CN104201485B - A kind of short circuit grounding line apparatus with blocking function - Google Patents
A kind of short circuit grounding line apparatus with blocking function Download PDFInfo
- Publication number
- CN104201485B CN104201485B CN201410482939.6A CN201410482939A CN104201485B CN 104201485 B CN104201485 B CN 104201485B CN 201410482939 A CN201410482939 A CN 201410482939A CN 104201485 B CN104201485 B CN 104201485B
- Authority
- CN
- China
- Prior art keywords
- ground connection
- chuck
- lead
- ground
- circuit
- 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
- 230000000903 blocking effect Effects 0.000 title claims abstract description 17
- 238000009413 insulation Methods 0.000 claims description 34
- 230000006698 induction Effects 0.000 claims description 11
- 238000010891 electric arc Methods 0.000 claims description 6
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 208000028659 discharge Diseases 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000505 pernicious effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000000411 inducer Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 208000033999 Device damage Diseases 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to a kind of short circuit grounding line apparatus with blocking function, including action bars (1), ground connection chuck (4), earth lead exit (25), ground lead (26) and earth terminal chuck (5), described ground connection chuck (4) is connected with ground lead (26) by earth lead exit (25), described ground lead (26) is connected with earth terminal chuck (5), described action bars (1) is provided with charged prior-warning device (6) near ground connection chuck (4) side, this is provided with charged prior-warning device (6) and includes misoperation-proof locking device (7), operator are when carrying out ground connection maloperation, locked by misoperation-proof locking device (7), ensure the personal safety of operator.Compared with prior art, the present invention has the advantages such as safe and reliable, easy to operate.
Description
Technical field
The present invention relates to field of power, especially relate to a kind of short circuit grounding line apparatus with blocking function.
Background technology
Short-circuit grounding wire is the safety appliance that a kind of electric power apparatus examination operation is indispensable, but carrys additionally short circuit and connect electricity
The operation of line is once slipped up, and carrys additionally short-circuit grounding wire to the power equipment of charging operation such as by mistake, will cause
Serious high pressure equipment metallic earthing short circuit, produces great short circuit current and high-temperature electric arc, causes field apparatus
The major accident that moment burns, operator's electric arc burn is even dead.
Along with in-depth and the progress of technology of anti-misoperation management system, power industry misoperation fault declines year by year,
But a lot of pernicious misoperation fault also fails to fundamentally stop, the pernicious behaviour by mistake of such as band cable address short-circuit grounding wire
Make accident the most still to happen occasionally.Both caused serious device damage with cable address short-circuit grounding wire, also resulted in the tightest
The personal injury of weight, but this problem is so far still without the solution of technological layer.Chinese patent
CN201210398449 proposes a kind of anti-misoperation electricity earthing cable, and this technology is by conventional short-circuit grounding wire
Between ground connection chuck and earth terminal chuck, interlock is set, " first hang equipment end, hang earth terminal afterwards " can be prevented
Violation operation situation, but for being grounded equipment and sending a telegram here suddenly, equipment nameplate mark mistake, electroscope fault etc.
The mistake caused is to the situation of charging operation hanging equipment earth lead, and this technology, entirely without effect, develops one logical for this
Cross technological means to stop the scheme of band cable address short-circuit grounding wire and just seem particularly necessary.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide a kind of safe and reliable,
The easy to operate short circuit grounding line apparatus with blocking function.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of short circuit grounding line apparatus with blocking function, it is characterised in that include action bars 1, ground connection chuck
4, earth lead exit 25, ground lead 26 and earth terminal chuck 5, described ground connection chuck 4 is drawn by earth lead
Going out end 25 to be connected with ground lead 26, described ground lead 26 is connected with earth terminal chuck 5, described operation
Bar 1 is provided with charged prior-warning device 6 near ground connection chuck 4 side, and this is provided with charged prior-warning device 6 and includes anti-error
Operation blocking device 7, operator, when carrying out ground connection maloperation, are locked by misoperation-proof locking device 7,
Ensure the personal safety of operator.
Described misoperation-proof locking device 7 includes electric magnet 8, impedor 9, electrode 10, spring 11 and absolutely
Edge housing 12, it is internal that described electric magnet 8, impedor 9, spring 11 are positioned at described insulation shell 12, described
Spring 11 is axially installed between described ground connection chuck 4 and the bottom of described insulation shell 12, described insulation shell
The top and bottom of 12 is respectively equipped with the hole 13,14 moved axially for described ground connection chuck 4 with action bars 1 work,
The side of described ground connection chuck 4 is provided with bayonet socket 15, described bayonet socket 15 and armature 22 position of described electric magnet 8
Corresponding, described electrode 10 is positioned at the top of described insulation shell 12, and with described impedor 9, electric magnet
It is connected with described ground connection chuck 4 after the coils connected in series of 8, when operator are when carrying out ground connection maloperation, described electricity
Pole 10 electric discharge forms electric arc and sound warning, armature 22 action of described electric magnet 8, stretches in bayonet socket 15,
Make this device locked.
Described insulation shell 12 upper end is provided with insulation cover plate 23, and outside is provided with for rainproof insulation cluster parachute 28.
Described impedor 9 is in series by resistance, electric capacity or resistance capacitance.
Described insulation shell 12 uses elastomeric material to be made.
Described ground lead 26 be three-phase convergent current type or three-phase split type.
Described ground connection chuck 4 is spiral or spring.
Also including last secondary earth lead discriminating gear 16, this last secondary earth lead discriminating gear 16 is one
Body formula or dismountable type, in order to differentiate whether this functional arrangement is last secondary ground path.
Last width earth lead discriminating gear 16 described includes that 17, AC signal of an induction coil occurs electricity
18, one, road, 19, impedance measuring circuit 20 of power circuit and a display circuit 21, described exchange letter
Number occur to connect with impedance measuring circuit 20 and induction coil 17 described in circuit 18, described power circuit 19
It is connected with described ac signal circuit 18.
Compared with prior art, the present invention makes traditional short-circuit grounding wire possess electricity prompting or blocking function,
When this earth lead is hung in time having electric equipment by operator, the alarm device on contact or blocking device above earth lead
Action, reminds operator's equipment live, it is necessary to stopping hanging ground-wire immediately, locking type product can also close ground connection immediately
Chuck or isolation ground lead, make earth lead to hang up, and fundamentally avoid that by mistake hanging earthing conductor causes is pernicious
Accident.The present invention can also have last earth lead discrimination function, the side injected by custom-designed AC signal
Formula judges whether the earth lead removed at present is last root, the accident of anti-leak-stopping dismounting ground wire combined floodgate power transmission.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the circuit block diagram of last secondary earth lead discriminating gear of the present invention.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
Referring to accompanying drawing 1, this is the structural representation of first embodiment of the invention.Charged prior-warning device 6 therein
It is made up of a misoperation-proof locking device 7.This misoperation-proof locking device by electric magnet 8, impedor 9,
The parts such as electrode 10, spring 11, insulation shell 12 are constituted, and electric magnet 8, impedor 9, spring 11 are positioned at
Inside insulation shell, spring 11 is axially installed between the bottom of ground connection chuck 4 and insulation shell 12, insulation shell
The top and bottom of body 12 is respectively equipped with the hole 13,14 moved axially for ground connection chuck 4, ground connection with action bars
The side of chuck 4 is provided with a bayonet socket 15, and this bayonet socket is corresponding with armature 22 position of electric magnet 8, electrode 10
Be positioned at the top of insulation shell 12, and with impedor 9, electric magnet 8 coils connected in series after with ground connection chuck 4
It is connected.Being additionally provided with insulation cover plate 23 on the top hole 13 of insulation shell 12, ground connection chuck 4 passes through grounding lead
Go out end 25 to be connected with ground lead 26.
Compared with conventional short-circuit grounding wire, the present embodiment has had more a charged prior-warning device 6, and this device is by preventing
Incorrect manipulation deadlock device 7 is constituted.When operator's hanging earthing conductor operates, first earth terminal chuck 5 is connect with scene
Ground row connects jail, and then the ground connection chuck 4 of every phase is hung up and needs ground connection by hand-held bar 1, operation handle 3 successively
Electrical equipment, complete hanging earthing conductor operation.The misoperation-proof locking device 7 of the present embodiment equally with the connecing of every phase
Ground chuck is connected as a single entity, and during operation earth lead described in the present embodiment, need misoperation-proof locking device 7 is exhausted
The top of edge housing 12 is pointed at earth lead suspension, is withstood at earth lead suspension by insulation shell 12 top side
Lower section, then upwards pushes hard operation handle, overcomes the elastic force of spring 11, by the ground connection chuck in shell from hole
After ejecting in hole 13, on earth clip head-clamp to equipment, turn operation handle subsequently, by fastening screw thread 27
Ground connection chuck is tightened at ground connection suspension, just can complete hanging earthing conductor operation.If equipment live, work as insulation shell
Body 12 is in time having electric equipment, and due to the electric potential difference between earth lead and charging equipment, equipment will be to insulation shell
The electrode 10 on top discharges, and forms obvious electric arc and frizzle, plays obvious prompt alarm effect, carries
Wake up operator's equipment have electricity, must the most off-ground operation.Due to the metering function of impedor 9, make stream
The arc current crossing it is the least, will not cause arc short-circuit.If operator continue to operate by force, due to this
Arc current enters ground by impedor 9, the coil of electric magnet 8, ground lead 26, and electric magnet 8 is encouraged immediately
Magnetic, armature 22 ejects, and stretches into corresponding bayonet socket 15, is blocked by ground connection chuck 4, even if exerting oneself the most again
Up pushing away, ground connection chuck also cannot eject in insulation shell 12, because ground connection chuck is closed, and earth lead
Cannot hang up, serve the effect of forced blocking.When this blocking function works, the ground connection chuck of the present embodiment
4, impedor, electric magnet, ground outlet etc. are completely sealed inside in insulation shell, the most no matter operate
How personnel move back and forth, and cause accident all without causing equipment electric arc of discharge.The present embodiment possesses the most perfect anti-error
Operation blocking function, even if personnel's cruelty operates by force, is also not result in accident, can become and prevent hanging earthing conductor by mistake
Last one impassable defence line of serious accident.
In order to improve the insulation safety performance of the present embodiment further, top hole 13 is provided with insulation cover plate
23, the locking being possible to prevent charging equipment to cause the early discharge of internal earth clip head is malfunctioning, is also equipped with preventing simultaneously
The effect of rain；The outside of insulation shell 12 also can axially arranged promise dry tablet insulation cluster parachute 28, improve misty rain weather
Processing safety energy；Insulation shell preferably uses transparent composite manufacture, in order to see internal mechanism running-active status clearly；
The impedor of the present embodiment uses the resistance of multiple series connection to constitute, and the most once a resistance punctures, and also has other
Resistance play metering function, ground short circuit would not be caused, the value of this resistance to ensure in specified electric pressure
Under, the arc current flow through is less than 5A, to ensure to cause arc short-circuit.This impedor the most also may be used
To be made up of capacitor or inducer, or resistance and capacitor, inducer are in series, so can reduce resistance unit
The heating of part, extends the life-span of whole misoperation-proof locking device.Insulation retaining ring 2 is used for pointing out operator hand
Position, prevents from getting an electric shock.The present embodiment is particularly suited for the various earth lead indoor, outdoor of below 66KV and uses.Its
Frame for movement is the most ingenious, convenient for production, and required parts, without particular/special requirement, use the most very convenient, it is not necessary to unnecessary
Operation, when for cable, capacitor ground connection operate time, the impedor of the present embodiment has possessed discharging rod
Effect, therefore can remove discharge operation from, improve the convenience of operation further.
Short-circuit grounding wire on electrical equipment, is substantially and arranges to ensure overhaul of the equipments safety, once examine
Repaiied need recover power transmission time, if the short-circuit grounding wire carried additionally before forget remove, be equivalent to ground connection short
The equipment combined floodgate power transmission on road, its serious consequence caused it is also evident that.Often want during electrical equipment interruption maintenance
Overpaying short-circuit grounding wire several local extensions, as long as there being a pair to forget, dismounting may result in catastrophic serious thing
Therefore.Although line combined floodgate power transmission with ground seldom results in personal injury caused by an accident, but also equipment and electrical network can be caused serious harm,
For this problem, the present embodiment it be also provided with last secondary earth lead discriminating gear 16, in order to overcome
Earth lead is omitted and is removed the potential safety hazard caused.This device includes 17, AC signal of an induction coil
There is electricity 19, impedance measuring circuit 20 of 18, power circuit and a display circuit 21, exchange letter
Number occur circuit 18 connect with impedance measuring circuit 20 and induction coil 17, power circuit 19 and AC signal
Circuit 18 is occurred to be connected, referring to shown in accompanying drawing 2.
Induction coil 17 is for ground lead 26 coupled signal electric current, and power circuit 19 occurs to AC signal
Circuit 18 is powered, and is allowed to produce an AC signal, and then this signal transports to sensing by impedance measuring circuit 20
Coil 17, this AC signal is loaded into ground lead 26 by the way of electromagnetic induction couples by induction coil 17
On, if this earth lead is last the secondary earth lead hung on this electrical equipment, then this AC signal is at grounding lead
Can not constitute loop on line, the input impedance of induction coil is the biggest, and this resistance value is passed through aobvious by impedance measuring circuit
Showing that circuit 20 shows, operator are by the impedance of display, so that it may know that this pair earth lead is that last is secondary
Earth lead, just can normal power transmission after dismounting.If this electrical equipment also hangs with other earth leads do not removed, then this
Individual AC signal constitutes loop by the earth on ground lead, and the input impedance of induction coil is the least, and impedance is surveyed
This resistance value is shown by amount circuit equally by display circuit 20, and operator are by the impedance of display, just
Know on this equipment, also have the earth lead omitted, could power transmission after needing dismounting clear.Line of induction snare is preferably ground connection
Lead-in wire three-phase river outlet, the most once tests and just can know that three-phase ground line has been removed totally the most.AC signal
Occur circuit AC signal frequency can not be too high or too low, to be preferred close to power frequency, prevent frequency too high too low,
Transformer Winding or capacitor shunting on equipment cause measurement inaccurate.Last secondary earth lead that the present embodiment possesses
Discrimination function, is allowed to possessed the dual strick precaution effect preventing live connection of ground wire, preventing line combined floodgate power transmission with ground
Really, improve the anti-misoperation performance of the present invention further, can fundamentally stop because earth lead misoperation is drawn
Electricity power production accident.Certainly, last secondary earth lead discriminating gear of the present embodiment also can be similar to by other
Impedance loop test circuit composition.
It will be noted that the above embodiments are for illustrating the present invention and not to limit the present invention, such as this
Bright described short-circuit grounding wire both can be three-phase convergent current type can also be that three-phase is split type；Ground connection chuck both may be used
Be screw type can also be spring；Misoperation-proof locking device can use completely other similar machineries or
Electric locking device；Last width earth lead discriminating gear both can be formed integrally with earth lead can also make removable
Unload type；Etc..Many technical characteristics in different embodiments of the invention are interchangeable or omit, the ginseng of many elements
Number setting can change as required, and the "a" or "an" before element of the present invention is not excluded for multiple this unit occur
Part, these changes all should belong to protection scope of the present invention.
Claims (5)
1. a short circuit grounding line apparatus with blocking function, it is characterised in that include action bars (1), connect
Ground chuck (4), earth lead exit (25), ground lead (26) and earth terminal chuck (5), described ground connection
Chuck (4) is connected with ground lead (26) by earth lead exit (25), described ground lead (26)
Being connected with earth terminal chuck (5), described action bars (1) is provided with charged early warning dress near ground connection chuck (4) side
Putting (6), this charged prior-warning device (6) includes misoperation-proof locking device (7), and operator are carrying out ground connection
During maloperation, locked by misoperation-proof locking device (7), it is ensured that the personal safety of operator；
Described misoperation-proof locking device (7) includes electric magnet (8), impedor (9), electrode (10), bullet
Spring (11) and insulation shell (12), described electric magnet (8), impedor (9), spring (11) are positioned at institute
State insulation shell (12) internal, described spring (11) be axially installed in described ground connection chuck (4) with described absolutely
Between the bottom of edge housing (12), the top and bottom of described insulation shell (12) is respectively equipped with for described ground connection
Chuck (4) and action bars (1) make the hole (13,14) moved axially, the side of described ground connection chuck (4)
Being provided with bayonet socket (15), described bayonet socket (15) is corresponding with the armature of described electric magnet (8) (22) position, institute
State electrode (10) and be positioned at the top of described insulation shell (12), and with described impedor (9), electric magnet (8)
Coils connected in series after be connected with described ground connection chuck (4), when operator are when carrying out ground connection maloperation, described
Electrode (10) electric discharge forms electric arc and sound warning, armature (22) action of described electric magnet (8), stretches into
In bayonet socket (15), make misoperation-proof locking device (7) locked；
Described insulation shell (12) upper end is provided with insulation cover plate (23), and outside is provided with for rainproof insulation cluster parachute
(28)；
Also include last secondary earth lead discriminating gear (16), this last secondary earth lead discriminating gear (16)
For integral type or dismountable type, in order to differentiate whether functional arrangement is last secondary ground path；
Last secondary earth lead discriminating gear (16) described includes an induction coil (17), an AC signal
There is circuit (18), a power circuit (19), an impedance measuring circuit (20) and a display circuit (21),
Described ac signal circuit (18) is connected with described impedance measuring circuit (20) and induction coil (17),
Described power circuit (19) is connected with described ac signal circuit (18).
A kind of short circuit grounding line apparatus with blocking function the most according to claim 1, it is characterised in that
Described impedor (9) is in series by resistance, electric capacity or resistance capacitance.
A kind of short circuit grounding line apparatus with blocking function the most according to claim 1, it is characterised in that
Described insulation shell (12) uses elastomeric material to be made.
A kind of short circuit grounding line apparatus with blocking function the most according to claim 1, it is characterised in that
Described ground lead (26) be three-phase convergent current type or three-phase split type.
A kind of short circuit grounding line apparatus with blocking function the most according to claim 1, it is characterised in that
Described ground connection chuck (4) is spiral or spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410482939.6A CN104201485B (en) | 2014-09-19 | 2014-09-19 | A kind of short circuit grounding line apparatus with blocking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410482939.6A CN104201485B (en) | 2014-09-19 | 2014-09-19 | A kind of short circuit grounding line apparatus with blocking function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104201485A CN104201485A (en) | 2014-12-10 |
| CN104201485B true CN104201485B (en) | 2016-11-09 |
Family
ID=52086741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410482939.6A Active CN104201485B (en) | 2014-09-19 | 2014-09-19 | A kind of short circuit grounding line apparatus with blocking function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104201485B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201486B (en) * | 2014-09-19 | 2016-07-20 | 国家电网公司 | A kind of Portable short-circuit grounding device |
| CN105356094A (en) * | 2015-11-23 | 2016-02-24 | 国家电网公司 | Plug-in ground wire safety operation device |
| CN106093687A (en) * | 2016-07-28 | 2016-11-09 | 国网辽宁省电力有限公司丹东供电公司 | Intelligent anti-line with ground closes a floodgate and detects device |
| CN106405166A (en) * | 2016-10-28 | 2017-02-15 | 国网浙江省电力公司金华供电公司 | Ground line of display device with current |
| CN107069259B (en) * | 2016-12-12 | 2019-05-24 | 国网北京市电力公司 | Portable ground line |
| CN106935986A (en) * | 2017-04-15 | 2017-07-07 | 霍昆 | A kind of use for laboratory is in the locking-type discharging rod of capacitor discharge |
| CN107275968A (en) * | 2017-06-23 | 2017-10-20 | 新疆华泰重化工有限责任公司 | A kind of electric handle of anti-dislocation |
| CN109510004B (en) * | 2019-01-11 | 2023-09-01 | 国网冀北电力有限公司唐山供电公司 | Device and method for connecting temporary ground wire with voltage of 110kV or above |
| CN110429411B (en) * | 2019-08-30 | 2024-03-08 | 湖北华电江陵发电有限公司 | Short-circuit grounding wire combined head |
| CN111525296B (en) * | 2020-05-27 | 2021-05-18 | 南京盾捷电气科技有限公司 | Automatically-controlled grounding wire device hung on contact net and control method thereof |
| CN112398040A (en) * | 2020-11-06 | 2021-02-23 | 贵州电网有限责任公司 | Device for rapidly finding and searching live wire grounding of distribution transformer line |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2588564Y (en) * | 2002-06-11 | 2003-11-26 | 刘叔铭 | Grounding wire with alarm |
| CN100461536C (en) * | 2006-10-26 | 2009-02-11 | 珠海优特电力科技股份有限公司 | A mistaken lock prevention ground line control system and control method |
| CN201191653Y (en) * | 2008-05-13 | 2009-02-04 | 辽宁省电力有限公司阜新供电公司 | Earthing wire terminal protecting cover for error locking preventing apparatus |
| CN201421969Y (en) * | 2009-05-15 | 2010-03-10 | 珠海优特电力科技股份有限公司 | Detection locking device of temporary grounding wire |
| CN201594594U (en) * | 2009-07-24 | 2010-09-29 | 范永涛 | Electric pre-alarming grounding wire operating rod |
| CN103001021B (en) * | 2012-12-11 | 2015-03-25 | 国家电网公司 | Earth clamp |
| CN202975225U (en) * | 2012-12-13 | 2013-06-05 | 云南电网公司临沧供电局 | Misoperation preventive device for power transmission lines |
| CN103489281B (en) * | 2013-06-18 | 2018-04-13 | 国家电网公司 | Alarm is torn in ground wire leakproof open |
| CN104241969B (en) * | 2014-09-19 | 2016-09-14 | 国家电网公司 | A kind of simple type short-circuit grounding device |
| CN107104328B (en) * | 2014-09-19 | 2019-06-18 | 国家电网公司 | A kind of anti-misoperation short-circuit grounding device of band auxiliary collet |
-
2014
- 2014-09-19 CN CN201410482939.6A patent/CN104201485B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104201485A (en) | 2014-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104201485B (en) | A kind of short circuit grounding line apparatus with blocking function | |
| CN104241968B (en) | A kind of anti-misoperation short-circuit grounding device | |
| CN201788245U (en) | Online monitor device for service life of arrester with gaps | |
| CN104241969B (en) | A kind of simple type short-circuit grounding device | |
| CN104111412B (en) | The protection attachment structure for preventing variable-frequency power sources cabinet interior element from being impacted by test product flashover | |
| CN201262637Y (en) | Phase failure alarm device | |
| CN104201513B (en) | A kind of anti-misoperation short-circuit grounding wire based on location bar | |
| CN207007960U (en) | A kind of overhead transmission line Zinc oxide arrester monitoring device | |
| CN203871688U (en) | Arc-extinguishing resonance-eliminating cabinet | |
| CN205377261U (en) | Secondary over -voltage protector of current transformer | |
| CN104201486B (en) | A kind of Portable short-circuit grounding device | |
| CN204205578U (en) | A kind of efficient high-speed current limiting action device | |
| CN206060164U (en) | Overvoltage protection device | |
| CN203942274U (en) | Portable power capacitor residual charge discharger | |
| CN201478826U (en) | Matrix type lightning surge protector | |
| CN202351363U (en) | Novel ground fault warning device | |
| CN205157582U (en) | GIS and main neutral point arrester on -line monitoring ware installation device that becomes | |
| CN206725721U (en) | Alarm relay protection device | |
| CN204330922U (en) | Lightning arrester on-line checkingi safety feature | |
| CN205067581U (en) | A non -residual voltage discharging counter | |
| CN205039515U (en) | Voltage type earth leakage protector | |
| CN204030580U (en) | A kind of overvoltage inhibiting apparatus with small current line selection | |
| CN107809101A (en) | Overvoltage protection device | |
| CN203150954U (en) | Low-voltage power distribution cabinet | |
| CN208508523U (en) | A kind of Current Transformer Secondary overvoltage protector |
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 |