CN110120296A - A kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe - Google Patents
A kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe Download PDFInfo
- Publication number
- CN110120296A CN110120296A CN201910397218.8A CN201910397218A CN110120296A CN 110120296 A CN110120296 A CN 110120296A CN 201910397218 A CN201910397218 A CN 201910397218A CN 110120296 A CN110120296 A CN 110120296A
- Authority
- CN
- China
- Prior art keywords
- insulation
- insulator
- semi
- silicone rubber
- current transformer
- 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
- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 56
- 239000004945 silicone rubber Substances 0.000 title claims abstract description 45
- 238000009413 insulation Methods 0.000 claims abstract description 101
- 239000012212 insulator Substances 0.000 claims abstract description 76
- 229920001971 elastomer Polymers 0.000 claims abstract description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
- 239000010935 stainless steel Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 238000012946 outsourcing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 11
- 239000003822 epoxy resin Substances 0.000 abstract description 5
- 229920000647 polyepoxide Polymers 0.000 abstract description 5
- 230000005684 electric field Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000003712 anti-aging effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920000260 silastic Polymers 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010068 moulding (rubber) Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses a kind of Outdoor Current Transformers with semi-conductive silicone rubber pipe, including line packet, first insulator, second insulator and semi-conductive silicone rubber pipe；The insulation system of current transformer is decomposed into first insulator, second insulator by the present invention, when production, first insulator, second insulator make respectively, then it is assembled, since first insulator, the structure of second insulator are simple, the simple process made respectively, to simplify the poured with epoxy resin of integrally formed structure of becoming attached to or the manufacture craft of silicon rubber pressure forming, and invention introduces semi-conductive rubber pipes, the semiconductive pipe can balanced electric field, effectively reduce shelf depreciation.
Description
Technical field
The present invention relates to field of power electronics, in particular to a kind of outdoor Current Mutual Inductance with semi-conductive silicone rubber pipe
Device.
Background technique
Currently, protection (or measurement) Current Transformer that W32 type outdoor switch uses generallys use poured with epoxy resin
Or made of the method for silicon rubber pressure forming, but since structure is complicated for the mutual inductor, compare its cost of manufacture
Height, technical process is more complicated, and pressure resistance and partial discharge are not easy to meet the requirements of the national standard of China.How W32 type electricity is simplified
The manufacture craft of current transformer becomes a technical problem urgently to be resolved.
Summary of the invention
The object of the present invention is to provide a kind of Outdoor Current Transformers with semi-conductive silicone rubber pipe, to simplify W32 type
The manufacture craft of current transformer.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe, and the current transformer includes line
Packet, first insulator, second insulator and semi-conductive silicone rubber pipe；
The line jacket is located on the first insulation tube of the first insulator, and the conducting wire of the line packet passes through described first
The through-hole on the second insulation tube on insulator is led in the insulation column of the first insulator, and passes through insulation branch
Column is drawn；
The insulating cover of the second insulator covers in the first insulator, the third insulation tube of the second insulator
It is set in the inside of the first insulation tube of the first insulator；
The semi-conductive rubber pipe sleeve is located at the inside of the third insulating sleeve of the second insulator.
Optionally, the first insulator includes the first insulation tube, the second insulation tube, the insulation bottom of annular and insulation branch
Column；
The internal diameter at the insulation bottom is identical as the diameter of first insulation tube, the outer diameter and described second at the insulation bottom
The diameter of insulation tube is identical；
The bottom of first insulation tube is fixedly connected with the inner ring at the insulation bottom；The bottom of second insulation tube with
The outer ring at the insulation bottom is fixedly connected；
Through-hole is offered on second insulation tube, the insulation column passes through the through-hole and second insulation tube
Inside connection.
Optionally, the second insulator include annular insulating disc and third insulation tube, the third insulation tube it is straight
Diameter is identical as the internal diameter of the insulating disc, and the bottom of the third insulation tube is fixedly connected with the inner ring of the insulating disc.
Optionally, the first insulator is the integrated formed structure formed using solid rubber material cures.
Optionally, the second insulator is the integrated formed structure formed using solid rubber material cures.
Optionally, the semi-conductive silicone rubber pipe is the integrated molding formed using semi-conductive silicone rubber material cures
Structure.
Optionally, the line packet includes iron core and coil, and the coil is wrapped on the iron core.
Optionally, the conducting wire of the coil is outsourcing silicon rubber lead.
Optionally, the current transformer further includes stainless steel connecting tube, hex nut and O-ring, and the stainless steel connects
One end of adapter tube is connect with the insulation column of the first insulator, the conducting wire that the insulation column is drawn, and is led to described
The other end of the other end of stainless steel connecting tube, the stainless steel connecting tube passes through O-ring and the fixed conducting wire of hex nut.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
The invention discloses a kind of Outdoor Current Transformers with semi-conductive silicone rubber pipe, including line packet, the first insulation
Body, second insulator and semi-conductive silicone rubber pipe；Line jacket is located on the first insulation tube of the first insulator, and line packet is led
Line is led in the insulation column of first insulator by the through-hole on the second insulation tube in first insulator, and passes through insulation
Pillar is drawn；The insulating cover of second insulator covers in first insulator, and the third insulative pipe sleeve of second insulator is located at described
The inside of first insulation tube of first insulator；Semi-conductive rubber pipe sleeve is located at the third insulating sleeve of the second insulator
It is internal.The insulation system of current transformer is decomposed into first insulator, second insulator by the present invention, when production, the first insulation
Body, second insulator make respectively, are then assembled, and since first insulator, the structure of second insulator are simple, make respectively
The simple process of work, to simplify the poured with epoxy resin of integrally formed structure of becoming attached to or the production of silicon rubber pressure forming
Technique, and invention introduces semi-conductive rubber pipe, the semiconductive pipe can balanced electric field, effectively reduce part and put
Electricity.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structure chart of the Outdoor Current Transformer with semi-conductive silicone rubber pipe provided by the invention；
Fig. 2 is the structure of the first insulation tube of the Outdoor Current Transformer provided by the invention with semi-conductive silicone rubber pipe
Figure；Wherein, Fig. 2 a is the front elevation of the first insulation tube, and Fig. 2 b is the reverse side figure of the first insulation tube；
Fig. 3 is the structure of the second insulation tube of the Outdoor Current Transformer provided by the invention with semi-conductive silicone rubber pipe
Figure；Wherein, Fig. 3 a is the front elevation of the second insulation tube, and Fig. 3 b is the reverse side figure of the second insulation tube；
Fig. 4 is the semi-conductive silicone rubber pipe of the Outdoor Current Transformer provided by the invention with semi-conductive silicone rubber pipe
Structural schematic diagram；
Fig. 5 is the pictorial diagram of the line packet of the Outdoor Current Transformer provided by the invention with semi-conductive silicone rubber pipe；
Fig. 6 is the pictorial diagram of the iron core of the Outdoor Current Transformer provided by the invention with semi-conductive silicone rubber pipe；
Fig. 7 is the pictorial diagram of the accessory of the Outdoor Current Transformer provided by the invention with semi-conductive silicone rubber pipe；
Fig. 8 is a kind of work of the structure chart of the Outdoor Current Transformer with semi-conductive silicone rubber pipe provided by the invention
Schematic diagram.
Specific embodiment
The object of the present invention is to provide a kind of Outdoor Current Transformers with semi-conductive silicone rubber pipe, to simplify W32 type
The manufacture craft of current transformer.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Mode is applied to be described in further detail invention.
The present invention provides a kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe, as shown in Figure 1, the electric current is mutual
Sensor includes line packet 1,3 bodies of insulation of first insulator 2, second and semi-conductive silicone rubber pipe 4.
As shown in Fig. 2, first insulation, 2 bodies include the first insulation tube 201, the second insulation tube 202, annular insulation bottom
203 and insulation column 204；The internal diameter at the insulation bottom 203 is identical as the diameter of first insulation tube 201, the insulation bottom
203 outer diameter is identical as the diameter of second insulation tube 202；The bottom of first insulation tube 201 and the insulation bottom 203
Inner ring be fixedly connected；The bottom of second insulation tube 202 is fixedly connected with the outer ring at the insulation bottom 203；Described second
Through-hole is offered on insulation tube 202, the insulation column 204 is connected by the inside of the through-hole and second insulation tube 202
It is logical.The first insulator 2 is the integrated formed structure formed using solid rubber material cures.
As shown in figure 3, the second insulator 3 includes the insulating disc 301 and third insulation tube 302 of annular, the third
The diameter of insulation tube 302 is identical as the internal diameter of the insulating disc 301, the bottom of the third insulation tube 302 and the insulating disc
301 inner ring is fixedly connected.The second insulator is the integrated formed structure formed using solid rubber material cures.
According to Fig. 1, the line packet 1 is set on the first insulation tube 201 of the first insulator 2, and the line packet 1 is led
Line leads to the insulation column of the first insulator by the through-hole on the second insulation tube 202 in the first insulator 2
In 204, and drawn by the insulation column 204；The insulating cover 301 of the second insulator 3 is covered in the first insulator 2
On, the third insulative pipe sleeve 302 of the second insulator 3 is located at the inside of the first insulation tube 201 of the first insulator 2；
The semi-conductive rubber pipe 4 is set in the inside of the third insulating sleeve 301 of the second insulator 3.
Wherein, as shown in figure 4, the semi-conductive silicone rubber pipe 4 is to form to obtain using semi-conductive silicone rubber material cures
Integrated formed structure.As shown in figure 5, the line packet 1 includes that iron core 1-1 and coil 1-2, the coil 1-2 are wrapped in described
On iron core 1-1.The conducting wire of the coil 1-2 is outsourcing silicon rubber lead, as shown in fig. 6, the structure of the iron core 1-1 is annulus
Shape.
As illustrated in figures 1 and 7, the accessory of current transformer of the invention includes stainless steel connecting tube 5, hex nut 6 and O shape
Circle 7, one end of the stainless steel connecting tube 5 is connect with the insulation column 204 of the first insulator 2, by the insulation column
204 conducting wires drawn, lead to the other end of the stainless steel connecting tube 5, the other end of the stainless steel connecting tube 5 passes through O
Shape circle 7 and the fixed conducting wire of hex nut 6.
First insulator, second insulator and semi-conductive silicone rubber pipe of the invention selects silastic material as main exhausted
Edge has preferable insulation performance, so being easily met resistance to pressure request.
Current transformer of the invention uses silicon rubber, accessory stainless steel connecting tube, hexagon thin nut due to main body
(M20X1.5) stainless steel 1Cr18Ni9Ti is selected, accessory O-ring selects silastic material, and conductor material selects outsourcing silicon rubber
Conducting wire, so the entire product after assembling has many advantages, such as corrosion-resistant, UV radiation, anti-aging, non-maintaining.
Current transformer of the invention is in production: mutual through high temperature vulcanized production electric current using solid silicone rubber material first
The first insulator 2 of sensor and the second insulation tube body 3, using solid-state semi-conductive silicone rubber through high temperature vulcanized production current transformer
Semi-conductive silicone rubber pipe 4, due to semiconductive pipe can balanced electric field, can effectively reduce shelf depreciation.Electricity of the invention
Current transformer is through actually detected: when detection voltage is 14.4kv, local discharging level is less than 20PC；When detection voltage is 8.3kv,
Local discharging level is less than 10PC, fully meets the requirements of the national standard of China.
Then by 1 shape figure first insulator 2 of line packet, second insulator 3 and first insulator 2 are assembled together, the
One insulator 2 and second insulator 3 are interference fit, and are bonded with single component sealant, then semi-conductive silicone rubber pipe 4 is packed into
In second insulator 3, semi-conductive silicone rubber pipe 4 and second insulator 3 are interference fit.First insulator 2 and second insulator 3
It is formed after assembly with certain thickness silicon rubber encasing, plays major insulation, while embedded semi-conductive silicone rubber
Pipe 4 also solves the electric field equalization problem between a high voltage device and secondary line packet, meets " GB1208-2016 " standard regulation
Requirement.It, completely can be with since silicon rubber encasing is corrosion-resistant, ultra-violet radiation resisting, anti-aging, therefore mutual inductor long service life
It is used as outdoor mutual inductor.
Finally, accessory O-ring 7 and hexagon thin nut 6 (M20X1.5) are connected stainless steel in stainless steel connecting tube 5
Adapter tube 5 is packed into the insulation column 204 of first insulator 2, and stainless steel connecting tube 5 was still with the insulation column 204 connecting
It is full of cooperation, guarantees the stability of connection, so far complete the assembly production of entire product.
The suitable environment of prepared current transformer are as follows:
Applicable elements: suitable for voltage rating 42kV, rated frequency 50Hz AC electric power systems.
Use environment: -40 DEG C~+70 DEG C of environment temperature
Mean daily temperature :≤+ 30 DEG C
Height above sea level :≤2000m
Gradation for surface pollution: II grade
Referring to the technical parameter of current transformer Fig. 8 of the invention are as follows:
Specified primary insulation voltage (P1-P2 and coil S1-S2, S1-S3, S1-S4): 12kV, 45kV, 75kV
Rated frequency: 50-60Hz
No-load voltage ratio: A, B, C:(S1-S2) 200, (S1-S3) 400, (S1-S4) 600:5
Class of accuracy: 10P10 (0.5 grade)
Load: (S1-S2) 5VA, (S1-S3) 10VA or (S1-S4) 15VA.
Traditional current transformer is generallyd use the method for poured with epoxy resin or is vulcanized using silicon rubber integral high-temperature
Method make the mutual inductor, there is pressure resistance in the current transformer that makes according to the above method and shelf depreciation is not easy to meet national mark
It is required as defined in quasi-, production technology is more complicated, and process control is more difficult, causes rejection rate higher, current transformer of the invention
It is integrally formed to completely dispense with poured with epoxy resin, but product is divided into several parts using the high temperature vulcanized difference of solid silicone rubber
Molding, then forms complete product for assembling product after molding, the mutual inductor for simplifying process flow, and producing in this way with
The mutual inductor of traditional mode of production is compared, and properties of product are stablized, and pressure-resistant and shelf depreciation fully meets the requirement of national standard, Er Qiesheng
Producing difficulty significantly reduces, improved efficiency, and rejection rate decline has been saved artificial manufacturing cost, had a vast market foreground.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Specific examples are used herein to describe the principles and implementation manners of the present invention, the explanation of above embodiments
Method and its core concept of the invention are merely used to help understand, described embodiment is only that a part of the invention is real
Example is applied, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
Claims (9)
1. a kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe, which is characterized in that the current transformer includes line
Packet, first insulator, second insulator and semi-conductive silicone rubber pipe；
The line jacket is located on the first insulation tube of the first insulator, and the conducting wire of the line packet insulate by described first
The through-hole on the second insulation tube on body is led in the insulation column of the first insulator, and is drawn by the insulation column
Out；
The insulating cover of the second insulator covers in the first insulator, and the third insulation tube of the second insulator is arranged
In the inside of the first insulation tube of the first insulator；
The semi-conductive rubber pipe sleeve is located at the inside of the third insulating sleeve of the second insulator.
2. the Outdoor Current Transformer according to claim 1 with semi-conductive silicone rubber pipe, which is characterized in that described
One insulator includes the first insulation tube, the second insulation tube, the insulation bottom of annular and insulation column；
The internal diameter at the insulation bottom is identical as the diameter of first insulation tube, the outer diameter at the insulation bottom and second insulation
The diameter of pipe is identical；
The bottom of first insulation tube is fixedly connected with the inner ring at the insulation bottom；The bottom of second insulation tube with it is described
The outer ring at insulation bottom is fixedly connected；
Through-hole is offered on second insulation tube, the insulation column passes through the inside of the through-hole and second insulation tube
Connection.
3. the Outdoor Current Transformer according to claim 1 with semi-conductive silicone rubber pipe, which is characterized in that described
Two insulators include the insulating disc and third insulation tube of annular, the internal diameter phase of the diameter and the insulating disc of the third insulation tube
Together, the bottom of the third insulation tube is fixedly connected with the inner ring of the insulating disc.
4. the Outdoor Current Transformer according to claim 1 with semi-conductive silicone rubber pipe, which is characterized in that described
One insulator is the integrated formed structure formed using solid rubber material cures.
5. the Outdoor Current Transformer according to claim 1 with semi-conductive silicone rubber pipe, which is characterized in that described
Two insulators are the integrated formed structure formed using solid rubber material cures.
6. the Outdoor Current Transformer according to claim 1 with semi-conductive insulation rubber tube, which is characterized in that described
Semi-conductive silicone rubber pipe is the integrated formed structure formed using semi-conductive silicone rubber material cures.
7. the Outdoor Current Transformer according to claim 1 with semi-conductive silicone rubber pipe, which is characterized in that the line
Packet includes iron core and coil, and the coil is wrapped on the iron core.
8. the Outdoor Current Transformer according to claim 7 with semi-conductive silicone rubber pipe, which is characterized in that the line
The conducting wire of circle is outsourcing silicon rubber lead.
9. the Outdoor Current Transformer according to claim 1 with semi-conductive silicone rubber pipe, which is characterized in that the electricity
Current transformer further includes stainless steel connecting tube, hex nut and O-ring, and one end of the stainless steel connecting tube is exhausted with described first
The insulation column of edge body connects, and the conducting wire that the insulation column is drawn leads to the other end of the stainless steel connecting tube, institute
The other end for stating stainless steel connecting tube passes through O-ring and the fixed conducting wire of hex nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910397218.8A CN110120296A (en) | 2019-05-14 | 2019-05-14 | A kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910397218.8A CN110120296A (en) | 2019-05-14 | 2019-05-14 | A kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110120296A true CN110120296A (en) | 2019-08-13 |
Family
ID=67522230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910397218.8A Pending CN110120296A (en) | 2019-05-14 | 2019-05-14 | A kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110120296A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114823103A (en) * | 2022-05-24 | 2022-07-29 | 江苏靖江互感器股份有限公司 | Epoxy pouring type current transformer and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204270857U (en) * | 2014-12-12 | 2015-04-15 | 开元电气大厂有限公司 | LBW32-10 type switch protection Current Transformer |
| CN206758260U (en) * | 2017-02-21 | 2017-12-15 | 杭州零尔电力科技有限公司 | Pole-mounted circuit breaker single-phase current transformer |
| CN210349541U (en) * | 2019-05-14 | 2020-04-17 | 中建能科技(北京)有限公司 | Outdoor current transformer with semi-conductive silicone rubber tube |
-
2019
- 2019-05-14 CN CN201910397218.8A patent/CN110120296A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204270857U (en) * | 2014-12-12 | 2015-04-15 | 开元电气大厂有限公司 | LBW32-10 type switch protection Current Transformer |
| CN206758260U (en) * | 2017-02-21 | 2017-12-15 | 杭州零尔电力科技有限公司 | Pole-mounted circuit breaker single-phase current transformer |
| CN210349541U (en) * | 2019-05-14 | 2020-04-17 | 中建能科技(北京)有限公司 | Outdoor current transformer with semi-conductive silicone rubber tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114823103A (en) * | 2022-05-24 | 2022-07-29 | 江苏靖江互感器股份有限公司 | Epoxy pouring type current transformer and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2006047922A1 (en) | An organic combined insulated dry electronic transformer for outputting the optical signals | |
| CN101710655B (en) | On-line monitoring grounding wire lead-out structure of high-voltage sleeve | |
| CN104635056B (en) | A kind of method for calculating three-core cable transition joint aluminium hydraulic pressed connecting pipe contact resistance | |
| CN201174264Y (en) | Tubular dielectric bus | |
| CN104655897B (en) | A kind of heat loss through convection divider | |
| CN110120296A (en) | A kind of Outdoor Current Transformer with semi-conductive silicone rubber pipe | |
| CN111463001B (en) | Combined transformer for pole-mounted switch based on high-voltage ceramic capacitor | |
| CN201262881Y (en) | Single-phase testing transformer | |
| CN210073597U (en) | Outdoor three-phase integrated current transformer with stress cone and semiconductor tube | |
| CN210349541U (en) | Outdoor current transformer with semi-conductive silicone rubber tube | |
| CN209216733U (en) | 2000kV oil-impregnated paper condenser type transformer bushing | |
| JP5281444B2 (en) | Multistage DC high-voltage power supply device and X-ray device | |
| CN206497147U (en) | A kind of multi-function electronic current-voltage transformer | |
| CN105515000B (en) | The device of AC power frequency supply is obtained in AC high-voltage electric transmission line | |
| CN2773870Y (en) | Hopper-sensing insulated transformer with big power UPS and double iron core | |
| CN206583956U (en) | A kind of electronic current voltage transformer | |
| CN203260457U (en) | Intelligent dry type glass fiber reinforced plastic transformer sleeve | |
| CN206460867U (en) | A kind of electronic current voltage transformer | |
| CN201229847Y (en) | Weak output capacitor type voltage mutual inductor | |
| CN214226654U (en) | Pull-cage type structure composite casing zinc oxide lightning arrester | |
| CN206618792U (en) | A kind of multi-function electronic current-voltage transformer | |
| CN107134356A (en) | A kind of Dry Type High Tension Current Transformer | |
| CN210837328U (en) | Glazed wire-wound resistor | |
| CN110967544B (en) | Sleeve type voltage and current sensor for distribution transformer | |
| CN117706146B (en) | Self-absorption overvoltage type direct-current distribution voltage sensor |
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 |