CN108132362A - Deformation of transformer winding altitude test clamps - Google Patents
Deformation of transformer winding altitude test clamps Download PDFInfo
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- CN108132362A CN108132362A CN201711254418.5A CN201711254418A CN108132362A CN 108132362 A CN108132362 A CN 108132362A CN 201711254418 A CN201711254418 A CN 201711254418A CN 108132362 A CN108132362 A CN 108132362A
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- insulating bar
- jaw
- deformation
- binding clip
- transformer winding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
Abstract
Deformation of transformer winding altitude test clamps, and experiment pincers include the binding clip being made of upper jaw and lower jaw, are arranged on the insulating bar of binding clip bottom and the conductor rod being arranged below lower jaw.Deformation of transformer winding altitude test pincers the present invention is based on method of frequency response method connect, fix test connection by setting a special jointing clamp, and jointing clamp uses BNC connector, ensure that signal end, input terminal and shielding end effectively work.Using light Special insulative operating rod, realize that wiring works by operating arm dedicated.The binding clip angle of jointing clamp can change, and can complete the wiring work of wiring position different angle, different-thickness, different-diameter, avoid working at height.
Description
Technical field
The present invention provides a kind of deformation of transformer winding altitude test pincers based on method of frequency response method.
Background technology
Transformer winding form transformer electricity access and be easier to the position broken down, and due to transformer around
Group can not intuitively see that lifting, which checks, needs a large amount of human and material resources, financial resources, generally analyze transformation using method of frequency response method at present
The situation of device winding deformation, so as to judge the abort situation of transformer winding and reason.During experiment, due to transformer high-voltage
Casing is higher, in experiment disconnects line process, generally requires to carry out by high-altitude operation vehicle, expends a large amount of human and material resources, wealth
Power.Simultaneously as needing operation of ascending a height, the security risk of operation is also increased.
Invention content
Goal of the invention：The present invention provides a kind of deformation of transformer winding altitude test pincers based on method of frequency response method, the purpose is to
Working at height is avoided, improves test efficiency, less human and material resources, financial resources.
Technical solution
The present invention is achieved through the following technical solutions：
A kind of deformation of transformer winding altitude test special jointing clamp based on method of frequency response method, which is characterized in that setting one is special
Jointing clamp is for connecting, fixing test connection, and jointing clamp uses BNC connector, and test signal and signal acquisition pass through bnc interface
Instrument host is transferred to, ensures that signal end, input terminal and shielding end effectively work.Using light Special insulative operating rod,
Wiring is completed by operating arm dedicated on ground to work.The binding clip angle of jointing clamp can change, and can complete wiring position difference
The wiring work of angle, different-thickness, different-diameter.
Jointing clamp is connect using BNC connector with test main frame, and sets hook, and the gravity of bearing test wiring avoids growing
Time service failure BNC connector.
Using light Special insulative operating rod, insulation pole length makes testing crew can be complete on ground at 6 meters or more
It is operated into test connection.
The jointing clamp of angle adjustable is set, is worked using the wiring of multiple angles, different-thickness, different-diameter.
Deformation of transformer winding altitude test clamps, it is characterised in that：Experiment pincers are included by upper jaw（1）And lower jaw
（3）The binding clip of composition, the insulating bar for being arranged on binding clip bottom（7）And it is arranged on lower jaw（3）The conductor rod of lower section
（2）.
In connection upper jaw（1）And lower jaw（3）Binding clip upright bar on be provided with BNC signal ends（4）, BNC input terminals
（5）, shielding end（6）With load-bearing link（8）.
Connect upper jaw（1）And lower jaw（3）Binding clip upright bar（9）Bottom end pass through shaft and insulating bar（7）It is living
Dynamic connection so that binding clip upright bar（9）It can be to upper jaw（1）And lower jaw（3）The left and right sides（That is perpendicular to drawing in Fig. 1
Direction！The left and right sides in Fig. 2）It swings.
Binding clip upright bar（9）Bottom end pass through shaft and transition swing rod（10）Flexible connection so that binding clip upright bar（9）It can be upwards
Jaw（1）And lower jaw（3）The left and right sides（That is perpendicular to the direction of drawing in Fig. 1！The left and right sides in Fig. 2）It swings, and
Transition swing rod（10）Pass through lower rotary shaft and insulating bar（7）Connection, so that transition swing rod（10）It also can be to upper jaw（1）With
Lower jaw（3）The left and right sides（That is perpendicular to the direction of drawing in Fig. 1！The left and right sides in Fig. 2）It swings.
In insulating bar（7）On be provided with line winder, the line winder include upper stay hook（11）, lower movable hook
（12）And regulating device；Upper stay hook（11）With lower movable hook（12）It is arranged on insulating bar（7）Side wall, upper stay hook
（11）With insulating bar（7）It is fixed, lower movable hook（12）It is arranged on stay hook（11）Lower section and lower movable hook（12）Energy
Along insulating bar（7）Axial direction do relative to insulating bar（7）Movement；
Regulating device includes housing（13）, adjusting bolt（30）Be arranged on housing（13）Interior herringbone adjustable shelf, the herringbone
Shape adjustable shelf is included by upper supporting leg（14）With lower supporting leg（15）, upper supporting leg（14）Lower end and lower supporting leg（15）Upper end pass through top
Point shaft（16）The herringbone structure to constitute by an active connection, upper supporting leg（14）Upper end supreme stay hook is flexibly connected by shaft
（11）, lower supporting leg（15）Lower end lower movable hook is articulated to by shaft（12）And pass through push pull maneuver Controlled mobilization hook
（12）Move up and down；Vertex shaft（16）Connect actuating sleeve（17）, with externally threaded adjusting bolt（30）One end put in
Actuating sleeve（17）It is interior and can be relative to actuating sleeve（17）Rotation, adjusting bolt（30）With actuating sleeve（17）Between it is axially opposing solid
It is fixed, with externally threaded adjusting bolt（30）The other end stretch out housing（13）And and housing（13）Between be threadedly coupled, pass through
Adjusting bolt（30）Rotation Controlled mobilization hook（12）Move up and down.
Lower movable hook（12）Rear end put in buffer pocket（18）It is interior and can be relative to buffer pocket（18）It does along insulating bar
（7）Axial movement, buffer pocket（18）With lantern ring（19）It is fixedly connected, lantern ring（19）It is sleeved on insulating bar（7）Outer and energy phase
For insulating bar（7）Do axial move up and down；Buffer pocket（18）Inside it is provided with buffer spring（31）, buffer spring（31）'s
Buffer pocket is fixed in bottom end（18）, buffer spring（31）The lower movable hook of top connection（12）And in lower movable hook（12）Relative to
Buffer pocket（18）It is kept when moving up to lower movable hook（12）Downward pulling force.
Wire-clamping device is provided with above line winder, which includes fixed bin（20）, gripping block（21）And folder
Tight ring（22）, fixed bin（20）It is fixed on insulating bar（7）On, gripping block（21）The wedge-shaped fixture block up big and down small for two pieces,
There are for clamping the interval of electric wire between two wedge-shaped fixture blocks, the upper end of two wedge-shaped fixture blocks sets mobile sliding block（23）, move
Movable slider（23）Put in horizontal concrete chute（24）It is interior and can be in horizontal concrete chute（24）Inside laterally move（That is the left and right two in Fig. 5
Side）, horizontal concrete chute（24）Rear end be provided with and put in fixed bin（20）Interior slide plate（25）, slide plate（25）With fixed bin（20）It is interior
Back-moving spring（26）Connection, slide plate（25）It can be along fixed bin（20）The vertical slide opening of bar shaped at middle part（27）It does and is grasped along insulation
Make bar（7）Axial moves up and down, and works as slide plate（25）Back-moving spring when moving up（26）It keeps to slide plate（25）Downward pulling force；Folder
Tight block（21）Lower end put in clamping ring（22）It is interior, and in gripping block（21）Two gripping blocks when westwards moving（21）Gradually clamp
Electric wire.Clamping ring（22）Upper and two gripping blocks（21）Between the corresponding position in interval be provided with the gap that supply lines is put into.
Advantage and effect：
The present invention provides a kind of deformation of transformer winding altitude test special jointing clamp based on method of frequency response method, which includes frequency response
Method test connection special jointing clamp, Special insulative operating rod, adjustable wiring binding clip, test signal and signal acquisition pass through BNC
Interface is transferred to instrument host, ensures that signal end, input terminal and shielding end effectively work, the binding clip angle of jointing clamp can become
Change, complete the test connection work of wiring position different angle, different-thickness, different-diameter, and test connection is completed on ground
Work, avoids working at height, without employing high-altitude operation vehicle, reduces the risk of working at height, improves detection efficiency.
And the present invention causes extra coil to be directly anchored to insulation and connect using special line winder and wire-clamping device
The side wall of line bar while being conveniently operated, increases safety.
The basic principle of frequency response method is that at higher frequencies, the iron core of transformer winding does not work substantially, around
Group can be equivalent to a passive Two-port netwerk Linear Network being made of inductance and capacitance equal distribution parameter.Due to transformer winding
Mathematical model be a Linear Time Invariant number system.When the input of stable Linear Time Invariant number system is sinusoidal quantity, stable state
Output and the sinusoidal quantity that input is same frequency, only amplitude and phase difference, stable state export the amplitude ratio with input only by net
Network parameter uniquely determines.Such as change the frequency of input signal, then amplitude ratio also changes correspondingly.Linear system is inputted in sinusoidal quantity
When, the relationship that stable state output is varied with frequency with the amplitude ratio inputted is known as the amplitude versus frequency characte of the system.It is using this method
It can obtain the amplitude-frequency response of system.
Deformation of transformer winding altitude test pincers the present invention is based on method of frequency response method are by setting a special jointing clamp to be used for
Connection, fixed test connection, jointing clamp use BNC connector, ensure that signal end, input terminal and shielding end effectively work.Using
Light Special insulative operating rod realizes that wiring works by operating arm dedicated.The binding clip angle of jointing clamp can change, can be complete
Wiring into wiring position different angle, different-thickness, different-diameter works, and avoids working at height.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the side view of Fig. 1.
In Fig. 1：1. the upper jaw of jointing clamps
2. the guide rod in adjustment binding clips direction
3. the lower jaw of jointing clamps
4. .BNC signal ends
5. .BNC input terminals
6. shields end
7. insulating bars
8. load-bearing links
Fig. 3 is the structure diagram of line winder；
Fig. 4 is the side view of wire-clamping device；
Fig. 5 is the front view of wire-clamping device.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1, the present invention provides a kind of deformation of transformer winding altitude test special jointing clamp based on method of frequency response method, this connects
Line tweezer includes：Upper jaw, lower jaw, guide rod, BNC signal ends, BNC input terminals, shielding end, insulating bar.
The special jointing clamp, installs BNC connector at an upper portion thereof.
The upper and lower jaw of jointing clamp is connected using pulley.
The guide rod uses snap.
The shielding end passes through nut fixed mask line using screw rod.
The insulating bar uses resin material.
Deformation of transformer winding altitude test clamps, it is characterised in that：Experiment pincers are included by upper jaw（1）And lower jaw
（3）The binding clip of composition, the insulating bar for being arranged on binding clip bottom（7）And it is arranged on lower jaw（3）The conductor rod of lower section
（2）.
In connection upper jaw（1）And lower jaw（3）Binding clip upright bar on be provided with BNC signal ends（4）, BNC input terminals
（5）, shielding end（6）With load-bearing link（8）.
Connect upper jaw（1）And lower jaw（3）Binding clip upright bar（9）Bottom end pass through shaft and insulating bar（7）It is living
Dynamic connection so that binding clip upright bar（9）It can be to upper jaw（1）And lower jaw（3）The left and right sides（That is perpendicular to drawing in Fig. 1
Direction！The left and right sides in Fig. 2）It swings.
Binding clip upright bar（9）Bottom end pass through shaft and transition swing rod（10）Flexible connection so that binding clip upright bar（9）It can be upwards
Jaw（1）And lower jaw（3）The left and right sides（That is perpendicular to the direction of drawing in Fig. 1！The left and right sides in Fig. 2）It swings, and
Transition swing rod（10）Pass through lower rotary shaft and insulating bar（7）Connection so that transition swing rod（10）It also can be to upper jaw（1）With under
Jaw（3）The left and right sides（That is perpendicular to the direction of drawing in Fig. 1！The left and right sides in Fig. 2）It swings.
In insulating bar（7）On be provided with line winder, the line winder include upper stay hook（11）, lower movable hook
（12）And regulating device；Upper stay hook（11）With lower movable hook（12）It is arranged on insulating bar（7）Side wall, upper stay hook
（11）With insulating bar（7）It is fixed, lower movable hook（12）It is arranged on stay hook（11）Lower section and lower movable hook（12）Energy
Along insulating bar（7）Axial direction do relative to insulating bar（7）Movement；
Regulating device includes housing（13）, adjusting bolt（30）Be arranged on housing（13）Interior herringbone adjustable shelf, the herringbone
Shape adjustable shelf is included by upper supporting leg（14）With lower supporting leg（15）, upper supporting leg（14）Lower end and lower supporting leg（15）Upper end pass through top
Point shaft（16）The herringbone structure to constitute by an active connection, upper supporting leg（14）Upper end supreme stay hook is flexibly connected by shaft
（11）, lower supporting leg（15）Lower end lower movable hook is articulated to by shaft（12）And pass through push pull maneuver Controlled mobilization hook
（12）Move up and down；Vertex shaft（16）Connect actuating sleeve（17）, with externally threaded adjusting bolt（30）One end put in
Actuating sleeve（17）It is interior and can be relative to actuating sleeve（17）Rotation, adjusting bolt（30）With actuating sleeve（17）Between it is axially opposing solid
It is fixed, with externally threaded adjusting bolt（30）The other end stretch out housing（13）And and housing（13）Between be threadedly coupled, pass through
Adjusting bolt（30）Rotation Controlled mobilization hook（12）Move up and down.
Lower movable hook（12）Rear end put in buffer pocket（18）It is interior and can be relative to buffer pocket（18）It does along insulating bar
（7）Axial movement, buffer pocket（18）With lantern ring（19）It is fixedly connected, lantern ring（19）It is sleeved on insulating bar（7）Outer and energy phase
For insulating bar（7）Do axial move up and down；Buffer pocket（18）Inside it is provided with buffer spring（31）, buffer spring（31）'s
Buffer pocket is fixed in bottom end（18）, buffer spring（31）The lower movable hook of top connection（12）And in lower movable hook（12）Relative to
Buffer pocket（18）It is kept when moving up to lower movable hook（12）Downward pulling force.
Wire-clamping device is provided with above line winder, which includes fixed bin（20）, gripping block（21）And folder
Tight ring（22）, fixed bin（20）It is fixed on insulating bar（7）On, gripping block（21）The wedge-shaped fixture block up big and down small for two pieces,
There are for clamping the interval of electric wire between two wedge-shaped fixture blocks, the upper end of two wedge-shaped fixture blocks sets mobile sliding block（23）, move
Movable slider（23）Put in horizontal concrete chute（24）It is interior and can be in horizontal concrete chute（24）Inside laterally move（That is the left and right two in Fig. 5
Side）, horizontal concrete chute（24）Rear end be provided with and put in fixed bin（20）Interior slide plate（25）, slide plate（25）With fixed bin（20）It is interior
Back-moving spring（26）Connection, slide plate（25）It can be along fixed bin（20）The vertical slide opening of bar shaped at middle part（27）It does and is grasped along insulation
Make bar（7）Axial moves up and down, and works as slide plate（25）Back-moving spring when moving up（26）It keeps to slide plate（25）Downward pulling force；Folder
Tight block（21）Lower end put in clamping ring（22）It is interior, and in gripping block（21）Two gripping blocks when westwards moving（21）Gradually clamp
Electric wire.Slide plate（25）Side be provided with stretching fixed bin（20）The moving plate 28 of side pulls slide plate by moving plate 28
（25）It moves up and down.Clamping ring（22）Upper and two gripping blocks（21）Between the corresponding position in interval be provided with supply lines and be put into
Gap.
It in use, will be from insulating bar（7）The electric wire that top extends is clamped first with wire-clamping device, concrete operations
It is as follows：By moving plate 28 by gripping block（21）It moves up so that gripping block（21）Between lateral separation increase, then will
Electric wire is placed in two gripping blocks（21）Between, moving plate 28 is then unclamped, later in back-moving spring（26）Under the action of, gripping block
（21）It moves down, and in clamping ring（22）Under the action of gradually clamp electric wire, and the remaining electric wire in lower section be then directly wound in it is solid
Determine hook（11）With lower movable hook（12）On, then rotate adjusting bolt（30）So that adjusting bolt（30）To putting in housing（13）
Direction movement, and then push so that lower supporting leg（15）Push lower movable hook（12）It moves down and holds out against the good coil inner wall of disk, after
Continuous rotation adjusting bolt（30）, buffer spring（31）It stretches, completes elastic buffer and fix.
During dismounting, adjusting bolt is first reversely rotated（30）Movable hook under so that（12）It moves up, unloads the coil twined, then
Moving plate 28 is pulled upwards so that gripping block（21）Between interval increase, then take out single electric wire.
Its is easy to operate, and during operation, circuit is regular, improves safety.
Claims (7)
1. deformation of transformer winding altitude test clamps, it is characterised in that：Experiment pincers are included by upper jaw（1）And lower jaw（3）
The binding clip of composition, the insulating bar for being arranged on binding clip bottom（7）And it is arranged on lower jaw（3）The conductor rod of lower section（2）.
2. deformation of transformer winding altitude test pincers according to claim 1, it is characterised in that：In connection upper jaw（1）
And lower jaw（3）Binding clip upright bar on be provided with BNC signal ends（4）, BNC input terminals（5）, shielding end（6）With load-bearing link
（8）.
3. deformation of transformer winding altitude test pincers according to claim 2, it is characterised in that：Connect upper jaw（1）With
Lower jaw（3）Binding clip upright bar（9）Bottom end pass through shaft and insulating bar（7）Flexible connection so that binding clip upright bar（9）Energy
To upper jaw（1）And lower jaw（3）The left and right sides swing.
4. deformation of transformer winding altitude test pincers according to claim 2, it is characterised in that：Binding clip upright bar（9）Bottom
End passes through shaft and transition swing rod（10）Flexible connection so that binding clip upright bar（9）It can be to upper jaw（1）And lower jaw（3）A left side
The right side is rolled to each side, and transition swing rod（10）Pass through lower rotary shaft and insulating bar（7）Connection, so that transition swing rod（10）Also can
To upper jaw（1）And lower jaw（3）The left and right sides swing.
5. the deformation of transformer winding altitude test pincers described in any one in claim 1-4, it is characterised in that：
Insulating bar（7）On be provided with line winder, the line winder include upper stay hook（11）, lower movable hook（12）It is filled with adjusting
It puts；Upper stay hook（11）With lower movable hook（12）It is arranged on insulating bar（7）Side wall, upper stay hook（11）It is operated with insulation
Bar（7）It is fixed, lower movable hook（12）It is arranged on stay hook（11）Lower section and lower movable hook（12）It can be along insulating bar
（7）Axial direction do relative to insulating bar（7）Movement；
Regulating device includes housing（13）, adjusting bolt（30）Be arranged on housing（13）Interior herringbone adjustable shelf, the herringbone
Shape adjustable shelf is included by upper supporting leg（14）With lower supporting leg（15）, upper supporting leg（14）Lower end and lower supporting leg（15）Upper end pass through top
Point shaft（16）The herringbone structure to constitute by an active connection, upper supporting leg（14）Upper end supreme stay hook is flexibly connected by shaft
（11）, lower supporting leg（15）Lower end lower movable hook is articulated to by shaft（12）And pass through push pull maneuver Controlled mobilization hook
（12）Move up and down；Vertex shaft（16）Connect actuating sleeve（17）, with externally threaded adjusting bolt（30）One end put in
Actuating sleeve（17）It is interior and can be relative to actuating sleeve（17）Rotation, adjusting bolt（30）With actuating sleeve（17）Between it is axially opposing solid
It is fixed, with externally threaded adjusting bolt（30）The other end stretch out housing（13）And and housing（13）Between be threadedly coupled, pass through
Adjusting bolt（30）Rotation Controlled mobilization hook（12）Move up and down.
6. deformation of transformer winding altitude test pincers according to claim 5, it is characterised in that：Lower movable hook（12）After
End puts in buffer pocket（18）It is interior and can be relative to buffer pocket（18）It does along insulating bar（7）Axial movement, buffer pocket（18）
With lantern ring（19）It is fixedly connected, lantern ring（19）It is sleeved on insulating bar（7）It outside and can be relative to insulating bar（7）It does in axial direction
Lower movement；Buffer pocket（18）Inside it is provided with buffer spring（31）, buffer spring（31）Bottom end be fixed on buffer pocket（18）, buffering
Spring（31）The lower movable hook of top connection（12）And in lower movable hook（12）Relative to buffer pocket（18）It is kept under when moving up
Movable hook（12）Downward pulling force.
7. deformation of transformer winding altitude test pincers according to claim 5, it is characterised in that：It is set above line winder
Wire-clamping device is equipped with, which includes fixed bin（20）, gripping block（21）And clamping ring（22）, fixed bin（20）It is fixed on
Insulating bar（7）On, gripping block（21）The wedge-shaped fixture block up big and down small for two pieces, there are for pressing from both sides between two wedge-shaped fixture blocks
The interval of tight electric wire, the mobile sliding block of upper end setting of two wedge-shaped fixture blocks（23）, mobile sliding block（23）Put in horizontal concrete chute（24）
It is interior and can be in horizontal concrete chute（24）Inside laterally move, horizontal concrete chute（24）Rear end be provided with and put in fixed bin（20）Interior cunning
Piece（25）, slide plate（25）With fixed bin（20）Interior back-moving spring（26）Connection, slide plate（25）It can be along fixed bin（20）Middle part
The vertical slide opening of bar shaped（27）It does along insulating bar（7）Axial moves up and down, and works as slide plate（25）Back-moving spring when moving up
（26）It keeps to slide plate（25）Downward pulling force；Gripping block（21）Lower end put in clamping ring（22）It is interior, and in gripping block（21）
Two gripping blocks when westwards moving（21）Gradually clamp electric wire；Clamping ring（22）Upper and two gripping blocks（21）Between interval pair
The position answered is provided with the gap that supply lines is put into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711254418.5A CN108132362B (en) | 2017-12-04 | 2017-12-04 | Transformer winding deformation high-altitude test clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711254418.5A CN108132362B (en) | 2017-12-04 | 2017-12-04 | Transformer winding deformation high-altitude test clamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108132362A true CN108132362A (en) | 2018-06-08 |
| CN108132362B CN108132362B (en) | 2020-05-01 |
Family
ID=62389121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711254418.5A Active CN108132362B (en) | 2017-12-04 | 2017-12-04 | Transformer winding deformation high-altitude test clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108132362B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077349A (en) * | 2019-10-17 | 2020-04-28 | 国家电网有限公司 | High-altitude test clamp for distribution network transformer and distribution network transmission line |
| CN112147072A (en) * | 2020-08-31 | 2020-12-29 | 广东电网有限责任公司广州供电局 | Auxiliary device for electrical maintenance |
| CN112305276A (en) * | 2020-10-29 | 2021-02-02 | 国家电网有限公司 | Multifunctional high-voltage test wire for transformer test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077349A (en) * | 2019-10-17 | 2020-04-28 | 国家电网有限公司 | High-altitude test clamp for distribution network transformer and distribution network transmission line |
| CN112147072A (en) * | 2020-08-31 | 2020-12-29 | 广东电网有限责任公司广州供电局 | Auxiliary device for electrical maintenance |
| CN112305276A (en) * | 2020-10-29 | 2021-02-02 | 国家电网有限公司 | Multifunctional high-voltage test wire for transformer test |
| CN112305276B (en) * | 2020-10-29 | 2023-07-14 | 国家电网有限公司 | Multifunctional high-voltage test wire for transformer test |
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| CN108132362B (en) | 2020-05-01 |
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