CN101636889B - Metal closed type switch gear - Google Patents
Metal closed type switch gear Download PDFInfo
- Publication number
- CN101636889B CN101636889B CN2007800522160A CN200780052216A CN101636889B CN 101636889 B CN101636889 B CN 101636889B CN 2007800522160 A CN2007800522160 A CN 2007800522160A CN 200780052216 A CN200780052216 A CN 200780052216A CN 101636889 B CN101636889 B CN 101636889B
- Authority
- CN
- China
- Prior art keywords
- casing
- air entry
- breaker chamber
- switch gear
- type switch
- 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.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
Abstract
A metal-closed switch gear in which an electrical machine is housed inside a box (1) having an inlet (4) and an outlet (18). Inside the casing part of the box (1) where the inlet (4) is bored, an intra-board partition plate (17) functioning as a ventilating partition plate having a vent hole (19) opposed to the inlet (4) is arranged apart from the casing part so that the intra-board partition plate (17) may suppress discharging of a high-temperature ark gas from the inlet (4) to the outside in occurrence of a short circuit in a cable chamber (14) inside the box (1).
Description
Technical field
The present invention relates to a kind of inside at the casing with air entry and exhaust outlet holds electric equipment, constitutes the metal closed type switch gear of taking a breath in inside.
Background technology
Metal closed type switch gear is to be used in dish, holding electric equipment such as circuit breaker, to carry out the distribution board of distribution safely.In the metal closed type switch gear, on door surface or shell, be provided with the air entry and the exhaust outlet of ventilation usefulness, so that inhibition dish temperature inside rises.Structure as the ventilation portion of existing metal closed type switch gear; For example disclosed the air interchanger of the switching device that adopts following structure, that is, penetrated on the door and be provided with scavenge port; From the rear side of door the ventilation plate that is formed with a plurality of air-vents is installed; To block scavenge port, further be provided with protective plate at its rear side, this protective plate is inserted and is led on the countersunk bolt of the circumference that is vertically installed in scavenge port; And move forward and backward freely, protective plate and ventilation plate are utilized in the spring that is provided with between them and keep predetermined interval at ordinary times.
Utilize this structure; Because ambient atmos can freely be come in and gone out between protective plate and the ventilation plate usually; Therefore satisfy ventilatory, and when when body interior is short-circuited accident, because of high-temperature gas makes protective plate compression spring move; Block the air-vent of ventilation plate, prevent the place ahead ejection (for example with reference to patent documentation 1) of high-temperature gas propylaeum.
Patent documentation 1: japanese patent laid-open 9-238413 communique (the 2nd page, Fig. 1)
In the air interchanger of the existing switching device shown in the patent documentation 1; Owing to consider when accident such as being short-circuited; Just be provided with the protective plate of atresia at the rear of the ventilation plate that is formed with a plurality of air-vents, therefore the path of ventilation is narrow and small, and just often the scavenging efficiency of ventilation correspondingly reduces.
In addition, have following problem, that is, need be used to be provided with the countersunk bolt or the installation component of protective plate, also need be used for the spring member of mobile protective plate etc., cause component number to increase, processing and assembling number in man-hour increase, and cost rises.
Summary of the invention
The present invention accomplishes in order to address the above problem; Its purpose is to obtain a kind of metal closed type switch gear; This metal closed type switch gear comprises air entry and exhaust outlet; And the arcing gas that produces in the time of can be with simple OILS STRUCTURE DEPRESSION short circuit accident is ejected into outside the casing through air entry, and scavenging efficiency is just often reduced.
Metal closed type switch gear involved in the present invention is the metal closed type switch gear that accommodates electric equipment in the inside of the casing with air entry and exhaust outlet; Inboard at the housing department of the casing that is formed with air entry; Open certain intervals and relatively dispose the ventilation dividing plate that is formed with blow vent with the housing department sky with air entry; When the inside at casing was short-circuited accident, the arcing gas that utilizes the ventilation dividing plate to suppress high temperature was discharged to the outside from air entry.
According to metal closed type switch gear of the present invention; Because inboard at the housing department of the casing that is formed with air entry; Open certain intervals and relatively dispose the next door that is formed with blow vent with the housing department sky with air entry; When being short-circuited accident, the arcing gas that utilizes the ventilation dividing plate to suppress high temperature is discharged to the outside from air entry, therefore can suppress arcing gas when the internal short-circuit accident with simple structure and spray from air entry; With the personal security of guaranteeing that casing is peripheral, and scavenging efficiency is just often reduced.
Description of drawings
Fig. 1 is the front elevation of the metal closed type switch gear in the execution mode 1 of the present invention.
Fig. 2 is the side sectional view of the metal closed type switch gear of Fig. 1.
Fig. 3 is the details drawing of breaker chamber door of the metal closed type switch gear of presentation graphs 1.
Fig. 4 is the details drawing of casing internal partition of the metal closed type switch gear of presentation graphs 1.
Fig. 5 is at just often the flow model figure from the air outside the casing in the expression metal closed type switch gear of the present invention.
Fig. 6 is the flow model figure of the arcing gas when the internal short-circuit accident takes place in the expression metal closed type switch gear of the present invention.
Fig. 7 is the key diagram of an example of relation of air entry and the blow vent of the metal closed type switch gear of expression in the execution mode 1 of the present invention.
Embodiment
Specify the present invention according to accompanying drawing below.
At first, according to Fig. 1 and Fig. 2, the overall structure of metal closed type switch gear is described.
Its integral body of metal closed type switch gear is covered by metal casing 1, and face side is as shown in Figure 1, utilizes hinge to be provided with a plurality of positive door to be opened/closed.Top is control room's door 2, two breaker chamber door 3a, the 3b that arrange about being the bottom.Lower side at breaker chamber door 3a, 3b is formed with air entry 4 (details will be set forth in the back) respectively.
The inside of casing 1 is divided into a plurality of chambers; Above the inboard of breaker chamber door 3a, dispose breaker chamber 5a; Likewise above the inboard of breaker chamber door 3b, also dispose breaker chamber 5b, the below of two breaker chamber 5a, 5b is whole for connecting work-room 6.In addition, the inboard of control room's door 2, to be that the top of breaker chamber 5a, 5b is whole be to accommodate control appliances such as meters, relay in control room 7.
Accommodate circuit breaker 8a in the inside of breaker chamber 5a; In addition, accommodate circuit breaker 8b, shown in the side sectional view of Fig. 2 in the inside of breaker chamber 5b; Rear wall at breaker chamber 5a, 5b; The configuration sub-9a of upper linker and bottom splicing ear 9b make with the wall insulation and connect wall, and constitute and can install and remove with the circuit breaker terminal (not shown) at the back of circuit breaker 5a, 5b.
The space at the rear of breaker chamber 5a, 5b is to be that the boundary is divided into two between sub-9a of above-mentioned upper linker and the bottom splicing ear 9b, and the space of upside is a bus-bar room 10.Above in bus-bar room 10, configuration three-phase horizontal bus 11 and by casing 1 insulation supporter, and also the bifurcated conductor 12 that the sub-9a of horizontal bus 11 and upper linker is connected is supported by casing 1 through support insulator and is contained in wherein.
On the other hand, the space of downside is cable vault 14, is the cable 13 that unit holds the load-side that is connected respectively with circuit breaker 8a, 8b respectively with the circuit breaker in this cable vault 14.
Each cable 13 is connected with bottom splicing ear 9b through bonding conductor 15, the perforation midway of bonding conductor 15 be provided with current transformer 16.
In above-mentioned illustrated, breaker chamber 5a, 5b, connection work-room 6, control room 7, bus-bar room 10, the cable vault 14, each chamber is separated by a plurality of casing internal partitions each other, to improve fail safe.For example, separating what connect work-room 6 and cable vault 14 is casing internal partition 17.In addition, omit the label of casing internal partition in addition.
In the metal closed type switch gear that constitutes like this, owing to flow through big electric current via circuit breaker 8a, 8b to cable 13 from bus 11 in the course of the work, so generate heat in conducting parts or the connecting portion, the temperature in the casing rises.For the heat in the casing is dispelled the heat to the outside, be formed with the air entry 4 that is used to import ambient atmos at the shell of casing 1.If consider the situation of accompanying drawing, then the bottom of breaker chamber door 3a, 3b is the position of air entry 4.In addition, on the top board of casing 1, be provided with exhaust outlet 18.Constitute like this, in casing, import ambient atmos, inner cooling back is discharged to outside the casing from exhaust outlet 18, be suppressed at below the setting thereby the temperature in the casing risen from the air entry 4 of bottom.
In addition, the position of air entry 4 is not limited to the positive door of casing, also can be the back side of casing 1 etc.In addition, the position of exhaust outlet 18 also is not limited to the position of accompanying drawing.
As stated, because the inside of casing 1 is divided into a plurality of chambers by the casing internal partition, therefore after the appropriate location of a plurality of casing internal partitions is provided with, state such blow vent, making can be efficiently with being directed into the exhaust outlet that inner ambient atmos guides to the top.
The details of the door of breaker chamber shown in Fig. 3 3a.Be formed with the air entry 4 of above-mentioned that kind in the lower side of breaker chamber door 3a.This air entry 4 is to be illustrated in to utilize punching processing etc. to form a plurality of horizontal slits on the plate face, but open pore is not limited to the shape of accompanying drawing, for example also can be circular hole or polygonal hole, and also available louvre window or woven wire wait and constitute except that punching in addition.
Fig. 4 is a details drawing of dividing the casing internal partition 17 that connects work-room 6 and cable vault 14.On casing internal partition 17, be formed with blow vent 19.Blow vent 19 is that expression forms with a plurality of slits, but identical with the air entry 4 of above-mentioned breaker chamber door 3a, also can be other shape.
Then, air-exchanging structure and effect as feature of the present invention are described.
Fig. 5 is the flow model figure from the outer air of casing that representes just often.The flow model figure of the arcing gas when in addition, Fig. 6 is expression generation internal short-circuit accident.At first, according to these two figure, begin to describe from the grown form of the air-exchanging structure portion of metal closed type switch gear of the present invention.
The housing department of the casing that is formed with air entry 41 (that is, and the shell of casing 1 be formed with air entry 4 near) the inboard, open certain intervals with this housing department sky, and relative with air entry 4, the ventilation dividing plate 20 that is formed with blow vent 19 is set.In the inner room 21 at rear of ventilation dividing plate 20, accommodate the electric equipment of the accident that may be short-circuited.
When operate as normal; Because the temperature of the electric equipment in the casing rises; Make ambient atmos be directed to cup 22 from the air entry 4 of casing 1 because of the free convection forced ventilation of (perhaps because of fan etc.); Become the such air stream of arrow, and flow into inner room 21, the electric equipment that holds is cooled off from the blow vent 19 of ventilation dividing plate 20.
Because air velocity just often is slower, the dividing plate 20 of therefore ventilating can not hinder the circulation of air, can not destroy ventilatory.
Then, the be short-circuited situation of accident of the electric equipment that is contained in inner room 21 is described.As shown in Figure 6, at accident origination point 23, produce the arcing gas of superhigh temperature, the pressure in the inner room 21 sharply rises.At this moment, if do not ventilate dividing plate 20, then the arcing gas of high temperature may be ejected into the casing outside from the air entry 4 of casing 1; But in this execution mode; Because between the housing department of accident origination point 23 and casing 1, be provided with the ventilation dividing plate 20 that separates cup 22 and have blow vent 19, therefore pass blow vent 19 and be ejected in the process of cup 22 at the arcing gas of HTHP; Shown in arrow; The bigger resistance of ejection pressure because of through blow vent 19 time weakens, and the simultaneous temperature that pressure reduces in the bigger space of cup 22 descends, so can prevent that the arcing gas of high temperature from flowing out to outside the casing.
With the structure of above-mentioned that kind, compare with the metal closed type switch gear of the illustrated structure of Fig. 1～Fig. 4, Fig. 5 is equivalent to the breaker chamber door 3a shown in the side view of Fig. 2 and the part of casing internal partition 17.Therefore, the label of the part corresponding with the illustrated structure of Fig. 1～Fig. 4 is shown in bracket among Fig. 5.
