CN109116220A - Withstand test device used for high-voltage switch - Google Patents
Withstand test device used for high-voltage switch Download PDFInfo
- Publication number
- CN109116220A CN109116220A CN201710651963.1A CN201710651963A CN109116220A CN 109116220 A CN109116220 A CN 109116220A CN 201710651963 A CN201710651963 A CN 201710651963A CN 109116220 A CN109116220 A CN 109116220A
- Authority
- CN
- China
- Prior art keywords
- earth brace
- cover
- test device
- voltage switch
- conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The present invention relates to the Withstand test devices used for high-voltage switch in high-voltage electrical appliances field, including the cover for being docked with high-tension switch gear, the earth brace for connection to be connected with disconnecting switch conductor is actively equipped on the cover, earth brace and cover are slidingly sealed cooperation, earth brace have with the disconnecting switch separation position free of conductors to carry out insulation against ground test, also have be connected with disconnecting switch conductor to carry out the conducting position of fracture Insulation Test.Cover is docked on high-tension switch gear when use, when earth brace is in separation position, earth brace is separated with disconnecting switch conductor, can carry out insulation against ground test；When earth brace is on, earth brace is connected with disconnecting switch conductor, and disconnecting switch conductor is grounded, and can carry out port isolation test；Pressure test frock has the function of insulation against ground test and fracture Insulation Test simultaneously, does not need to replace different toolings during test, does not need that gas treatment is repeated, test efficiency is higher.
Description
Technical field
The present invention relates to the Withstand test devices used for high-voltage switch in high-voltage electrical appliances field.
Background technique
Along with the rapid growth of electricity needs, GIS is compact-sized with its, occupied area is small, environmental resistance ability is strong, behaviour
Many advantages, such as making safety, good appearance, is widely used.Breaker, disconnecting switch be it is most important in high-voltage switch electric appliance and
Most commonly used electric elements, since its usage amount is big, functional reliability requires height, has important meaning to the reliability service of power grid
Justice.In order to guarantee to carry out a series of experiments before its good performance, breaker, disconnecting switch need dispatch from the factory, wherein Insulation Test
It is the important indicator of its Performance Assessment, Insulation Test frequently includes over the ground and fracture Insulation Test.
In order to reduce GIS amount of on-site installation, as shown in Figure 1, breaker 101, keeping apart the original parts such as 102 and would generally organize and stand into
One OB unit；It when carrying out Insulation Test, adds high pressure in the side of OB unit, Withstand test device 103 is installed in the other side, resistance to
Compression testing device 103 has the cover for docking with high-tension switch gear；It, will be on OB unit when carrying out insulation against ground test
All fractures closure, Withstand test device 103 high-pressure side tail end rise shielding action；It, will when carrying out fracture Insulation Test
Fracture to be tested is needed to open, remaining fracture closure, fracture side adds high pressure, and the other side is grounded by Withstand test device 103.
Previous Withstand test device only has the function of insulation against ground test function or only has fracture Insulation Test, is carrying out over the ground
After Insulation Test, another device for being able to carry out fracture Insulation Test is needed replacing, the front and back of experimental rig is replaced, also needs
Gas treatment is repeated, test efficiency is low.
Summary of the invention
The purpose of the present invention is to provide a kind of Withstand test devices used for high-voltage switch, to solve existing pressure test
The lower problem of working efficiency existing for device.
To achieve the above object, the technical solution of Withstand test device used for high-voltage switch of the invention is: used for high-voltage switch
Withstand test device includes the cover for docking with high-tension switch gear, be actively equipped on the cover for keep apart
The earth brace of conductor conducting connection is closed, earth brace and cover are slidingly sealed cooperation, and earth brace has free of conductors with disconnecting switch
To carry out the separation position of insulation against ground test, also has and be connected with disconnecting switch conductor to carry out the conducting of fracture Insulation Test
Position.
The cover is equipped with the earth brace being arranged for earth brace activity and perforates, and earth brace perforation is equipped with for ground connection
Bar axially carries out the locking structure of locking positioning along earth brace.
The locking structure include for earth brace guiding installation guide holder, for earth brace to be held tightly holding set and
In the lock sleeve that will hold cover locking tightly, for guide holder spinning in earth brace perforation, the side wall for holding set tightly is equipped with fracture, holds set tightly
The side towards guide holder be the conical surface, guide holder is equipped with and holds that cover upper cone structure compatible for holding set press tightly tightly
Cone slot, lock sleeve spinning on guide holder and for hold tightly set provide towards guide holder pressing force.
The guide holder be used for and the inner wall that is slidably matched of earth brace be equipped with for realizing earth brace and guide holder it
Between be slidingly sealed the K-type sealing ring of cooperation.
The end face towards cover inner opposite end of earth brace is equipped with slot, and slip joint is equipped in slot and is connect to sliding
Head provides the spring of elastic force, and slip joint is equipped with the long hole axially extending along slip joint, is movably equipped with backing pin in long hole,
The cell wall of the slot of earth brace is equipped with the jack being inserted into for backing pin.
The earth brace include the fixed core part being fixedly provided on cover and with the removable company in fixed core part
The removable shank portion connect.
Withstand test device used for high-voltage switch includes the end cover being arranged on the outside of cover, and end cover is equipped with and is used for
Accommodate the accommodating chamber of the fixed core part of earth brace.
The cover is equipped with charge valve.
Withstand test device used for high-voltage switch includes the shielding part for being fixed on disconnecting switch conductor, and shielding part includes
Shielding case, be arranged on shielding case for be connected with disconnecting switch conductor connect shielding part conductor and for shielding part to be led
Body is fixed to the shielding part fixing bolt on disconnecting switch conductor.
The shielding part fixing bolt is equipped with the arc concave surface that positioning is pressed and formed for earth brace, and earth brace passes through
Shielding part fixing bolt and connect with disconnecting switch conductor.
The beneficial effects of the present invention are: using when cover is docked on high-tension switch gear, when earth brace is in separation
Earth brace is separated with disconnecting switch conductor when position, can carry out insulation against ground test；When earth brace is on earth brace with
The conducting of disconnecting switch conductor, disconnecting switch conductor are grounded, and can carry out port isolation test；Pressure test frock used for high-voltage switch
Have the function of insulation against ground test, fracture Insulation Test simultaneously；It does not need to replace different toolings during pressure test, not need
Gas treatment is repeated, test efficiency is higher.
Further, cover is equipped with the earth brace passed through for earth brace and perforates, and earth brace perforation is equipped with for docking
The thin end of the scroll carries out the locking structure of locking, and locking structure includes guide holder, and guide holder is equipped with fixed core part, fixed core portion
That divides is equipped with slip joint towards one end on the inside of cylinder and for providing the elastic construction of elastic force to slip joint；Earth brace
By slip joint and disconnecting switch conductor Elastic Contact, it is very stiff and demanding and generate metal fillings to prevent from occurring when contact metal.
Further, it is arranged on fixed core part and holds set tightly, hold set and guide holder tightly for cone match, on guide holder
It is additionally provided with for after locking cover screwing, holding set and fixed link tightly to the lock sleeve for covering and providing towards the pressing force of guide holder is held tightly
Body portion locking prevents earth brace under the action of the pressure difference of cover medial and lateral to atmosphere Slideslip so that slider with
The connection of disconnecting switch conductor is more firm.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the OB unit being made of breaker, disconnecting switch；
Fig. 2 is the structural schematic diagram of Withstand test device used for high-voltage switch of the invention when carrying out insulation against ground test；
Fig. 3 is the enlarged drawing at the A in Fig. 2；
Fig. 4 is the structural schematic diagram of Withstand test device used for high-voltage switch of the invention when carrying out fracture Insulation Test；
Fig. 5 is the structural schematic diagram of the slip joint in Fig. 3；
Fig. 6 is the left view of Fig. 5；
Fig. 7 is the structural schematic diagram of the holding set in Fig. 3；
Fig. 8 is the left view of Fig. 7；
Fig. 9 is the structural schematic diagram of the shielding part fixture nut in Fig. 2；
Figure 10 is the right view of Fig. 9.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment of Withstand test device used for high-voltage switch of the invention, as shown in Figures 1 to 10, including for
The cover of high-tension switch gear to be detected docking, cover include cylinder 1 and the end cap 2 that is arranged on cylinder 1, the left end of cylinder 1
For docking with high-tension switch gear, the right end of cylinder 1 is arranged in end cap 2, and end cap 2 is equipped with the earth brace passed through for earth brace
Perforation, earth brace perforation are equipped with the locking structure for carrying out locking positioning to earth brace.
The side wall of cylinder 1 is equipped with charge valve 16, and Withstand test device further includes being arranged on disconnecting switch conductor 17
Shielding part, shielding part include shielding part conductor for being connected with disconnecting switch conductor, for by shielding part conductor be fixed to every
From the shielding part fixing bolt 5 on switch conductor 17 and the shielding case being fixed on shielding part conductor.
Such as Fig. 3, through helicitic texture spinning in earth brace perforation, guide holder 11 has to be oriented to guide holder 11 for earth brace
The pilot hole installed；Earth brace includes fixed core part 8 and the removable shank portion 6 with 8 releasable connection of fixed core part；
Fixed core part 8 is installed in pilot hole, and the hole wall of pilot hole is equipped with the mounting hole installed for K-type sealing ring 10, fixed
Shank portion 8 and guide holder 11 are slidingly sealed cooperation.
The side wall backwards to cylinder 1 of end cap 2 is equipped with sealing cover 4, and sealing cover 4 is equipped with for accommodating fixed core part
8 holding tank, the interface for docking with end cap 2 of sealing cover 4 are equipped with the mounting groove installed for O-ring seal 15.
One end of 1 inside of close cylinder of fixed core part 8 is T shape end, and the left end of guide holder 11 is equipped with for T forming head
The deep gouge that path section is sunk to, the end face of T major diameter sections and 11 block of guide holder cooperate；8 left end of fixed core part, which is equipped with, to be supplied
Threaded hole, the right end of the removable connection of shank portion 6 are equipped with the jack inserted for slip joint 14, and slip joint 14 is inserted into jack
In, it is additionally provided in jack for providing the spring 12 of the elastic acting force towards 1 inside of cylinder to slip joint.
Slip joint 14 is equipped with axially extending along slip joint 14 and extends radially through slip joint along slip joint
Long hole 141 is equipped with backing pin 13 in long hole 141, and there are carry out axial direction for slide construction 14 between backing pin 13 and the hole wall of long hole 141
Mobile clearance space；Slip joint 14 is stretched out at the both ends of backing pin 13, and fixed core part 8 is equipped with inserts for what backing pin 13 was inserted into
Hole；The end face towards guide holder 11 of shielding part fixing bolt 5 is arc-shaped concave compatible with 14 head shape of slip joint.
Holding set 9 is arranged on fixed core part 8 on rear side of guide holder 11, set 9 is held tightly as side wall and is equipped with fracture
Set is disconnected, the front end face 91 for holding set 9 tightly is pre-small post-large tapered surface, and the rear end of guide holder 11 is equipped with and lock sleeve front end face phase
The cone tank of adaptation, 11 rear end of guide holder are installed with by helicitic texture for the lock sleeve 7 for holding 9 pressure of set tightly.
The front end face of lock sleeve 7 is equipped with for accommodating the holding tank for holding set 9 tightly, the cell wall of holding tank equipped with for
The screw thread that guide holder 11 connects, the cell wall vertical with 8 axis of fixed core part of holding tank and holding set 9 blocks cooperation.
When carrying out insulation against ground test to high-tension switch gear, shielding part is installed to disconnecting switch conductor 17 by such as Fig. 2
On, cylinder 1 is mounted on high-tension switch gear, end cap 2 is installed on cylinder 1, sealing cover 4 is installed on end cap 2, cylinder
Airtight chamber is formed between body 1 and high-tension switch gear；It adds high pressure in the other side of OB unit, high-tension switch gear can be carried out
Insulation against ground test.
When carrying out fracture Insulation Test to high-tension switch gear, such as Fig. 4 removes sealing cover 4, by removable shank portion
6 are installed on fixed core part 8 and form earth brace, cunning of the earth brace towards 1 medial movement of cylinder, on fixed core part 8
Dynamic connector 14 presses against on shielding part fixing bolt 5.When slip joint 14 is held out against in place, tighten lock sleeve 7, hold tightly set 9 by
It is held tightly after pressure with fixed core part 8, the position of fixed core part 8 is fixed；The fracture of high-tension switch gear can be carried out later
Insulation Test.
In other embodiments, earth brace locking structure can also be by the holding screw shape that is arranged on guide holder side wall
At.
In other embodiments, fixed core part can also be not provided with, earth brace passes through guide holder and high pressure when use
Switch port connection, forms between earth brace and guide holder and is slidingly sealed.
In other embodiments, long hole, backing pin can also be not provided in slip joint, by the both ends of spring respectively with fixation
Shank portion is fixedly connected with slip joint.
Claims (10)
1. Withstand test device used for high-voltage switch, including the cover for being docked with high-tension switch gear, it is characterised in that: described
The earth brace for connection to be connected with disconnecting switch conductor is actively equipped on cover, earth brace and cover are slidingly sealed cooperation,
Earth brace have with the disconnecting switch separation position free of conductors to carry out insulation against ground test, also have led with disconnecting switch conductor
Pass to the conducting position for carrying out fracture Insulation Test.
2. Withstand test device used for high-voltage switch according to claim 1, it is characterised in that: the cover is equipped with for connecing
The earth brace perforation of the thin end of the scroll activity setting, earth brace perforation are equipped with for axially carrying out locking positioning along earth brace to earth brace
Locking structure.
3. Withstand test device used for high-voltage switch according to claim 2, it is characterised in that: the locking structure includes supplying
The guide holder of earth brace guiding installation, the holding for holding earth brace tightly cover and are used to hold tightly the lock sleeve of cover locking, lead
To seat spinning in earth brace perforation, the side wall for holding set tightly is equipped with fracture, and the side towards guide holder for holding set tightly is the conical surface,
Guide holder is equipped with the cone slot for holding set press tightly compatible with the upper cone structure of set is held tightly, and lock sleeve spinning is in guide holder
It goes up and is used to provide the pressing force towards guide holder to holding set.
4. Withstand test device used for high-voltage switch according to claim 3, it is characterised in that: the guide holder for
The inner wall that earth brace is slidably matched is equipped with for realizing the K-type sealing ring for being slidingly sealed cooperation between earth brace and guide holder.
5. Withstand test device used for high-voltage switch according to claim 3, it is characterised in that: earth brace towards in cover
The end face of side one end is equipped with slot, and slip joint is equipped in slot and provides the spring of elastic force to slip joint, sliding connects
Head is equipped with the long hole axially extending along slip joint, is movably equipped with backing pin in long hole, the cell wall of the slot of earth brace is equipped with
For the jack of backing pin insertion.
6. Withstand test device used for high-voltage switch according to any one of claims 1 to 5, it is characterised in that: the ground connection
Bar includes the fixed core part being fixedly provided on cover and the removable shank portion with the releasable connection of fixed core part.
7. Withstand test device used for high-voltage switch according to claim 6, it is characterised in that: pressure test used for high-voltage switch
Device includes the end cover being arranged on the outside of cover, and end cover is equipped with the fixed core part for accommodating earth brace
Accommodating chamber.
8. Withstand test device used for high-voltage switch according to any one of claims 1 to 5, it is characterised in that: the cover
It is equipped with charge valve.
9. Withstand test device used for high-voltage switch according to any one of claims 1 to 5, it is characterised in that: high-voltage switch gear
With the shielding part that Withstand test device includes for being fixed on disconnecting switch conductor, shielding part includes shielding case, is arranged and is shielding
Cover keeping apart on cover for the shielding part conductor connected to be connected with disconnecting switch conductor and for shielding part conductor to be fixed to
Close the shielding part fixing bolt on conductor.
10. Withstand test device used for high-voltage switch according to claim 9, it is characterised in that: the fixed spiral shell of the shielding part
Bolt, which is equipped with, presses for earth brace and is formed the arc concave surface of positioning, earth brace by shielding part fixing bolt with keep apart
Close conductor connection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017104808567 | 2017-06-22 | ||
| CN201710480856 | 2017-06-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109116220A true CN109116220A (en) | 2019-01-01 |
| CN109116220B CN109116220B (en) | 2021-07-13 |
Family
ID=64822732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710651963.1A Active CN109116220B (en) | 2017-06-22 | 2017-08-02 | Withstand voltage test device for high-voltage switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109116220B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111190078A (en) * | 2019-12-20 | 2020-05-22 | 河南平高电气股份有限公司 | Detection tool and detection equipment for insulating pull rod |
| CN112968390A (en) * | 2021-01-13 | 2021-06-15 | 河南平高电气股份有限公司 | GIS equipment package module |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3126745A1 (en) * | 1981-07-02 | 1983-01-20 | Siemens AG, 1000 Berlin und 8000 München | THREE-POLE CABLE CONNECTION UNIT FOR A THREE-POLE METAL-ENCLOSED, COMPRESSED-GAS-INSULATED HIGH-VOLTAGE SWITCHGEAR |
| CN201084626Y (en) * | 2007-09-07 | 2008-07-09 | 西安电力机械制造公司 | An ultra-high pressure GIS-purpose isolation switch |
| CN101320648A (en) * | 2008-07-02 | 2008-12-10 | 中国西电电气股份有限公司 | Air insulated isolation switch device |
| CN101464489A (en) * | 2009-01-21 | 2009-06-24 | 中国第一冶金建设有限责任公司 | Industrial frequency inductance-regulation resonance pressure-resistant method |
| CN201886882U (en) * | 2010-11-25 | 2011-06-29 | 中国西电电气股份有限公司 | Outlet structure of SF6 insulation test transformer |
| CN102394194A (en) * | 2011-04-12 | 2012-03-28 | 江苏省如高高压电器有限公司 | Isolation switch conductor |
| CN204008976U (en) * | 2014-07-25 | 2014-12-10 | 山东泰开高压开关有限公司 | The pressure test frock of insulated tension pole for a kind of combined electrical apparatus |
| CN204045481U (en) * | 2014-05-20 | 2014-12-24 | 山东兴驰高压开关有限公司 | A kind of 110kV isolating switch |
| CN204246985U (en) * | 2014-11-12 | 2015-04-08 | 山东泰开高压开关有限公司 | For the filter of high-voltage combined electrical apparatus filling apparatus SF6 gas |
| CN205720536U (en) * | 2016-04-29 | 2016-11-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Alternating current filter breaker alternating current-direct current mixes pressure connection circuit |
-
2017
- 2017-08-02 CN CN201710651963.1A patent/CN109116220B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3126745A1 (en) * | 1981-07-02 | 1983-01-20 | Siemens AG, 1000 Berlin und 8000 München | THREE-POLE CABLE CONNECTION UNIT FOR A THREE-POLE METAL-ENCLOSED, COMPRESSED-GAS-INSULATED HIGH-VOLTAGE SWITCHGEAR |
| CN201084626Y (en) * | 2007-09-07 | 2008-07-09 | 西安电力机械制造公司 | An ultra-high pressure GIS-purpose isolation switch |
| CN101320648A (en) * | 2008-07-02 | 2008-12-10 | 中国西电电气股份有限公司 | Air insulated isolation switch device |
| CN101464489A (en) * | 2009-01-21 | 2009-06-24 | 中国第一冶金建设有限责任公司 | Industrial frequency inductance-regulation resonance pressure-resistant method |
| CN201886882U (en) * | 2010-11-25 | 2011-06-29 | 中国西电电气股份有限公司 | Outlet structure of SF6 insulation test transformer |
| CN102394194A (en) * | 2011-04-12 | 2012-03-28 | 江苏省如高高压电器有限公司 | Isolation switch conductor |
| CN204045481U (en) * | 2014-05-20 | 2014-12-24 | 山东兴驰高压开关有限公司 | A kind of 110kV isolating switch |
| CN204008976U (en) * | 2014-07-25 | 2014-12-10 | 山东泰开高压开关有限公司 | The pressure test frock of insulated tension pole for a kind of combined electrical apparatus |
| CN204246985U (en) * | 2014-11-12 | 2015-04-08 | 山东泰开高压开关有限公司 | For the filter of high-voltage combined electrical apparatus filling apparatus SF6 gas |
| CN205720536U (en) * | 2016-04-29 | 2016-11-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Alternating current filter breaker alternating current-direct current mixes pressure connection circuit |
Non-Patent Citations (3)
| Title |
|---|
| 叶子 等，: "浅谈隔离开关的应用", 《电子制作》 * |
| 李亚辉 等: "浅谈GIS现场交流耐压试验", 《企业技术开发》 * |
| 邱炜 等: "GIS设备现场交流耐压试验放电故障定位与分析", 《四川电力技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111190078A (en) * | 2019-12-20 | 2020-05-22 | 河南平高电气股份有限公司 | Detection tool and detection equipment for insulating pull rod |
| CN112968390A (en) * | 2021-01-13 | 2021-06-15 | 河南平高电气股份有限公司 | GIS equipment package module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109116220B (en) | 2021-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207074219U (en) | T-shaped connect-disconnect plug special isolation test connecting device | |
| CN109116220A (en) | Withstand test device used for high-voltage switch | |
| CN105375379A (en) | Gas insulation switch cabinet and plug-in wiring sleeve assembly thereof | |
| CN110165472A (en) | A kind of flame-proof mine cable connector | |
| CN205140672U (en) | Transformer high -tension bushing tap grounding device | |
| CN104535811B (en) | A kind of ammeter connecting element | |
| CN106340751B (en) | A kind of Waterproof cable joint | |
| CN203589642U (en) | High-voltage conductor dry-type insulating bush | |
| CN208508112U (en) | Fast socket, connector | |
| CN110048268A (en) | Close plug-in type power supply explosion-proof connector | |
| CN108963488A (en) | Connecting terminal with automatic peeling, locking function | |
| CN111550556B (en) | Sealing element for deep sea optical cable high-voltage test | |
| CN203337774U (en) | Test device for cable accessory of 220kV and above | |
| CN208520409U (en) | Cell Experimentation An tooling | |
| CN204536126U (en) | A kind of explosion-proof application cylinder hydraulic pressure test fixture | |
| CN201000965Y (en) | Fast locking separation coaxial connector | |
| CN207530507U (en) | End | |
| CN208272273U (en) | A kind of quickly explosion-proof charging gun | |
| CN203553419U (en) | Spring needle rectangular connector | |
| CN208508493U (en) | A kind of electrical equipment screen bottom of cabinet portion cable plugging device | |
| CN203326259U (en) | Earth-leakage-protection plug | |
| CN203627930U (en) | Switch valve of liquefied gas cylinder | |
| CN108199208A (en) | A kind of quick explosion-proof charging gun | |
| CN103166040B (en) | detachable waterproof plug | |
| CN205178095U (en) | Electric joint pincers |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |