CN105352911A - Excitation surge current suppressor used on three-phase linkage breaker - Google Patents
Excitation surge current suppressor used on three-phase linkage breaker Download PDFInfo
- Publication number
- CN105352911A CN105352911A CN201510905344.1A CN201510905344A CN105352911A CN 105352911 A CN105352911 A CN 105352911A CN 201510905344 A CN201510905344 A CN 201510905344A CN 105352911 A CN105352911 A CN 105352911A
- Authority
- CN
- China
- Prior art keywords
- surge suppressor
- spectrometer unit
- main frame
- filtrator
- bottle
- 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.)
- Granted
Links
- 230000005284 excitation Effects 0.000 title abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 34
- 239000012535 impurity Substances 0.000 claims abstract description 19
- 230000008676 import Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005070 sampling Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002889 sympathetic effect Effects 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an excitation surge current suppressor used on a three-phase linkage breaker. The excitation surge current suppressor comprises a transformer body and a detector shell. A drawer base is arranged at the lateral portion of the transformer body, a drawer box is arranged in the drawer base, and an excitation surge current suppressor body is installed in the drawer box and connected with the breaker. An oil drum is arranged on the transformer body. A spectrograph body and an impurity filtering device are arranged in the detector shell. The impurity filtering device comprises a support, two size measuring instruments and a filter are installed on the support, and the two size measuring instruments are installed at the upper portion and the lower portion of the filter respectively and connected with the filter in series. A second communicating pipe is arranged between the impurity filtering device and the spectrograph body and provided with a delivering pump. A sampling device is arranged on the detector shell and connected with the oil drum and an inlet.
Description
Technical field
The present invention relates to and belongs to transformer oil checkout equipment field, is exactly a kind of exciting surge suppressor on three-phase ganged isolating switch.
Background technology
When transformer during no-load closing moment, due to the existence of transformer core Flux saturation, relict flux and the nonlinear characteristic of core material, the sizable excitation surge current of amplitude can be produced, through several weeks, the transient process of ripple reaches steady state (SS), and the switching current of this impact often can reach the 6-8 of rated current doubly.In addition, this excitation surge current will cause the fluctuation of this regional voltage again, causes, with the change of the transformer magnetizing current of its paired running, namely producing sympathetic inrush.Transformer differential protection misoperation may be caused thus, transformer insulated damage, winding deformation, reduce power system power supply quality simultaneously.Transformer oil is a kind of fraction products of oil, has the effects such as insulation, thermolysis, extinguishing arc in transformer application.Transformer oil after Long-Time Service needs periodic detection, avoids deterioration of oil product to cause effect to decline.At present, employing spectrometer is detected for transformer oil to carry out.There are insoluble greasy filth, fiber and foul etc. in the transformer oil of Long-Time Service, these materials may cause spectrometer to block, and cause fault together.
Summary of the invention
For solving the problem, the object of this invention is to provide a kind of exciting surge suppressor on three-phase ganged isolating switch.
The present invention for achieving the above object, is achieved through the following technical solutions:
A kind of exciting surge suppressor on three-phase ganged isolating switch, comprise transformer main frame and detector housing, the sidepiece of transformer main frame arranges drawout chassis, in drawout chassis, drawer box is set, in drawer box, exciting surge suppressor main frame is installed, exciting surge suppressor main frame connecting breaker, transformer main frame is provided with oil drum, spectrometer unit and device for filtering impurities are set in detector housing, device for filtering impurities comprises support, support installs two volume measuring instruments and filtrator, two volume measuring instruments are arranged on the upper and lower of filtrator respectively, volume measuring instrument and positioned inline, volume measuring instrument is made up of bottle, separation net, Infrared survey instrument and floater shot, bottle upper and lower arranges import and outlet respectively, and arrange vertical separation net in bottle, floater shot is positioned at bottle, bottle upper side installation infrared measuring instrument, Infrared survey instrument is positioned at floater shot side, filtrator is made up of filtration barrel body, several screen pack and upper cover, and filtration barrel body inwall arranges fixture block, and several screen pack is distributed up and down and coordinated by support bar each other, and support bar card is placed on fixture block, and upper cover coordinates with filtration barrel body, upper cover is connected by flexible pipe with the volume measuring instrument on filtrator top, arranged for the second communicating pipe between device for filtering impurities and spectrometer unit, the second communicating pipe was provided with discharge pump, and detector housing arranges sampler, and sampler connects oil drum and import.
For realizing object of the present invention further, can also by the following technical solutions: described sampler comprises electric push rod and sleeve, the piston rod of electricity push rod coordinates with sleeve, sleeve is by tubes connection oil drum, retaining valve installed by conduit, sleeve arranges arm, and arm connects import, and arm installs solenoid valve.Between described spectrometer unit and device for filtering impurities, de-watering apparatus is set, third connecting pipe is set between de-watering apparatus and spectrometer unit, second communicating pipe arranged T-valve, and T-valve connects one end of the first communicating pipe, and the other end of the first communicating pipe connects de-watering apparatus; De-watering apparatus comprises base, and base installs two weighers and vacuum drainage cylinder, and two weighers lay respectively at vacuum drainage cylinder two ends, and weigher is connected with vacuum drainage cylinder; Weigher is made up of weighing cup and electronic scale, and weighing cup is fixedly mounted on the top of electronic scale; Vacuum drainage cylinder comprises cylindrical shell, arranges heating rod in cylindrical shell, and the top of cylindrical shell arranges gas-liquid separator, and gas-liquid separator connects vacuum pump.Described spectrometer unit is arranged input keyboard, overturning seat and display screen, display screen is connected with spectrometer unit by overturning seat.Detector housing outside is exposed at outside the display screen of described spectrometer unit.
The invention has the advantages that: in the present invention, exciting surge suppressor main frame adopts drawer type to coordinate with transformer main frame, and convenient installation is convenient to maintenance and safeguards.By exciting surge suppressor main frame, the isolating switch malfunction avoiding excitation surge current to cause, uses accurate phase control technology, controls primary equipment with secondary device, fundamentally realizes effective suppression of excitation surge current.Transformer oil can carry out timing and detect, and avoids because the normal operation of oil quality variable effect transformer.The present invention can filter tested transformer oil before detection, by insoluble greasy filth, fiber and dirt filtration out, avoids spectrometer to block.After being filtered by device for filtering impurities, can calculate and obtain volume number shared by impurity, determine tested transformer oil reuses after whether can carrying out filtration treatment, thus determine the transformer oil that whether is necessary again to renew, avoid waste.Clear up after filtration conveniently.Transformer oil after filtration, after kaleidophon detects, can reduce the impact of solid matter, discharges physical factor, obtains experimental result and more press close to production and application.The present invention also has advantage compact, cheap for manufacturing cost and easy to use simple for structure.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention; Fig. 2 is the I partial enlargement structural representation of Fig. 1; Fig. 3 is the II partial enlargement structural representation of Fig. 1.
Reference numeral: 1 spectrometer unit 2 input keyboard 3 overturning seat 4 display screen 5 weighing cup 6 electronic scale 7 vacuum drainage cylinder 8 base 9 heating rod 10 weigher 11 T-valve 12 discharge pump 13 support 14 volume measuring instrument 15 filtrator 16 first communicating pipe 17 second communicating pipe 18 vacuum pump 19 gas-liquid separator 20 third connecting pipe 21 bottle 22 separation net 23 Infrared survey instrument 24 floater shot 25 import 26 exports 27 filtration barrel body 28 fixture block 29 screen pack 30 support bar 31 upper cover 32 detector housing 33 electric push rod 34 sleeve 35 solenoid valve 36 retaining valve 37 oil drum 38 transformer body 39 exciting surge suppressor main frame 40 drawout chassis 41 drawer box 42 isolating switch 43 conduit 44 arm.
Embodiment
A kind of exciting surge suppressor on three-phase ganged isolating switch, as Fig. 1, shown in Fig. 2 and Fig. 3, comprise transformer main frame 38 and detector housing 32, the sidepiece of transformer main frame 38 arranges drawout chassis 40, drawer box 41 is set in drawout chassis 40, in drawer box 41, exciting surge suppressor main frame 39 is installed, exciting surge suppressor main frame 39 connecting breaker 42, transformer main frame 38 is provided with oil drum 37, spectrometer unit 1 and device for filtering impurities are set in detector housing 32, device for filtering impurities comprises support 13, support 13 installs two volume measuring instruments 14 and filtrator 15, two volume measuring instruments 14 are arranged on the upper and lower of filtrator 15 respectively, volume measuring instrument 14 and filtrator 15 are connected, volume measuring instrument 14 is made up of bottle 21, separation net 22, Infrared survey instrument 23 and floater shot 24, bottle 21 upper and lower arranges import 25 and outlet 26 respectively, vertical separation net 22 is set in bottle 21, floater shot 24 is positioned at bottle 21, bottle 21 upper side installation infrared measuring instrument 23, Infrared survey instrument 23 is positioned at floater shot 24 side, filtrator 15 is made up of filtration barrel body 27, several screen pack 29 and upper cover 31, filtration barrel body 27 inwall arranges fixture block 28, several screen pack about 29 is distributed and is coordinated by support bar 30 each other, and support bar 30 card is placed on fixture block 28, and upper cover 31 coordinates with filtration barrel body 27, upper cover 31 is connected by flexible pipe with the volume measuring instrument 14 on filtrator 15 top, arrange between device for filtering impurities and spectrometer unit 1 and be provided with discharge pump 12 second communicating pipe 17 communicating pipe 17, second.Detector housing 32 arranges sampler, and sampler connects oil drum 37 and import 25.Described sampler comprises electric push rod 33 and sleeve 34, and the piston rod of electric push rod 33 coordinates with sleeve 34, and sleeve 34 connects oil drum 37 by conduit 43, conduit 43 is installed retaining valve 36, sleeve 34 is arranged arm 44, arm 44 connects import 25, arm 44 is installed solenoid valve 35.Shut electromagnetic valve 35, regains piston rod by electric push rod 33, makes to produce negative pressure in sleeve 34, transformer oil sucking-off is sampled, opens solenoid valve 35, the outside push piston bar of electric push rod, the transformer oil of sampling is pushed into detecting device detect, due to the effect of retaining valve, sample can not reflux.Said structure sampling is convenient, easy and simple to handle.
Use procedure of the present invention is: be added in the volume measuring instrument 14 on top by checked transformer oil sample, before adding, closes the valve of volume measuring instrument 14 upper outlet.Along with adding of transformer oil, floater shot 24 upwards floats, and avoids floater shot 24 to move left and right under the restriction of separation net 22, after adding stopping, being measured the position of floater shot 24 by Infrared survey instrument 23, thus determines the volume of the transformer oil added.Transformer oil in the volume measuring instrument 14 on top is entered after filtrator 15 filters the volume measuring instrument 14 of bottom.In like manner, the volume of the transformer oil after filtration can be measured, thus obtain the amount filtering out impurity.If the amount of filtered impurities is fewer, illustrate that this transformer oil reuses after can filtering.For filtrator 15, upper cover 31 can be opened during cleaning, screen pack 29 is taken out cleaning.
Owing to also there is a lot of moisture in transformer oil, moisture also can affect testing result, and detecting the water cut of the transformer oil of Long-Time Service is also an important indicator.In order to realize lab scale test, between described spectrometer unit 1 and device for filtering impurities, de-watering apparatus is set, third connecting pipe 20 is set between de-watering apparatus and spectrometer unit 1, second communicating pipe 17 arranged T-valve 11, T-valve 11 connects one end of the first communicating pipe 16, and the other end of the first communicating pipe 16 connects de-watering apparatus; De-watering apparatus comprises base 8, and on base 8, installation two weighers 10 and vacuum drainage cylinder 7, two weighers 10 lay respectively at vacuum drainage cylinder 7 two ends, and weigher 10 is connected with vacuum drainage cylinder; Weigher 10 is made up of weighing cup 5 and electronic scale 6, and weighing cup 5 is fixedly mounted on the top of electronic scale 6; Vacuum drainage cylinder 10 comprises cylindrical shell, arranges heating rod 9 in cylindrical shell, and the top of cylindrical shell arranges gas-liquid separator 19, and gas-liquid separator 19 connects vacuum pump 18.Transformer oil after filtration is added in weigher 10 and weighs, enter in vacuum drainage cylinder 7 after weighing, improving temperature by heating rod 9 is moisture evaporation, reduces pressure by vacuum pump 18, extruded by moisture in transformer oil, moisture is separated through gas-liquid separator 19.Transformer oil after draining weighs entering another weigher 10, thus determines the water cut in transformer oil.Can judge whether transformer oil can be recycled according to water cut.
Described spectrometer unit 1 is arranged input keyboard 2, overturning seat 3 and display screen 4, display screen 4 is connected with spectrometer unit 1 by overturning seat 3.Display screen 4 and input keyboard 2 are structure as a whole with spectrometer main frame 1, easy to use, and without the need to other connection device, when not using, display screen 4 turnover can be protected display screen 4, display screen 4 can cover on input keyboard 2, also can protect input keyboard 2.Detector housing 32 is exposed at outside, convenient observation and process outside the display screen 4 of described spectrometer unit 1.
Technical scheme of the present invention is not restricted in the scope of embodiment of the present invention.The technology contents of the not detailed description of the present invention is known technology.
Claims (5)
1. the exciting surge suppressor on three-phase ganged isolating switch, it is characterized in that: comprise transformer main frame (38) and detector housing (32), the sidepiece of transformer main frame (38) arranges drawout chassis (40), drawer box (41) is set in drawout chassis (40), in drawer box (41), exciting surge suppressor main frame (39) is installed, exciting surge suppressor main frame (39) connecting breaker (42), transformer main frame (38) is provided with oil drum (37), spectrometer unit (1) and device for filtering impurities are set in detector housing (32), device for filtering impurities comprises support (13), upper installation two volume measuring instruments (14) of support (13) and filtrator (15), two volume measuring instruments (14) are arranged on the upper and lower of filtrator (15) respectively, volume measuring instrument (14) and filtrator (15) series connection, volume measuring instrument (14) is made up of bottle (21), separation net (22), Infrared survey instrument (23) and floater shot (24), bottle (21) upper and lower arranges import (25) and outlet (26) respectively, vertical separation net (22) is set in bottle (21), floater shot (24) is positioned at bottle (21), bottle (21) upper side installation infrared measuring instrument (23), Infrared survey instrument (23) is positioned at floater shot (24) side, filtrator (15) is made up of filtration barrel body (27), several screen pack (29) and upper cover (31), filtration barrel body (27) inwall arranges fixture block (28), several screen pack (29) is distributed up and down and is coordinated by support bar (30) each other, support bar (30) card is placed on fixture block (28), and upper cover (31) coordinates with filtration barrel body (27), upper cover (31) is connected by flexible pipe with the volume measuring instrument (14) on filtrator (15) top, arrange the second communicating pipe (17) between device for filtering impurities and spectrometer unit (1), the second communicating pipe (17) is provided with discharge pump (12), (32) arrange sampler to detector housing, and sampler connects oil drum (37) and import (25).
2. a kind of exciting surge suppressor on three-phase ganged isolating switch according to claim 1, it is characterized in that: described sampler comprises electric push rod (33) and sleeve (34), the piston rod of electricity push rod (33) coordinates with sleeve (34), sleeve (34) connects oil drum (37) by conduit (43), conduit (43) is installed retaining valve (36), sleeve (34) is arranged arm (44), arm (44) connects import (25), arm (44) is installed solenoid valve (35).
3. a kind of exciting surge suppressor on three-phase ganged isolating switch according to claim 1, it is characterized in that: between described spectrometer unit (1) and device for filtering impurities, de-watering apparatus is set, third connecting pipe (20) is set between de-watering apparatus and spectrometer unit (1), arranged T-valve (11) second communicating pipe (17), T-valve (11) connects one end of the first communicating pipe (16), and the other end of the first communicating pipe (16) connects de-watering apparatus; De-watering apparatus comprises base (8), upper installation two weighers (10) of base (8) and vacuum drainage cylinder (7), and two weighers (10) lay respectively at vacuum drainage cylinder (7) two ends, and weigher (10) is connected with vacuum drainage cylinder; Weigher (10) is made up of weighing cup (5) and electronic scale (6), and weighing cup (5) is fixedly mounted on the top of electronic scale (6); Vacuum drainage cylinder (10) comprises cylindrical shell, arranges heating rod (9) in cylindrical shell, and the top of cylindrical shell arranges gas-liquid separator (19), and gas-liquid separator (19) connects vacuum pump (18).
4. a kind of exciting surge suppressor on three-phase ganged isolating switch according to claim 1, it is characterized in that: described spectrometer unit (1) is arranged input keyboard (2), overturning seat (3) and display screen (4), display screen (4) is connected with spectrometer unit (1) by overturning seat (3).
5. a kind of exciting surge suppressor on three-phase ganged isolating switch according to claim 4, is characterized in that: be exposed at detector housing (32) outside the display screen (4) of described spectrometer unit (1) outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510905344.1A CN105352911B (en) | 2015-12-10 | 2015-12-10 | A kind of exciting surge suppressor on three-phase ganged breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510905344.1A CN105352911B (en) | 2015-12-10 | 2015-12-10 | A kind of exciting surge suppressor on three-phase ganged breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105352911A true CN105352911A (en) | 2016-02-24 |
| CN105352911B CN105352911B (en) | 2017-11-24 |
Family
ID=55328917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510905344.1A Active CN105352911B (en) | 2015-12-10 | 2015-12-10 | A kind of exciting surge suppressor on three-phase ganged breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105352911B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281129B (en) * | 2005-09-15 | 2011-06-15 | 聚光科技(杭州)股份有限公司 | On-position type gas analysis system with on-position calibration function |
| WO2012032124A1 (en) * | 2010-09-08 | 2012-03-15 | Tecan Trading Ag | Microplate-reader with a controlled gas atmosphere, corresponding method and use of same |
| CN102495006A (en) * | 2011-11-22 | 2012-06-13 | 中国铝业股份有限公司 | Method for detecting non-anode effect CF4 |
| CN102585991A (en) * | 2011-12-22 | 2012-07-18 | 北京盈胜泰科技术有限公司 | Method and system for removing and supplying antioxidant from/to transformer insulating oil impurities |
| CN205246534U (en) * | 2015-12-10 | 2016-05-18 | 国家电网公司 | A excitation surge current inhibitor for on three -phase joined actuator |
-
2015
- 2015-12-10 CN CN201510905344.1A patent/CN105352911B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281129B (en) * | 2005-09-15 | 2011-06-15 | 聚光科技(杭州)股份有限公司 | On-position type gas analysis system with on-position calibration function |
| WO2012032124A1 (en) * | 2010-09-08 | 2012-03-15 | Tecan Trading Ag | Microplate-reader with a controlled gas atmosphere, corresponding method and use of same |
| CN102495006A (en) * | 2011-11-22 | 2012-06-13 | 中国铝业股份有限公司 | Method for detecting non-anode effect CF4 |
| CN102585991A (en) * | 2011-12-22 | 2012-07-18 | 北京盈胜泰科技术有限公司 | Method and system for removing and supplying antioxidant from/to transformer insulating oil impurities |
| CN205246534U (en) * | 2015-12-10 | 2016-05-18 | 国家电网公司 | A excitation surge current inhibitor for on three -phase joined actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105352911B (en) | 2017-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101706535B (en) | Device and method for testing dielectric loss of high voltage transformer | |
| CN104897985B (en) | A kind of capacitance partial pressure power taking passive voltage remote monitoring system | |
| CN110988636B (en) | Insulation detection method and device for capacitor voltage transformer | |
| CN102608485B (en) | Detection method for zero-sequence current loops of transformer substations | |
| CN109581155A (en) | Transformer insulation oil pressure resistant testing device | |
| CN105356374A (en) | Obstacle removing device of saw blade cutting type for unmanned plane | |
| CN205246534U (en) | A excitation surge current inhibitor for on three -phase joined actuator | |
| CN105337220A (en) | Unmanned aerial vehicle laser cutting barrier removing device | |
| CN110031677A (en) | Dry-type air-core reactor scene impedance measuring circuit and detection method | |
| CN105352911A (en) | Excitation surge current suppressor used on three-phase linkage breaker | |
| CN101477160B (en) | Floating model difference value high-voltage capacitor state monitoring method and apparatus thereof | |
| CN205209951U (en) | Error calibrating device of transformer oil gas analysis | |
| CN205139005U (en) | Transformer oil spectrum detection instrument | |
| CN206479609U (en) | A kind of miniaturization Large Copacity pressure-resistant apparatus tested for GIS | |
| CN206074752U (en) | A kind of industrial frequency AC Withstand test device | |
| CN205139000U (en) | Transformer oil gas multicomponent gas spectral analysis appearance | |
| CN208043943U (en) | A kind of capacitance current test device and system based on switch cabinet electrified instruction device | |
| CN105334180B (en) | A kind of transformer oil spectrum detection instrument | |
| CN105334168A (en) | Error calibration device for transformer oil gas analysis | |
| WO2021098325A1 (en) | Voltage acquisition and compensation circuit | |
| CN205786860U (en) | Anti-interference switch equipment dynamic loop resistance tester | |
| CN109239540A (en) | High-voltage arrester defect diagnostic method and voltage distribute measuring device | |
| CN105334169B (en) | A kind of transformer oil gas multicomponent gas spectroanalysis instrument | |
| CN107465199A (en) | A kind of extra-high-voltage alternating current engineering assembling shunt capacitor equipment | |
| CN205231625U (en) | Unmanned aerial vehicle laser removes barrier device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |