CN103175998B - A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance - Google Patents

A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance Download PDF

Info

Publication number
CN103175998B
CN103175998B CN201310038489.7A CN201310038489A CN103175998B CN 103175998 B CN103175998 B CN 103175998B CN 201310038489 A CN201310038489 A CN 201310038489A CN 103175998 B CN103175998 B CN 103175998B
Authority
CN
China
Prior art keywords
arm
test
mobile
insulator
insulator chain
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
Application number
CN201310038489.7A
Other languages
Chinese (zh)
Other versions
CN103175998A (en
Inventor
王磊
苏杰
谷山强
黄然
赵淳
申元
李涛
马御棠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TECHNOLOGY BRANCH YUNNAN GRID CO Ltd
YUNNAN ELECTRIC POWER EXPERIMENTAL RESEARCH INSTITUTE (GROUP) CO LTD ELECTRIC POWER RESEARCH INSTITUTE
Wuhan NARI Ltd
Original Assignee
TECHNOLOGY BRANCH YUNNAN GRID CO Ltd
YUNNAN ELECTRIC POWER EXPERIMENTAL RESEARCH INSTITUTE (GROUP) CO LTD ELECTRIC POWER RESEARCH INSTITUTE
Wuhan NARI Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TECHNOLOGY BRANCH YUNNAN GRID CO Ltd, YUNNAN ELECTRIC POWER EXPERIMENTAL RESEARCH INSTITUTE (GROUP) CO LTD ELECTRIC POWER RESEARCH INSTITUTE, Wuhan NARI Ltd filed Critical TECHNOLOGY BRANCH YUNNAN GRID CO Ltd
Priority to CN201310038489.7A priority Critical patent/CN103175998B/en
Publication of CN103175998A publication Critical patent/CN103175998A/en
Application granted granted Critical
Publication of CN103175998B publication Critical patent/CN103175998B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance, test tower body adopts framed structure, two pillars (3) bottom adopts pre-embedded anchoring bolts (1) to fix with the basis (2) of concreting, the synchronous electric block (8) that cross-arm (5) central authorities arrange two band auto-lock functions is fixed on pillar (3) top, be connected with mobile cross-arm (6) two ends of wire rope (10) with fixing cross-arm (5) below respectively by the fixed block (12) of two pillars (3) inner side near top, the fixed guide (4) that mobile cross-arm (6) is arranged with two pillars (3) inner side forms guideway (7).The present invention is easy to assembly, can be used for the detection of single insulator string high-voltage performance, also can be used for detecting influencing each other of electric property between heterogeneous insulator.

Description

A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance
Technical field
The present invention relates to electric system field of high-voltage electrical equipment, particularly relate to the transmission facility such as transmission line hardware, insulator chain high-voltage performance detection experiment apparatus structure field.
Background technology
Ultra-high-tension power transmission line is the important component part of electric system, and the safe and stable operation of transmission line of electricity directly determines the security and stability of electric system and the reliability of power supply.The runnability of the transmission facility such as insulator chain, line hardware and the proterctive equipment such as lightning arrester, mutual inductor and secondary device and anti-external interference performance are the bases ensureing transmission line of electricity safe and stable operation; particularly insulator chain carries line-to-ground and to the insulation between other objects, is the most basic equipment of transmission line of electricity.Different structure size, different materials and to be positioned at its insulating property of insulator chain that varying environment runs different, insulating property after insulator chain coordinates other gold utensils of circuit also can change, in order to ensure the actual motion performance after insulator chain linked network and anti-external interference performance, usually need to coordinate the power-frequency withstand voltage after other gold utensils and Power Flashover Voltage (for alternating current circuit insulator chain) to insulator chain or insulator chain, Th withstand voltage and DC flashover (for DC line insulator chain) and lightning impulse superpotential, the characteristics such as switching impulse superpotential carry out the test of a series of high-voltage electrical apparatus Performance Detection.
Usual above-mentioned electric property detection experiment carries out on true type tower, but true type tower construction cost is high, long construction period, bulky heaviness, occupation of land is many, and once build up a kind of tower, not easily repacking is built into other towers, thus the electric property detection experiment that insulator chain or insulator chain coordinate other gold utensils under different distribution form can not be carried out, shaft tower utilization factor is not high; On the other hand, when true type tower carries out above-mentioned test, hang, change and regulate test product insulator chain to need work high above the ground, not only increase the risk of operating personnel, and be not easy to operation, waste time and energy, required cooperation personnel increase, inefficiency.Therefore be necessary to propose a kind of portable test shaft tower that effectively can solve the above-mentioned inherent defect when true type tower carries out electric property detection.
Summary of the invention
Technical matters to be solved by this invention is: solve line insulator string or insulator chain and coordinate the equipment such as other gold utensils carrying out the true type tower of various high-voltage electrical apparatus Performance Detection test needs, and the true type tower construction cycle is long, cost is high, be not easy to during test hang, change and regulate test product insulator chain, need to carry out work high above the ground, the problems such as efficiency is low, have a big risk.
The invention provides a kind of insulator chain or insulator chain of can be used in coordinates the equipment such as other gold utensils to carry out the portable shaft tower of above-mentioned high-voltage electrical apparatus Performance Detection test, this test shaft tower is easy to assembly, the construction cycle is short, cost is low, take up an area few, small and exquisite practicality, utilize this test shaft tower, avoid in suspension, replacing and work high above the ground when regulating test product insulator chain, and the high-voltage electrical apparatus Performance Detection test that insulator chain or insulator chain coordinate other gold utensils under different distribution form can be carried out, substantially increase shaft tower utilization factor, decrease operation number simultaneously, improve work efficiency.
The technical solution adopted in the present invention is:
A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance, the present invention is characterised in that, test tower body adopts framed structure, the fixing cross-arm on two pillars and its top is fixed by joint flange, two pillar bottoms adopt the basis of pre-embedded anchoring bolts and concreting to fix, the synchronous electric block that cross-arm central authorities arrange two band auto-lock functions is fixed on pillar top, be connected with the mobile cross-arm two ends below fixing cross-arm with wire rope respectively by the fixed block of two post inboard near top, the fixed guide that mobile cross-arm and two post inboard are arranged forms guideway.
Mobile cross-arm freely up and down can slide along fixed guide in vertical plane, drives the test product insulator chain be connected with mobile cross-arm to move up and down, thus lifting test product insulator chain, regulate test product insulator chain to ground level.
The central synchronous electric block with auto-lock function of cross-arm is fixed on pillar top of the present invention can ensure that the mobile cross-arm below fixing cross-arm is elevated stably along fixed guide, when mobile cross-arm is elevated to specified altitude assignment, electric block cuts off self-lock, and mobile cross-arm and test product insulator chain are fixed in certain terrain clearance.
Electric block wire rope of the present invention is connected by electrical isolation insulator with mobile cross-arm, to ensure that when carrying out high-potting between electric block (8) and high voltage electrical isolation reliably.
The connecting link that the present invention hangs test product insulator chain can remove and install flexibly on mobile cross-arm, for regulating the electric clearance between the layout of test product insulator chain and test product insulator chain or between test product insulator chain and pillar.
A circular hole extraction wire rope is respectively dug out, to protect electric block in the both sides that the present invention fixes electric block protective cover above cross-arm.
The basic step of the present invention when carrying out the test of high-voltage electrical apparatus Performance Detection is as follows:
(1) the synchronous electric block of straighforward operation, makes mobile cross-arm steadily decline along fixed guide, until be convenient to artificial terrain clearance position power-off of installing test product insulator chain on ground on mobile cross-arm, electric block self-locking, mobile cross-arm is fixed;
(2) according to content of the test and testing program, according to test product insulator chain layout pattern and various electric clearance, determine the position of mobile cross-arm upper connecting rod and length and carry out fixing, having hung test product insulator chain, connected high-voltage connection and ground wire etc.;
(3) the synchronous electric block of straighforward operation, makes mobile cross-arm steadily rise along fixed guide, until the test product insulator chain terrain clearance position power-off of testing requirements, and electric block self-locking, mobile cross-arm and test product insulator chain are fixed;
(4) test of high-voltage electrical apparatus Performance Detection is carried out according to test arrangement;
(5) after this has been tested, the synchronous electric block of straighforward operation again, makes mobile cross-arm steadily decline along fixed guide, until be convenient to manually in replaced on ground or the terrain clearance position power-off regulating test product insulator chain, electric block self-locking, mobile cross-arm is fixed;
(6) according to content of the test and testing program, at replaced on ground or adjustment test product insulator chain, step (2), (3), (4), (5) are repeated until test all completes;
(7) after test all completes, the synchronous electric block of straighforward operation, makes mobile cross-arm steadily decline along fixed guide, until be convenient to the terrain clearance position power-off of manually removing test product insulator chain on ground, electric block self-locking, mobile cross-arm is fixed;
(8) remove test product insulator chain, the synchronous electric block of straighforward operation, makes mobile cross-arm drop to ground, wire rope is not stressed.
Advantage of the present invention is: novel structure, be skillfully constructed, be convenient to implement, cost is low, risk is little, efficiency is high.Specifically have the following advantages:
(1) the synchronous electric block of straighforward operation controls mobile cross-arm on fixed guide, does freely up and down slip in vertical plane, and then control the different terrain clearance of test product insulator chain, avoid work high above the ground, reduce operating risk, improve work efficiency simultaneously.Usually repeatedly need hang, change and regulate test product insulator chain when carrying out the test of high-voltage electrical apparatus Performance Detection, high-altitude operation vehicle is needed to coordinate when true type tower operates, operating personnel is many, there is the risk of operating personnel from falling from high altitude during the low and work high above the ground of work efficiency.This portable test shaft tower only needs the synchronous electric block of straighforward operation that mobile cross-arm is dropped to be convenient to manually-operated height to carry out hanging, change and regulate during test product insulator chain, without the need to work high above the ground, avoid work high above the ground risk, and the operating personnel needed is few, improves work efficiency simultaneously.
(2) construction cost is low, short construction period.The space truss structure that general electric property detection experiment to connect through bolt with true type tower many employings shaped steel or welds, complicated construction technique, steel heaviness transport inconvenience, and needed for true type tower, steel are more, cost is high, and the construction period of steel tower is also long.This portable test shaft tower adopts framed structure, sectional form, first manufacturer to produce needed for test tower the respectively section of assembling, mounting flange and guide rail, web member etc. in workshop according to design drawing, the preparation of the concrete pouring construction of band pre-embedded anchoring bolts that meanwhile can carry out footing of a pillar and the synchronous electric block with auto-lock function.Namely can by ring flange, test tower be assembled at the scene after above-mentioned preliminary work completes, construction technology is simple, and the main body of test tower is the shaft tower section be made up of high-strength hard aluminum alloy, lightly be convenient to transport, under the prerequisite that identical test requires, required tower material is few compared with steel tower, reduce cost, also shorten the construction period simultaneously.
