CN108548995A - It is a kind of to rise act formula large capacity series resonance pressure test apparatus certainly - Google Patents
It is a kind of to rise act formula large capacity series resonance pressure test apparatus certainly Download PDFInfo
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- CN108548995A CN108548995A CN201810262560.2A CN201810262560A CN108548995A CN 108548995 A CN108548995 A CN 108548995A CN 201810262560 A CN201810262560 A CN 201810262560A CN 108548995 A CN108548995 A CN 108548995A
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- 238000012360 testing method Methods 0.000 title claims abstract description 67
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 230000008901 benefit Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 3
- 230000000873 masking effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 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
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention provides a kind of from liter act formula large capacity series resonance pressure test apparatus, including hydraulic platform, reactor/divider unit, variable-frequency power sources unit, excitation-transformation variable unit, measurement/control unit, compensation reactor unit；Reactor/the divider unit is connected with the excitation-transformation variable unit, the excitation-transformation variable unit is connected with the variable-frequency power sources unit, the control line of the measurement/control unit is connected with the variable-frequency power sources unit, measures line is connected with the reactor/divider unit, and the compensation reactor unit and reactor/divider unit are in parallel；Reactor/the divider includes reactor and divider, the two is concentric monolithic construction, i.e. reactor is hollow-core construction, and the divider is built in the center of the reactor cavity, when transport, the reactor/divider unit is fixed in horizontal type on hydraulic platform.
Description
Technical field
The present invention provides a kind of liter act formula large capacity series resonance pressure test apparatus certainly, belongs to high-voltage test techniques neck
Domain.
Background technology
Gas-insulating and fully-enclosed combined electrical apparatus (gas-insulated metal-enclosed switchgear, GIS) sets
It is standby due to compact-sized, safe, it is increasingly extensive in the application of power grid, especially from 1000 kilovolts of " southeast Shanxis-south in 2009
After the putting into operation of sun-Jingmen " UHVAC demonstration project first stage of the project, extra-high voltage GIS is used in the dress of China's electric system
Measure also steady-state growth.
Meanwhile gas-insulated metal closed power transmission line (gas-insulated metal enclosed
Transmission line, GIL) because its transmission line capability is big, take up an area less, flexible arrangement, reliability are high, maintenance is small, the service life
Long, environment influences the remarkable advantages such as small, is widely applied in fields such as power station, awful weather area, urban distribution networks, especially
It is putting into operation with " extra-high voltage GIL pipe galleries engineering is led in Soviet Union " in 2016, extra-high voltage GIL also starts gradually to promote.
The equipment such as extra-high voltage GIS, GIL voltage class is high, ground capacitance is big (for reviving and lead to 1100kV GIL equipment,
Single hop is 3km long, and corresponding capacitance is up to 150nF), high voltage side current is up to 40A to 100A, the ongoing spy in China when experiment
High pressure GIS field tests capacitance is no more than 20nF mostly, and series resonance test electric current works out generally within 10A
It can bear high current, the high voltage reactor that heat dissipation performance is met the requirements is current one of Research Challenges.Meanwhile in order to be promoted
The efficiency of extra-high voltage GIL engineering site commissioning tests reduces rig for testing floor space, and there is an urgent need in alternating-current voltage resistance test device knot
Structure optimization design, vehicle-mountedization extra-high voltage GIL pressure-resistant apparatus developments etc. carry out further investigation, realize the efficient of field test
Rate, high reliability.
Invention content
The present invention provides a kind of from liter act formula large capacity to solve drawbacks described above and deficiency existing in the prior art
Series resonance pressure test apparatus.
In order to solve the above technical problems, the present invention provides a kind of liter act formula large capacity series resonance pressure test apparatus certainly,
Including hydraulic platform, reactor/divider unit, variable-frequency power sources unit, excitation-transformation variable unit, measurement/control unit, compensating reactance
Device unit；Reactor/the divider unit is connected with the excitation-transformation variable unit, the excitation-transformation variable unit and the variable-frequency power sources
Unit is connected, and the control line of the measurement/control unit is connected with the variable-frequency power sources unit, measure line and the reactor/
Divider unit is connected, and the compensation reactor unit and reactor/divider unit are in parallel；The reactor/divider packet
Reactor and divider are included, the two is concentric monolithic construction, i.e., reactor is hollow-core construction, and the divider is built in described
The center of reactor cavity, when transport, the reactor/divider unit is fixed in horizontal type on hydraulic platform.
Further, the hydraulic platform includes platform base, hydraulic pressure lifting device, fixed support plate and slidingtype support
Plate；The end of the platform base and the fixed support plate is hinged, and the hydraulic pressure lifting device is arranged at the platform bottom
Between seat and the fixed support plate, the slidingtype support plate is slidably mounted in the fixed support plate.
Further, the platform base upper surface is equipped with the groove for accommodating the hydraulic pressure lifting device, and the hydraulic pressure, which rises, to be lifted
It is respectively hinged at the top of the bottom of the hydraulic cylinder of device and piston rod in the groove and in fixed support plate.
Further, opposite sliding, institute are realized by gear assembly between the slidingtype support plate and fixed support plate
Gear assembly is stated to be connected to the motor.
Further, the slidingtype support plate is equipped with telescopic anchor ear, is used for constant reactance device/divider unit.
Further, when the hydraulic platform liter act reactor/divider unit is vertical state, reactor/divider
Bottom is fallen into support base.
Further, the top of the reactor/divider unit is equipped with auto-expanding type grading shield.
Further, the grading shield ground is rubber material, and surface of bottom material is pasted with conductive masking foil or interconnection
Sheet metal, the grading shield are equipped with the inflating port to match with compressor air outlet adapter.
Further, the compensation reactor unit is formed in parallel by several reactor groups, and each reactor group high-pressure side is logical
After crossing halo-free conducting wire connection, with reactor/divider unit short circuit, each reactor group low-pressure end is grounded；When experiment, according to examination
The requirement of product ground capacitance and expected experiment resonant frequency, calculates required compensation reactor inductance value, calculation formula is as follows：
Then the current limit of compensation reactor is calculated by formula (3), the current limit of compensation reactor is less than compensation electricity
The sum of each reactor group load current value in anti-device unit, formula (3) are as follows：
In above-mentioned calculating formula, LxInductance value, I for required compensation reactorxFor compensation reactor by electric current limit
Value, f are resonant frequency, and L is test loop total inductance amount, LoIt is experiment for test loop inductance value, the C in addition to compensation reactor
Circuit total capacitance, UfIt is test loop total current value, I for pressure test voltage effective value, IorFor reactor/divider unit
Load current value.
The advantageous effects that the present invention is reached：
(1) of the invention includes main body rig for testing part and benefit from act formula large capacity series resonance pressure test apparatus is risen
Reactor section is repaid, wherein main body test portion can independently carry out the ac voltage withstanding experiment of smaller ground capacitance test product.Main body
The core unit of test portion --- reactor/divider unit, it is seperated compared to traditional using concentric overall fusion formula structure
Formula reactor, divider, without Assembling, line, floor space can also reduce 50%.
(2) the core list from the main body test portion for rising act formula large capacity series resonance pressure test apparatus of the invention
Position --- reactor/divider unit, integral arrangement in hydraulic platform, can by the hydraulic pressure lifting device of hydraulic platform, stretch
The components such as contracting formula anchor ear are automatically changeb to vertical trystate by horizontal travel position, and scene prepares without assembling, rig for testing
Workload is greatly decreased, it is contemplated that can be reduced to 1~2 hour by 4~6 hours, test efficiency is obviously improved.
(2) the core list from the main body test portion for rising act formula large capacity series resonance pressure test apparatus of the invention
Position --- reactor/divider unit, using inflatable grading shield, when experiment can automatic inflating expansion, it is extra-high compared to tradition
Rig for testing grading shield (being generally made of upper and lower grading ring, every grade of grading ring 2 semi-rings by being made of) is pressed, grading shield is in place
Time was reduced to 15 minutes by traditional 2~4 hours, and test efficiency is further promoted.
(3) of the invention from act formula large capacity series resonance pressure test apparatus is risen, wherein compensation reactor part can be by
The reactor of conventional serial Resonance Voltage Withstand Test device forms, and when field application can freely configure according to test product capacitance, flexibly
Property it is high, device durability is good.
(4) liter act formula large capacity series resonance pressure test apparatus certainly of the invention, can both be rapidly completed small electric
Capacity test product ac voltage withstanding is tested, and can be realized and be multiplexed with the variable-frequency power sources of conventional serial Resonance Voltage Withstand Test device, reactor,
It realizes the experiment of the equipment ac voltage withstandings such as extra-high voltage, large capacity GIS busbares/GIL, device acquisition cost can be reduced to greatest extent.
Description of the drawings
Fig. 1 schematic structural views of the invention；
The hydraulic platform structural schematic diagram of Fig. 2 present invention.
Wherein：1 reactor/divider unit；2 variable-frequency power sources units；3 excitation-transformation variable units；4 measurements/control unit；5 mend
Repay reactor unit；6 hydraulic platforms；7 support bases；1-1 reactors；1-2 divider；1-3 grading shields；6-1 platform bases；6-
2 hydraulic pressure lifting devices；The fixed support plates of 6-3；6-4 slidingtype support plates；6-5 anchor ears.
Specific implementation mode
With reference to specific embodiment, the invention will be further described.Following embodiment is only used for clearly illustrating
Technical scheme of the present invention, and not intended to limit the protection scope of the present invention.
Patent of the present invention is further illustrated with reference to the accompanying drawings and examples.
Since extra-high voltage GIS/GIL equipment ground capacitances are big, test voltage is high, electric current is big.When traditional mode is tested, need
Assembled temporarily by components such as each discrete reactor, capacitive dividers, rig for testing installation workload is big, field test effect
Rate is low.As shown in Figure 1, rising act formula large capacity series resonance pressure test apparatus certainly an embodiment of the present invention provides a kind of, by
Main body test portion and compensation reactor part composition, the wherein core cell of main body test portion --- reactor/divider
Unit, using concentric overall fusion formula structure, and integral arrangement can be automatically changeb on hydraulic platform by horizontal travel position
Vertical trystate, to make the rig for testing set-up time substantially reduce, field test efficiency is substantially improved.And compensation reactor
Unit after being computed, can be carried according to subject GIS/GIL equipment ground capacitances by the reactor of conventional serial resonance pressure-resistant device
For to while utmostly realizing equipment utilization rate, take into account vast capacity GIS busbares/GIL Field AC Withstand Voltage Tests
It needs.Specifically：
As shown in Figure 1, the present invention provides a kind of liter act formula large capacity series resonance pressure test apparatus, including hydraulic flat certainly
Platform 6, reactor/divider unit 1, variable-frequency power sources unit 2, excitation-transformation variable unit 3, measurement/control unit 4, compensation reactor list
Member 5；Reactor/the divider unit 1 is connected with the excitation-transformation variable unit 3, the excitation-transformation variable unit 3 and the variable-frequency power sources
Unit 2 is connected, and the control line of the measurement/control unit 4 is connected with the variable-frequency power sources unit 2, measures line and the reactance
Device/divider unit 1 is connected, and the compensation reactor unit 5 and reactor/divider unit 1 are in parallel；The reactor/point
Depressor unit 1 includes reactor 1-1 and divider 1-2, and the two is concentric monolithic construction, i.e. reactor 1-1 is hollow-core construction,
The divider 1-2 is built in the center of the reactor 1-1 cavitys, when transport, the reactor/divider unit 1
It is fixed on hydraulic platform 6 in horizontal type.
As shown in Fig. 2, the hydraulic platform 6 includes platform base 6-1, hydraulic pressure lifting device 6-2, fixed support plate 6-
3 and slidingtype support plate 6-4；The end of the platform base 6-1 and the fixed support plate 6-3 are hinged, the hydraulic pressure liter
It lifts device 6-2 to be arranged between the platform base 6-1 and the fixed support plate 6-3, the slidingtype support plate 6-4 is slided
It is dynamic to be mounted in the fixed 6-3 support plates.The upper surfaces the platform base 6-1, which are equipped with, accommodates the hydraulic pressure lifting device 6-
2 groove, be respectively hinged at the top of the bottom of the hydraulic cylinder of the hydraulic pressure lifting device 6-2 and piston rod in the groove and
On fixed support plate 6-3.Phase is realized by gear assembly between the slidingtype support plate 6-4 and fixed support plate 6-3
To sliding, the gear assembly is connected to the motor.The slidingtype support plate 6-4 is equipped with telescopic anchor ear 6-5, for fixing
Reactor/divider unit 1.Before real-time liter lifts operation, support base 7 is placed at hydraulic platform 6 first, rises act process knot
Shu Hou adjusts the position of support base 7 according to the position of 1 vertical state of reactor/divider unit so that and reactor/point
Depressor unit 1 is placed in right over support base, and then controlling slidingtype support plate 6-4 by motor slowly declines, and waits for slidingtype
Support plate 6-4 is back on fixed support plate 6-3, and the 6-2 contractions of hydraulic pressure lifting device make fixed support plate 6-3 be placed in platform
On pedestal 6-1, at this point, hydraulic pressure lifting device 6-2 is placed in groove.
The top of the reactor/divider unit 1 is equipped with auto-expanding type grading shield 1-3.The grading shield 1-3 grounds are rubber
Glue material matter, surface of bottom material are pasted with conductive masking foil or the sheet metal of interconnection, and the grading shield is equipped with to go out with compressor
The inflating port that gas connector matches.
The compensation reactor unit 5 is formed in parallel by several reactor groups, and each reactor group high-pressure side passes through halo-free
After conducting wire connection, with reactor/divider unit short circuit, each reactor group low-pressure end is grounded；When experiment, over the ground according to test product
The requirement of capacitance and expected experiment resonant frequency, calculates required compensation reactor inductance value, calculation formula is as follows：
Then the current limit of compensation reactor is calculated by formula (3), the current limit of compensation reactor should be less than compensating
The sum of each reactor group load current value in reactor unit, formula (3) are as follows：
In above-mentioned calculating formula, LxInductance value, I for required compensation reactorxFor compensation reactor by electric current limit
Value, f are resonant frequency, and L is test loop total inductance amount, LoIt is experiment for test loop inductance value, the C in addition to compensation reactor
Circuit total capacitance, UfIt is test loop total current value, I for pressure test voltage effective value, IorFor reactor/divider unit
Load current value.
The present invention is disclosed with preferred embodiment above, so it is not intended to limiting the invention, all to take equivalent replacement
Or the technical solution that the scheme of equivalent transformation is obtained, it all falls in protection scope of the present invention.
Claims (9)
1. a kind of from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：Including hydraulic platform, reactor/
Divider unit, variable-frequency power sources unit, excitation-transformation variable unit, measurement/control unit, compensation reactor unit；The reactor/point
Depressor unit is connected with the excitation-transformation variable unit, and the excitation-transformation variable unit is connected with the variable-frequency power sources unit, the measurement/control
The control line of unit processed is connected with the variable-frequency power sources unit, measures line is connected with the reactor/divider unit, the benefit
It repays reactor unit and reactor/divider unit is in parallel；Reactor/the divider includes reactor and divider, the two
For concentric monolithic construction, i.e. reactor is hollow-core construction, and the divider is built in the center of the reactor cavity,
When transport, the reactor/divider unit is fixed in horizontal type on hydraulic platform.
2. according to claim 1 from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：The liquid
Flattening bench includes platform base, hydraulic pressure lifting device, fixed support plate and slidingtype support plate；The platform base and described
The end of fixed support plate is hinged, the hydraulic pressure lifting device setting the platform base and the fixed support plate it
Between, the slidingtype support plate is slidably mounted in the fixed support plate.
3. according to claim 2 from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：It is described flat
Platform base upper surface is equipped with the groove for accommodating the hydraulic pressure lifting device, the bottom of the hydraulic cylinder of the hydraulic pressure lifting device and work
It is respectively hinged at the top of stopper rod in the groove and in fixed support plate.
4. according to claim 2 from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：The cunning
Realize that opposite sliding, the gear assembly are connected to the motor by gear assembly between dynamic formula support plate and fixed support plate.
5. according to claim 2 from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：The cunning
Dynamic formula support plate is equipped with telescopic anchor ear, is used for constant reactance device/divider unit.
6. according to claim 2 from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：The liquid
When flattening bench liter act reactor/divider unit is vertical state, the bottom of reactor/divider is fallen into support base.
7. according to claim 1 from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：The electricity
The top of anti-device/divider unit is equipped with auto-expanding type grading shield.
8. according to claim 7 from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：It is described equal
Pressure cover ground is rubber material, and surface of bottom material is pasted with conductive masking foil or the sheet metal of interconnection, is set on the grading shield
There is the inflating port to match with compressor gas-charging connection.
9. according to claim 1 from liter act formula large capacity series resonance pressure test apparatus, it is characterised in that：The benefit
It repays reactor unit to be formed in parallel by several reactor groups, after each reactor group high-pressure side is connected by halo-free conducting wire, with electricity
Anti- device/divider unit short circuit, each reactor group low-pressure end are grounded；When experiment, according to test product ground capacitance and expected examination
The requirement for testing resonant frequency, calculates required compensation reactor inductance value, and calculation formula is as follows：
Then the current limit of compensation reactor is calculated by formula (3), the current limit of compensation reactor is less than compensation reactor
The sum of each reactor group load current value in unit, formula (3) are as follows：
In above-mentioned calculating formula, LxInductance value, I for required compensation reactorxFor compensation reactor by current limit, f is
Resonant frequency, L are test loop total inductance amount, LoIt is that test loop is total for test loop inductance value, the C in addition to compensation reactor
Capacitance, UfIt is test loop total current value, I for pressure test voltage effective value, IorFor the specified electricity of reactor/divider unit
Flow valuve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810262560.2A CN108548995A (en) | 2018-03-28 | 2018-03-28 | It is a kind of to rise act formula large capacity series resonance pressure test apparatus certainly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810262560.2A CN108548995A (en) | 2018-03-28 | 2018-03-28 | It is a kind of to rise act formula large capacity series resonance pressure test apparatus certainly |
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| Publication Number | Publication Date |
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| CN108548995A true CN108548995A (en) | 2018-09-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100624A (en) * | 2018-09-26 | 2018-12-28 | 青海电研科技有限责任公司 | The method for pressing tower structure high-pressure frequency-conversion resonant experimental device altogether is surveyed for correction step-up |
| CN112946434A (en) * | 2021-02-01 | 2021-06-11 | 江苏粤科检测技术服务有限公司 | Electrical equipment withstand voltage test platform |
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| CN201576073U (en) * | 2009-12-18 | 2010-09-08 | 国网电力科学研究院武汉南瑞有限责任公司 | Novel power frequency withstand voltage tester for ultrahigh voltage double-break GIS |
| CN201965198U (en) * | 2010-11-30 | 2011-09-07 | 薛建仁 | Structure for superposing pressure-resistant and local discharge testing device of telescopic cable |
| CN102809673A (en) * | 2012-07-24 | 2012-12-05 | 苏州华电电气股份有限公司 | Inflatable pressure-equalizing device for high-voltage test |
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| CN207096383U (en) * | 2017-08-15 | 2018-03-13 | 广西电网有限责任公司电力科学研究院 | 750kV extra-high tension unit ac voltage withstanding test platform hydraulic pressure lifting devices |
| CN208013357U (en) * | 2018-03-28 | 2018-10-26 | 国网江苏省电力公司电力科学研究院 | It is a kind of to rise act formula large capacity series resonance pressure test apparatus certainly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201538268U (en) * | 2009-10-29 | 2010-08-04 | 南京苏特电气股份有限公司 | Variable-frequency resonance alternating-current voltage-withstanding test vehicle for power system |
| CN201576073U (en) * | 2009-12-18 | 2010-09-08 | 国网电力科学研究院武汉南瑞有限责任公司 | Novel power frequency withstand voltage tester for ultrahigh voltage double-break GIS |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100624A (en) * | 2018-09-26 | 2018-12-28 | 青海电研科技有限责任公司 | The method for pressing tower structure high-pressure frequency-conversion resonant experimental device altogether is surveyed for correction step-up |
| CN112946434A (en) * | 2021-02-01 | 2021-06-11 | 江苏粤科检测技术服务有限公司 | Electrical equipment withstand voltage test platform |
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Application publication date: 20180918 |