CN105612586B - Dehydrating breather in electrical equipment - Google Patents
Dehydrating breather in electrical equipment Download PDFInfo
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- CN105612586B CN105612586B CN201480034509.6A CN201480034509A CN105612586B CN 105612586 B CN105612586 B CN 105612586B CN 201480034509 A CN201480034509 A CN 201480034509A CN 105612586 B CN105612586 B CN 105612586B
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- adsorbent element
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- 239000012530 fluid Substances 0.000 claims abstract description 156
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 239000003463 adsorbent Substances 0.000 claims abstract description 102
- 239000000463 material Substances 0.000 claims abstract description 99
- 238000010292 electrical insulation Methods 0.000 claims abstract description 72
- 239000002245 particle Substances 0.000 claims description 39
- 239000003921 oil Substances 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 13
- 239000002250 absorbent Substances 0.000 claims description 12
- 230000002745 absorbent Effects 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 150000002148 esters Chemical class 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000002480 mineral oil Substances 0.000 claims description 7
- 235000010446 mineral oil Nutrition 0.000 claims description 7
- 239000010696 ester oil Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 3
- 150000002632 lipids Chemical class 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229920005615 natural polymer Polymers 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 239000001913 cellulose Substances 0.000 description 11
- 229920002678 cellulose Polymers 0.000 description 11
- 239000007788 liquid Substances 0.000 description 11
- 238000009413 insulation Methods 0.000 description 10
- 239000000123 paper Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000004804 winding Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 239000000741 silica gel Substances 0.000 description 5
- 229910002027 silica gel Inorganic materials 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- -1 e.g. Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229940099259 vaseline Drugs 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 206010000234 Abortion spontaneous Diseases 0.000 description 1
- 108010059892 Cellulase Proteins 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 241000009298 Trigla lyra Species 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 229940106157 cellulase Drugs 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 208000015994 miscarriage Diseases 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 208000000995 spontaneous abortion Diseases 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- 230000010148 water-pollination Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Transformer Cooling (AREA)
Abstract
Present disclosure is related to the electrical equipment (1) that one kind is configured to include electrical insulation fluids (3); the electrical equipment includes the water adsorbent element (11) protected by waterproof material (12); waterproof material (12) prevents water adsorbent element from being absorbed water from its surrounding environment, and the waterproof material can be dissolved by electrical insulation fluids.
Description
Technical field
Present disclosure is related to a kind of electrical equipment including hygroscopic element.
Background technology
Liquid or gaseous electrical insulation fluids make in electrical equipment such as transformer, capacitor, switching device, sleeve pipe
With, and with a large amount of functions.Insulative dielectric fluid is typically used as the separated electric insulation in the part with different potentials in equipment
Medium, and as the heat generated in other parts of the cooling medium to transmit current carrying conductor and equipment.In addition, the analysis of fluid is carried
The means of the health status of monitoring electrical equipment are during operation supplied.
In addition to basic function mentioned above, dielectric fluid should also be as meeting other required and desired requirement.Fluid
The ambient influnence of high efficiency, long operation lifetime time and minimum should be contributed to when for electrical equipment.In addition, fluid is necessary
With the material compatible used in electrical equipment, and its should not constitute personnel health and safety danger.In fact, dielectric fluid
Various physics, electricity and chemical attribute should be showed.It is most of by providing each required standard in these attributes
Adjusted with specification.
Traditionally, the oil based on oil already functions as the dielectric fluid in the transformer of fluid filling, and this is primarily due to
There are advantageous attributes on low viscosity, low pour point, high dielectric strength, easy availability and low cost.Recently, ester liquid becomes ore deposit
The substitute of thing oil.Ester is due to its high biological degradability and high-flash/flash-point (300 DEG C of ＞) but favourable.
Therefore electrical insulation fluids are additionally operable to having in load tap changer (OLTC) in power transformer.Tap changer is used
In power transformer, to select voltage by switching between the different taps of winding, therefore change the ratio between winding
Rate.
OLTC will make its oily spatial expansion and contraction at different temperatures.This is completed by oily expansion vessel, and its is usual
Ventilated via silica gel breather, to avoid moisture from entering in oily space.
Anyway have been illustrated with OLTC over time all may be by moisture accumulation in oil, and therefore need
Regular drying or replaced oil.Period before water capacity will be too high in oil depends on a number of factors, e.g., ambient climate,
The installation of OLTC and silica gel breather, the maintenance performed on silica gel, and depending in the oily spaces of OLTC of operating condition
Temperature change.
If would be possible to extension oil containing the period before excess moisture, this will be very beneficial.
Moisture will enter the oily spaces of OLTC in a different manner over time during operation or during safeguarding.
Insulating oil that high water capacity is unfavorable in OLTC and the insulating polymer (for example, polyester complexes or epoxy compound) that uses
Insulating properties.Enter to resist moisture in oil, silica gel breather and its maintenance have been aimed in this area.
By addition can be adapted to scope in moisture absorption one piece of hygroscopic material, e.g., cellulose/paper, oil can the long period
Interior holding drying.Therefore, in Water in oil amount too high (for example, water higher than 35ppm) or close to before saturated level, Geng Duoshui
It can be introduced into system.The balance between water and paper in oil is known from so-called Piper curves.
OLTC is generally transported without oily situation, and then fills oil in its test or before being operated.
EP 0 481 239 discloses the conduct that a kind of oil particularly for tap power transformer fills tap changer
The oil filter of the component of single filter circuit, the oil filter has two filter chambers being disposed concentrically upon, for example, in labyrinth shape
Formula.In the case, outer filter chamber is used to filter out solid impurity, for example, by means of filter paper or mineral wool, and interior filter chamber is filled with suction
Water material, such as zeolite, and for obtaining the water in oil.
US 5,766,464 discloses a kind of oil filtering system for the electrical equipment for being used for oil filling.Pump is passed through for pumping oil
Filtering tube, in the catheter, pollutant are filtered out from oil.If it is desire to being removed from the oil moisture, then filter medium may include to do
Paper or ion exchange resin, e.g., Dowex
CN 202134324 (utility model) discloses a kind of oil conservater of on load voltage regulation switch.Switch include via
Connecting tube is connected to the dehydrating breather on storage cabinet.
JP 2007/221047 discloses a kind of power transformer, and it can continuously be shown excellent by offer
Dehumidification ability absorbent come from fluid insulation thing safely remove moisture and in longer period manage fluid insulation thing.
The absorbent that can freely take apart is used to provide continuously to dry.
The content of the invention
It is an object of the invention to provide a kind of improved moisture sorbing system for electrical equipment.
According to an aspect of the invention, there is provided a kind of electrical equipment for being configured to include electrical insulation fluids, the electricity
Gas equipment includes the water adsorbent element protected by waterproof material, and waterproof material prevents water adsorbent element from being absorbed water from its surrounding environment, described
Waterproof material is dissolved at least in part by electrical insulation fluids.Therefore, waterproof material protection water adsorbent element, until its be immersed in it is described
In electrical insulation fluids.
According to another aspect of the present invention there is provided the electricity in a kind of tap changer from for power transformer absolutely
The method that edge fluid removes moisture and particle, this method includes：Heated with the heat by the electric switch generation in tap changer
A part for electrical insulation fluids, the nature that thus the upward stream of electrical insulation fluids passes through the electrical insulation fluids in tap changer
Circulation is produced；The upward stream of cooling, thus downward the flowing of electrical insulation fluids passes through the electrical insulation fluids in tap changer
Natural Circulation is produced；And by least some granule capturings carried by upward stream and/or downward stream in tap changer
In water adsorbent element in, at least a portion of stream passes through the water adsorbent element due to Natural Circulation, so as to be removed from electrical insulation fluids
The particle (and moisture).
By the water adsorbent element protected by means of waterproof material, protect water adsorbent element electric from being added in dielectric fluid
Become to be partially filled with such as moisture from air before equipment.Certainly, come if then water adsorbent element is also prevented from absorbing
The moisture (this is the reason for using water adsorbent element) of self-insulating fluid, or if the interlayer of protection waterproof material must for example use hand
(this would also mean that water adsorbent element will need to provide easy access to) is removed, then this itself will be problematic.However, with regard to the present invention
Speech, this is not problem, because waterproof material is dissolved/is dissolved in electrical insulation fluids by electrical insulation fluids.Therefore, water adsorbent element exists
Discharged when waterproof material no longer needs from waterproof material, it is allowed to which water adsorbent element performs its effect absorbed water from electrical insulation fluids.
In certain embodiments, water adsorbent element is soaked with waterproof material.In some other embodiments, wherein water adsorbent element bag
It is trapped among in the packaging being made up of waterproof material or film.In some other embodiments, waterproof material is adhered to the surface of water adsorbent element
On.In certain embodiments, water adsorbent element is enclosed in is held in place (for example, glued around water adsorbent element by means of waterproof material
In waterproof cover together), thus shell will be opened when waterproof material is dissolved by dielectric fluid.This is beneficial to reduction and is dissolved in
The amount of waterproof material in dielectric fluid, to reduce the influence of its attribute to dielectric fluid.It can be devised, by means of anti-
Some or all of in these different modes of water material protection water adsorbent element can be combined in some cases.Which kind of mode used
It for example may depend on waterproof material and/or the attribute of water adsorbent element, thereby increases and it is possible to dissolved by electrical insulation fluids depending on waterproof material
Easy degree.In certain embodiments, water adsorbent element is positioned in its dedicated chamber, for example, metallic room, non-molten for avoiding
The shell parts of solution property or the waterproof material interference electrical equipment not being completely dissolved also.
In certain embodiments, waterproof material can be flowed under the usual operating conditions of electrical equipment in one week by electric insulation
Body is completely dissolved, such as in 48 or 24 hours.It is expedient to, waterproof material will not easily dissolve very much, because this can cause waterproof
Material is prematurely at least partly removed.In view of the operating time of such as power transformer, interior dissolving in one week can be enough.Example
Such as, the period for being completely dissolved waterproof material can be by selecting waterproof material and/or being controlled by amount/thickness of waterproof material
System.
In some cases, waterproof material does not significantly change the electricity of electrical insulation fluids when being dissolved in electrical insulation fluids
Insulation attribute.For example, the example of this generic attribute includes dielectric strength, dielectric loss factor, viscosity, acidity etc., such as, it is undesirable to
Due to waterproof material dissolving to be reduced to the resistance or thermal resistance of dielectric fluid wherein.
In certain embodiments, will not when waterproof material is dissolved in electrical insulation fluids under the mode of operation of electrical equipment
Corrode metal.Because electrical equipment is at least partly made up of technology (for example, iron or copper), therefore it would not be desirable that electrical insulation fluids exist
Increase corrosivity when waterproof material is dissolved in wherein.
In certain embodiments, waterproof material is wax or lipid, e.g., vaseline or synthesis or natural polymer, or ore deposit
Thing oil or the material based on ester.This material can be easily used in conjunction with the invention.Technical staff can be based on present disclosure, for example
Depending on the operating condition of the attribute of water adsorbent element, the attribute of electrical insulation fluids and/or electrical equipment, find what be may also be adapted to
Other materials.Generally, waterproof material should be selected so that it is dissolved in dielectric fluid (for example, mineral oil or based on ester
Liquid) in, while waterproof (solubility is low in water).Many materials in oil but insoluble in water are for example dissolved in the presence of known
Material, for example, vaseline, it is provided as this paper particular instance.Therefore technical staff does not have any in terms of material is found
Problem.In addition, the waterproof material that technical staff can be found suitable for by normal experiment, for example, by the dielectric fluid used
The middle solubility for testing some known waterproof materials.
In certain embodiments, electrical equipment is the system with least 1 kilovolt or at least 1.5 kilovolts of system voltage.
It can be in high voltage applications, and wherein it is most harmful when the insulating properties of dielectric fluid are endangered by high water capacity.In some realities
Apply in example, system voltage reaches 800 kilovolts, for example, between 2 or 3 kilovolts to 500 or 800 kilovolts.
In certain embodiments, electrical equipment is power transformer or motor.These are that the present invention can be adapted to use
The example of fluid insulation electrical equipment.
In certain embodiments, electrical equipment is to have load tap changer for power transformer.Tap changer is
It is contemplated that the particular instance that the present invention can be particularly useful.The tap changer of power transformer normally partially or is entirely disposed in
In single container, its internal flow is not contacted with the cellulose insulation thing of power transformer or not influenceed by it.This is special
It is work because the dehydrating breather in transformer tank can not combine such as it the reason for using water adsorbent element in tap changer
When it is effective like that effectively or as the cellulose (paper) of several (for example, hundreds of or thousands of) kilogram.The cellulose of power transformer
Insulant and then controllable wetting balance., generally may be without any cellulose (paper), because it may in tap changer
It is not suitable insulant therein, because it can produce wear debris, and tap-change by the Mechanical Moving of tap changer
The of a relatively high risk of the moisture in cellulose in device may be very bad in tap changer.Because tap changer is logical
Often do not include paper, even if therefore fluid space therein relatively easily influenceed by seldom moisture, why this can be by dry fibre if being
Tie up the reason for plain or other absorbent materials introduce particularly useful in the tap changer according to the present invention.It would thus be advantageous to energy
For example using cellulose enough in equipment such as tap changer, wherein absorbent material need not have dielectric insulation performance, but can
It is changed to be mainly used in moisture absorption.
In some embodiments, electrical insulation fluids are or including oil, such as mineral oil or ester oil.In certain embodiments, it is based on
The fluid of ester, is normally based on the liquid such as ester oil of ester, can by its higher heat resistance but it is preferred that.Electrical insulation fluids can
For the transformer or the Conventional insulation liquid (for example, oil) of other electrical equipments filled for liquid.As being also mentioned that above,
In background parts, oil and ester liquid of the insulative dielectric fluid such as based on oil are known for use as electrical insulation fluids.Therefore, this area
The type and its operating condition (for example, operation temperature) that technical staff depends on electrical equipment select suitable electrical insulation fluids will
There is no any problem.
In certain embodiments, water adsorbent element includes hygroscopic polymeric material, e.g., based on cellulose (for example, paper or paper
Plate), the absorbent material based on polyacrylamide or based on silica (silica gel/pearl), or cotton or clay.These are workable
The example of hygroscopic material.In some embodiments of the invention, water adsorbent element is also arranged in from electrical insulation fluids removing/trapping
Grain.Cellulose is the example for the absorbent material for going back arrested particles.Absorbent material is well known in the present art, for example, from the above
The document mentioned in background parts.The suitable attribute of water adsorbent element such as cellulase type, molecular weight, granularity etc., from commercially available suction
Aquatic products (also referred to as drier) are known.Technical staff can be based on present disclosure, such as depending on the attribute of waterproof material, electricity
The attribute of dielectric fluid and/or the operating condition of electrical equipment, find the other materials that may also be adapted to.Generally, absorb water member
Part may include all there is significantly higher hydrophily compared with dielectric fluid has under all operation temperatures of electrical equipment.
The amount of absorbent material in water adsorbent element is for example depending on the free space in electrical equipment.The absorbent material used is more, then
Use time that can be available for the water adsorbent element absorbed water in the electrical apparatus before it for example needs to change is more long.Generally,
Same amount of absorbing material can be used as the conventional water absorption element being used for now in electrical equipment, possible or even less, because by
In the present invention, water adsorbent element has not been to be full of water in the forward part for contacting dielectric fluid.For example, it can be used and correspond to electricity
The water-absorption material doses of 0.5% to the 5% of the volume of electrical insulation fluids in gas equipment.In certain embodiments, water adsorbent element can inhale
Water between 0.01 to 1 liter of the electrical insulation fluids for receiving every cubic metre (between such as 0.1 to 1 liter).This represents water adsorbent element with one
Quantitative/size is present so that so many moisture is can absorb under the operating condition of electrical equipment.Certainly, multiple single suctions
Water element may be present in same equipment.
Generally, all terms used in claim all according to its common meaning of technical field understand, unless
Clearly limit in addition herein.All " the one/a kind of/element, equipment, component, device, steps etc. " mentioned are all openly
Be understood to mean that at least one example of element, equipment, component, device, step etc., unless clearly it is further noted that.This paper institutes
The step of any method stated, need not all be performed with disclosed exact order, unless explicitly stated otherwise.For present disclosure not
" first ", " second " that same feature/component is used etc. is only intended to distinguish feature/component with other similar feature/components,
And do not give any order or rank to feature/component.
Brief description of the drawings
Embodiment will be described with reference to by way of example, in the accompanying drawings：
Fig. 1 is the schematic block diagram of the embodiment of the power transformer according to the present invention；
Fig. 2 is the schematic diagram of the embodiment of the tap changer according to the present invention.
Embodiment
Embodiment will be described with reference to more fully below now, shown in the drawings of some embodiments.So
And, may be scope of the present disclosure interior in many various forms of other embodiments.On the contrary, following examples are by way of example
Mode is provided, so that present disclosure is by be thorough and complete, and will scope of the present disclosure be fully conveyed to this area
Technical staff.Similar numeral represents similar components everywhere in description.
Electrical equipment this is defined herein as any equipment for being configured to may be connected to electric current/conduction electric current.
Fig. 1 is the sketch of the embodiment of the electrical equipment of the invention for the form for being here power transformer 1.Power transformer
Device 1 has the housing 2 for the electric part for accommodating the power transformer being immersed in dielectric fluid 3.For example, according to as described herein
Its any embodiment, electrical insulation fluids 3 are mineral oil or the liquid based on ester.At the top of power transformer 1, gas (example
Such as, air) phase 6 may be present in housing and liquid fluid 3 top face.The electric part of power transformer 1 is included by electricity
Metal-cored the 4 of the wrapping of coil/winding 5 of wire 8 and 10.Tap changer (being schematically shown at 13) can be used for being switched to winding
Diverse location in 5, for adjusting the voltage of power transformer 1.Tap changer 13 includes compartment, and it is by tap changer
The remainder of interior dielectric fluid and the dielectric fluid 3 in transformer 1 is separated.In the very simplified diagram of accompanying drawing, enter
Electric lead 8 enter via sleeve pipe 7 in housing 2, and the electric lead 10 left leaves housing 2 via sleeve pipe 10.Wherein use this
The transformer 1 or other electrical equipments of fluid 3 for example can be high temperature or high-tension electricity transformer, or high-tension motor or other high
Equipment is pressed, it is arranged to operate at a temperature of the normal running temperature of dielectric fluid derived from higher than mineral oil, for example, being higher than
160 DEG C, 180 DEG C or the operation temperature higher than 200 DEG C.
In transformer 1, water adsorbent element 11 is positioned to contact with electrical insulation fluids 3.Water adsorbent element 11 (is for example alternatively referred to as
Dehydrating breather) any position for can be positioned in electrical equipment 1, in this place, it can easily absorb moisture, and without prejudice to equipment 1
Normal operating.According to some embodiments of the present invention, water adsorbent element can also function to filter or grain catcher, for
Trap and therefore remove the particle from dielectric fluid 3.It can reduce also by the abrasion except degranulation, equipment, because particle can
It is absorbed in the movable part of equipment and causes friction.Remove moisture and except both degranulations can extend dielectric fluid 3 may be necessary
Time before replacing.For example, water adsorbent element 11 can be located in the tap changer of power transformer 1, so as in extension
Fluid 3 therein is kept to dry in period.Also as described above, electrical equipment 1 and can not always be filled with dielectric fluid 3.
On the contrary, it can be in the situation transport without fluid, thus fluid can be added then when equipment investment is operated with.Therefore, exist
,, can from the manufacture or maintenance of equipment when water adsorbent element can be added or be dried before fluid (for example, oil) 3 is added in equipment 1
There is the long period.During this time, what is existed is a risk that, water adsorbent element 11 for example absorbs moisture from around its air
(that is, water), therefore water adsorbent element 11 is reduced for its from the moisture absorption of dielectric fluid 3 it is expected that the ability used.
According to the present invention, water adsorbent element 11 is with preventing/preventing the waterproof material 12 that water adsorbent element absorbs water from its surrounding environment
It is associated.For example, water adsorbent element 11 can be coated with by waterproof material 12, or otherwise it is enclosed in waterproof material 12, or its
Waterproof material 12 can be soaked with.Interrelational form between waterproof material 12 and water adsorbent element 11 can be based on the waterproof material 12 of selection
Attribute is selected.Polymers/plastics waterproof material 12 for example may be produced that water adsorbent element 11 can be enclosed in packaging therein or film.
For example, wax or lipid may be adapted to be coated on the surface of water adsorbent element 11, or it is impregnated into water adsorbent element 11 (if water adsorbent element
11 be the porous material suitable for being impregnated with, for example, cellulosic material, such as Paper or cardboard).According to the present invention, waterproof material 12 can
It is dissolved in dielectric fluid 3, equipment 1 is configured to be filled with the dielectric fluid 3.Once this represents equipment filling fluid 3, then fluid
The water adsorbent element 11 that 3 contacts are protected by waterproof material 12, waterproof material 12 begins to dissolve in dielectric fluid, finally no longer hindered
Only/prevent water adsorbent element from (including dielectric fluid from the water suction of its surrounding medium now or being made up of dielectric fluid).Generally, absorb water member
Part 11 is then fully immersed in dielectric fluid 3, but in certain embodiments, its can only it is partially submerged wherein.Water adsorbent element
Then 11 freely perform it from the expectation function of dielectric fluid moisture absorption, and if be partially filled with for example from air than it
Moisture in the case of so do the longer time.
Fig. 2 schematically shows the embodiment of the tap changer 13 of present disclosure.Tap changer is configured to use
In power transformer 1, for switching between the different taps in the winding of transformer.Tap changer 13 includes housing
22, its surround tap changer to form the outer surface of tap changer, but still allow tap changer part (for example,
The part of switch 23) extend to outside housing 22.The housing 22 of tap changer 13 is filled with electrically insulating liquid 3, such as mineral oil
Or ester oil.Tap changer is configured to be positioned in transformer so that the switch 23 of tap changer 13 is arranged in tap-change
At the bottom section of device, at least partially in housing 22, thus dielectric fluid 3 can be heated by the electric member of such as switch, and
Rise in housing 22.Heated and therefore risen in housing 2 by fluid 3, is achieved that in the housing of tap changer
The Natural Circulation of fluid.The Natural Circulation causes the upward stream 25 of fluid 3, and adjacent downward stream 27.In Fig. 2 implementation
In example, the central longitudinal axis of upward stream 25 along housing 22 are produced in center, at the same the downward more periphery of stream 27 be located at shell
In body 22 (if housing is similar to cylinder).The water adsorbent element 11 for also being used as grain catcher is positioned in housing 22, is made
Obtain it and intercept fluid stream 3, it is allowed to which at least a portion of stream passes through water adsorbent element 11.According to the present invention, water adsorbent element 11 by its
Protected before being immersed in dielectric fluid 3 by waterproof material 12, then waterproof material 12 is dissolved by fluid 3, thus allows fluid
Contacted with the absorbent material of water adsorbent element 11.Water adsorbent element/grain catcher 11 can intercept fluid 3 upward stream 25 and/or
Downward stream 27.Water adsorbent element/grain catcher need not intercept whole stream 25 or 27, but expect to intercept as much as possible, so as to
Realize that effective moisture and/or particle are removed.Even if the only a part (being probably smaller portions) of fluid stream up or down
Through water adsorbent element/grain catcher 11, it is also enough to remove moisture/particle from fluid 3, because Natural Circulation and therefore flowing through
Water adsorbent element/grain catcher is continuous or occurred for each tap-change.Water adsorbent element 11 can catch for passive particle
Storage, its allow fluid 3 flow through its, thus granule capturing/be deposited in water adsorbent element.Water adsorbent element 11 for example may include
Filter, its mechanically arrested particles, and/or in the way of electrostatic or with other depending on the material for filter
Mode is combined or adsorption particle.In addition or as alternative, water adsorbent element may include labyrinth part, and it includes the material of arrested particles,
For example, in the way of electrostatic or otherwise with reference to/adsorption particle.As described above, for the water suction in water adsorbent element 11
Material also can at least arrested particles to a certain degree.Such as fruit instant, then additional particulate trapping material or function can also be used for water suction
In element 11.Therefore, water adsorbent element 11 can remove both moisture and particle from fluid 3, further extend dielectric fluid 3 and take out
The life-span of head converter 13.Due to no use pump and circulate only (or at least main) and carried out by Natural Circulation, it is therefore larger
Particle can allow to be deposited in tap changer, in this place, and they may be harmless because they not with fluid circulation, and will not
It is deposited on the solid insulating material in tap changer.Therefore, water adsorbent element 11 can mainly be arranged to what trapping will not be deposited
Little particle.This also extends the service life of water adsorbent element, because if less bulky grain is trapped, then it is by the particle that traps
Blocking is accomplished by more long.It is cellulose available for the suitable material in the water adsorbent element 11 of both trapping moisture and particle, but
Those skilled in the art may also be aware of other suitable absorbent materials, and it also can be to a certain extent from the trapping of dielectric fluid 3
Grain.
In fig. 2 in shown embodiment, fluid 3 is main by least one transition resistor 28 during the switching of switch 23
Heating, causes the stream 25 of the center of fluid upwards.When upward stream 25 is travelled upwardly, fluid cooling therein produces periphery
Downward stream 27.Optionally, the heat exchanger (not shown) at the top of tap changer 13 can be used for additionally cooling fluid
3。
In fig. 2 in shown embodiment, guiding piece 29 is used to additionally draw upward stream 25 and/or downward stream 27
It is directed at water adsorbent element 11 and control Natural Circulation.For example, guiding piece 9 can be substantially rotationally symmetrical, to form funnel downwards.
In fig. 2, upward stream 25 is shown and the Natural Circulation of downward stream 27 with arrow.As can be seen, 25 and 27 bases are flowed
In sheet it is parallel and it is neighbouring each other, but in opposite direction.However, when upward stream 25 passes through infundibulate guiding piece 29, guiding piece
29 can for example guide upward stream 25 and/or downward stream 27 by concentrating upward stream 25, and this is in the funnel 29 in Fig. 2
The arrow of upward stream 25 show.When upward stream 25 reaches the top of housing 22, the fluid 3 of Natural Circulation is cooled down, can
It can also be assisted by the cooling heat exchanger at the top of housing, and form a part for downward stream 27.Downward stream 27 is than collection
In to upstream 25 in more periphery, and therefore intercepted and guided by the outside of infundibulate guiding piece 29.Guiding piece 29 will be downward
The guiding of stream 27 is to water adsorbent element 11, and the element 11 is attached to the outside of guiding piece 29 in the embodiment of fig. 2.Water adsorbent element 11 can
Can be also substantially rotationally symmetrical, and be attached along the circumference of funnel 29.
In the exemplary embodiment, in Fig. 2 water adsorbent element 11 (may also serve as grain catcher) is attached to guiding piece
On 29, the downward stream 27 of the fluid 3 of the guiding Natural Circulation of guiding piece 29.In this embodiment, water adsorbent element 11 is labyrinth shape
Formula, at least a portion of downward stream 27 passes through the labyrinth part.Labyrinth part may include to be applied to moisture absorption and/or arrested particles are (outstanding
It is little particle, e.g., metal wear particles) material, e.g., cellulose.
According to an aspect of the invention, there is provided a kind of method.Tap changer 13 of this method in present disclosure
Embodiment in perform.A part for electrical insulation fluids 3 is given birth to by the transition resistor 28 of the electric switch in tap changer 13
Into heat heating, the Natural Circulation that thus the upward miscarriage 25 of electrical insulation fluids passes through the electrical insulation fluids in tap changer
It is raw.Upward stream 25 is intercepted and guided by the inner side for the infundibulate guiding piece 29 being arranged in tap changer 13 downwards,
Thus upward stream through infundibulate guiding piece by concentrating.Infundibulate guiding of the upward stream 25 in tap changer 13
The top of part 29 is cooled down, thus downward stream 27 the following naturally by the electrical insulation fluids in tap changer of electrical insulation fluids 3
Ring is produced.Downward stream 27 is intercepted and guided by the outside of infundibulate guiding piece 29, and thus the downward stream is drawn by guiding piece
Lead so that at least a portion of downward stream passes through the water adsorbent element 11 in tap changer 13.From in water adsorbent element 11 to
Under stream 27 carry at least some particles and moisture can be captured, so as to remove the particle from electrical insulation fluids 13.
In some embodiments of present disclosure, electric switch 23 includes at least one transition resistor 28, wherein
When tap changer is in use, the heat that Natural Circulation is generated by least one described resistor causes at least in part.Electricity
In hindering for switching, so as to the step short circuit of the winding in not making transformer when changing to another tap from a tap.Should
Resistance is referred to as transition resistance, and the generation heat at each tap changer, therefore causes Natural Circulation as described herein.In addition or
Alternately, more continuous resistance can be used for giving more continuous heating and Natural Circulation, but this needs to utilize higher energy.
According to present disclosure, transition resistance is enough to give sufficient circulation, but for example by means of the bottom section of tap changer at
The additional heating of heating element heater be also possible, and can be used in some embodiments of present disclosure.
In some embodiments of present disclosure, guiding piece 29 is positioned in housing 22, and is arranged to by following naturally
The stream 25,27 of electrical insulation fluids 3 caused by ring is guided to water adsorbent element 11 (possibly also as grain catcher).
In certain embodiments, guiding piece 29 is infundibulate.In certain embodiments, infundibulate guiding piece 29 is arranged to receive
Collection and the upward stream 25 for concentrating electrical insulation fluids, upward stream 25 and then are cooled down, and are formed to being positioned at infundibulate guiding piece
Outside intercept type water adsorbent element 11 downward stream 27.In certain embodiments, water adsorbent element 11 is attached to guiding piece 29
On.
In some embodiments of present disclosure, water adsorbent element 11 is the form of filter and/or labyrinth part.
In some embodiments of present disclosure, water adsorbent element 11 includes the fiber for trapping moisture and/or particle
Element.
In some embodiments of present disclosure, water adsorbent element 11 is configured to trapping with the typical grain less than 100 μm
The little particle of degree, is not clarifying particles, but most of particle will be less than 10 μm or even 1 μm.But the size of unclarified particle
Depending on the fluid viscosity used and actual grain density.
In some embodiments of present disclosure, tap changer 13 is configured for at least 1 kilovolt of system
In the power transformer of voltage.The need for higher voltage will increase dielectric power and clean surface, therefore except degranulation has higher
Importance.
Some other sides of present disclosure are hereafter paid close attention to.
There is provided the electric insulation in a kind of tap changer 13 from for power transformer 1 according to aspects of the present invention
The method that fluid 3 removes moisture and particle, this method includes：Given birth to using the resistor 28 of the electric switch 23 in tap changer
Into heat heat a part for electrical insulation fluids, thus the upward stream of electrical insulation fluids passes through electricity in tap changer absolutely
The Natural Circulation of edge fluid is produced；Allow the upward stream by the infundibulate guiding piece that is arranged in tap changer downwards
29 inner side is intercepted, and thus upward stream through infundibulate guiding piece by concentrating；Cool down the infundibulate in tap changer
The downward electrical insulation fluids flowed through in by tap changer of upward stream above guiding piece, thus electrical insulation fluids
Natural Circulation produce；Allow the downward stream by infundibulate guiding piece 29 outside intercept, thus the downward stream by
Guiding piece is guided so that at least a portion of downward stream passes through the water adsorbent element 11 in tap changer；And trap by inhaling
At least some particles that downward stream in water element 11 is carried, so as to remove the particle (and water from electrical insulation fluids
Point).
According to the aspect of present disclosure, there is provided a kind of tap changer 13 for power transformer 1, tap-change
Device includes：Heat for being generated using the electric switch 23 in tap changer heats the device of a part for electrical insulation fluids 3,
Thus the upward stream 25 of electrical insulation fluids is produced by the Natural Circulation of the electrical insulation fluids in tap changer；For cooling down
The device of upward stream 25, thus the downward stream 27 of electrical insulation fluids 3 by the electrical insulation fluids in tap changer from
So circulation is produced；And taken for trapping by the upward stream and/or downward stream in the water adsorbent element 11 in tap changer
The device of at least some particles of band, by it, at least a portion of stream is captured particle and/or because Natural Circulation passes through it
In, so as to eliminate the particle (and moisture) from electrical insulation fluids.
According to the aspect of present disclosure, there is provided a kind of tap changer 13 for power transformer 1, tap-change
Device includes：The housing 22 in the outside of tap changer is formed, the housing is configured to be filled with electrical insulation fluids 3；At least partly
Ground is positioned in housing and is configured to the electric switch 23 switched between the different taps of Transformer Winding；Water adsorbent element 11,
It is positioned in housing so that its by when tap changer is in use intercept by the electrical insulation fluids Natural Circulation
The stream of caused electrical insulation fluids.
By means of embodiments of the invention, water adsorbent element 11 can be used for not only removing moisture, but also at least to a certain degree
On from the dielectric fluid 3 in electrical equipment (for example, tap changer of transformer) remove degranulation.It can also advantageously pass through
Using the Natural Circulation of the fluid in tap changer 13 come from electrical insulation fluids 3 (be typically liquid, such as mineral oil or ester oil)
Except degranulation.It therefore, there is no need to pump to be used to make fluid circulation to pass through such as particulate filter, and be recycled back to also without any
Road.Alternatively, according to present disclosure, Natural Circulation produces stream in tap changer, the stream can be blocked by water adsorbent element 11
Cut and through water adsorbent element 11, water adsorbent element 11 can also arrested particles, it may for example comprise granule capturing (for example, absorption) material
Filter or labyrinth part.Natural Circulation represents to realize circulation in the case of no pumping.On the contrary, Natural Circulation by with gravity
The thermograde in the fluid of combination is acted on to cause.When fluid is for example by such as transition resistance of the electric member in tap changer
During the heat loss heating of device 28, the fluid that the density of fluid reduces and heated will rise, so as to also allow colder fluid to exist
Decline in tap changer.Then the fluid stream as caused by Natural Circulation can be intercepted by the water adsorbent element 11 according to present disclosure
And through water adsorbent element, and do not need extra pump and circulation loop.Present disclosure is referring especially to some embodiments upper
Described in text.However, as those skilled in the art will readily appreciate that, other realities in addition to more above-disclosed
Apply example by appended Patent right requirement limit scope of the present disclosure interior equally possible.
Claims (29)
1. one kind is configured to include the electrical equipment (1) of electrical insulation fluids (3), the electrical equipment is included by waterproof material (12)
The water adsorbent element (11) of protection, the waterproof material (12) prevents the water adsorbent element from being absorbed water from its surrounding environment, the waterproof
Material can be dissolved by the electrical insulation fluids.
2. electrical equipment according to claim 1, it is characterised in that the water adsorbent element (11) is soaked with the waterproof material
(12)。
3. electrical equipment according to claim 1, it is characterised in that the water adsorbent element (11) is enclosed in by the waterproof
In the packaging that material (12) is made.
4. electrical equipment according to claim 1, it is characterised in that the water adsorbent element (11) is enclosed in by the waterproof
In the film that material (12) is made.
5. electrical equipment according to claim 1, it is characterised in that the waterproof material (12) adheres to the water suction member
On the surface of part (11).
6. electrical equipment according to claim 1, it is characterised in that the water adsorbent element is enclosed in by means of the waterproof
In the waterproof cover that material is held in place.
7. the electrical equipment according to any one of claim 1-6, it is characterised in that guiding piece (29) is positioned at the electricity
In gas equipment (1), and it is arranged to stream (25, the 27) guiding of the electrical insulation fluids (3) to the water adsorbent element (11).
8. electrical equipment according to claim 7, it is characterised in that the guiding piece (29) is arranged to guide the electricity absolutely
Stream (25,27) caused by the Natural Circulation of edge fluid (3).
9. electrical equipment according to claim 7, it is characterised in that the guiding piece (29) is infundibulate.
10. electrical equipment according to claim 9, it is characterised in that the guiding piece (29) is arranged to collect and concentrated
The upward stream (25) of the electrical insulation fluids (3), the stream (25) and then cooled and formed to being positioned at the guiding piece
Outside water adsorbent element (11) downward stream (27).
11. electrical equipment according to claim 7, it is characterised in that the water adsorbent element (11) is attached to the guiding
On part (29).
12. the electrical equipment according to any one of claim 1-6, it is characterised in that water adsorbent element (11) construction
Particle into trapping the electrical insulation fluids (3) when being immersed in the electrical insulation fluids (3).
13. the electrical equipment according to any one of claim 1-6, it is characterised in that the waterproof material (12) is in institute
State and be completely dissolved under the usual operating conditions of electrical equipment (1) in one week by the electrical insulation fluids (3).
14. electrical equipment according to claim 13, it is characterised in that the waterproof material (12) is in the electrical equipment
(1) it was completely dissolved under usual operating conditions in 48 or 24 hours by the electrical insulation fluids (3).
15. the electrical equipment according to any one of claim 1-6, it is characterised in that the waterproof material (12) is in institute
State and do not corrode metal when being dissolved in the electrical insulation fluids (3) under the operating condition of electrical equipment (1).
16. the electrical equipment according to any one of claim 1-6, it is characterised in that the waterproof material (12) is wax
Or lipid.
17. the electrical equipment according to any one of claim 1-6, it is characterised in that the waterproof material (12) is conjunction
Into or natural polymer.
18. the electrical equipment according to any one of claim 1-6, it is characterised in that the waterproof material (12) is ore deposit
Thing oil or the material based on ester.
19. the electrical equipment according to any one of claim 1-6, it is characterised in that the waterproof material (12) is all
Intellectual circle.
20. the electrical equipment according to any one of claim 1-6, it is characterised in that the electrical equipment (1) be with
A part for the system of at least 1000 volts or at least 1500 volts of system voltage.
21. the electrical equipment according to any one of claim 1-6, it is characterised in that the electrical equipment (1) is electric power
Transformer or motor.
22. the electrical equipment according to claim any one of 1-6, it is characterised in that the electrical equipment (1) is for electricity
Power transformer has a load tap changer.
23. the electrical equipment according to any one of claim 1-6, it is characterised in that the electrical insulation fluids (3) are
Oil.
24. the electrical equipment according to any one of claim 1-6, it is characterised in that the electrical insulation fluids (3) include
Oil.
25. electrical equipment according to claim 23, it is characterised in that the oil is mineral oil or ester oil.
26. the electrical equipment according to any one of claim 1-6, it is characterised in that the water adsorbent element (11) includes
Hygroscopic polymeric material.
27. electrical equipment according to claim 26, it is characterised in that the hygroscopic polymeric material is based on fiber
Element, the absorbent material based on polyacrylamide or based on silica.
28. electrical equipment according to claim 26, it is characterised in that the hygroscopic polymeric material is cotton or clay.
29. a kind of electrical insulation fluids (3) from the tap changer (13) for power transformer (1) remove moisture and particle
Method, methods described includes：
A part for the electrical insulation fluids is heated using the heat of electric switch (23) generation in the tap changer, thus
The upward stream of the electrical insulation fluids is produced by the Natural Circulation of the electrical insulation fluids in the tap changer；
Upward stream is cooled down, thus the downward stream of the electrical insulation fluids passes through the electrical insulation fluids in the tap changer
Natural Circulation produce；And
Trapping is carried by upward stream and/or downward stream in water adsorbent element (11) in the tap changer at least one
A little particles, at least a portion of stream passes through the water adsorbent element due to Natural Circulation, so as to be removed from the electrical insulation fluids
The particle and moisture.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13164089.8 | 2013-04-17 | ||
| EP13164089 | 2013-04-17 | ||
| PCT/EP2014/057514 WO2014170263A1 (en) | 2013-04-17 | 2014-04-14 | Moisture absorber in electrical equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105612586A CN105612586A (en) | 2016-05-25 |
| CN105612586B true CN105612586B (en) | 2017-10-17 |
Family
ID=48095733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480034509.6A Active CN105612586B (en) | 2013-04-17 | 2014-04-14 | Dehydrating breather in electrical equipment |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2987171B1 (en) |
| CN (1) | CN105612586B (en) |
| WO (1) | WO2014170263A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170252721A1 (en) * | 2016-03-07 | 2017-09-07 | Virginia Transformer Corporation | Transformer oil moisture removing apparatus |
| AT521932A1 (en) * | 2018-12-12 | 2020-06-15 | Siemens Ag | Reduction of aging in the insulation material of a winding, in particular an oil-impregnated high-voltage device |
| CN110534307A (en) * | 2019-09-20 | 2019-12-03 | 江苏康宇电力设备有限公司 | A kind of transformer oil moisture removal device |
| DE102020104650A1 (en) | 2020-02-21 | 2021-08-26 | Audi Aktiengesellschaft | Energy storage device and motor vehicle with an energy storage device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0481239A1 (en) * | 1990-10-19 | 1992-04-22 | Maschinenfabrik Reinhausen Gmbh | Oil filter, especially for tap changes of step-down transformers |
| US5766464A (en) * | 1995-11-22 | 1998-06-16 | Campbell; David C. | Fluid filtration system positionable within a fluid-containing apparatus |
| JP2010258318A (en) * | 2009-04-28 | 2010-11-11 | Chugoku Electric Power Co Inc:The | Moisture absorption respiratory apparatus |
| CN202134324U (en) * | 2011-06-17 | 2012-02-01 | 平阴县供电公司 | Oil storage cabinet for on-load voltage regulating switch of transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007221047A (en) | 2006-02-20 | 2007-08-30 | Toshiba Corp | Transformer |
-
2014
- 2014-04-14 WO PCT/EP2014/057514 patent/WO2014170263A1/en active Application Filing
- 2014-04-14 CN CN201480034509.6A patent/CN105612586B/en active Active
- 2014-04-14 EP EP14717149.0A patent/EP2987171B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0481239A1 (en) * | 1990-10-19 | 1992-04-22 | Maschinenfabrik Reinhausen Gmbh | Oil filter, especially for tap changes of step-down transformers |
| US5766464A (en) * | 1995-11-22 | 1998-06-16 | Campbell; David C. | Fluid filtration system positionable within a fluid-containing apparatus |
| JP2010258318A (en) * | 2009-04-28 | 2010-11-11 | Chugoku Electric Power Co Inc:The | Moisture absorption respiratory apparatus |
| CN202134324U (en) * | 2011-06-17 | 2012-02-01 | 平阴县供电公司 | Oil storage cabinet for on-load voltage regulating switch of transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2987171A1 (en) | 2016-02-24 |
| EP2987171B1 (en) | 2017-01-11 |
| WO2014170263A1 (en) | 2014-10-23 |
| CN105612586A (en) | 2016-05-25 |
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