(3) on mobile cross-arm for connecting the connecting link easy accessibility of test product insulator chain, electric clearance between the layout of adjustable test product insulator chain and test product or between test product and pillar, therefore can meet the requirement of all kinds of high-voltage electrical apparatus Performance Detection test to different gap distance.
Accompanying drawing explanation
Fig. 1 is the portable check bar tower structure schematic diagram that the present invention detects for transmission line of electricity three-phase insulator strings high-voltage performance;
Fig. 2 is that the present invention coordinates the high-voltage performance detection figure of arcing horn for transmission line of electricity three-phase insulator strings.
In figure: 1, foot bolt; 2, footing of a pillar; 3, duralumin, hard alumin ium alloy sectional pillar; 4, cast iron fixed guide; 5, duralumin, hard alumin ium alloy sectional fixes cross-arm; 6, duralumin, hard alumin ium alloy sectional moves cross-arm; 7, guideway contact portion close-up top view; 8, there is the synchronous electric block of auto-lock function; 9, electric block protective cover; 10, electric block wire rope; 11, electric block electrical isolation insulator; 12, fixed pulley; 13, joint flange; 14, connecting link; 15, test product insulator chain; 16, arcing horn upper/lower electrode; 17, analog conducting wire.
Embodiment
Below, by reference to the accompanying drawings the specific embodiment of the present invention is further described.
A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance, the present invention is characterised in that, test tower body adopts framed structure, two pillars 3 are fixed by joint flange 13 with the fixing cross-arm 5 on its top, two pillar 3 bottoms adopt pre-embedded anchoring bolts 1 to fix with the basis 2 of concreting, the synchronous electric block 8 that cross-arm 5 central authorities arrange two band auto-lock functions is fixed on pillar 3 top, be connected with mobile cross-arm 6 two ends below fixing cross-arm 5 with wire rope 10 respectively by the fixed block 12 near top inside two pillars 3, the fixed guide 4 arranged inside mobile cross-arm 6 and two pillars 3 forms guideway 7.
Mobile cross-arm 6 freely up and down can slide along fixed guide 4 in vertical plane, drives the test product insulator chain 15 be connected with mobile cross-arm 6 to move up and down, thus lifting test product insulator chain 15, regulate test product insulator chain 15 pairs of ground levels.
The synchronous electric block 8 that cross-arm 5 central authorities have an auto-lock function is fixed on pillar 3 top of the present invention can ensure that the mobile cross-arm 6 below fixing cross-arm 5 is elevated stably along fixed guide 4, when mobile cross-arm 6 is elevated to specified altitude assignment, electric block 8 cuts off self-lock, and mobile cross-arm 6 is fixed in certain terrain clearance with test product insulator chain 15.
Electric block wire rope 10 of the present invention is connected by electrical isolation insulator 11 with mobile cross-arm 6, to ensure that when carrying out high-potting between electric block 8 and high voltage electrical isolation reliably.
The connecting link 14 that the present invention hangs test product insulator chain 15 can remove and install flexibly on mobile cross-arm 6, for regulating the electric clearance between the layout of test product insulator chain 15 and test product insulator chain 15 or between test product insulator chain 15 and pillar 3.
A circular hole extraction wire rope 10 is respectively dug out, to protect electric block in the both sides that the present invention fixes electric block protective cover 9 above cross-arm 5.
As shown in Figure 1 and Figure 2, the present invention is made up of basis, pillar, fixing cross-arm, mobile cross-arm, guideway and synchronous electric block six major part with auto-lock function on the whole, its B-C post, fixing cross-arm, mobile cross-arm adopt duralumin, hard alumin ium alloy to divide standard paragraphs processing and fabricating by manufacturer in workshop, comprise the joint flange of connection, connecting link and foot bolt, various attachment screws etc.This test tower guideway used wherein fixed guide (vertically placing guide rail) adopts harder antifriction cast iron processing, dynamic guide rail (horizontal positioned guide rail) is made up of mobile cross-arm and duralumin, hard alumin ium alloy guide rail head two parts, guide rail head surface spraying one deck wear-resistant coating, guide rail head is reliably connected the dynamic guide rail of common composition with mobile cross-arm by two-way flange.
After above-mentioned preliminary work completes, transport the establishment construction that scene can start to test shaft tower to by testing whole parts needed for shaft tower, test shaft tower sets up the basic step of constructing to be had:
