CN108627683A - One kind ± 1100kV dividers - Google Patents
One kind ± 1100kV dividers Download PDFInfo
- Publication number
- CN108627683A CN108627683A CN201710176803.6A CN201710176803A CN108627683A CN 108627683 A CN108627683 A CN 108627683A CN 201710176803 A CN201710176803 A CN 201710176803A CN 108627683 A CN108627683 A CN 108627683A
- Authority
- CN
- China
- Prior art keywords
- grading ring
- ring group
- arm unit
- hollow casing
- grading
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
- G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Include high-pressure side grading ring component, high pressure arm unit, low-pressure end grading ring component, low pressure arm unit and pedestal the present invention relates to one kind, the low pressure arm unit is located on pedestal；Further include the first insulated hollow casing and the second insulating inner tube, second insulating inner tube is located in the first insulated hollow casing, and high pressure arm unit is located in the second insulating inner tube, pedestal and the first insulated hollow casing connection, and low-pressure end grading ring component is located at one end of the first insulated hollow casing；The high-pressure side grading ring component includes first support, and it is fixed on two grading ring groups and high-pressure side connecting terminal in first support, the first support is located at the other end of the first insulated hollow casing, and two grading ring groups are constituted in ball-type either in the envelope structure of spheroid shape；The both ends of high pressure arm unit are connect with the other end of high-pressure side connecting terminal and low pressure arm unit respectively.This invention ensures that nearby field strength distribution is uniform for high-pressure side, and reduce local electric field strength.
Description
Technical field
The present invention relates to a kind of dividers, and in particular to a kind of ± 1100kV that can measure 1100kV line voltages
Divider.
Background technology
With the increase of exchange transmission capacity, the growth of circuit distance and the complication of electric network composition, AC system
The problems such as stability, limiting short-circuit current, pressure regulation, becomes increasingly conspicuous.Direct current transportation is in high-power super-pressure long distance power transmission, cable
Transmission of electricity and non-synchronous networking etc. have shown that than exchanging more advantages.Direct current transportation can be coupled frequency and voltage not
Two same AC networks, while circuit DC losses are small, without reactive loss, transmission capacity can be very big, therefore more passes through
Ji is reliable.
The extra-high HVDC Transmission Technologies of ± 800kV are the highest HVDC Transmission Technology of domestic voltage, existing direct current point at present
Depressor can only meet the measurement of DC voltage on ± 800kV polar curves, the DC voltage being unable to measure on ± 1100kV polar curves.One
The reason is that insulation performance is inadequate；Another more crucial bottleneck is exactly the design of high-pressure side grading ring.
Due to the concentration of electric field, internal shelf depreciation is will produce at the interface between fault in material or different materials, this
The decline that the surrounding insulation material of divider high-pressure side can be caused premature aging occur so as to cause insulation performance.
The Equalized voltage ring construction of divider is generally using the embodiment of single big ring at present, though this grading ring can rise
To certain uniform electric field, inhibit the effect of corona and galvano-cautery, but can only under ± 800kV voltage class reliability service, when
Under voltage increase to the extreme high voltage grade of ± 1100kV, high-pressure side connecting terminal nearby will produce larger corona, influence equipment
Safety, even results in air breakdown, performance cannot be satisfied requirement.Although this can be improved by increasing grading ring area and volume
Problem, but this is also along with the increase of divider volume and cost.
Invention content
The purpose of the present invention is：It is uniform to provide a kind of neighbouring field strength distribution of guarantee high-pressure side, while reducing internal field
± 1100kV the dividers of intensity, it can meet the measurement of ± 1100kV direct-current polar voltages, by optimizing and improving
Pressure ring designs, and the bottleneck of DC voltage on 800kV polar curves only up to be measured by breaking existing divider.
In order to achieve the above object, the technical scheme is that：One kind ± 1100kV dividers, including high-pressure side
Grading ring component, high pressure arm unit, low-pressure end grading ring component, low pressure arm unit and pedestal, the low pressure arm unit are located at bottom
On seat, and one end of low pressure arm unit is connect with pedestal；Its innovative point is：
Further include the first insulated hollow casing and the second insulating inner tube, second insulating inner tube is located at the first insulated hollow
In casing, and high pressure arm unit is located in the second insulating inner tube, and the pedestal is fixedly connected with the first insulated hollow casing, and low
Pressure side grading ring component is located at one end of the first insulated hollow casing；
The high-pressure side grading ring component includes first support, and be fixed in first support the first grading ring group,
Second grading ring group and high-pressure side connecting terminal, the first support are located at the other end of the first insulated hollow casing, and described
One grading ring group is located above the second grading ring group, and the first grading ring group and the second grading ring group constitute and be either in ball-type
The envelope structure of spheroid shape, the first grading ring group and the second grading ring group include two or more ring diameters not etc.
Grading ring；
The both ends of the high pressure arm unit are connect with the other end of high-pressure side connecting terminal and low pressure arm unit respectively.
In the above-mentioned technical solutions, the first grading ring group and the second grading ring group include a big ring and a small ring,
The small ring of the first grading ring group is located at the top of the big ring of the first grading ring group, and the big ring of the second grading ring group is located at
Between the small ring of second grading ring group and the big ring of the first grading ring group.
In the above-mentioned technical solutions, the high pressure arm unit in second insulating inner tube is by capacitance-resistances more than two sections or two sections
Unit is in series, and the capacitor resistor unit often saved after the series connection of multiple precision resistances with equalizing capacitance by being formed in parallel.
In the above-mentioned technical solutions, the low pressure arm unit is made of precision resistance and capacitance parallel connection.
In the above-mentioned technical solutions, the first insulated hollow casing, the second insulating inner tube and high pressure arm unit have same
One axis.
In the above-mentioned technical solutions, the first insulated hollow casing and the second insulating inner tube are connected, and the first insulation
It is equipped with insulating radiation gas in hollow bushing and the second insulating inner tube.
In the above-mentioned technical solutions, it is equipped with by SF6, N in the first insulated hollow casing and the second insulating inner tube2、
SF6 and N2Mix the insulating radiation gas constituted.
In the above-mentioned technical solutions, the distance between big ring and small ring of the first grading ring group be 650mm~
750mm, the distance between big ring and small ring of the second grading ring group are 650mm~750mm.
The low-pressure end grading ring component includes second support, and fixed grading ring on the secondary support bracket, and described the
Two holders are fixed on one end of the first insulated hollow casing.
Several pressure gauges and micro- water density transmitter are additionally provided on the first insulated hollow casing.
Good effect possessed by the present invention is：After ± 1100kV dividers using the present invention, due to the present invention
Further include the first insulated hollow casing and the second insulating inner tube, second insulating inner tube is located in the first insulated hollow casing,
And high pressure arm unit is located in the second insulating inner tube, the pedestal is fixedly connected with the first insulated hollow casing, and low-pressure end is equal
Pressure ring assembly is located at one end of the first insulated hollow casing, in this way it can be ensured that the dielectric strength of the present invention；Again due to the height
Pressure side grading ring component includes first support, and be fixed in first support the first grading ring group, the second grading ring group and
High-pressure side connecting terminal, the first support are located at the other end of the first insulated hollow casing, and the first grading ring group is located at
Above second grading ring group, and the first grading ring group and the second grading ring group are constituted in ball-type either in the envelope knot of spheroid shape
Structure, the first grading ring group and the second grading ring group include the grading ring of two or more ring diameters not etc., the height
The both ends of pressure arm unit are connect with the other end of high-pressure side connecting terminal and low pressure arm unit respectively, in this manner it is ensured that this hair
The inside field strength of bright high-pressure side is evenly distributed, while reducing local electric field strength, reduce corona, galvano-cautery, breakdown can
Energy property can accurately measure ± 1100kV direct-current polar voltages under the premise of meeting insulation performance and good pressure characteristic,
The bottleneck of DC voltage on 800kV polar curves only up to be measured by breaking existing divider.
Description of the drawings
Fig. 1 is a kind of dimensional structure diagram of specific implementation mode of the present invention；
Fig. 2 is the cross-sectional view of Fig. 1；
Fig. 3 is the portions the I amplification of Fig. 2；
In figure：1- high-pressure side grading ring components；2- silicon rubber composite hollow casings；3- capacitor resistor units；4- high pressure arm units；
Epoxy tube in 5-；6- low-pressure end grading ring components；7- low pressure arm units；8- pedestals；9- precision resistances；10- equalizing capacitances.
Specific implementation mode
Below in conjunction with attached drawing and the embodiment provided, the present invention is further illustrated, and however, it is not limited to this.
As shown in Figure 1, 2, 3, one kind ± 1100kV dividers, including high-pressure side grading ring component 1, high pressure arm unit
4, low-pressure end grading ring component 6, low pressure arm unit 7 and pedestal 8, the low pressure arm unit 7 is located on pedestal 8, and low-voltage arm list
One end of member 7 is connect with pedestal 8 (ground terminal)；The degree of protection of the pedestal 8 is IP67.
Further include the first insulated hollow casing 2 and the second insulating inner tube 5, second insulating inner tube 5 is located at the first insulation
In hollow bushing 2, and high pressure arm unit 4 is located in the second insulating inner tube 5, and the pedestal 8 and the first insulated hollow casing 2 are fixed
Connection, and low-pressure end grading ring component 6 is located at one end of the first insulated hollow casing 2；
The high-pressure side grading ring component 1 includes first support 1-1, and first be fixed on first support 1-1 is
Pressure ring group 1-2, the second grading ring group 1-3 and high-pressure side connecting terminal 1-4, the first support 1-1 are located at the first insulated hollow
The other end of casing 2, the first grading ring group 1-2 are located above the second grading ring group 1-3, and the first grading ring group 1-2 and
Second grading ring group 1-3 is constituted in ball-type either in the envelope structure of spheroid shape, and the first grading ring group 1-2 and second is equal
Pressure ring group 1-3 includes the grading ring that two or more ring diameters do not wait；
The both ends of the high pressure arm unit 4 connect with the other end of high-pressure side connecting terminal 1-4 and low pressure arm unit 7 respectively
It connects.
As shown in Figure 1, 2, in order to further increase the inside field strength distributing homogeneity of high-pressure side, the first grading ring group
1-2 and the second grading ring group 1-3 is divided into the two symmetrical above and below double-deck Equalized voltage ring constructions on first support 1-1, and described first
Grading ring group 1-2 and the second grading ring group 1-3 includes a big ring and a small ring, the small ring position of the first grading ring group 1-2
In the top of the big ring of the first grading ring group 1-2, the big ring of the second grading ring group 1-3 is located at the second grading ring group 1-3's
Between small ring and the big ring of the first grading ring group 1-2.The first support 1-1 is articles made of aluminium alloy, certainly, it is not limited to
This, can also select other types of metallic article.The big ring of the first grading ring group 1-2 and the second grading ring group 1-3
Ring diameter is equal, and the ring diameter of the small ring of the first grading ring group 1-2 and the second grading ring group 1-3 is equal.
As shown in Fig. 2, for the ease of sensing DC voltage between high pressure arm unit 4 and low pressure arm unit 7, described second absolutely
High pressure arm unit 4 in edge inner tube 5 is in series by capacitor resistor units 3 more than two sections or two sections, and the capacitor resistor unit 3 often saved by
Be formed in parallel with equalizing capacitance after the series connection of multiple precision resistances, resistance value is 50 to 200M Ω, capacitance be 715 to
2860pF.The total resistance value of the high pressure arm unit 4 is 500 to 2200M Ω, and total capacitance value is 65 to 260pF；The low-voltage arm
Unit 7 is made of precision resistance 9 and 10 parallel connection of capacitance.The total resistance value of the low pressure arm unit 7 is 25 to 100K Ω, total capacitance
Value is 1.43 to 5.72 μ F.The precision resistance 9 using high-power accurate high value resistor, the class of accuracy of resistance be at least 0.1 grade,
Temperature coefficient is 10ppm.
As shown in Fig. 2, in order to ensure the first insulated hollow casing 2, the second insulating inner tube 5 and high pressure arm unit 4
Uniformity, the first insulated hollow casing 2, the second insulating inner tube 5 and high pressure arm unit 4 have same axis.
As shown in Fig. 2, in order to improve dielectric strength, and complete the heat dissipation of inner cavity, 2 He of the first insulated hollow casing
Second insulating inner tube 5 is connected, and is equipped with insulating radiation gas in the first insulated hollow casing 2 and the second insulating inner tube 5.Institute
It states and is equipped with by SF6, N in the first insulated hollow casing 2 and the second insulating inner tube 52, SF6 and N2Mix the insulating radiation gas constituted
Body.Certainly, it is not limited to this, the gas that other similar qualities are stablized can also be selected to improve dielectric strength and complete to radiate.
In order to enable structure of the invention is more reasonable, the distance between big ring and small ring of the first grading ring group 1-2
For 650mm~750mm, the distance between the big ring and small ring of the second grading ring group 1-3 are 650mm~750mm.Described
Grading ring ring diameter Φ (grading ring cross-sectional diameter) 600mm of one grading ring group 1-2 and the second grading ring group 1-3, big ring center
Diameter of phi 3000mm, small ring central diameter Φ 1800mm, distance is 700mm between big or small ring.
As shown in Fig. 2, in order to further increase the reasonability of structure of the invention, the low-pressure end grading ring component 6 includes
Second support 6-1, and the grading ring 6-2, the second support 6-1 that are fixed on second support 6-1 are fixed on the first insulation
One end of hollow bushing 2.The grading ring 6-2 using ring diameter Φ 400mm, central diameter Φ 1700mm monocycle.
In order to detect pressure and water density, several pressure gauges are additionally provided on the first insulated hollow casing 2 of the present invention
With micro- water density transmitter.And pressure gauge and micro- water density transmitter are mounted on the position of ground handling personnel's observable.
First insulated hollow casing 2 of the present invention is silicon rubber composite hollow casing, and second insulating inner tube 5 is interior
Epoxy tube is in order to ensure insulating properties, certainly in this way, it is not limited to this, porcelain tube or other types of exhausted can also be selected
Edge pipe.
The preferred embodiment of the present invention, 2 overall length of the first insulated hollow casing are 15500mm, and internal diameter is Φ 800, dry arc
Distance is 14400mm, creepage distance 63954mm.
The effect of high-pressure side grading ring mainly reduces on high-pressure side the current potential that in air or certain portion faces are excessively high
Gradient, the shielding to high-pressure side outer surface electric field draw away power frequency arc, reduce corona, avoid shelf depreciation, to reduce surface corruption
The possibility of erosion and pollution flashover.Electric field feelings can be obviously improved to the preferred arrangement of the high-pressure side grading ring of superhigh voltage DC divider
Condition.Under action of high voltage, entirety field distribution of the present invention is uniform.It is external in switching impulse withstanding voltage 2100kV
Maximum field strength concentrates on high-pressure side grading ring component outer edge region, is less than the disruptive field intensity of air；Meanwhile high-pressure side grading ring
An order of magnitude is reduced under single grading ring scheme in the maximum field strength and prior art of component internal.
In conclusion this invention ensures that the inside field strength of high-pressure side is evenly distributed, while local electric field strength is reduced,
Reduce corona, galvano-cautery, breakdown possibility, meet insulation performance and it is good press characteristic under the premise of, Neng Goujing
True measurement ± 1100kV direct-current polar voltages, DC voltage on 800kV polar curves only up to be measured by breaking existing divider
Bottleneck.
Claims (10)
1. one kind ± 1100kV dividers, including high-pressure side grading ring component (1), high pressure arm unit (4), low-pressure end are pressed
Ring assemblies (6), low pressure arm unit (7) and pedestal (8), the low pressure arm unit (7) is located on pedestal (8), and low pressure arm unit
(7) one end is connect with pedestal (8)；It is characterized in that：
Further include the first insulated hollow casing (2) and the second insulating inner tube (5), second insulating inner tube (5) is located at first absolutely
In edge hollow bushing (2), and high pressure arm unit (4) is located in the second insulating inner tube (5), and the pedestal (8) and the first insulation are empty
Heart casing (2) is fixedly connected, and low-pressure end grading ring component (6) is located at one end of the first insulated hollow casing (2)；
The high-pressure side grading ring component (1) includes first support (1-1), and first be fixed in first support (1-1)
Grading ring group (1-2), the second grading ring group (1-3) and high-pressure side connecting terminal (1-4), the first support (1-1) are located at
The other end of one insulated hollow casing (2), the first grading ring group (1-2) are located above the second grading ring group (1-3), and the
One grading ring group (1-2) and the second grading ring group (1-3) are constituted in ball-type either in the envelope structure of spheroid shape, and described first
Grading ring group (1-2) and the second grading ring group (1-3) include the grading ring of two or more ring diameters not etc.；
The both ends of the high pressure arm unit (4) connect with the other end of high-pressure side connecting terminal (1-4) and low pressure arm unit (7) respectively
It connects.
2. ± 1100kV dividers according to claim 1, it is characterised in that：The first grading ring group (1-2)
Include a big ring and a small ring with the second grading ring group (1-3), the small ring of the first grading ring group (1-2) is located at first
The big ring of the top of the big ring of pressure ring group (1-2), the second grading ring group (1-3) is located at the small of the second grading ring group (1-3)
Between ring and the big ring of the first grading ring group (1-2).
3. ± 1100kV dividers according to claim 1, it is characterised in that：In second insulating inner tube (5)
High pressure arm unit (4) it is in series by capacitor resistor units (3) more than two sections or two sections, and the capacitor resistor unit (3) often saved is by more
It is formed in parallel with equalizing capacitance after a precision resistance series connection.
4. ± 1100kV dividers according to claim 1, it is characterised in that：The low pressure arm unit (7) is by essence
Cipher telegram hinders (9) and capacitance (10) composition in parallel.
5. ± 1100kV dividers according to claim 1, it is characterised in that：The first insulated hollow casing
(2), the second insulating inner tube (5) and high pressure arm unit (4) have same axis.
6. ± 1100kV dividers according to claim 1, it is characterised in that：The first insulated hollow casing
(2) it is connected with the second insulating inner tube (5), and insulation is equipped in the first insulated hollow casing (2) and the second insulating inner tube (5)
Radiate gas.
7. ± 1100kV dividers according to claim 6, it is characterised in that：The first insulated hollow casing
(2) and in the second insulating inner tube (5) it is equipped with by SF6, N2, SF6 and N2Mix the insulating radiation gas constituted.
8. ± 1100kV dividers according to claim 2, it is characterised in that：The first grading ring group (1-2)
Big ring and the distance between small ring be 650mm~750mm, between the big ring and small ring of the second grading ring group (1-3)
Distance is 650mm~750mm.
9. ± 1100kV dividers according to claim 1, it is characterised in that：The low-pressure end grading ring component
(6) include second support (6-1), and the grading ring (6-2) being fixed in second support (6-1), the second support (6-1)
It is fixed on one end of the first insulated hollow casing (2).
10. ± 1100kV dividers according to claim 1, it is characterised in that：The first insulated hollow casing
(2) several pressure gauges and micro- water density transmitter are additionally provided on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176803.6A CN108627683A (en) | 2017-03-23 | 2017-03-23 | One kind ± 1100kV dividers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176803.6A CN108627683A (en) | 2017-03-23 | 2017-03-23 | One kind ± 1100kV dividers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108627683A true CN108627683A (en) | 2018-10-09 |
Family
ID=63707302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176803.6A Pending CN108627683A (en) | 2017-03-23 | 2017-03-23 | One kind ± 1100kV dividers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108627683A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297897A (en) * | 2018-12-13 | 2019-02-01 | 福州大学 | The experimental rig and method of the high voltage electric field environmental corrosion of controllable temperature and humidity |
| CN110010351A (en) * | 2019-04-26 | 2019-07-12 | 无锡市联达电器有限公司 | A kind of extra-high voltage equalizing capacitor capacitance-resistance device |
| CN110441574A (en) * | 2019-08-12 | 2019-11-12 | 常州博瑞电力自动化设备有限公司 | Direct current voltage divider |
| CN110596442A (en) * | 2019-08-12 | 2019-12-20 | 常州博瑞电力自动化设备有限公司 | Electronic voltage transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323640A (en) * | 2013-06-25 | 2013-09-25 | 中国西电电气股份有限公司 | Extra-high-voltage direct-voltage voltage divider with heat dissipation device |
| CN204989277U (en) * | 2015-08-20 | 2016-01-20 | 中国电力科学研究院 | Take temperature monitoring's dc voltage divider |
| CN105629017A (en) * | 2014-11-03 | 2016-06-01 | 西安华伟光电技术有限公司 | High-voltage direct-current voltage divider standardized assembly |
| CN106468729A (en) * | 2015-08-20 | 2017-03-01 | 中国电力科学研究院 | A kind of divider with radiator structure |
-
2017
- 2017-03-23 CN CN201710176803.6A patent/CN108627683A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323640A (en) * | 2013-06-25 | 2013-09-25 | 中国西电电气股份有限公司 | Extra-high-voltage direct-voltage voltage divider with heat dissipation device |
| CN105629017A (en) * | 2014-11-03 | 2016-06-01 | 西安华伟光电技术有限公司 | High-voltage direct-current voltage divider standardized assembly |
| CN204989277U (en) * | 2015-08-20 | 2016-01-20 | 中国电力科学研究院 | Take temperature monitoring's dc voltage divider |
| CN106468729A (en) * | 2015-08-20 | 2017-03-01 | 中国电力科学研究院 | A kind of divider with radiator structure |
Non-Patent Citations (1)
| Title |
|---|
| 刘振亚: "《特高压交流电气设备》", 31 December 2008 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297897A (en) * | 2018-12-13 | 2019-02-01 | 福州大学 | The experimental rig and method of the high voltage electric field environmental corrosion of controllable temperature and humidity |
| CN109297897B (en) * | 2018-12-13 | 2023-08-18 | 福州大学 | Temperature and humidity controllable high-voltage electric field environment corrosion test device and method |
| CN110010351A (en) * | 2019-04-26 | 2019-07-12 | 无锡市联达电器有限公司 | A kind of extra-high voltage equalizing capacitor capacitance-resistance device |
| CN110441574A (en) * | 2019-08-12 | 2019-11-12 | 常州博瑞电力自动化设备有限公司 | Direct current voltage divider |
| CN110596442A (en) * | 2019-08-12 | 2019-12-20 | 常州博瑞电力自动化设备有限公司 | Electronic voltage transformer |
| CN110441574B (en) * | 2019-08-12 | 2022-05-13 | 常州博瑞电力自动化设备有限公司 | Direct current voltage divider |
| CN110596442B (en) * | 2019-08-12 | 2022-06-07 | 常州博瑞电力自动化设备有限公司 | Electronic voltage transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108627683A (en) | One kind ± 1100kV dividers | |
| TWI487227B (en) | Apparatus and method for limiting transmission of fault current | |
| CN104655896B (en) | A kind of detachable alternating current-direct current divider | |
| CN105161230B (en) | Synthetic fibers strengthen resin high-pressure sleeve pipe | |
| CN1912638A (en) | Can type capacitor voltage mutual inductor | |
| CN101878572A (en) | High voltage fault current limiter having immersed phase coils | |
| CN2914278Y (en) | Single-phase auto-powerstat | |
| CN204991304U (en) | Synthetic fiber reinforced resins high -tension bushing | |
| CN207719768U (en) | A kind of composite dry-type wall bushing | |
| CN202584884U (en) | Insulation shielding type tubular bus | |
| CN110994506A (en) | High voltage bushing and method for passing voltage and current through a building or wall | |
| CN208093344U (en) | A kind of dc circuit breaker energy supply transformer | |
| CN208298665U (en) | Inverter and transformer all-in-one machine | |
| CN109243728A (en) | A kind of DC gas insulated metal enclosed electric transmission line isolator | |
| CN201060735Y (en) | Positive and negative 500kV DC current sensor | |
| CN209374242U (en) | A kind of damping unit | |
| Kwag et al. | Research on the insulation design of a 154 kV class HTS power cable and termination | |
| CN113742871A (en) | Cable support design method for eliminating electromagnetic circulation | |
| CN207424133U (en) | A kind of three-phase Y type heavy current testers | |
| CN107910182A (en) | A kind of flexible circuit conductor high-voltage capacitor | |
| CN104332258B (en) | The high-voltage wall bushing improved | |
| US20210407710A1 (en) | Superconducting current limiter having composite insulation structure | |
| CN207719011U (en) | Four cracking H grade insulation dry transformers | |
| CN201674149U (en) | Inflatable ring network switch cabinet | |
| CN201374227Y (en) | Ultra-high-voltage porcelain-bushing gapless zinc oxide arrester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181009 |