WO2005055255A1 - Verfahren zur luftentfeuchtung und luftentfeuchter für ölisolierte transformatoren, drosselspulen sowie stufenschalter - Google Patents
Verfahren zur luftentfeuchtung und luftentfeuchter für ölisolierte transformatoren, drosselspulen sowie stufenschalter Download PDFInfo
- Publication number
- WO2005055255A1 WO2005055255A1 PCT/EP2004/013774 EP2004013774W WO2005055255A1 WO 2005055255 A1 WO2005055255 A1 WO 2005055255A1 EP 2004013774 W EP2004013774 W EP 2004013774W WO 2005055255 A1 WO2005055255 A1 WO 2005055255A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- air
- dehumidifier
- oil
- expansion vessel
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000008187 granular material Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000007791 dehumidification Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 238000005485 electric heating Methods 0.000 claims 3
- 239000003570 air Substances 0.000 description 33
- XMTQQYYKAHVGBJ-UHFFFAOYSA-N 3-(3,4-DICHLOROPHENYL)-1,1-DIMETHYLUREA Chemical compound CN(C)C(=O)NC1=CC=C(Cl)C(Cl)=C1 XMTQQYYKAHVGBJ-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000005293 duran Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/321—Insulating of coils, windings, or parts thereof using a fluid for insulating purposes only
Definitions
- the invention relates to a method for air dehumidification for oil-insulated transformers, choke coils and step switches for dehumidifying the air sucked into oil expansion vessels.
- the invention further relates to a dehumidifier suitable for this.
- an oil expansion vessel is usually provided in order to compensate for the volume changes in the insulating oil caused by the temperature changes. So that the air drawn in does not have an impermissible moisture content, it is dried using a dehumidifier.
- a dehumidifier is known from EP 1 313 112 A1.
- This known dehumidifier has a housing in which a moisture-absorbing absorbent or granulate is arranged, through which the sucked-in air flows.
- the granulate is regenerable, i. H. can be repeatedly reset to the moisture-absorbing state by heating in the saturated state.
- a heating device in the housing which can be controlled by a moisture sensor which is arranged above the housing, is used for heating the granules, so that the air which has already passed through the granules flows around it. If the moisture sensor signals an inadmissible moisture content in the sucked-in air and thus saturation of the granules, the heating device is actuated, the granules are heated and thus returned to the moisture-absorbing state.
- a disadvantage of this known solution is that the solenoid valve described prevents the air exchange between the air space of the oil expansion vessel on the one hand and the ambient air on the other hand during the bakeout because it is closed. As a result, an overpressure or even a negative pressure can build up in the oil expansion vessel during this heating time, which can lead to an excessive flow through the dehumidifier after the solenoid valve has been opened. This increased flow, i. H. the increased air throughput can question sufficient dehumidification of the air flowing through. However, it must be prevented in any case that moist air can get into the oil expansion tank.
- the object of the invention is therefore to provide a method which avoids this undesirable entry of insufficiently dehumidified air into the oil expansion vessel with certainty. Furthermore, it is an object of the invention to provide a corresponding dehumidifier which ensures this. This object is achieved by a method with the features of claim 1 or a method with the features of the independent claim 2 and a dehumidifier with the features of claim 3.
- the dependent claim 4 relates to a particularly advantageous development of the dehumidifier according to the invention.
- Both the method for dehumidification and the dehumidifier are based on the general inventive idea of eliminating the solenoid valve according to the prior art and instead of detecting the presence of an air flow in the dehumidifier and, if appropriate, its direction of flow and, in the case of a moisture sensor according to the state
- Figure 1 shows the schematic flow diagram of a first inventive method
- Figure 2 shows the schematic flow diagram of a second method according to the invention
- Figure 3 is a schematic view of a dehumidifier according to the invention
- the air humidity F r is measured by a moisture sensor known from the prior art, which is located spatially between the granulate-filled housing of the dehumidifier and the oil expansion vessel, and is subsequently compared with a predetermined limit value F max . If this limit value is reached or exceeded, the solenoid valve would be closed according to the prior art, the heating device would be controlled and the granules would be heated. In the case of the method according to the invention, however, it is additionally checked in such a case whether there is an air flow in the dehumidifier and, if so, in which direction it runs. The heating device is actuated only if there is no air flow or if there is an existing air flow to the outside, ie to the outside. The information from the (known) moisture sensor for actuating the heating device is thus linked to further information about the air flow.
- FIG. 2 A further method according to the invention is shown schematically in FIG. 2, in which if the result of a comparison of the measured air humidity F r with the limit value F max determines whether this limit value has been reached or exceeded, a comparison of the pressure P u in the pipeline before the Dehumidifier and the external pressure P a is made. Only if, in addition to the excessive air humidity, the pressure P u is greater than or equal to the external pressure P a is the heating device actuated, and the granules are heated and returned to the moisture-absorbing state.
- FIGS. 3 and 4 A dehumidifier according to the invention is shown in FIGS. 3 and 4 and is described in more detail below.
- the dehumidifier according to the invention has an upper flange 1 and a lower closure cap 2; in between is a housing 5, a cylinder made of Duran glass is particularly suitable for this.
- the lower cap 2 is particularly advantageously made of metal or another material with good specific thermal conductivity and has a funnel-shaped inner contour. Through this design of the lower cap 2 with its good specific heat conduction, a defined, locally limited condensation of the heated liquid is achieved. This is particularly because the cylinder 5 made of Duran glass has a much poorer thermal conductivity.
- a filter 3 made of sintered bronze with a brass base is provided, through which the condensed Liquid can escape downwards.
- An interface housing 4 is arranged on the side.
- This interface housing 4 is fastened by means of a spring washer 7 and cylinder screw 15.
- the housing 5 is sealed by lower and upper sealing rings 8 against the flange 1 and the lower cap 2.
- Inside the housing 5 there is a granule housing 20 which is filled with granules 23 and has a heater 10 inside.
- a screwed connection by means of cheese head screw 12 with a spacer washer 21 is provided at the top of the flange 1; from below, the granulate housing 20 with the heater 10 is held by threaded rods 14 which are guided vertically through the lower sealing cap 2.
- the fixation in the horizontal position is done by nuts 16; Spring washers 24 are still inserted.
- the lower fastening of the closure cap 2 takes place by means of knurled nuts 18 screwed onto the threaded rods 14.
- an insulating ring 9 is also provided.
- the reference numeral 22 designates an only indicated female connector.
- a double screw connection 25 which interacts with a screw connection of the flange 1
- a screw connection 26 is provided with a connecting flange 27 fastened thereby, which in turn, this is not shown here, the connection to the oil expansion vessel manufactures.
- a moisture sensor 28 known from the art and additionally a relative pressure sensor 29 according to the invention are screwed in.
- the electrical connection lines are only indicated.
- the moisture sensor 28 detects the moisture state of the air flowing around it. If the detected moisture value exceeds a previously set limit value, this means that the granules 23 in the interior of the granulate housing 20 are at least largely saturated, no further moisture is absorbed and must be dried out.
- the relative pressure sensor 29 additionally arranged according to the invention provides additional information as to whether or not the pressure P u inside the dehumidifier is greater than or equal to the external pressure P a . If this is the case, the additional necessary condition for switching on the heater 10 is fulfilled and the granulate 23 is heated.
- the interaction of the humidity sensor 28 and the relative pressure sensor 29 thus ensures that the heating 10 is only switched on when the humidity sensor 28 signals that a moisture limit value has been exceeded and the relative pressure sensor 29 also signals that there is either no air flow in the dehumidifier - this is the case If Pu is equal to P a - or if there is an air flow directed outwards from the oil expansion vessel - this is the case if P u is greater than P a . If this additional condition, detected by the relative pressure sensor 29, is not met, it is generally not baked out, however high the humidity of the air inside may be.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Gases (AREA)
- Drying Of Solid Materials (AREA)
- Air Humidification (AREA)
- Transformer Cooling (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/576,157 US7468091B2 (en) | 2003-12-06 | 2004-12-03 | Method for dehumidifying air and air dehumidifier for oil-insulated transformers, reactance coils and step switches |
KR1020067011062A KR101056490B1 (ko) | 2003-12-06 | 2004-12-03 | 오일-충진된 트랜스포머, 리액턴스 코일 및 스텝 스위치에 대해 공기의 습기를 제거하기 위한 방법 및 공기 습기제거기 |
DE502004007335T DE502004007335D1 (de) | 2003-12-06 | 2004-12-03 | Verfahren zur luftentfeuchtung und luftentfeuchter für ölisolierte transformatoren, drosselspulen sowie stufenschalter |
CN2004800282106A CN1860563B (zh) | 2003-12-06 | 2004-12-03 | 用于油绝缘的变压器、扼流圈以及分接开关的空气干燥方法和空气干燥器 |
CA2548618A CA2548618C (en) | 2003-12-06 | 2004-12-03 | Method for dehumidifying air and air dehumidifier for oil-insulated transformers, reactance coils and step switches |
EP04803496A EP1690267B1 (de) | 2003-12-06 | 2004-12-03 | Verfahren zur luftentfeuchtung und luftentfeuchter für ölisolierte transformatoren, drosselspulen sowie stufenschalter |
JP2006541909A JP2007513508A (ja) | 2003-12-06 | 2004-12-03 | 油絶縁された変圧器、チョーキングコイルならびにタップ切換装置のための除湿方法及び空気除湿機 |
HK06111260A HK1093816A1 (en) | 2003-12-06 | 2006-10-12 | Method for dehumidifying air and air dehumidifier for oil-insulated transformers, reactance coils step switch |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10357085.3 | 2003-12-06 | ||
DE10357085A DE10357085B3 (de) | 2003-12-06 | 2003-12-06 | Verfahren zur Luftentfeuchtung und Luftentfeuchter für ölisolierte Transformatoren, Drosselspulen sowie Stufenschalter |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005055255A1 true WO2005055255A1 (de) | 2005-06-16 |
Family
ID=34202456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/013774 WO2005055255A1 (de) | 2003-12-06 | 2004-12-03 | Verfahren zur luftentfeuchtung und luftentfeuchter für ölisolierte transformatoren, drosselspulen sowie stufenschalter |
Country Status (12)
Country | Link |
---|---|
US (1) | US7468091B2 (de) |
EP (1) | EP1690267B1 (de) |
JP (1) | JP2007513508A (de) |
KR (1) | KR101056490B1 (de) |
CN (1) | CN1860563B (de) |
AT (1) | ATE397783T1 (de) |
CA (1) | CA2548618C (de) |
DE (2) | DE10357085B3 (de) |
ES (1) | ES2303961T3 (de) |
HK (1) | HK1093816A1 (de) |
PT (1) | PT1690267E (de) |
WO (1) | WO2005055255A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009019733A1 (en) * | 2007-08-07 | 2009-02-12 | Comem S.P.A. | Improved drier for dehumidifying the air intended for oil expansion tank used in electrical equipments |
US7563310B2 (en) * | 2003-04-04 | 2009-07-21 | Maschinenfabrik Reinhausen Gmbh | Air dehumidifier for oil-insulated transformers, choke coils and steps switches |
JP2009528156A (ja) * | 2006-03-02 | 2009-08-06 | マシイネンフアブリーク・ラインハウゼン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | 除湿装置の乾燥方法 |
WO2011099046A1 (en) | 2010-02-12 | 2011-08-18 | Abb S.P.A. | Process for controlling dryer capable of dehumidifying air entering the oil expansion vessels used in electrical appliances |
EP2514511A1 (de) | 2011-04-20 | 2012-10-24 | ABB Technology AG | Luftdehydrierende Entlüftungseinrichtung zur Bereitstellung von entfeuchteter Luft für Elektrogeräte und zugehöriges Verfahren |
KR20140088022A (ko) * | 2012-12-31 | 2014-07-09 | 퀄리트럴 컴퍼니 엘엘씨 | 통기 장치 내의 건조제를 재생하는 방법 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE492893T1 (de) | 2008-04-28 | 2011-01-15 | Abb Technology Ltd | Verfahren und vorrichtung zur bestimmung der relativen feuchtigkeit eines mit isolierender flüssigkeit gefüllten elektrischen gerätes |
JP5377527B2 (ja) * | 2011-01-14 | 2013-12-25 | 中国電力株式会社 | 吸湿呼吸器 |
CN102290199B (zh) * | 2011-05-09 | 2013-01-16 | 华东理工大学 | 多通道可切换电加热干燥器 |
CN102886191B (zh) * | 2011-07-22 | 2014-10-01 | 上海智瑞达电气科技有限公司 | 一种用于对进入电气设备油膨胀箱空气进行干燥的空气干燥装置 |
CN105582789A (zh) * | 2014-11-15 | 2016-05-18 | 湖北汽车工业学院 | 一种带湿度调节装置的车用空气干燥器 |
CN106228766B (zh) * | 2016-09-13 | 2018-05-22 | 国网山东省电力公司德州供电公司 | 变压器呼吸器显示预警系统 |
DE102018213341A1 (de) * | 2018-08-08 | 2020-02-13 | Siemens Aktiengesellschaft | Ermittlung des Feuchteintrags in ein Trocknungsmittel bei Transformatoren |
EP3789103B1 (de) * | 2019-09-04 | 2022-04-13 | COMEM S.p.A. | Entlüftervorrichtung zur trocknung von luft welche in einen entspannungsbehälter einer elektrische leistungseinrichtung gespeist wird |
CN113695311A (zh) * | 2020-11-10 | 2021-11-26 | 景能科技有限公司 | 一种电气滑环清洗装置及方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60198710A (ja) * | 1984-03-23 | 1985-10-08 | Toshiba Corp | 油入電器の吸湿呼吸装置 |
US5902381A (en) * | 1997-05-30 | 1999-05-11 | General Signal Corporation | Dehydrating breather apparatus |
US20030089238A1 (en) * | 2001-11-13 | 2003-05-15 | Messko Albert Hauser Gmbh & Co. Kg | Air demoisturizer for oil-insulated transformers, chokes and tap changers |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1476138A (en) * | 1923-12-04 | Transformer | ||
US1759971A (en) * | 1924-09-22 | 1930-05-27 | Ohio Brass Co | Apparatus for controlling breathing of oil-containing housings |
US1601308A (en) * | 1924-10-14 | 1926-09-28 | Westinghouse Electric & Mfg Co | Indicating dehydrator |
JPS6076013U (ja) * | 1983-10-31 | 1985-05-28 | 株式会社東芝 | 油入電器の吸湿呼吸装置 |
JPS6375009U (de) * | 1986-11-06 | 1988-05-19 | ||
CN87208681U (zh) * | 1987-05-26 | 1988-08-10 | 云南省电子工业局试验研究所 | 高压充油设备防潮装置 |
JPH10135043A (ja) * | 1996-10-30 | 1998-05-22 | Nippon Koei Co Ltd | 吸湿呼吸器における吸湿剤の取出装置およびその取出装置を有する吸湿呼吸器 |
US6800114B2 (en) * | 2002-08-07 | 2004-10-05 | Andrew Corporation | Pressure equalization apparatus and methods |
US7332015B2 (en) * | 2002-09-06 | 2008-02-19 | Waukesha Electric Systems, Inc | Automatic dehydrating breather apparatus and method |
-
2003
- 2003-12-06 DE DE10357085A patent/DE10357085B3/de not_active Expired - Fee Related
-
2004
- 2004-12-03 EP EP04803496A patent/EP1690267B1/de not_active Not-in-force
- 2004-12-03 DE DE502004007335T patent/DE502004007335D1/de not_active Expired - Fee Related
- 2004-12-03 CA CA2548618A patent/CA2548618C/en not_active Expired - Fee Related
- 2004-12-03 PT PT04803496T patent/PT1690267E/pt unknown
- 2004-12-03 ES ES04803496T patent/ES2303961T3/es active Active
- 2004-12-03 JP JP2006541909A patent/JP2007513508A/ja active Pending
- 2004-12-03 AT AT04803496T patent/ATE397783T1/de active
- 2004-12-03 WO PCT/EP2004/013774 patent/WO2005055255A1/de active IP Right Grant
- 2004-12-03 CN CN2004800282106A patent/CN1860563B/zh not_active Expired - Fee Related
- 2004-12-03 US US10/576,157 patent/US7468091B2/en not_active Expired - Fee Related
- 2004-12-03 KR KR1020067011062A patent/KR101056490B1/ko not_active IP Right Cessation
-
2006
- 2006-10-12 HK HK06111260A patent/HK1093816A1/xx not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60198710A (ja) * | 1984-03-23 | 1985-10-08 | Toshiba Corp | 油入電器の吸湿呼吸装置 |
US5902381A (en) * | 1997-05-30 | 1999-05-11 | General Signal Corporation | Dehydrating breather apparatus |
US20030089238A1 (en) * | 2001-11-13 | 2003-05-15 | Messko Albert Hauser Gmbh & Co. Kg | Air demoisturizer for oil-insulated transformers, chokes and tap changers |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 042 (E - 382) 19 February 1986 (1986-02-19) * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7563310B2 (en) * | 2003-04-04 | 2009-07-21 | Maschinenfabrik Reinhausen Gmbh | Air dehumidifier for oil-insulated transformers, choke coils and steps switches |
JP2009528156A (ja) * | 2006-03-02 | 2009-08-06 | マシイネンフアブリーク・ラインハウゼン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | 除湿装置の乾燥方法 |
WO2009019733A1 (en) * | 2007-08-07 | 2009-02-12 | Comem S.P.A. | Improved drier for dehumidifying the air intended for oil expansion tank used in electrical equipments |
WO2011099046A1 (en) | 2010-02-12 | 2011-08-18 | Abb S.P.A. | Process for controlling dryer capable of dehumidifying air entering the oil expansion vessels used in electrical appliances |
EP2514511A1 (de) | 2011-04-20 | 2012-10-24 | ABB Technology AG | Luftdehydrierende Entlüftungseinrichtung zur Bereitstellung von entfeuchteter Luft für Elektrogeräte und zugehöriges Verfahren |
WO2012143285A1 (en) | 2011-04-20 | 2012-10-26 | Abb Technology Ag | Air dehydrating breather assembly for providing dehumidified air to electrical devices, and related method |
US9108149B2 (en) | 2011-04-20 | 2015-08-18 | Abb Technology Ag | Air dehydrating breather assembly for providing dehumidified air to electrical devices, and related method |
KR20140088022A (ko) * | 2012-12-31 | 2014-07-09 | 퀄리트럴 컴퍼니 엘엘씨 | 통기 장치 내의 건조제를 재생하는 방법 |
KR102188548B1 (ko) | 2012-12-31 | 2020-12-08 | 퀄리트럴 컴퍼니 엘엘씨 | 통기 장치 내의 건조제를 재생하는 방법 |
Also Published As
Publication number | Publication date |
---|---|
DE10357085B3 (de) | 2005-03-17 |
CN1860563B (zh) | 2011-04-13 |
DE502004007335D1 (de) | 2008-07-17 |
EP1690267B1 (de) | 2008-06-04 |
EP1690267A1 (de) | 2006-08-16 |
CN1860563A (zh) | 2006-11-08 |
CA2548618A1 (en) | 2005-06-16 |
JP2007513508A (ja) | 2007-05-24 |
HK1093816A1 (en) | 2007-03-09 |
CA2548618C (en) | 2013-01-15 |
KR101056490B1 (ko) | 2011-08-11 |
ES2303961T3 (es) | 2008-09-01 |
ATE397783T1 (de) | 2008-06-15 |
US20070199443A1 (en) | 2007-08-30 |
KR20060126634A (ko) | 2006-12-08 |
US7468091B2 (en) | 2008-12-23 |
PT1690267E (pt) | 2008-06-23 |
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