(1) on ground, each shaft tower section is assembled into pillar, fixing cross-arm and mobile crosspiece;
(2) by ring flange, pillar and fixing cross-arm are coupled together, at the configuration of fixing cross-arm central authorities, the good synchronous electric block of debugging, install fixed guide at two post inboard simultaneously;
(3) the check bar tower crane utilizing crane to be assembled on ground to the position, concrete pillar basis of building, and keeps test shaft tower vertical with basis;
(4) two pillar column foots are fixed in the pre-embedded anchoring bolts in concrete foundation and (if having particular/special requirement to the stability of shaft tower herein, then can also draw four bracing wires on two pillar tops respectively, be fixed on the ground);
(5) guide rail head and mobile cross-arm are coupled together by ring flange, utilize crane mobile cross-arm to be transported to the shaft tower column foot position fixed;
(6) synchronous electric block is connected with the two ends of mobile crosspiece respectively by electrical isolation insulator wire rope, the guide rail head at mobile cross-arm two ends is alignd with fixed guide;
(7) mobile cross-arm is sling along fixed guide by the synchronous electric block of straighforward operation, and so far portable test shaft tower establishment construction completes.
As an embodiment, the test utilizing the present invention to invent coordinates the lightning impulse U of arcing horn to 220kV composite insulator string with portable shaft tower 50%flash-over characteristic is tested, and as shown in Figure 2, wherein test product is made up of composite insulator string, arcing horn and analog conducting wire.Because the Lightning Characteristic under different insulative substring length, different arcing horn size is different, therefore test needs frequent replacing test product insulator chain and arcing horn.
According to correlation test code, lightning impulse U 50%flash-over characteristic is obtained by lifting and lowering method, test procedure mainly: first choose be about expection U 50%10% as the differential Δ U of voltage, choose a voltage close to 50% flashover voltage as starting potential and pressurize, if there is not flashover, then voltage increases Δ U, otherwise then during test next time, voltage reduces Δ U; Then first effective starting voltage value is determined, it is test first " effectively " that first test different from the effect that front single test produces is elected to be, only have this time test and at least 9 tests subsequently just as effective test, and determine 50% flashover voltage with them, 50% flashover voltage uses following formula to calculate.
U 50 % = Σ ( n i × U i ) n
220kV composite insulator string coordinates the lightning impulse U of arcing horn 50%the key step of flash-over characteristic test is as follows:
(1) the synchronous electric block of straighforward operation, makes mobile cross-arm steadily decline along fixed guide, until be convenient to artificial terrain clearance position power-off of installing test product on ground on mobile cross-arm, electric block self-locking, mobile cross-arm is fixed;
(2) according to testing program, according to the installation approach of composite insulator string and arcing horn, determine the position of mobile cross-arm upper connecting rod and length and carry out fixing, having hung composite insulator string and arcing horn and analog conducting wire etc., connected high-voltage connection and ground wire etc. simultaneously;
(3) the synchronous electric block of straighforward operation, makes mobile cross-arm steadily rise along fixed guide, until the safe terrain clearance position power-off of testing requirements, and electric block self-locking, mobile cross-arm and test product are fixed;
(4) according to thunder impulse discharge characteristics U 50%test procedure start test, and to make a record;
(5) the synchronous electric block of straighforward operation again, makes mobile cross-arm steadily decline along fixed guide, until be convenient to manually in the terrain clearance position power-off of terrestrial operation test product, and electric block self-locking, mobile cross-arm is fixed;
(6) according to testing program, regulate arcing horn size on ground, repeat step (2), (3), (4), (5) until composite insulator string coordinates the Lightning Characteristic test under different arcing horn size all to complete;
(7) after test all completes, the synchronous electric block of straighforward operation, makes mobile cross-arm steadily decline along fixed guide, until be convenient to the terrain clearance position power-off of manually removing test product on ground, electric block self-locking, mobile cross-arm is fixed;
(8) remove test product, the synchronous electric block of straighforward operation, makes mobile cross-arm drop to ground, wire rope is not stressed.
The thunder impulse discharge characteristics U of composite insulator ribbon parallel connection gaps 50%test findings as follows, wherein arcing horn powers on very clavate, and bottom electrode is racket-shaped.Its lightning impulse U when the ratio of arcing horn gap length and composite insulator string structure height is 0.80 50%the test findings of flash-over characteristic as following table 1, its thunder impulse discharge characteristics U 50%for being 953.86kV.
Table 1

Claims (1)

1. the portable test shaft tower detected for transmission circuit insulator string high-voltage performance, it is characterized in that, test tower body adopts framed structure, two pillars (3) bottom adopts pre-embedded anchoring bolts (1) to fix with the basis (2) of concreting, fixing cross-arm (5) central authorities on pillar (3) top arrange the synchronous electric block (8) of two band auto-lock functions, two electric blocks are connected with mobile cross-arm (6) two ends of wire rope (10) with fixing cross-arm (5) below respectively by the fixed block (12) of two pillars (3) inner side near top, the fixed guide (4) that mobile cross-arm (6) is arranged with two pillars (3) inner side forms guideway (7), the connecting link (14) hanging test product insulator chain (15) can releasably be arranged on mobile cross-arm (6) flexibly, wire rope (10) is connected by electrical isolation insulator (11) with mobile cross-arm (6).
CN201310038489.7A 2013-01-31 2013-01-31 A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance Active CN103175998B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310038489.7A CN103175998B (en) 2013-01-31 2013-01-31 A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310038489.7A CN103175998B (en) 2013-01-31 2013-01-31 A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance

Publications (2)

Publication Number Publication Date
CN103175998A CN103175998A (en) 2013-06-26
CN103175998B true CN103175998B (en) 2016-04-20

Family

ID=48635991

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310038489.7A Active CN103175998B (en) 2013-01-31 2013-01-31 A kind of portable test shaft tower detected for transmission circuit insulator string high-voltage performance

Country Status (1)

Country Link
CN (1) CN103175998B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104444878A (en) * 2014-11-12 2015-03-25 宁夏嘉翔自控技术有限公司 Pump type overhauling and hoisting device for sewage treatment system for filtering quartz sand
CN104330672B (en) * 2014-11-14 2015-08-12 贵州电网公司输电运行检修分公司 Motion guide rail formula electric transmission line isolator automatic detection device and detection method
CN104502747B (en) * 2014-12-02 2017-08-08 国家电网公司 A kind of apparatus and method detected suitable for extra-high voltage insulator
CN105019713B (en) * 2015-08-13 2017-07-07 国家电网公司 A kind of Novel electric line bar
CN108398620B (en) * 2018-02-12 2020-10-09 西北核技术研究所 Surface flashover experiment sample replacing device, experiment device and sample replacing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201149613Y (en) * 2008-01-18 2008-11-12 北京国电华北电力工程有限公司 Door type skeleton tower for outdoor impact test site
CN201148761Y (en) * 2008-01-18 2008-11-12 北京国电华北电力工程有限公司 Experiment line segment door type tangent tower
CN202330626U (en) * 2011-11-07 2012-07-11 江西省电力科学研究院 Withstand voltage test platform of live line tool
CN202486159U (en) * 2011-12-05 2012-10-10 安康供电局 Lifting insulated rod testing support

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3226653B2 (en) * 1993-02-08 2001-11-05 チクシ電気株式会社 Transmission line tower flash detection system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201149613Y (en) * 2008-01-18 2008-11-12 北京国电华北电力工程有限公司 Door type skeleton tower for outdoor impact test site
CN201148761Y (en) * 2008-01-18 2008-11-12 北京国电华北电力工程有限公司 Experiment line segment door type tangent tower
CN202330626U (en) * 2011-11-07 2012-07-11 江西省电力科学研究院 Withstand voltage test platform of live line tool
CN202486159U (en) * 2011-12-05 2012-10-10 安康供电局 Lifting insulated rod testing support

Also Published As

Publication number Publication date
CN103175998A (en) 2013-06-26

Similar Documents

Publication Publication Date Title
CN103618249B (en) ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques
CN204190173U (en) A kind of novel ball lightning rod
CN104124783A (en) Electricity fetching device based on electric transmission line aerial thunder prevention ground wires
CN104849600B (en) A kind of arrester detecting device and its application method
CN202068162U (en) High-voltage distribution line lightning prevention system
CN205791227U (en) Charged for replacement UHV transmission line insulator chain tool set
CN202330626U (en) Withstand voltage test platform of live line tool
CN204789650U (en) Multifunctional test stand
CN103523704A (en) Detachable support applied to lifting of small-sized electric power device and construction method thereof
CN103086278A (en) Sliding type gantry crane and application thereof
CN202633786U (en) Inlet wire bridge stand mounting platform for mid-set switch cabinet
CN104518475A (en) Distribution network integrated lightning protection system
CN202486159U (en) Lifting insulated rod testing support
CN103362343A (en) Same-tower six-loop tower
CN102664358B (en) Live replacement method for static contact of 220 kV flexible busbar
CN102721907A (en) Method for testing power-frequency and impulse superimposed voltage in high-altitude region
CN105118588A (en) Method of parallel gap design of composite insulators of 500-kV power transmission line
CN101728787A (en) Equipotential access method of 500kV same-tower four-circuit transmission line tangent tower live-wire work
CN103383400B (en) A kind of insulation safety device preventability test device
CN204439667U (en) A kind of portable type current transformer testing clamp
CN205941789U (en) Scalable universal type superfrequency sensor fixed device
CN203729647U (en) Cable terminal tower device
CN107994527A (en) A kind of high tension electric tower wire insulation buffer unit
CN203289006U (en) Insulation adjustable yoke plate
CN202562960U (en) 10-kilovolt (kV) arrester test-bed rack

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant