CN206331073U - A kind of electric cable fitting interface flashover test device - Google Patents
A kind of electric cable fitting interface flashover test device Download PDFInfo
- Publication number
- CN206331073U CN206331073U CN201621116384.4U CN201621116384U CN206331073U CN 206331073 U CN206331073 U CN 206331073U CN 201621116384 U CN201621116384 U CN 201621116384U CN 206331073 U CN206331073 U CN 206331073U
- Authority
- CN
- China
- Prior art keywords
- interface
- test device
- electric cable
- cable fitting
- fitting interface
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of electric cable fitting interface flashover test device, including composite sample fixed structure, signal acquisition and measurement apparatus and high voltage power supply, composite sample fixed structure one end is sequentially connected with current-limiting resistance and high voltage power supply, the other end of composite sample fixed structure is connected with sampling resistor, and signal acquisition is connected with measurement apparatus with sampling resistor.The problem of complicated interface flashover experimental provision between cable insulation in the prior art and annex insulation and not easy operation control is solved, providing necessary equipment for influence of the factor to cable connector compound interface insulating properties such as the filths of roughness, the defect at interface and interface in research cable ageing process supports.
Description
Technical field
The utility model is related to power cable insulation detection technique field, and in particular to a kind of electric cable fitting interface is dodged
Network experimental rig.
Background technology
Electric wire is the key component of electric power transport, carries the important task of conveying electric energy.Cross-inked polyethylene power cable
By its excellent mechanically and electrically insulating properties and higher economic benefit, electric power cable is just increasingly widely applied to
In insulation.Compared with traditional paper oil insulation, Crosslinked polyethylene polymer insulating materials have low cost, be manufactured it is simple,
The advantages of mechanically and electrically dielectric strength is good, corrosion resistance is strong, service free and weight mitigate significantly, hence it is evident that better than oilpaper
Insulation.Crosslinked polyethylene played an important role in the safe operation of urban distribution network.
The annex of cross-inked polyethylene power cable, also known as cable connector are connection cables and electric line and its related
The element of power distribution equipment, refers generally to the middle connection and terminal connection of various cables in cable run, it is constituted together with cable
Power delivery networks.Cable accessory is mainly the characteristic according to the construction of cable, both can guarantee that the connection of the performance and terminal of cable,
The length of cable can be extended again.
A large amount of with cross-inked polyethylene power cable use, and cable accessory usage amount also accordingly increases, widely
Using on mesohigh distribution power cable.In cable operation fault, cable accessory failure account for about 63%, wherein because of medium
Interface flashover electric discharge reason causes annex failure to account for the 97% of sum.Statistics shows, because annex failure triggers fire and big
The accident that area has a power failure is of common occurrence, and the production and living to the people bring about great losses.
The annex of cable is multi-layer solid complex media insulation system, sees Fig. 1.Cable in the process of running, prefabrication type
Interface makes moisture due to the cell breath and electrophoretic effect of generation of expanding with heat and contract with cold between silicone rubber cable accessories and cable insulation
The very high dielectric constant globule is condensed at interface with migration moisture, interface creeping discharge is excited.Cable accessory until now according to
It is so the weakest link of cable system.According to ASSOCIATE STATISTICS, the practical experience of power cable operation shows cable insulation and connect
Interface between head insulation is easiest to puncture.
Focusing on insulator chain, oil-paper combination insulation single-candidate external insulation flashover the domestic and international research to flashover property at present more
Characteristic research, is seldom related to inside cable accessory, i.e., the solid-solid interface flashover property between the insulating materials of accessory internal is ground
Study carefully, less refer to roughness, the factor such as boundary defect, interface pollution level is to the compound boundary between the insulating materials of cable accessory
The influence of face flashover property, so also not detecting testing equipment accordingly.
Utility model content
The purpose of this utility model is to provide a kind of electric cable fitting interface flashover test device, solves prior art
Interface flashover experimental provision is complicated between the insulation of middle cable insulation and annex and the problem of not easy operation control, old for research cable
Influence of the factor such as filth of roughness, the defect at interface and interface to cable connector compound interface insulating properties during change
Supported there is provided necessary equipment.
The technical scheme that the utility model is used is, a kind of electric cable fitting interface flashover test device, including multiple
Close sample fixed structure, signal acquisition and measurement apparatus and high voltage power supply, composite sample fixed structure one end and current-limiting resistance and
High voltage power supply is sequentially connected, and the other end of composite sample fixed structure is connected with sampling resistor, signal acquisition and measurement apparatus with
Sampling resistor is connected.
The characteristics of the utility model, also resides in,
Signal acquisition includes capture card and the computer terminal of interconnection with measurement apparatus, and capture card connects with sampling resistor
Connect.
High voltage power supply is in parallel with a divider, i.e., the two ends of divider are connected with the two ends of high voltage power supply respectively, partial pressure
Device is also connected with capture card.
The structure of composite sample fixed structure, including two blocks of high-strength transparence glass for be arrangeding in parallel and be disposed therein
Composite sample, composite sample includes the transparent silicone rubber layer and cross-linked polyethylene layer for connecing mounted on top, the part that both are in contact
For interface, two electrodes are provided with interface.
Two electrodes are connected with sampling resistor and current-limiting resistance respectively.
Position between two electrodes is oppositely arranged, but between two electrodes not in contact with.
Two layers of high-strength transparence glass is fixed by several groups of insulated bolts and insulating nut up and down, can be insulated by adjusting
Bolt and insulating nut adjust and change the pressure between two glass plates.
One end of high voltage power supply is connected with current-limiting resistance, other end ground connection.
One end of sampling resistor is connected with electrode, other end ground connection.
The beneficial effects of the utility model are, between cable insulation and annex insulation due to Presence of an interface it is coarse,
The factor such as the defect at interface and the filth at interface causes the phenomenon of interfacial insulator hydraulic performance decline after voltage ageing, studies to obtain out-of-bounds
The influence of surface roughness, boundary defect and interface pollution level to flashover performance, and propose interface flashover during Presence of an interface defect
Starting and the rule and mechanism of development.Installation to improving existing accessory structure, instructing annex, has great importance and practical
Value.This experimental rig financial cost is low, simple in construction, easy to operate, highly reliable, practical, is easy to laboratory measurement
With promote the use of.
Brief description of the drawings
Fig. 1 is the structural representation of cable accessory part；
Fig. 2 is the integrated circuit structural representation of the utility model electric cable fitting interface flashover test device；
Fig. 3 is the structure of composite sample fixed structure in electric cable fitting interface flashover test device of the present utility model
Schematic diagram；
The Facad structure signal of sample fixed structure in the flashover test device of Fig. 4 the utility model electric cable fittings interface
Figure；
The voltage that Fig. 5 is obtained when being and being sampled using electric cable fitting interface flashover test device of the present utility model
Oscillogram.
In figure, 1. composite samples, 2. high-strength transparence glass, 3. electrodes, 4. interfaces, 5. insulating nuts, 6. insulated bolts,
7. high voltage power supply, 8. signal acquisitions and measurement apparatus, 8-1. sampling cards, 8-2. computer terminals, 9. sampling resistors, 10. current limlitings electricity
Resistance, 11. cross-linked polyethylene layers, 12. transparent silicone rubber layers, 13. divider, 14. composite sample fixed structures.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of electric cable fitting interface flashover test device of the utility model, as shown in Fig. 2 being fixed including composite sample
Structure 14, signal acquisition and measurement apparatus 8 and high voltage power supply 7, the one end of composite sample fixed structure 14 and current-limiting resistance 10 and height
Voltage source 7 is sequentially connected, and the other end of composite sample fixed structure 14 is connected with sampling resistor 9, harvester and sampling resistor
Connection.
Signal acquisition includes the capture card 8-1 and computer terminal 8-2 of interconnection with measurement apparatus 8, and capture card 8-1 is with adopting
Sample resistance 9 is connected, the voltage signal of the discharge current produced for gathering in sample.
High voltage power supply 7 is connected with a divider 13, and divider 13 is in parallel with power supply 7, i.e. the two ends of divider 13 point
Two ends not with high voltage power supply 7 are connected, its act on be to voltage with certain proportion carry out partial pressure, divider 13 also with capture card 8-
1 connection, collects the synchronizing signal of supply voltage,
Wherein, the structure of composite sample fixed structure 14 is as shown in figure 3, including the two pieces of high-strength transparence be arrangeding in parallel glass
Glass 2 and the composite sample 1 being disposed therein, composite sample 1 include the transparent silicone rubber layer 12 for connecing mounted on top and are crosslinked poly- second
Alkene layer 11, the part that both are in contact is interface 4, and two electrodes 3 are provided with interface 4, and two electrodes are electric with sampling respectively
Resistance 9 and current-limiting resistance 10 are connected,
Position between two electrodes 3 is oppositely arranged, but not in contact with the end of two electrodes 3 between two electrodes 3
Between have a certain distance, this distance is related to the electric-field intensity at interface, it is impossible to too small, it is too small if easily discharge, also not
Can it is excessive, it is excessive if then be difficult electric discharge.When typically with 100kV transformer, distance value is 5mm~20mm.
Two layers of high-strength transparence glass 2 is fixed by several groups of insulated bolts 6 and insulating nut 5 up and down, can pass through regulation
Insulated bolt 6 and insulating nut 5 adjust and change the pressure between two glass plates.
One end of high voltage power supply 7 is connected with current-limiting resistance 10, other end ground connection.
One end of sampling resistor 9 is connected with electrode 3, other end ground connection.
Signal acquisition is that discharge current signal when occurring flashover is acquired and measured with the effect of measurement apparatus 8,
And collection power synchronization signal is compared with discharge current signal simultaneously.
The course of work of the present utility model is that the interface between cross-linked polyethylene layer and transparent silicone rubber layer is insulation circle
Face, preset two electrodes 3 in interface two ends, one of electrode connects the high-pressure side of high voltage power supply, and another electrode 3 connects one
It is grounded after sampling resistor 9.
The capture card 8-1 being connected with sampling resistor, is acquired to the voltage on sampling resistor.
Sample preparation tests Interface Construction, i.e. composite sample by crosslinked polyethylene section and transparent silicone rubber piece pressing group
Into as shown in Figure 4 and Figure 5.Composite sample is positioned between two pieces of transparent organic glass brassboards, and the pressure at interface is by being fixed on
Nut on two pieces of transparent organic glass applies.Adjusting nut is equal length, you can so that being applied to the pressure on interface every time
Power or pressure it is in the same size.Stand for experiment all uses high-strength insulating material, to ensure to insulate each other, so as to cable
Electric Field Distribution in accessory interface does not influence.Because glass and silicon rubber all use clear sheet, so the electric discharge on interface
Light can be transmitted.
The selection of experiment material：Using crosslinked polyethylene thin slice, the cross-linked polyethylene layer in device is used as.Silicon rubber thin slice
As the transparent silicone rubber layer in experimental provision, the dimensions of two sample materials is as crosslinked polyethylene slice.
First, two kinds of samples are surface-treated, specimen surface is cleaned with alcohol, 24 are at least dried at a temperature of 20 DEG C
Hour.
Experiment is carried out in shielding castle, and to prevent that corona discharge from occurring in high-voltage connection, the shielding line of high-voltage connection is adopted
With a diameter ofAluminum pipe.
Specifically test procedure is：
1st, main circuit and measuring loop are put up, sample is lain in a horizontal plane on poly (methyl methacrylate) plate, errorless rear connection is checked
Power supply.
2nd, pre- making alive, in the case where not placing tested sample, is connected after test circuit, progressively regulation rise experiment
In computer terminal software interface in voltage, signal acquisition and measurement apparatus 8, once there is discharge pulse, record experiment in display
The minimum discharge voltage of voltage, as high-tension line, is also maximum allowable test voltage Utmax；
3rd, firing potential is measured：Place after tested sample, uniform slow rise test voltage, signal acquisition and survey
In the display interface for measuring the computer terminal in device 8, once discharge pulse occurs in display, test voltage is recorded, as discharge mould
Type firing potential Ui.
4th, discharge current signal measurement：When Utmax is more than the experimental voltage Ut of design, under design experiment voltage Ut
Measure local discharge signal；Data collecting card is started working, and is sampled, and putting for 50 power frequency period (1s durations) is gathered every time
Electric sample.
5th, voltage is raised with the 2v rate of rise again, until flashover occurs for interface.Electric discharge phenomena are observed until flashover, record
Firing potential, flashover voltage.We define insulator interface flashover generation situation be：Work as interface breakdown, equivalent to terminal
It is connected between high-field electrode and ground, now transformer instrument board, by applied magnitude of voltage, reduction is designated as 0 suddenly for display, and
Keep stable.
6th, sample is taken pictures.
7th, under the conditions of same parameters, repeat step 2~6 each 5 times, check data reasonability after, change Parameter Conditions after
Continuous experiment.
After being tested according to above-mentioned test method, the waveform that can be collected is as shown in figure 5, for as electrode spacing d=
14mm, during applied voltage 9500kV, the synchronizing voltage waveform of compound interface electric discharge sampled voltage waveform and power supply.Ripple in Fig. 5
Shape is the waveform obtained after 5 periodic samplings, it can be seen that electric cable fitting interface of the present utility model flashover is tried
Experiment device can be used to carry out creeping discharge simulated experiment.
It is synchronous that the experimental rig of electric cable fitting interface of the present utility model flashover, wherein measurement apparatus carry out multi-parameter
The purpose of measurement is just desirable to carry out the comprehensive process for comprehensively understanding interface electric discharge from multiple sides, when discharge current sampling is used
Sampling resistor be R.After the generation of interface flashover, short circuit current maxima reaches the pressure on I, thus current sampling resistor
Drop is U to the maximum, then in theory within safe range.The voltage on sampling resistor is sampled using capture card, letter is utilized
Number collection and measurement apparatus 8 in computer terminal to supply voltage Simultaneous Monitoring.Circuit starts sampling, boosting side after connecting
Formula is continuous voltage rise, and the rate of rise is that up to interface, electric discharge sends pulse signal and records this magnitude of voltage for v holdings boosting, that is, is originated
Discharge voltage.Then, it is further continued for raising voltage, improves the 10% of firing potential size.So that interface accelerates discharge breakdown,
When analyzing discharge current waveform, the magnitude of voltage divided by R collected, discharge current value is reduced to.
Composite sample fixed structure 1 in this experimental rig, froms the perspective of from structure and principle, in two kinds of materials of XLPE and silicon rubber
Certain length insulator interface is formd on the interface of material, pre-buried two electrode in composite sample interface two ends constitutes electrode system, one
Individual electrode connects the high-pressure side of high voltage power supply, another electrode ground connection.Apply after additional power source, will form uniform between two electrodes
Electric field.Because the spacing very little of two electrodes is d, and it is r that two plates, which have larger radius of curvature, therefore can be approximately considered electricity
Pole with the Electric Field Distribution in interelectrode insulator interface be it is uniform, so can dummycable joint interface subrange cut
To electric field.
When the utility model is tested, the electric field perpendicular to interface is not simulated, is due to actual cable connector circle
Face is very long, and the vertical interface electric field in regional area can be distributed with approaches uniformity.It is to reduce thickness of electrode to interface in addition
Influence, has made the electrode system of very thin thickness.Electrode used therein material is aluminium foil, and front end is cut into semicircle electricity of the radius for r
Pole is clipped between sample interface and fixed, and rear end is cut into rectangle and connects voltage source or ground connection by wire.Thus reduce on electrode
Internal field concentrates caused by raised.In this experiment it should be particularly noted that the placement of electrode, because aluminium foil is very thin, when mounted
It is easily damaged.Interelectrode electric field is relevant with electrode front end bending radius, and Electric Field Distribution is more uniform when bending radius is big, bending
Radius hour non-uniform electric enhancing.
Claims (9)
1. a kind of electric cable fitting interface flashover test device, it is characterised in that including composite sample fixed structure (14), letter
Number collection and measurement apparatus (8) and high voltage power supply (7), described composite sample fixed structure (14) one end and current-limiting resistance (10)
And high voltage power supply (7) is sequentially connected, the other end of described composite sample fixed structure (14) is connected with sampling resistor (9), institute
The signal acquisition stated is connected with measurement apparatus (8) with sampling resistor (9).
2. electric cable fitting interface flashover test device according to claim 1, it is characterised in that described signal is adopted
Collection includes the capture card (8-1) and computer terminal (8-2) of interconnection with measurement apparatus (8), and described capture card (8-1) is with adopting
Sample resistance (9) is connected.
3. electric cable fitting interface flashover test device according to claim 1, it is characterised in that described high-tension electricity
Source (7) is connected with a divider (13), and described divider (13) is in parallel with power supply (7), i.e. the two ends of divider (13)
The two ends with high voltage power supply (7) are connected respectively, and described divider (13) is also connected with capture card (8-1).
4. electric cable fitting interface flashover test device according to claim 1, it is characterised in that described compound examination
The structure of sample fixed structure (14), including two blocks of high-strength transparence glass (2) be arrangeding in parallel and the compound examination being disposed therein
Sample, described composite sample includes the transparent silicone rubber layer (12) and cross-linked polyethylene layer (11) for connecing mounted on top, and both connect
Tactile part is interface (4), and described interface (4) place is provided with two electrodes (3).
5. electric cable fitting interface flashover test device according to claim 4, it is characterised in that two described electricity
Pole (3) is connected with sampling resistor (9) and current-limiting resistance (10) respectively.
6. electric cable fitting interface flashover test device according to claim 4, it is characterised in that two described electricity
Position between pole (3) is oppositely arranged, but between two electrodes (3) not in contact with.
7. electric cable fitting interface flashover test device according to claim 4, it is characterised in that described up and down two
Floor height intensity clear glass (2) is fixed by several groups of insulated bolts (6) and insulating nut (5), can be by adjusting insulated bolt
(6) adjust with insulating nut (5) and change the pressure between two glass plates.
8. electric cable fitting interface flashover test device according to claim 1, it is characterised in that described high-tension electricity
The one end in source (7) is connected with current-limiting resistance (10), other end ground connection.
9. electric cable fitting interface flashover test device according to claim 1, it is characterised in that described sampling electricity
One end of resistance (9) is connected with electrode (3), other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621116384.4U CN206331073U (en) | 2016-10-12 | 2016-10-12 | A kind of electric cable fitting interface flashover test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621116384.4U CN206331073U (en) | 2016-10-12 | 2016-10-12 | A kind of electric cable fitting interface flashover test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206331073U true CN206331073U (en) | 2017-07-14 |
Family
ID=59286734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621116384.4U Active CN206331073U (en) | 2016-10-12 | 2016-10-12 | A kind of electric cable fitting interface flashover test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206331073U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478972A (en) * | 2017-09-22 | 2017-12-15 | 南方电网科学研究院有限责任公司 | The test device and method of cable accessory |
| CN108710069A (en) * | 2018-07-04 | 2018-10-26 | 南方电网科学研究院有限责任公司 | A kind of rubber accessory local discharge detection device |
| CN108879496A (en) * | 2018-06-26 | 2018-11-23 | 广西电网有限责任公司电力科学研究院 | A method of improving cable accessory interface breakdown intensity |
| CN108957263A (en) * | 2018-08-24 | 2018-12-07 | 国网浙江省电力有限公司电力科学研究院 | The more stress coupling simulation test devices of XLPE cable accessory interface and method |
| CN109031068A (en) * | 2018-08-13 | 2018-12-18 | 清华大学深圳研究生院 | A kind of Hi-pot test device and method at compound inslation interface |
| CN109188225A (en) * | 2018-10-10 | 2019-01-11 | 中国电力科学研究院有限公司 | A kind of cable connector compound interface breakdown voltage detection device |
| CN110220808A (en) * | 2019-07-15 | 2019-09-10 | 四川大学 | A kind of anti-explosion box for cable middle connector explosion-proof performance detection method and device based on interface arc burning |
| CN110221185A (en) * | 2019-05-20 | 2019-09-10 | 广东电网有限责任公司 | A kind of simulated high-pressure cable intermediate joint interface creeping discharge experimental rig |
| CN111856223A (en) * | 2020-06-23 | 2020-10-30 | 深圳供电局有限公司 | Composite interface partial discharge simulation system and composite interface partial discharge simulation method |
| CN111856222A (en) * | 2020-06-23 | 2020-10-30 | 深圳供电局有限公司 | Partial discharge simulation device, mounting method thereof and partial discharge simulation equipment |
| CN112198340A (en) * | 2020-09-29 | 2021-01-08 | 山东电力研究院 | Insulating base for testing flashover characteristic of coating, preparation method and application |
| CN113625053A (en) * | 2021-07-07 | 2021-11-09 | 广东电网有限责任公司广州供电局 | Cable, cable insulation interface resistance measuring circuit, method and device |
| CN113740676A (en) * | 2021-07-27 | 2021-12-03 | 中国电力科学研究院有限公司 | Cable joint double-layer medium interface flashover voltage test device |
| CN114200259A (en) * | 2021-11-23 | 2022-03-18 | 国网北京市电力公司 | High-voltage cable joint composite interface insulation characteristic detection device |
-
2016
- 2016-10-12 CN CN201621116384.4U patent/CN206331073U/en active Active
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478972A (en) * | 2017-09-22 | 2017-12-15 | 南方电网科学研究院有限责任公司 | The test device and method of cable accessory |
| CN107478972B (en) * | 2017-09-22 | 2023-05-16 | 南方电网科学研究院有限责任公司 | Testing device and method for cable accessories |
| CN108879496A (en) * | 2018-06-26 | 2018-11-23 | 广西电网有限责任公司电力科学研究院 | A method of improving cable accessory interface breakdown intensity |
| CN108710069A (en) * | 2018-07-04 | 2018-10-26 | 南方电网科学研究院有限责任公司 | A kind of rubber accessory local discharge detection device |
| CN109031068A (en) * | 2018-08-13 | 2018-12-18 | 清华大学深圳研究生院 | A kind of Hi-pot test device and method at compound inslation interface |
| CN108957263B (en) * | 2018-08-24 | 2020-06-09 | 国网浙江省电力有限公司电力科学研究院 | XLPE cable accessory interface multi-stress coupling simulation test device and method |
| CN108957263A (en) * | 2018-08-24 | 2018-12-07 | 国网浙江省电力有限公司电力科学研究院 | The more stress coupling simulation test devices of XLPE cable accessory interface and method |
| CN109188225A (en) * | 2018-10-10 | 2019-01-11 | 中国电力科学研究院有限公司 | A kind of cable connector compound interface breakdown voltage detection device |
| CN110221185A (en) * | 2019-05-20 | 2019-09-10 | 广东电网有限责任公司 | A kind of simulated high-pressure cable intermediate joint interface creeping discharge experimental rig |
| CN110220808A (en) * | 2019-07-15 | 2019-09-10 | 四川大学 | A kind of anti-explosion box for cable middle connector explosion-proof performance detection method and device based on interface arc burning |
| CN111856223A (en) * | 2020-06-23 | 2020-10-30 | 深圳供电局有限公司 | Composite interface partial discharge simulation system and composite interface partial discharge simulation method |
| CN111856222A (en) * | 2020-06-23 | 2020-10-30 | 深圳供电局有限公司 | Partial discharge simulation device, mounting method thereof and partial discharge simulation equipment |
| CN111856222B (en) * | 2020-06-23 | 2023-09-15 | 深圳供电局有限公司 | Partial discharge simulation device, installation method thereof and partial discharge simulation equipment |
| CN112198340A (en) * | 2020-09-29 | 2021-01-08 | 山东电力研究院 | Insulating base for testing flashover characteristic of coating, preparation method and application |
| CN113625053A (en) * | 2021-07-07 | 2021-11-09 | 广东电网有限责任公司广州供电局 | Cable, cable insulation interface resistance measuring circuit, method and device |
| CN113740676A (en) * | 2021-07-27 | 2021-12-03 | 中国电力科学研究院有限公司 | Cable joint double-layer medium interface flashover voltage test device |
| CN114200259A (en) * | 2021-11-23 | 2022-03-18 | 国网北京市电力公司 | High-voltage cable joint composite interface insulation characteristic detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206331073U (en) | A kind of electric cable fitting interface flashover test device | |
| CN101464235B (en) | Test method and apparatus for polymer power cable insulation accelerated electric tree aging | |
| CN103048381B (en) | Testing device and testing method for lighting-proof damage property of fiber composite material | |
| CN103018645B (en) | Device and method for testing artificial lightning injuries of carbon fiber composite material | |
| CN102944777A (en) | Method for detecting service life of cable | |
| CN107991584A (en) | A kind of transformer capacitor formula casing insulation ag(e)ing test method based on polarization/depolarization current | |
| CN102830309A (en) | Testing method for aging factor of 110 kV cross-linked cable | |
| CN106053955B (en) | A kind of low frequency sinusoidal motivates the test method of lower Oil-Paper Insulation relative dielectric constant | |
| CN102621457A (en) | On-line detection method of metal oxide arrester insulating property influencing factor | |
| CN103760448A (en) | Comprehensive live test method of insulation defects of metal oxide arrester for electric power | |
| CN103063991A (en) | Oil-immersed transformer insulation paper polymerization degree test method based on return voltage | |
| CN213240383U (en) | Partial discharge measuring device for electric branch test | |
| CN102193040A (en) | Method for performing insulation preventive test on zinc oxide lightning arrester without dismantling lead wire | |
| CN106646042A (en) | Comprehensive evaluation method for aging performances of insulating separator plate of switch cabinet | |
| CN102495342A (en) | Device for detecting hydrophobicity of composite insulator of power transmission line and control method for device | |
| CN105092380A (en) | Device for testing comprehensive performance of round wire concentric lay overhead electrical stranded conductor | |
| CN202141752U (en) | Online monitoring device for metal zinc oxide lightning arrester | |
| CN210775723U (en) | Simulation test device for heating characteristics of zero-value insulator string | |
| CN112881785B (en) | Cable buffer layer repairing effect evaluation method based on capacitance current analysis | |
| CN103792262A (en) | Power transformer damp detection method based on frequency domain Havriliak-Negami model | |
| CN203037807U (en) | Testing device used for anti-artificial lightning stroke damage performance of carbon-fiber composite | |
| Glass et al. | Inter-digital capacitive sensor for evaluating cable jacket and insulation aging | |
| WO2021012639A1 (en) | Insulation diagnosis and positioning method for insulated tube-type bus bar | |
| CN205139307U (en) | 500kV high pressure parallel reactor interturn insulation capability test device | |
| CN203929986U (en) | Measure the test unit of the corona starting characteristic of the super corona of fine rule |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |