
  • the insulating ring 27 is inserted as necessary.
  • the cup-shaped side surface is provided with the slits obliquely with respect to the axial direction, and the arc-shaped energization paths are formed in the circumferential direction.
  • the coil electrodes are arranged concentrically, and a magnetic field is generated by a plurality of coil electrodes, so that the uniformity of the magnetic field distribution in the circumferential direction generated when the arc is generated can be improved as in the first embodiment. Has a remarkable effect of preventing local concentration of the material, protecting the contact from damage, and improving the breaking performance.
  • FIG. 7 is a structural diagram of the movable electrode
  • FIG. 7 (a) is an exploded perspective view of the movable electrode
  • FIG. 7 (b) is a top view of the coil electrode.
  • FIG. 8 is a diagram showing a radial magnetic field distribution generated by the coil electrode.
  • a gap d is provided between the cup-shaped outer peripheral coil electrode 3 and the inner peripheral coil electrode 4 arranged concentrically and the insulating ring 7. Since this is the same as FIG. 1 of the first embodiment except that is omitted, description of other components is omitted.
  • the position of the coil portion 3d that is the energization path of the outer peripheral coil electrode 3 and the position of the coil portion 4d that is the energization path of the inner peripheral coil electrode 4 are arranged to be different positions in the circumferential direction. .
  • the operation of the vacuum valve in the third embodiment will be described with reference to FIG.
  • the contact 2 of the movable electrode 1 is separated from the contact 12 of the fixed electrode 1, and the contact between the contact 2 and the contact 12.
  • An arc is generated.
  • the electric current due to the arc flows in the radial direction through the contact 2 and then flows from the terminal portion 3e and the terminal portion 4e to the outer peripheral coil electrode 3, the coil portion 3d and the coil portion 4d of the inner peripheral coil electrode 4, and the spoke portion 3c and the spoke portion. It flows to the electrode rod 5 through 4c.
  • the coil portion 3d and the coil portion 4d are formed in an arc shape, and a current flows in the circumferential direction, so that a longitudinal magnetic field parallel to the axial direction 1a is generated.
  • FIG. 8 shows a comparison of the magnetic field distribution in the circumferential direction generated by the composite coil electrode in the third embodiment with a conventional example.
  • the magnetic flux density B is measured along the radial direction R of the arrow in FIG. 7B
  • T is the conventional coil electrode
  • C is the outer peripheral coil electrode 3 and the inner peripheral coil of the third embodiment. This is due to the composite coil electrode with the electrode 4. Since the inner peripheral coil electrode 4 having a smaller outer diameter with respect to the outer peripheral coil electrode 3 is disposed with a gap d, the magnetic field generated by the composite coil electrode has a diameter larger than that of a single coil electrode. As a result of improved directional magnetic field distribution and more uniformity, the arc is converged within the range of the contact and diffused throughout the contact 2 to prevent local concentration, 2 can be protected from damage.
  • a gap is provided between a plurality of cup-shaped coil electrodes having different outer diameters, each of which has an arcuate current path formed in the circumferential direction, and is arranged concentrically. This can improve the uniformity of the radial magnetic field distribution generated when an arc occurs, prevent the arc from concentrating locally, protect the contacts from damage, and improve the breaking performance. There is a remarkable effect of being able to.
  • each coil electrode plate may be different.
  • FIG. 9A shows another implementation corresponding to the first embodiment
  • FIG. 9B shows another implementation corresponding to the third embodiment in which the number of branches of the coil electrodes is different.
  • it is effective for improving the uniformity of the magnetic field when the number of branches of the outer peripheral coil electrode is larger than the number of branches of the inner peripheral coil electrode.
  • vacuum valves with various allowable load currents by preparing coil electrodes with different allowable load currents and combining them.

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  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
PCT/JP2010/050496 2010-01-18 2010-01-18 真空バルブ WO2011086699A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1020127013429A KR101401201B1 (ko) 2010-01-18 2010-01-18 진공밸브
JP2011549832A JP5281171B2 (ja) 2010-01-18 2010-01-18 真空バルブ
DE112010005149.6T DE112010005149B4 (de) 2010-01-18 2010-01-18 Vakuum-schalter
PCT/JP2010/050496 WO2011086699A1 (ja) 2010-01-18 2010-01-18 真空バルブ
CN201080061307.2A CN102754175B (zh) 2010-01-18 2010-01-18 真空阀
TW099111366A TWI405921B (zh) 2010-01-18 2010-04-13 真空閥

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/050496 WO2011086699A1 (ja) 2010-01-18 2010-01-18 真空バルブ

Publications (1)

Publication Number Publication Date
WO2011086699A1 true WO2011086699A1 (ja) 2011-07-21

Family

ID=44304002

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/050496 WO2011086699A1 (ja) 2010-01-18 2010-01-18 真空バルブ

Country Status (6)

Country Link
JP (1) JP5281171B2 (zh)
KR (1) KR101401201B1 (zh)
CN (1) CN102754175B (zh)
DE (1) DE112010005149B4 (zh)
TW (1) TWI405921B (zh)
WO (1) WO2011086699A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015082412A (ja) * 2013-10-23 2015-04-27 三菱電機株式会社 真空バルブ
CN111192777A (zh) * 2020-01-21 2020-05-22 上海电机学院 一种防电弧触头

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104701065B (zh) * 2013-12-04 2017-02-15 沈阳工业大学 非对称线圈式旋磁真空灭弧室触头系统
JP6268031B2 (ja) * 2014-04-17 2018-01-24 株式会社東芝 真空バルブ
DE102015202867A1 (de) * 2015-02-18 2016-08-18 Siemens Aktiengesellschaft Kontaktvorrichtung für einen Vakuum-Leistungsschalter
CN111668064B (zh) * 2019-03-05 2022-08-30 平高集团有限公司 真空灭弧室触头、真空灭弧室和真空断路器
CN111668063B (zh) * 2019-03-05 2022-04-12 平高集团有限公司 一种真空灭弧室及其触头结构
CN111261447A (zh) * 2020-01-20 2020-06-09 北京京东方真空电器有限责任公司 一种真空灭弧室触头、真空灭弧室及真空断路器

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JPH06103859A (ja) * 1992-09-18 1994-04-15 Toshiba Corp 真空バルブ
JPH11120873A (ja) * 1997-10-13 1999-04-30 Shibafu Engineering Kk 真空バルブ
WO2001041173A1 (de) * 1999-11-27 2001-06-07 Moeller Gmbh Kontaktanordnung für eine vakuumschaltkammer

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DE3009925C2 (de) * 1980-03-14 1984-03-08 Siemens AG, 1000 Berlin und 8000 München Kontaktstück für einen elektrischen Vakuumschalter
CN85202098U (zh) * 1985-06-07 1986-04-23 西安高压电器研究所 一种用于真空断路器的纵磁场触头
US4839481A (en) * 1988-02-16 1989-06-13 Cooper Industries, Inc. Vacuum interrupter
JPH05312662A (ja) * 1991-04-09 1993-11-22 Hamamatsu Koden Kk 静電容量式圧力センサ
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JPS5879927U (ja) * 1981-11-26 1983-05-30 株式会社東芝 真空バルブ
JPH06103859A (ja) * 1992-09-18 1994-04-15 Toshiba Corp 真空バルブ
JPH11120873A (ja) * 1997-10-13 1999-04-30 Shibafu Engineering Kk 真空バルブ
WO2001041173A1 (de) * 1999-11-27 2001-06-07 Moeller Gmbh Kontaktanordnung für eine vakuumschaltkammer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015082412A (ja) * 2013-10-23 2015-04-27 三菱電機株式会社 真空バルブ
CN111192777A (zh) * 2020-01-21 2020-05-22 上海电机学院 一种防电弧触头

Also Published As

Publication number Publication date
TW201126086A (en) 2011-08-01
TWI405921B (zh) 2013-08-21
JPWO2011086699A1 (ja) 2013-05-16
DE112010005149T5 (de) 2012-10-25
KR20120079154A (ko) 2012-07-11
JP5281171B2 (ja) 2013-09-04
KR101401201B1 (ko) 2014-05-28
CN102754175A (zh) 2012-10-24
DE112010005149B4 (de) 2018-03-08
CN102754175B (zh) 2014-11-05

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