CN205723077U - The monitoring device that transformer breather blocks - Google Patents
The monitoring device that transformer breather blocks Download PDFInfo
- Publication number
- CN205723077U CN205723077U CN201620171569.9U CN201620171569U CN205723077U CN 205723077 U CN205723077 U CN 205723077U CN 201620171569 U CN201620171569 U CN 201620171569U CN 205723077 U CN205723077 U CN 205723077U
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- Prior art keywords
- circular arc
- connecting tube
- import
- blocks
- transformer
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 14
- 230000000241 respiratory effect Effects 0.000 claims abstract description 38
- 210000000056 organ Anatomy 0.000 claims abstract description 34
- 230000035945 sensitivity Effects 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000008676 import Effects 0.000 claims abstract description 19
- 239000000741 silica gel Substances 0.000 claims abstract description 19
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 19
- 230000004888 barrier function Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 31
- 239000003921 oil Substances 0.000 description 25
- 230000008859 change Effects 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 9
- 239000003570 air Substances 0.000 description 8
- 230000029058 respiratory gaseous exchange Effects 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000004992 fission Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 241000168254 Siro Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Housings And Mounting Of Transformers (AREA)
Abstract
This utility model relates to the monitoring device that a kind of transformer breather blocks.It is characterized in: include circular arc type connecting tube (1), the outlet of this circular arc type connecting tube (1) connects with the respiratory organ connecting tube of transformator and its import and the outlet of horizontal connection tube (2), the import of this horizontal connection tube (2) also with the outlet of moistureproof silica gel tank (7), the import of this protection against the tide silica gel tank (7) and atmosphere；Valve is wherein installed on horizontal connection tube (2), and is also equipped with high sensitivity gas density relay (3) in the import of circular arc type connecting tube (1).Test proves that, after using this utility model device, improve large-scale filling transformer respiratory organ and block the precision and accuracy judged, it is to avoid large-scale filling transformer forced outage, reduce the direct and consequential damage caused owing to respiratory organ blocks, also improve Operation of Electric Systems reliability.
Description
Technical field
This utility model relates to the monitoring device that a kind of transformer breather blocks.
Background technology
In power transmission and transformation system, transformator is the equipment most basic, most important realizing electric energy conversion,
Power supply reliability is had great impact.Transformator effect in power system realizes voltage
Change, through-put power.After electric pressure is promoted by booster transformer, it is possible to reduce line loss, carry
The economy of high power transmission, reaches the purpose of remote power transmission, and step-down transformer then can be high voltage etc.
Level becomes the use voltages at different levels required for user, meets the need for electricity of different user.At electric energy
In transmitting procedure, transformator is the topmost equipment in all power regulation station, and it is in operation once
Occur abnormal, it will affect the operation of whole system and the power supply to user, even can cause large area
Have a power failure.
Along with the development of national economy, the increase of power consumption, transformer voltage grade, capacity are continuous
Promoting, large-scale filling transformer is widely applied in power system.Due to large-scale filling transformer
The institute's on-load that is in operation the most all is changing, and the loss making transformator is become by the most therewith
Change, thus cause the change of temperature of oil in transformer；In addition the change of the every day of temperature round the clock and ring throughout the year
The change of border temperature all can cause the change of temperature of oil in transformer.Electric load change and ambient air temperature change
To directly affect the change of the transformer oil volume of filling transformer, and capsule in installation for transformer,
The breathing pipeline that connecting tube, respiratory organ collectively constitute, when transformer oil volume changes, passes through
Respiratory organ is exhausted and air-breathing.When transformer oil expanded by heating, the sky that exhalation capsule is unnecessary
Gas；When temperature of oil in transformer reduces and shrinks, suck extraneous air.
It can thus be appreciated that respiratory organ is then one of important composition parts of transformation, equipped with desiccant inside it,
Such as silica gel, calcium chloride etc..Respiratory organ is typically mounted at the height of overhead about 1m, in order to inspection
Look into and safeguard.Because conservator respiratory organ to be passed through generation aerofluxus and getter action, so exhausted in conservator
Edge oil passes through respiratory organ and atmosphere, and internal desiccant absorbs the moisture in air and impurity, works as suction
When entering extraneous air, the transformer oil filtering external air in respiratory organ lubricating cup, then silica gel will not have
Crossing the moisture absorption filtered off, just the transformer oil in transformator is not invaded by moisture content in extraneous air,
Making its water content all the time within standard, to keep the quality of oil, in making transformator, insulating oil keeps
Good electric property, prevents humid air to be directly entered in installation for transformer, makes transformer oil make moist,
Reduce or destroy the dielectric strength of transformator, so that winding.
Transformator is the meeting of the moisture absorption silica gel particle in respiratory organ variable color, respiratory organ in long-term running
In seal oil cup, oil level will reduce, additionally, silica gel particle can be fissioned due to environmental change, block
Respiratory organ breathing pipeline.In order to ensure that transformer safety is run reliably, need transformer breather
The interior moisture absorption and fission granule are replaced, and respiratory organ seal oil cup is carried out oiling.Therefore running
Respiratory organ must be safeguarded by journey meticulously, when silica gel particle variable color is more than 2/3 or when fissioning serious,
Need to carry out respiratory organ silica gel replacing, to ensure moisture in air and the filter capacity of impurity, breathe
Unobstructed, it is to avoid transformator makes moist or respiratory obstruction impact power supply, causes unnecessary economic loss.
If transformer breather blocks, transformator can not be breathed, and will result in the pressure mistake in fuel tank
Big reach certain degree when force value, be likely to result in pressure relief device explosion, rupture pressure disc ruptures,
Leakage of oil, water inlet or false pasta.After respiratory organ finds blocking, should check that respiratory organ connecting leg is the most smooth in time
Logical, with or without stucking phenomena, as sometimes processed；Checking bell glass, rubber cushion etc. is the most intact,
If the silica gel moisture absorption is saturated simultaneously, should give replacing.It is the most domestic that to there is no effective monitoring large-scale oil-filled
The apparatus and method that transformer breather blocks.
Utility model content
One of the purpose of this utility model is to provide the monitoring device that a kind of transformer breather blocks, energy
Enough monitor large-scale filling transformer respiratory organ congestion situations in real time and carry out reporting to the police according to setting value or
Person opens breathing bypass.
The monitoring device that a kind of transformer breather blocks, it is particular in that: include that circular arc type is even
Adapter, the outlet of this circular arc type connecting tube connects and its import and water with the respiratory organ connecting tube of transformator
The outlet of flat connecting tube, the import of this horizontal connection tube also with the outlet of moistureproof silica gel tank,
The import of this protection against the tide silica gel tank and atmosphere；Valve is wherein installed on horizontal connection tube, and
The import of circular arc type connecting tube is also equipped with high sensitivity gas density relay.
Liquefaction oil steam acquisition cup is wherein installed in circular arc type connecting tube.
Wherein the mid portion of circular arc type connecting tube bends to circle and intersects.
Wherein high sensitivity gas density relay is by threaded flange barrier film and circular arc type connecting tube
Import connect, be filled with between this threaded flange barrier film and high sensitivity gas density relay
Sealing fluid.
Wherein valve uses electrically operated valve, the electric contact series connection of described high sensitivity gas density relay
In the control circuit of this electrically operated valve, it is thus possible to open electricity when the pressure detected exceedes preset value
Movable valve.
Wherein the electric contact of high sensitivity gas density relay is connected in warning circuit, it is thus possible to
The pressure detected exceedes preset value alarm.
Wherein circular arc adapter and horizontal connection tube diameter all with the connecting tube diameter of transformer breather
Identical.
Having the beneficial effects that of this utility model device: by connecting at large-scale filling transformer respiratory organ
On pipe and connect high sensitivity gas density relay monitor in real time large-scale filling transformer respiratory organ resistance
Plug situation, uses device described in the utility model, it is possible to realizes segmentation instruction and telecommunication, open
Dynamic bypath valve, in respiratory organ, pressure can reflect by digitized intuitively, it is possible to monitors that respiratory organ is normal
Force value during respiratory work state, when reaching pressure alarm threshold values, can be long-range by electric contact
Transmission, to operation maintenance personnel or dispatching and monitoring backstage, reminds operation maintenance personnel to check to scene；Same hour hands
Situation about cannot reach the spot unattended operation transformer station operation maintenance personnel in time, device passes through pressure-operated
Definite value, starts electrically operated valve, within the time period that operation maintenance personnel cannot be reached the spot in time, for transformation
The safe operation of device provides safeguard.
