EP1675145A1 - Disjoncteur à haute puissance avec joint contre les gaz d'arc - Google Patents

Disjoncteur à haute puissance avec joint contre les gaz d'arc Download PDF

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Publication number
EP1675145A1
EP1675145A1 EP04405797A EP04405797A EP1675145A1 EP 1675145 A1 EP1675145 A1 EP 1675145A1 EP 04405797 A EP04405797 A EP 04405797A EP 04405797 A EP04405797 A EP 04405797A EP 1675145 A1 EP1675145 A1 EP 1675145A1
Authority
EP
European Patent Office
Prior art keywords
gas flow
hot gas
flow
circuit breaker
partial
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.)
Withdrawn
Application number
EP04405797A
Other languages
German (de)
English (en)
Inventor
David Saxl
Stephan Grob
Markus Vestner
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.)
ABB Technology AG
Original Assignee
ABB Technology AG
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 ABB Technology AG filed Critical ABB Technology AG
Priority to EP04405797A priority Critical patent/EP1675145A1/fr
Priority to EP05812904A priority patent/EP1829076B1/fr
Priority to AT05812904T priority patent/ATE400885T1/de
Priority to JP2007547140A priority patent/JP2008525946A/ja
Priority to DE502005004684T priority patent/DE502005004684D1/de
Priority to CN200580044563XA priority patent/CN101088135B/zh
Priority to PCT/CH2005/000750 priority patent/WO2006066429A1/fr
Publication of EP1675145A1 publication Critical patent/EP1675145A1/fr
Priority to US11/812,729 priority patent/US7732727B2/en
Withdrawn legal-status Critical Current

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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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H2033/888—Deflection of hot gasses and arcing products

Definitions

  • the invention relates to the field of high voltage switch technology. It relates to a high power switch and a method for protecting a hot gas and / or gas pressure sensitive element of a high power switch from a hot gas flow according to the preamble of the independent claims.
  • Arc-extinguishing high-power switches are known from the prior art.
  • a flow of gas heated by the arc quenching gas, typically SF 6
  • Such hot gas flow can create significant pressures and, if it encounters a hot gas and / or gas sensitive element that may be present in the high power switch, can damage or destroy such. Damage or destruction of a such element can lead to malfunction of the high-power switch to failure.
  • the high-performance switch according to the invention in which a hot gas flow can form as a result of an electric arc burning during a switching operation, has a hot-gas and / or gas pressure-sensitive element and is characterized in that a seal is provided to protect the element from the hot gas flow.
  • the hot gas flow can be reduced in pressure and / or temperature, so that the element is protected from damage by the hot gas flow.
  • Pressures and temperatures that are present in hot gas flows may be greater than 10 bar and greater than 20 bar or above 1500 K and above 2000 K.
  • the seal is a movable non-contact seal. This makes it possible to protect elements that interact with moving parts of the high power switch.
  • the seal has a partial flow generating means for generating a partial hot gas flow of the hot gas flow and, downstream of this, a mass flow reducing agent for reducing the mass flow of the partial hot gas flow and an expansion means for volume expansion of the partial hot gas flow.
  • Such a seal has the advantage that the mass flow reducing agent can produce a reduced pressure compared with the pressure of the hot gas flow, resulting in a reduced pressure loading of the element, and the expander can reduce the temperature of the partial hot gas flow relative to the temperature of the hot gas flow become. Due to the interaction of the parts of the seal a very effective cooling and pressure reduction is achieved, so that a very effective protection of the element is achieved from damage by the hot gas flow.
  • the gas flow to which the element is exposed is of lower pressure and lower temperature than the hot gas flow.
  • the expansion medium is arranged downstream of the mass flow reducing agent.
  • a partial hot-gas flow reduced in pressure by the mass flow reducing agent is reduced in its temperature by expansion in the expansion medium.
  • it may also be the mass flow reducing agent downstream of the expansion means.
  • the protection of a hot gas and / or gas pressure-sensitive element of a high-power circuit breaker in front of a Hot gas flow between the hot gas flow and the element arranged a seal is protected from a hot gas flow.
  • a partial hot-gas flow is coupled out of the hot-gas flow in the seal, the mass flow of the partial-hot-gas flow is reduced and the partial-hot-gas flow expands in terms of volume.
  • the mass flow of the partial hot gas flow is caused substantially by the generation of internal friction within the partial hot gas flow. This is done advantageously by the partial hot gas flow is presented to a flowing through the cross section, which is small. In this way, the mass flow reduction is realized in a simple way. Further, this provides the advantage that parts of the high power switch adjacent to the mass flow reducer can receive heat from the partial hot gas flow so that the mass flow reducer also acts as a means for reducing the temperature of the partial hot gas flow.
  • the partial flow-generating means has a gap or is merely a gap.
  • the gap may also be part of the mass flow reducing agent or the expansion agent.
  • the partial flow generating means is realized in a simple way.
  • the mass flow reducing agent has a channel.
  • a channel is advantageously elongated and extends advantageous tight.
  • the channel can be extended along an axis and, in an advantageous embodiment, can be designed as an annular channel.
  • the partial flow generating means may also be integrated in the expansion medium or in the mass flow reducing agent.
  • the mass flow reducing means may be formed as a duct and the partial flow generating means as the hot gas flow side end of the duct.
  • the expansion means has a pressure relief space open to the element or is formed by such.
  • the partial hot-gas flow is presented with an increasing cross-sectional area upon entry into the expansion means.
  • the partial hot gas flow flows through a cross sectional area of a certain size, and the cross sectional area presented to the partial hot gas flow in the expansion means is larger than this. This leads to a volumetric expansion of the partial hot-gas flow, which in turn leads to a reduction in the temperature of the partial hot-gas flow.
  • the expansion means at least one pressure relief opening, through which the expansion means is connected to a reservoir volume containing gas whose temperature is at most as high as the temperature of the hot gas flow and / or its pressure is at most as large as the pressure of the hot gas flow.
  • the temperature and / or pressure in the reservoir volume is less than the temperature and pressure in the hot gas flow.
  • the element can also have a combined function. For example, it may simultaneously act as a guide and have a sealing function.
  • a seal according to the invention can be used in the case of very high relative speeds between such first and second parts of the heavy-duty circuit breaker; For example, if at least one of the parts is coupled to the drive motion for switching the switch, in which case relative speeds of over 10 m / s and over 15 m / s may occur between the first and second parts.
  • the first part of the high power switch may be at least partially extending along an axis.
  • the mass flow reducing agent can be extended along an axis.
  • the mass flow reducing agent and / or the expansion agent are adjacent to the first part.
  • a holder for holding the element. This can advantageously contribute at least partially to the formation of a further channel connecting the element to the expansion means (pressure relief space).
  • a holder for holding the element is provided, which is formed integrally with the seal together. This simplifies the manufacture of these high-performance switch components and can ensure a defined fixed arrangement of these high-performance switch components.
  • two or more seals can be provided, which are arranged one behind the other (in series).
  • a seal having a partial flow generating means and, downstream thereof, a mass flow reducing agent and an expanding agent.
  • a gasket may be used in a high power switch or in any other device in which hot gas flows occur and an element is to be protected from such hot gas flow.
  • Advantageous embodiments are possible in the manner described above.
  • Fig. 1 shows schematically and in section a detail of a substantially rotationally symmetrical high-power switch with an axis A.
  • Ein Outflow pipe 30, which is movable relative to a second part 40 of the high-performance switch along the axis A, by a hot gas flow 8 (symbolized by arrows) flows through. Through an opening 31, the hot gas can flow out of the outflow pipe.
  • a guide 10 arranged outside the outflow pipe 30 is provided, for example a hollow cylindrical piece of PTFE with additives or another polymer. The guide is held in a holder 11.
  • seal 1 is provided between the opening 31 and the guide 10, which is formed in a sealing body 1 a.
  • the seal 10 has a longitudinally extending and formed due to the rotational symmetry as an annular channel channel 2, through which the hot gas flow 8 facing end 2a, a partial hot gas flow 8a from the hot gas flow 8 is separated.
  • the partial hot-gas flow 8a flows through the narrow channel 2 and enters a pressure-relief space 3, which adjacent to the channel 2 has an optional funnel-shaped opening of the pressure relief space 3.
  • the flow rate of the partial hot gas flow 8a is limited by the sonic velocity of the hot gas, and because of the small cross section available to the partial hot gas flow 8a in the passage 2, there is considerable internal friction in the gas of the partial hot gas flow 8a. As a result, the mass flow of the partial hot gas flow 8a in the channel 2 is considerably reduced. At the pressure relief chamber side end of the channel 2 is thus opposite the hot gas pressure of the hot gas flow 8 significantly reduced hot gas pressure before.
  • the mass of the pressure reduction of the partial hot-gas flow 8a caused by the channel 2 can be achieved.
  • a further effect is that, due to the contact of the partial hot-gas flow 8a with the sealing body 1a and the outflow pipe 30, which both delimit the channel 2 and generally have a significantly lower temperature than the partial hot-gas flow 8a, the temperature of the part -Heissgasströmung 8a is reduced.
  • This effect can also be varied by varying the length of the channel 2 and its cross section.
  • the partial hot-gas flow 8a has an enlarged cross-sectional area to be flowed through (for example with a continuously increasing cross section, as in the subspace 3a shown in the figure).
  • the hot gas is expanded. Due to the expansion of the hot gas in the pressure relief chamber 3, there is a cooling of the hot gas.
  • the reduction in the temperature of the hot gas can be varied by varying the volume of the pressure relief space 3 and / or the cross-sectional area increase in the transition from channel 2 to the pressure relief space 3.
  • the pressure relief chamber 3 is connected to the guide 10.
  • Another function of the subspace 3a is to widen or fan out the flow profile of the part-hot-gas flow emerging from the channel 2, so that a lower pressure is exerted on the further channel 5 opposite the channel 2 than would be the case without the sub-space 3a ,
  • the guide 10 is exposed to a lower pressure of hot gas of lower temperature than would be the case in the hot gas flow 8.
  • the seal 10 does not touch the discharge pipe 30 and is insofar a non-contact seal. It is therefore in the case of very large relative speeds between parts 30,40 usable.
  • At least one pressure relief opening 4 is provided, through which the pressure relief chamber 3 is connected to an exhaust volume 20 serving as a reservoir volume 20.
  • the space in which the hot gas flow 8 impinges on the channel 2 can be completely separated from the reservoir volume 20 or connected to it via a more or less large opening. A stronger separation allows a greater pressure drop from the pressure relief chamber 3 to the reservoir volume 20, so that the pressure relief opening 4 can be effective even at lower pressures.
  • the seal 1 can also cause less hot gas and thus less contaminants to the seal 1 and in a space 90 arranged beyond the seal 1 reach. This may be particularly important if in this space 90 electrically insulating parts form a Isolierrange, over which it could come in the case of contamination of the insulating parts to flashovers and corresponding switch malfunction.
  • the guide 10 also has a sealing effect.
  • the seal especially by the choice of their dimensions, dimensioned so that on the one hand, the temperature to which the element 10 to be protected (guide) is exposed, is so low that it is not damaged, and on the other hand, the pressure, which Guide 10 is exposed, so low that the guide 10 has a sufficient sealing effect for the underlying space 90.
  • the sealing body 1 a (at least in the region of the channel 2) made of a temperature-resistant material such as ceramic, tungsten, tungsten carbide or steel.
  • Fig. 2 shows a larger section of a high-performance switch in the open state, which is constructed similar to the high-power switch shown in Fig. 1.
  • the seal 1 is integrally formed in this case with the part 40 of the heavy-duty circuit breaker.
  • the high-power switch also has a first arcing contact piece 51 and a second arcing contact piece 52, between which a few milliseconds to a few tens or a few are switched off during a switching-off operation 100 ms an arc 50 burns.
  • the contact piece 51 is surrounded by an auxiliary nozzle 55.
  • a main nozzle 56 forms with the auxiliary nozzle a connection of the arc space to a heating volume 80, which receives a portion of heated by the arc 50 gas. Another part of the heated gas flows in the direction away from the second contact piece 52 through the outflow pipe 30.
  • a boiler 22 limits a mixing volume 21, in which the hot gas of the hot gas flow 8 can mix with cooler, clean gas.
  • the space bounded by the boiler 22 may also be referred to as the flow-in space 21, since it also has the function of limiting the space in which the hot gas flow 8 flowing in against the seal 1 is present.
  • the mixing volume 21 is connected to the reservoir volume 20.
  • pressure (and also temperature) in the reservoir volume 20 can be kept smaller than in the mixing volume 21 at least for a certain period of time. This favors the pressure-limiting effect of the pressure relief opening (s) 4 for the pressure relief space third
  • the discharge pipe 30 is coupled by means of a hinge 71 to an insulating rod 70, which in turn is connected to a drive, not shown.
  • the guide 10 ensures a linear, along the axis A directed movement of the discharge pipe 30, while the insulating rod 70 angled movement in the A axis level.
  • the guide 10 has a sealing function intended to prevent the penetration of hot gas into the space 90, so that no flashovers occur in the field-loaded area near the insulating rod. Such flashovers may be favored by adsorption of impurities present in the hot gas on the surface of the insulating rod 70 as well as lack of dielectric strength of the gas present in the region of the insulating rod (pressure, temperature, impurities).
  • the hot gas flow 8 is essentially caused by a pressure surge and thus of a correspondingly short duration.
  • the seal 10 is particularly well suited.
  • Fig. 3 shows schematically and in section a further embodiment of the invention.
  • a hot gas flow 8 to be protected element 10 either a seal 10 or a contacting element 10 is provided.
  • Figure 3 is interpretable in at least these two ways.
  • a bushing 30 ' is shown, which may be part of a high-power switch, but also in other devices, such as other high-voltage devices may be provided.
  • the part 30 ' may for example also be a preferably movable contact piece of a high-power switch. In this case, the part 30 'does not necessarily require insulation as provided on the part 30' in Fig. 3.
  • the contacting element 10 may, for example, comprise contact blades.
  • the seal 1 in the case of a switch with two movable contact pieces, for example an arcing contact piece 30 'and a (not shown in FIG. 3) Kontkttulpe.
  • the movable contacting element 10 is then protected from the hot gas flow generated by an arc on the arcing contact 30 '.
  • the mutual mobility of the two parts 30, 40 '(or 30, 40) does not have to be a linear mobility, but may, for example, also be a rotatability or simply be a mutual mobility in the sense of a game or adjustability.
  • the element 10 is a seal
  • this may for example be made of a polymer and prevent penetration of gas or liquid into the region of the hot gas flow 8 and / or the escape of hot gas of the hot gas flow 8.
  • the seal 1 is provided, which is constructed substantially the same and has the same operating principle as that shown in Fig. 1.
  • the element 10 is a contacting element 10
  • it may for example be a multi-contact ring 10 or a spiral spring contact element 10 and serve to establish a releasable electrical contact between the (electrical) feedthrough 30 'and the second part 40.
  • the seal 1 has substantially the same structure and the same operating principle as that shown in Fig. 1.
  • Hot gas flow through the seal may be understood to reduce the temperature and / or pressure of a gas through the seal.
  • the hot gas flow may be continuous (permanent) or, as in the in connection with Figs. 1 and 2 described embodiments in the case of a heavy-duty circuit breaker, short-lived and pressure surge.
  • high-power switch applications are due to the hot gas pressure surge during typically 10 ms to 200 ms pressures of typically 10 bar to 25 bar and temperatures of 1000 K to 2500 K before.
  • other applications of the seal also smaller and larger pressures and temperatures are conceivable.
  • the gasket of the present invention may also be referred to as a high-pressure gas protection device, a high-temperature gas protection device or a high-pressure gas high-temperature gas protection device; or as a protective device against high-pressure gas pulses or as a protective device against gas pulses, in particular high-pressure gas pulses of high temperature.

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  • Circuit Breakers (AREA)
  • Resistance Heating (AREA)
EP04405797A 2004-12-23 2004-12-23 Disjoncteur à haute puissance avec joint contre les gaz d'arc Withdrawn EP1675145A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP04405797A EP1675145A1 (fr) 2004-12-23 2004-12-23 Disjoncteur à haute puissance avec joint contre les gaz d'arc
EP05812904A EP1829076B1 (fr) 2004-12-23 2005-12-14 Disjoncteur a haute puissance avec joint contre les gaz d'arc
AT05812904T ATE400885T1 (de) 2004-12-23 2005-12-14 Hochleistungsschalter mit dichtung gegen heissgas
JP2007547140A JP2008525946A (ja) 2004-12-23 2005-12-14 高温ガスに対するシーリングを備えたヘビーデューティ・サーキット・ブレーカ
DE502005004684T DE502005004684D1 (de) 2004-12-23 2005-12-14 Hochleistungsschalter mit dichtung gegen heissgas
CN200580044563XA CN101088135B (zh) 2004-12-23 2005-12-14 具有针对热气的密封件的大功率开关
PCT/CH2005/000750 WO2006066429A1 (fr) 2004-12-23 2005-12-14 Disjoncteur comportant un joint contre les gaz chauds
US11/812,729 US7732727B2 (en) 2004-12-23 2007-06-21 Heavy-duty circuit-breaker with sealing against hot gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405797A EP1675145A1 (fr) 2004-12-23 2004-12-23 Disjoncteur à haute puissance avec joint contre les gaz d'arc

Publications (1)

Publication Number Publication Date
EP1675145A1 true EP1675145A1 (fr) 2006-06-28

Family

ID=34932423

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04405797A Withdrawn EP1675145A1 (fr) 2004-12-23 2004-12-23 Disjoncteur à haute puissance avec joint contre les gaz d'arc
EP05812904A Active EP1829076B1 (fr) 2004-12-23 2005-12-14 Disjoncteur a haute puissance avec joint contre les gaz d'arc

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP05812904A Active EP1829076B1 (fr) 2004-12-23 2005-12-14 Disjoncteur a haute puissance avec joint contre les gaz d'arc

Country Status (7)

Country Link
US (1) US7732727B2 (fr)
EP (2) EP1675145A1 (fr)
JP (1) JP2008525946A (fr)
CN (1) CN101088135B (fr)
AT (1) ATE400885T1 (fr)
DE (1) DE502005004684D1 (fr)
WO (1) WO2006066429A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2892851B1 (fr) * 2005-11-03 2013-12-06 Areva T & D Sa Chambre de coupure de courant a double chambre de compression
DE102007063424A1 (de) * 2007-12-19 2009-06-25 Siemens Ag Unterbrecheranordnung mit einem bewegbaren Schaltrohr
DE102008039813A1 (de) * 2008-08-25 2010-03-04 Siemens Aktiengesellschaft Hochspannungs-Leistungsschalter mit einer Schaltstrecke
CN101908436B (zh) * 2010-08-20 2012-06-27 中国西电电气股份有限公司 一种提高电弧电压的灭弧室结构
WO2013175565A1 (fr) * 2012-05-22 2013-11-28 三菱電機株式会社 Coupe-circuit à gaz
US9461446B1 (en) 2015-03-30 2016-10-04 General Electric Company Electrical enclosure having a breaker cover gasket and method
US9653896B2 (en) 2015-03-30 2017-05-16 General Electric Company Electrical enclosure including an integral exhaust duct and method
US10426049B2 (en) 2015-03-30 2019-09-24 Abb Schweiz Ag Electrical enclosure including a selectively closeable ventilation opening and method
EP3503152B1 (fr) * 2017-12-22 2020-10-14 ABB Power Grids Switzerland AG Disjoncteur haute ou moyenne tension isolé au gaz
EP3503153B1 (fr) 2017-12-22 2021-09-01 ABB Power Grids Switzerland AG Disjoncteur haute ou moyenne tension isolé au gaz

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DE1271241B (de) * 1966-11-14 1968-06-27 Siemens Ag Druckgasschalter
US3612799A (en) * 1969-05-08 1971-10-12 Ite Imperial Corp Gas blast circuit interrupter using main movable contact as blast valve
US3670126A (en) * 1969-07-01 1972-06-13 Westinghouse Electric Corp Compressed-gas circuit interrupter having a pair of rapid transfer insulating nozzles
US3674957A (en) * 1970-05-22 1972-07-04 Bbc Brown Boveri & Cie Gas blast switch
EP0290950A1 (fr) * 1987-05-13 1988-11-17 BBC Brown Boveri AG Disjoncteur à gaz comprimé
US5483210A (en) * 1994-04-08 1996-01-09 Abb Power T&D Company Inc. Mechanical guidance system for switcher interrupter and method for assembling the same

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US3551624A (en) * 1966-09-01 1970-12-29 Westinghouse Electric Corp Gas-flow circuit interrupters having improved orifice and contact constructions
CH519778A (de) * 1970-08-07 1972-02-29 Bbc Brown Boveri & Cie Druckgasschalter
JPS524067A (en) * 1975-05-30 1977-01-12 Mitsubishi Electric Corp Gas breaker
CH632609A5 (de) * 1977-03-24 1982-10-15 Mitsubishi Electric Corp Stromunterbrecher mit lichtbogenloeschendem gas.
US4237356A (en) * 1977-04-13 1980-12-02 Bbc Brown, Boveri & Company Limited Electrical compression switch with contact movement assistor
DE3440212A1 (de) * 1984-10-10 1986-04-17 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Druckgasschalter
FR2646013B1 (fr) * 1989-04-17 1996-02-23 Alsthom Gec Disjoncteur a moyenne tension a gaz de soufflage
FR2732157B1 (fr) * 1995-03-22 1997-05-09 Schneider Electric Sa Disjoncteur a gaz equipe d'une chambre a autoexpansion et a arc tournant
FR2748598B1 (fr) * 1996-05-13 1998-06-05 Gec Alsthom T & D Sa Disjoncteur a haute tension a auto-soufflage
DE29706202U1 (de) * 1997-03-27 1997-06-05 Siemens Ag Druckgasleistungsschalter
JP4174094B2 (ja) * 1998-01-29 2008-10-29 株式会社東芝 ガス遮断器
DE19953560C1 (de) * 1999-11-03 2001-06-07 Siemens Ag Druckgas-Leistungsschalter
ATE388478T1 (de) * 2002-09-24 2008-03-15 Abb Schweiz Ag Leistungsschalter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1271241B (de) * 1966-11-14 1968-06-27 Siemens Ag Druckgasschalter
US3612799A (en) * 1969-05-08 1971-10-12 Ite Imperial Corp Gas blast circuit interrupter using main movable contact as blast valve
US3670126A (en) * 1969-07-01 1972-06-13 Westinghouse Electric Corp Compressed-gas circuit interrupter having a pair of rapid transfer insulating nozzles
US3674957A (en) * 1970-05-22 1972-07-04 Bbc Brown Boveri & Cie Gas blast switch
EP0290950A1 (fr) * 1987-05-13 1988-11-17 BBC Brown Boveri AG Disjoncteur à gaz comprimé
US5483210A (en) * 1994-04-08 1996-01-09 Abb Power T&D Company Inc. Mechanical guidance system for switcher interrupter and method for assembling the same

Also Published As

Publication number Publication date
CN101088135B (zh) 2012-04-18
US20080011719A1 (en) 2008-01-17
WO2006066429A1 (fr) 2006-06-29
US7732727B2 (en) 2010-06-08
ATE400885T1 (de) 2008-07-15
EP1829076A1 (fr) 2007-09-05
CN101088135A (zh) 2007-12-12
EP1829076B1 (fr) 2008-07-09
JP2008525946A (ja) 2008-07-17
DE502005004684D1 (de) 2008-08-21

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