The housing department that is formed with the casing 1 of air entry 4 is breaker chamber door 3a, and ventilation dividing plate 20 is equivalent to casing internal partition 17, and cup 22 is parts corresponding with connecting work-room 6, and inner room 21 is parts corresponding with cable vault 14.
Thereby, if adopt the structure of the metal closed type switch gear of Fig. 1～shown in Figure 4, then can with separate connect work-room 6 and cable vault 14 casing internal partition 17 dual-purposes as ventilation dividing plate 21.
If do not connect under the downside of work-room 6 and breaker chamber 5a and the situation that the 14a of cable vault is connected in one, then as long as near the position of casing internal partition 17 shown in Figure 2, separately ventilation dividing plate 20 is set.
In addition, the internal structure of Fig. 1, metal closed type switch gear shown in Figure 2 is example of expression, and is not limited to this structure.As metal closed type switch gear, its object is in casing 1, to have air entry 4 accommodates the electric equipment of the accident that may be short-circuited with exhaust outlet 18 and in inside device.
Will be in the inboard of the housing department of the casing that is formed with air entry 41, ventilation dividing plate 20 as shown in Figure 5 is set as grown form, but under the situation of the casing internal partition that dual-purpose is arranged, casing internal partition dual-purpose is got final product as the ventilation dividing plate.
In addition, in Fig. 1, the metal closed type switch gear shown in Figure 2, be parallel on the direction of the earth, and when the front of casing 1 is looked sideways, a plurality of circuit breakers (being two of 8a, 8b in the situation of accompanying drawing) arranged along the left and right directions alignment arrangements.Be contained under the situation in the casing at a plurality of circuit breakers, if like this along horizontal and row arrangement, then owing to can form the space at the above-below direction of circuit breaker 8a, 8b; Therefore for example; As shown in the figure, can the space of top be used as control room 7, the space of below is used as connects work-room 6.Usually,, therefore obtain air entry 4, the structure relative easily with the casing internal partition of the inwall that is connected work-room 6 17 because air entry 4 is located at the bottom of the face side of casing 1 under the more situation, can be easily with casing internal partition 17 dual-purposes as the dividing plate 20 of ventilating.In addition, the effect that also can expect to obtain in the bigger space that connects work-room 6, the pressure of arcing gas is reduced.
Fig. 7 is the key diagram of other example of air entry and the blow vent of expression ventilation portion.As before illustrated, air entry 4 and blow vent 19 are formed by slit or the such a plurality of open pores of circular hole.The magnitude relationship of this open pore is following.That is, make the blow vent 19 that is formed at ventilation dividing plate 20 open pore, compare casing 1 the open pore of air entry 4 little.
If adopt this structure, then the resistance of blow vent 19 becomes big, and it is better that the arcing gas that produces during the internal short-circuit accident is ejected into the effect that the pressure of outer side reduces through blow vent 19.
As stated; According to the invention of this execution mode, owing in the metal closed type switch gear, accommodate electric equipment in the inside of casing with air entry and exhaust outlet; Inboard at the housing department of the casing that is formed with air entry; Open certain intervals and relatively dispose the ventilation dividing plate that is formed with blow vent with air entry with the housing department sky, when the inside at casing was short-circuited accident, the arcing gas that utilizes the ventilation dividing plate to suppress high temperature was discharged to the outside from air entry; Therefore can when the internal short-circuit accident takes place, guarantee the personal security of casing periphery with simple structure, and scavenging efficiency is just often reduced.
In addition; Because air entry and blow vent are formed by a plurality of open pores respectively; And make the open pore of blow vent littler than the open pore of air entry, therefore when the accident that is short-circuited produced arcing gas, it is big that the resistance of blow vent becomes; Utilization ventilation dividing plate can reduce the pressure of arcing gas effectively, so it is better from the effect that air entry is discharged to the outside to suppress arcing gas.
In addition; Because air entry is located at the positive door of the shell that constitutes casing; Ventilation dividing plate double as becomes the part of the casing internal partition of a plurality of chambers to use for the internal separation with casing; Therefore can when the internal short-circuit accident, suppress arcing gas and be ejected into outside the casing, and almost need not to increase component number and processing and assembling number in man-hour.