Test proves that, after using this utility model device, it is achieved that large-scale filling transformer is exhaled
Suction pipe road respiratory organ, connecting tube, the monitoring of conservator encapsulated state, effectively prevent large-scale oil-filled
Transformator because of respiratory organ silica gel fission, the valve of respiratory organ connecting tube closes by mistake, respiratory organ and connecting tube
Between the factor such as rubber cushion displacement block large-scale filling transformer breathing pipeline, contribute to finding in time and
Prevent design and the O&M defect of large-scale filling transformer, it is to avoid because operation maintenance personnel is because closing valve by mistake,
Lack the factor impacts such as O&M experience and the situations such as error in judgement occur, improve large-scale filling transformer and exhale
Haustorium block judge precision and accuracy, it is to avoid large-scale filling transformer forced outage, reduce due to
The direct and consequential damage that respiratory organ blocks and causes, also improves Operation of Electric Systems reliability.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model；
Accompanying drawing 2 is circuit theory diagrams of the present utility model；
Accompanying drawing 3 is circuit theory diagrams of the present utility model；
Accompanying drawing 4 is workflow diagram of the present utility model.
Detailed description of the invention
As it is shown in figure 1, this utility model provides the monitoring device that a kind of transformer breather blocks,
Whole device body may be mounted on support frame structure 9, and device body includes circular arc type connecting tube 1,
The outlet of this circular arc type connecting tube 1 is connected and its import with the respiratory organ connecting tube of transformator by flange
By the outlet of flange Yu horizontal connection tube 2, the import of this horizontal connection tube 2 also with moistureproof silicon
The outlet of glue tank 7, the import of this protection against the tide silica gel tank 7 and atmosphere；Wherein at level connection joint
Valve is installed on pipe 2, and it is close to be also equipped with high sensitivity gas in the import of circular arc type connecting tube 1
Degree relay 3.Specifically valve uses electrically operated valve 6, described high sensitivity gas density relay 3
Electric contact (microswitch outfan) be connected in the control circuit of this electrically operated valve 6, it is thus possible to
Connect when the pressure detected exceedes preset value to open electrically operated valve 6.Or wherein high sensitivity
The electric contact (microswitch outfan) of gas density relay 3 is connected in warning circuit, thus
Preset value alarm can be exceeded also, by wired or wireless mode by alarm signal at the pressure detected
It is sent to local transformer station and/or remote console.Can certainly be that two different pressure of setting are pre-
If value, exceed preset value alarm when exceeding first order pressure, open electronic when exceeding second level pressure
Valve 6 thus open breathing bypass, within the time period that operation maintenance personnel cannot be reached the spot in time, for
The safe operation of transformator provides safeguard.
Liquefaction oil steam acquisition cup 5 is wherein installed in circular arc type connecting tube 1.Wherein circular arc type is even
The mid portion of adapter 1 bends to circle and intersects.Wherein high sensitivity gas density relay
Device 3 is connected with the import of circular arc type connecting tube 1, in this screw-type method by threaded flange barrier film 4
It is filled with sealing fluid between blue barrier film 4 and high sensitivity gas density relay 3.Additionally circular arc connects
Pipe and horizontal connection tube 2 diameter are all interior with the connecting tube (three is round tube) of transformer breather
The diameter of wall is identical.
Embodiment 1:
Below in conjunction with the accompanying drawings, detailed description of the invention of the present utility model is carried out the most detailed elaboration.
As shown in Figure 1: this utility model device includes circular arc type connecting tube 1, horizontal connection tube 2,
High sensitivity gas density relay 3 (such as Germany's prestige card WIKA electric contact high sensitivity gas pressure
Force density relay APGT43.100), threaded flange barrier film 4, liquefaction oil steam acquisition cup 5,
Electrically operated valve 6, moistureproof silica gel tank 7, control cable 8, support frame structure 9.
Described circular arc adapter, horizontal connection tube 2, both diameters all with transformer breather connecting tube
Diameter is identical, and wherein circular arc adapter is the most closely connected by flange with transformer breather connecting tube
Connecing, horizontal connection tube 2 and circular arc connecting tube are by the parallel compact siro spinning technology of flange, circular arc connecting tube
While ensureing the smooth and easy breathing of gas, it is possible to prevent the oil vapour of liquefaction from blocking high sensitivity density and continue
Electrical equipment airway.
Described liquefaction oil steam acquisition cup 5 the most closely connects with the bottom of circular arc connecting tube physical direction
Connect, it is simple to collect the oil vapour of liquefaction.
Described high sensitivity density gases relay and threaded flange barrier film 4 form one and close system
System, inside fills sealing fluid, uses indirect measurement structure, it is adaptable to measure viscosity crystallization big, easy, corrosion
Property big, liquid, gas or the pressure of solid floating material medium that temperature is higher, and some is measured
Medium cannot directly enter universal instrument and is easy to clean the pressure of the occasion preventing deposit from gathering
Power detects.When the pressure of measured medium acts on barrier film, then barrier film is deformed, and system is closed in compression
Sealing fluid in system, due to the intrinsic property of sealing fluid, makes the flexible member in gas density relay
Produce the displacement of corresponding elastic deformation one, through instruction device display force value, due to the rigidity foot of barrier film
Enough little, the pressure of gas density relay instruction is near to the force value of measured medium.This system can
The deposit accumulation gas production joint effectively preventing oil gas from liquefying causes gas relay to block.
The closed system of described high sensitivity density gases relay and threaded flange barrier film 4 composition with
Circular arc connecting tube is connected, and with electric contact, can set two sections of gas pressure definite values, when gas pressure
When power reaches first paragraph definite value, can provide to transformer station's (current conversion station), monitoring backstage, centralized control center
Alarm signal, reminds operation maintenance personnel to site inspection；When gas pressure reaches second segment definite value, can
To start electrically operated valve 6 by control cable 8, temporarily free up the pressure of obstruction, become at unmanned
Power station operation maintenance personnel cannot reach on-the-spot time period interior protection transformer safety in time and run.
Described electrically operated valve 6 is joined directly together with moistureproof silica gel tank 7, and electrically operated valve 6 can be by controlling electricity
Cable 8 automatically turns on, closes, circular arc connecting tube and horizontal connection tube 2 composition when valve opening
Breathing bypass to start to breathe, moisture in air and impurity are carried out in respiratory by moistureproof silica gel tank 7
Filter.
Support frame as described above structure 9 is mainly used in support level connecting tube 2, thus realizes device overall
Being supported, anti-locking apparatus is overall because of gravity traction generation deformation.
It is circuit theory schematic diagram of the present utility model as shown in Figure 2,3, when high sensitivity gas is close
When degree relay 3 gas pressure reaches first paragraph warning value, the first relay MJ1 excitation, first continues
Electrical equipment MJ1 contact, sends out first paragraph alarm signal to monitoring backstage；When high sensitivity gas density
When relay 3 gas pressure reaches second segment warning value, the second relay MJ2 excitation, the second relay
Device MJ2 contact, sends out second segment alarm signal, simultaneously the 3rd relay BLJ to monitoring backstage
Excitation, the 3rd relay BLJ contact, open electrically operated valve 6, open breathing bypass and exhale
Inhale.
It is illustrated in figure 4 the flow chart of this utility model monitoring method, when large-scale filling transformer runs
Time normal, breathe path and breathe unimpeded, the respiratory pressure value of device Real-time Collection respiratory organ；When large-scale
Filling transformer respiratory organ pipeline closes, between respiratory organ and connecting tube due to silica gel fission, valve by mistake
The factor such as rubber cushion displacement when blocking, the force value of gas density relay monitoring will increase, work as pressure
When value increases to the 1st section of alarming value, contact sends out alarm signal to monitoring backstage, reminds O&M people
Member checks to scene；Unattended operation transformer station, such as operation maintenance personnel cannot be arrived the very first time
Scene, if now force value continues to increase, when force value reaches the 2nd section of alarming value, contact
Start electrically operated valve 6, open bypass and breathe, ensure that transformer safety is run.
Claims (7)
1. the monitoring device that a transformer breather blocks, it is characterised in that: include that circular arc type is even
Adapter (1), the outlet of this circular arc type connecting tube (1) connect with the respiratory organ connecting tube of transformator and
Its import and the outlet of horizontal connection tube (2), the import of this horizontal connection tube (2) is also with anti-
The outlet of tide silica gel tank (7), the import of this protection against the tide silica gel tank (7) and atmosphere；Wherein
Horizontal connection tube (2) is provided with valve, and also installs in the import of circular arc type connecting tube (1)
There is high sensitivity gas density relay (3).
2. the monitoring device that transformer breather as claimed in claim 1 blocks, it is characterised in that:
Liquefaction oil steam acquisition cup (5) is wherein installed in circular arc type connecting tube (1).
3. the monitoring device that transformer breather as claimed in claim 1 blocks, it is characterised in that:
Wherein the mid portion of circular arc type connecting tube (1) bends to circle and intersects.
4. the monitoring device that transformer breather as claimed in claim 1 blocks, it is characterised in that:
Wherein high sensitivity gas density relay (3) is by threaded flange barrier film (4) with circular arc type even
The import of adapter (1) connects, and continues with high sensitivity gas density at this threaded flange barrier film (4)
Electrical equipment is filled with sealing fluid between (3).
5. the monitoring device that transformer breather as claimed in claim 1 blocks, it is characterised in that:
Wherein valve uses electrically operated valve (6), and the electricity of described high sensitivity gas density relay (3) connects
Point is connected in the control circuit of this electrically operated valve (6), it is thus possible to exceed pre-at the pressure detected
If opening electrically operated valve (6) during value.
6. the monitoring device that transformer breather as claimed in claim 1 blocks, it is characterised in that:
Wherein the electric contact of high sensitivity gas density relay (3) is connected in warning circuit, it is thus possible to
Preset value alarm is exceeded at the pressure detected.
7. the monitoring device that transformer breather as claimed in claim 1 blocks, it is characterised in that:
Wherein circular arc adapter and horizontal connection tube (2) diameter all with the connecting tube diameter of transformer breather
Identical.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016201534710 | 2016-02-29 | ||
| CN201620153471 | 2016-02-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205723077U true CN205723077U (en) | 2016-11-23 |
Family
ID=57334328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620171569.9U Active CN205723077U (en) | 2016-02-29 | 2016-03-07 | The monitoring device that transformer breather blocks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205723077U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105632710A (en) * | 2016-02-29 | 2016-06-01 | 国家电网公司 | Blocking monitoring device of transformer breather |
| CN108493047A (en) * | 2018-04-09 | 2018-09-04 | 国网安徽省电力有限公司检修分公司 | A kind of sulfur hexafluoride gas density relay teletransmission communication system |
| CN110864927A (en) * | 2019-12-05 | 2020-03-06 | 广东电网有限责任公司 | Pneumatic characteristic testing platform and method for transformer breathing system |
| CN111001274A (en) * | 2019-12-23 | 2020-04-14 | 陕西金源自动化科技有限公司 | Front-mounted multifunctional respiratory state indicating device |
-
2016
- 2016-03-07 CN CN201620171569.9U patent/CN205723077U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105632710A (en) * | 2016-02-29 | 2016-06-01 | 国家电网公司 | Blocking monitoring device of transformer breather |
| CN108493047A (en) * | 2018-04-09 | 2018-09-04 | 国网安徽省电力有限公司检修分公司 | A kind of sulfur hexafluoride gas density relay teletransmission communication system |
| CN108493047B (en) * | 2018-04-09 | 2024-05-28 | 国网安徽省电力有限公司超高压分公司 | Sulfur hexafluoride gas density relay remote transmission communication system |
| CN110864927A (en) * | 2019-12-05 | 2020-03-06 | 广东电网有限责任公司 | Pneumatic characteristic testing platform and method for transformer breathing system |
| CN111001274A (en) * | 2019-12-23 | 2020-04-14 | 陕西金源自动化科技有限公司 | Front-mounted multifunctional respiratory state indicating device |
| CN111001274B (en) * | 2019-12-23 | 2021-11-05 | 陕西金源自动化科技有限公司 | Front-mounted multifunctional respiratory state indicating device |
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