In addition; Since with the internal separation of casing become to be disposed at the face side of casing breaker chamber, be disposed at the top of breaker chamber the control room, be disposed at the below of breaker chamber the connection work-room, be disposed at breaker chamber top, rear bus-bar room and be disposed at the cable vault of the rear lower portion of circuit breaker; Be formed with the breaker chamber door of the positive door of air entry as the front of being located at breaker chamber and connection work-room; The casing endoseptum of dual-purpose is as dividing the casing internal partition that connects work-room and cable vault; Therefore except above-mentioned effect; During the accident that is short-circuited in the cable vault, can reduce the temperature and pressure of arcing gas effectively at the bigger connection work-room of its face side.
And in addition; Because in the breaker chamber; Be parallel to the earth and arrange along left and right directions when the front of casing is looked sideways and accommodate a plurality of circuit breakers; Therefore even under circuit breaker is many situation, also can form bigger space, lead to the ventilation path in the casing and the ventilation dividing plate is set easily so can this space be used as from air entry in the bottom of circuit breaker.
Claims (4)
1. a metal closed type switch gear accommodates electric equipment in the inside of the casing (1) with air entry (4) and exhaust outlet (18), it is characterized in that,
Inboard at the housing department of the said casing (1) that is formed with said air entry (4); Open certain intervals and relatively dispose the ventilation dividing plate (20) that is formed with blow vent (19) with said housing department sky with said air entry (4); When the inside at said casing (1) is short-circuited accident; The arcing gas that utilizes said ventilation dividing plate (20) to suppress high temperature is discharged to the outside from said air entry (4)
Said air entry (4) and said blow vent (19) are formed by a plurality of open pores respectively, and the open pore of said blow vent (19) is littler than the open pore of said air entry (4).
2. metal closed type switch gear as claimed in claim 1 is characterized in that,
Said air entry (4) is located at the bottom of the positive door (3a, 3b) that constitutes said casing (1), and said ventilation dividing plate (20) double as becomes the part of the casing internal partition (17) of a plurality of chambers to use for the internal separation with said casing (1).
3. metal closed type switch gear as claimed in claim 2 is characterized in that,
The bus-bar room (10) on the top, rear that the inside of said casing (1) is divided into breaker chamber (5a, 5b), the control room (7) that is disposed at the top of said breaker chamber (5a, 5b), the space (6) that is disposed at the below of said breaker chamber (5a, 5b) that are disposed at face side, be disposed at said breaker chamber (5a, 5b) and be disposed at the cable vault (14) of the rear lower portion of said breaker chamber (5a, 5b); The said positive door that is formed with said air entry (4) is a breaker chamber door of being located at the front of said breaker chamber (5a, 5b) and said space (6), and dual-purpose is that the said casing internal partition of said ventilation dividing plate (20) is a casing internal partition (17) of dividing said space (6) and said cable vault (14).
4. metal closed type switch gear as claimed in claim 3 is characterized in that,
In the said breaker chamber (5a, 5b), be parallel to the earth and arrange along left and right directions when the front of said casing (1) is looked sideways and accommodate a plurality of circuit breakers (8a, 8b), said each circuit breaker (8a, 8b) separates through dividing plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2007/059027 WO2008136113A1 (en) | 2007-04-26 | 2007-04-26 | Metal closed type switch gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101636889A CN101636889A (en) | 2010-01-27 |
| CN101636889B true CN101636889B (en) | 2012-07-04 |
Family
ID=39943235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800522160A Expired - Fee Related CN101636889B (en) | 2007-04-26 | 2007-04-26 | Metal closed type switch gear |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP4979767B2 (en) |
| KR (1) | KR101083112B1 (en) |
| CN (1) | CN101636889B (en) |
| HK (1) | HK1139513A1 (en) |
| MY (1) | MY184827A (en) |
| WO (1) | WO2008136113A1 (en) |
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| JP5432040B2 (en) * | 2010-04-08 | 2014-03-05 | 三菱電機株式会社 | Switchgear |
| ES2602463T3 (en) | 2010-05-26 | 2017-02-21 | Abb Schweiz Ag | Electric switch panel with improved arc protection assembly |
| JP5554152B2 (en) * | 2010-06-09 | 2014-07-23 | 三菱電機株式会社 | Switchgear |
| JP5546362B2 (en) * | 2010-06-11 | 2014-07-09 | 三菱電機株式会社 | Switchgear |
| JP5597121B2 (en) * | 2010-12-15 | 2014-10-01 | 三菱電機株式会社 | Metal closed switchgear |
| EP2501001B1 (en) * | 2011-03-16 | 2017-05-03 | ABB Schweiz AG | Electric switchgear panel with gas venting assembly |
| US9166384B2 (en) * | 2011-04-28 | 2015-10-20 | Mitsubishi Electric Corporation | Switchgear |
| EP2940812B1 (en) * | 2012-12-26 | 2018-03-28 | Mitsubishi Electric Corporation | Switchgear |
| CN103296589A (en) * | 2013-06-07 | 2013-09-11 | 南通亚浦照明电器制造有限公司 | Low voltage switch cabinet |
| CN105765009B (en) | 2013-11-28 | 2019-08-06 | 捷恩智株式会社 | Photo-hardening ink-jet ink and its application |
| CN103795000B (en) * | 2014-01-13 | 2015-04-22 | 江苏现代电力科技股份有限公司 | Intelligent high voltage alternating-current metal enclosed switchgear and control device |
| KR101493432B1 (en) * | 2014-08-21 | 2015-02-17 | 주식회사 리폼테크 | Door of the switchboard to protect from arc gas |
| KR101893670B1 (en) * | 2014-09-24 | 2018-08-30 | 미쓰비시덴키 가부시키가이샤 | Switchgear |
| KR102304632B1 (en) | 2015-07-17 | 2021-09-24 | 엘지디스플레이 주식회사 | Display device |
| CN105186422A (en) * | 2015-10-19 | 2015-12-23 | 山东达驰阿尔发电气有限公司 | Cable switch cabinet for enclosed busbar |
| CN107370052A (en) * | 2016-06-14 | 2017-11-21 | 阿特尔 | A kind of electric power distributing cabinet |
| CN109314373B (en) * | 2016-06-21 | 2020-06-26 | 三菱电机株式会社 | Switching device |
| CN106451189B (en) * | 2016-11-12 | 2018-09-21 | 上海天灵开关厂有限公司 | A kind of door of metal enclosed switchgear |
| JP6289780B1 (en) * | 2017-06-06 | 2018-03-07 | 三菱電機株式会社 | Electrical equipment housing |
| JP7043097B2 (en) * | 2018-04-25 | 2022-03-29 | 東芝三菱電機産業システム株式会社 | Power converter |
| US11631968B2 (en) * | 2019-03-15 | 2023-04-18 | Ls Electric Co., Ltd. | Arc ventilation system of distributing board |
| CN113644576A (en) * | 2021-09-01 | 2021-11-12 | 广东中盛纳科技有限公司 | Centrally installed switchgear capable of meeting temperature rise and arcing requirements |
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- 2007-04-26 WO PCT/JP2007/059027 patent/WO2008136113A1/en active Application Filing
- 2007-04-26 KR KR1020097016740A patent/KR101083112B1/en active IP Right Grant
- 2007-04-26 JP JP2009512844A patent/JP4979767B2/en active Active
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|---|---|---|---|---|
| CN2636464Y (en) * | 2003-07-23 | 2004-08-25 | 青岛经济技术开发区电器研究所 | Natural air cooling medium voltage switch cabinet |
| CN2733686Y (en) * | 2004-05-09 | 2005-10-12 | 浙江开关厂有限公司 | Metal enclosed switching cabinet |
| CN2742729Y (en) * | 2004-11-05 | 2005-11-23 | 杭州欣美成套电器制造有限公司 | Drawing type high voltage switch cabinet forced wind cooler |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008136113A1 (en) | 2008-11-13 |
| CN101636889A (en) | 2010-01-27 |
| HK1139513A1 (en) | 2010-09-17 |
| JP4979767B2 (en) | 2012-07-18 |
| KR101083112B1 (en) | 2011-11-11 |
| KR20100004959A (en) | 2010-01-13 |
| JPWO2008136113A1 (en) | 2010-07-29 |
| MY184827A (en) | 2021-04-24 |
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