CN109244912A - 10kV intermediate switchgear cabinet current transformer replaces specific purpose tool - Google Patents
10kV intermediate switchgear cabinet current transformer replaces specific purpose tool Download PDFInfo
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- CN109244912A CN109244912A CN201811277552.1A CN201811277552A CN109244912A CN 109244912 A CN109244912 A CN 109244912A CN 201811277552 A CN201811277552 A CN 201811277552A CN 109244912 A CN109244912 A CN 109244912A
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- support column
- current transformer
- fixedly installed
- mid
- replacing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
本发明涉及电流互感器更换工具技术领域，提供10kV中置式开关柜电流互感器更换专用工具，包括底座，底座上固定安装有升降机构，升降机构上固定安装有第一支撑柱，第一支撑柱上转动安装有用于拆装电流互感器的紧固机构，紧固机构与第一支撑柱之间连接有用于支撑紧固机构的支撑杆。本发明解决了传统的更换方式需要电力人员手动搬着电流互感器进行拆卸，工作劳动强度大，操作不方便，容易出现安全事故的技术问题。
The invention relates to the technical field of current transformer replacement tools, and provides a special tool for current transformer replacement of 10kV mid-mounted switchgear, comprising a base, a lifting mechanism is fixedly installed on the base, a first support column is fixedly installed on the lifting mechanism, and the first support column A fastening mechanism for dismounting and assembling a current transformer is rotatably installed on the upper part, and a supporting rod for supporting the fastening mechanism is connected between the fastening mechanism and the first supporting column. The invention solves the technical problems that the traditional replacement method requires electric personnel to manually carry the current transformer for disassembly, the work is labor-intensive, the operation is inconvenient, and safety accidents are prone to occur.
Description
Technical field
The present invention relates to current transformer replacement technical field of tools more particularly to 10kV intermediate switchgear cabinet Current Mutual Inductances
Device replaces specific purpose tool.
Background technique
The size of current great disparity in the route of power generation, power transformation, transmission of electricity, distribution and electricity consumption has from several peaces to tens of thousands of Andu, is
Convenient for measurement, protection and control, need to be converted to the unified electric current of comparison, in addition the voltage on route is generally relatively high, such as
Fruit directly measure be it is breakneck, for the measurement electric current of safety, current transformer comes into being, and current transformer mainly rises
Current transformation and electrical isolation effect are arrived.
But with the rapid development of economy, people are also increasing for the demand of electricity consumption, powering for power grid can
Required by property it is also higher and higher, in the case where growing power demand, current transformer that traditional switchgear uses
It can no longer meet the demand of residential electricity consumption, in order to guarantee power system security reliability service, need replacing the bigger electricity of capacity
Current transformer.
In the actual replacement process of current transformer, inventor has found existing substitute mode, and there is also following defects:
Traditional substitute mode is to remove current transformer manually after turning on the switch cabinet door by electric power personnel and carry out bolt simultaneously
Dismantlement work a people can only be allowed to operate since space is limited in switchgear, since current transformer weight is larger,
Therefore, in replacement, the labor intensity of electric power personnel is big, inconvenient for operation, is easy to appear safety accident.
Therefore, exploitation 10kV intermediate switchgear cabinet current transformer replaces specific purpose tool, not only has urgent research valence
Value, it may have good economic benefit and commercial application potentiality, where this power exactly of the invention being accomplished and basis.
Summary of the invention
In order to overcome the defect of the prior art as indicated above, the present inventor has made intensive studies this, is paying
After a large amount of creative works, so as to complete the present invention.
Specifically, the technical problems to be solved by the present invention are: providing 10kV intermediate switchgear cabinet current transformer more
Specific purpose tool is changed, needs electric power personnel to remove current transformer manually to solve traditional substitute mode and dismantles, work labor
The technical issues of fatigue resistance is big, inconvenient for operation, is easy to appear safety accident.
In order to solve the above technical problems, the technical scheme is that
10kV intermediate switchgear cabinet current transformer replaces specific purpose tool, including pedestal, is fixedly installed on the pedestal
Elevating mechanism is fixedly installed with the first support column on the elevating mechanism, is rotatably equipped on first support column for tearing open
The retention mechanism for filling current transformer, is connected between the retention mechanism and first support column and is used to support retention mechanism
Support rod.
As an improvement scheme, the bottom of the pedestal is equipped with the bit-avoiding slot for keeping away bit switch cabinet under(-)chassis.
As an improvement scheme, the elevating mechanism is using foot-operated hydraulic pump, the cylinder of the foot-operated hydraulic pump
Body is fixedly installed on the pedestal, and the piston rod of the foot-operated hydraulic pump is fixedly connected with first support column.
As an improvement scheme, the retention mechanism includes the second support column, second support column and described the
One end that one support column is connected is fixedly installed with a shaft, and the shaft and first support column are rotatablely installed, described
Two are fixedly installed on second support column for the fixed links that are fixedly connected with current transformer, in two fixed links
The fastening bolt to match equipped with the threaded hole of several and current transformer.
As an improvement scheme, one end of the shaft extends first support column and forms elongated end, institute
It states and is fixedly installed with a handwheel on elongated end.
As an improvement scheme, a sliding block is slidably fitted on second support column, one end of the sliding block is solid
Surely it is connected with the pushing mechanism for pushing sliding block to slide, the pushing mechanism is fixedly installed on second support column, institute
The one end for stating sliding block and the support rod is articulated and connected, and the other end of the support rod is hingedly connected with a fixing seat, described solid
Reservation is fixedly installed on first support column.
As an improvement scheme, the pushing mechanism is using electric drive hydraulic thruster, the electric drive hydraulic thruster
Piston rod be fixedly connected with the sliding block, the cylinder body of the electric drive hydraulic thruster is fixedly installed on second support column,
The cylinder body of the electric drive hydraulic thruster is connected with control switch by conducting wire, and the control switch passes through the detachable installation of card slot
In the cylinder surface of the foot-operated hydraulic pump.
As an improvement scheme, offer T-shape sliding slot on second support column, the sliding block is also in T-shape
Structure, the sliding block are adapted with the T-shape sliding slot, and are slidably mounted in the T-shape sliding slot.
As an improvement scheme, one end that first support column is connected with second support column be equipped be used for
The baffle of the second support column rotational angle is limited, the baffle and the fixed link are located at the same side.
As an improvement scheme, battery is fixedly installed on the pedestal, the battery passes through conducting wire and connects
The control switch.
To need electric power personnel to remove electric current manually mutual through the above technical solutions, solving traditional substitute mode by the present invention
The technical issues of sensor is dismantled, and labor intensity is big, inconvenient for operation, is easy to appear safety accident.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of vertical state of the present invention；
Fig. 2 is schematic view of the front view of the invention；
Fig. 3 is side structure schematic view of the invention；
Fig. 4 is the structural schematic diagram of horizontality of the present invention；
Fig. 5 is present invention slider structural schematic diagram；
Wherein, each number designation is respectively referred to for following concrete meaning, element and/or component in the figure.
In figure: 1, pedestal, 101, bit-avoiding slot, 2, elevating mechanism, 201, foot-operated hydraulic pump, 2011, the cylinder of foot-operated hydraulic pump
Body, 2012, the piston rod of foot-operated hydraulic pump, the 3, first support column, 4, retention mechanism, the 401, second support column, 402, shaft,
403, fixed link, 404, fastening bolt, 405, handwheel, 406, sliding block, 407, pushing mechanism, 4071, electric drive hydraulic thruster,
4072, the piston rod of electric drive hydraulic thruster, 4073, the cylinder body of electric drive hydraulic thruster, 408, fixing seat, 409, T-shape sliding slot,
410, baffle, 5, support rod, 6, current transformer, 601, the threaded hole of current transformer, 7, control switch, 8, card slot, 9, store
Battery, 10, handrail.
Specific embodiment
Below with reference to specific embodiment, the present invention is further described.But the purposes and mesh of these exemplary embodiments
Be only used to enumerate the present invention, any type of any restriction not is constituted to real protection scope of the invention, it is more non-to incite somebody to action this
The protection scope of invention is confined to this.
As shown in Figure 1 and Figure 4, it includes pedestal 1, pedestal 1 that 10kV intermediate switchgear cabinet current transformer 6, which replaces specific purpose tool,
On be fixedly installed with elevating mechanism 2, the first support column 3 is fixedly installed on elevating mechanism 2, is rotatablely installed on the first support column 3
There is the retention mechanism 4 for dismounting current transformer 6, is connected between retention mechanism 4 and the first support column 3 and is used to support fastening
The support column of mechanism 4.
In the present embodiment, in conjunction with shown in Fig. 1 and Fig. 4,10kV intermediate switchgear cabinet current transformer 6 replaces specific purpose tool packet
Pedestal 1 is included, the effect of pedestal 1 is to carry whole device, and the material of pedestal 1 increases the weight of pedestal 1 using cast iron,
Enhance the stability of whole device, is bolted on pedestal 1 and elevating mechanism 2 is installed, the effect of elevating mechanism 2 is can
To adjust the height that 10kV intermediate switchgear cabinet current transformer 6 replaces specific purpose tool, make electric power personnel in replacement Current Mutual Inductance
It is more convenient when device 6, work more comfortable, slow down work fatigue, on elevating mechanism 2 in such a way that bolt either welds with
First support column 3 is fixedly connected, and in the present embodiment, using the mode of welding, increases the stability of connection, the first support column
3 effect is carrying retention mechanism 4, is rotatably equipped with retention mechanism 4 on the first support column 3, the effect of retention mechanism 4 is
It can be fixed by bolt and the current transformer 6 in switchgear, and securing current transformer 6 is turned into level
Direction facilitates electric power personnel to replace, and support column, the effect of support column are connected between retention mechanism 4 and the first support column 3
It is to play the role of support to retention mechanism 4 when retention mechanism 4 fixes current transformer 6 and rotates to horizontal direction, increases
Add 10kV intermediate switchgear cabinet current transformer 6 to replace the structural strength of specific purpose tool, has kept structure more stable, to sum up institute
It states, replaces electric power personnel to remove electric current manually by using the replacement specific purpose tool of 10kV intermediate switchgear cabinet current transformer 6 mutual
Sensor 6 is dismantled, and the working strength of electric power personnel is reduced, and current transformer 6 is turned to level side by retention mechanism 4
To being dismantled, without being operated in the confined space of switchgear, keeps the operation of electric power personnel more convenient, decrease simultaneously
The generation of safety accident solves traditional substitute mode and electric power personnel is needed to remove electric current manually by using above scheme
The technical issues of mutual inductor 6 is dismantled, and labor intensity is big, inconvenient for operation, is easy to appear safety accident.
In the present embodiment, as shown in connection with fig. 1, the bottom of pedestal 1 is equipped with the bit-avoiding slot for keeping away bit switch cabinet under(-)chassis
101, when in use, the bottom mechanical of pedestal 1 is machined with bit-avoiding slot 101, and the effect of bit-avoiding slot 101 is to open when 10kV middle
When the pass replacement specific purpose tool of cabinet current transformer 6 is transported to the opening of switchgear, the frame in bit switch bottom of cabinet portion can be kept away, is made
10kV intermediate switchgear cabinet current transformer 6 is replaced specific purpose tool and can be horizontally arranged, and the case where run-off the straight is shaken is unlikely to,
Conducive to the stability of whole device.
In the present embodiment, as shown in connection with fig. 1, elevating mechanism 2 rides the cylinder of hydraulic pump using foot-operated hydraulic pump 201
Body 2011 is fixedly installed on pedestal 1, and the piston rod 2012 of foot-operated hydraulic pump is fixedly connected with the first support column 3, when in use,
For elevating mechanism 2 using foot-operated hydraulic pump 201, riding hydraulic pump 201 is that everyday life is common, and belongs to this technology neck
Technical staff's common knowledge in domain, details are not described herein, and it is hydraulic using Dezhou City friend alliance that hydraulic stem is ridden in the present embodiment
The cylinder body 2011 of the foot-operated hydraulic pump 201 of equipment Co., Ltd production, foot-operated hydraulic pump is mounted by means of bolts on pedestal 1
On, it is also fixedly installed with handrail 10, the effect side of being of handrail 10 by welding on the cylinder body 2011 of foot-operated hydraulic pump
Just the mobile whole device of electric power personnel, while in operation, by hand-held handrail 10, can preferably exert oneself, holding meanss
The piston rod 2012 of stability, foot-operated hydraulic pump is fixedly connected by way of bolt or welding with the first support column 3, is passed through
Using foot-operated hydraulic pump 201, electric power personnel be free to adjustment 10kV intermediate switchgear cabinet current transformer 6 and replace special tool
The height of tool facilitates electric power personnel to replace current transformer 6.
In the present embodiment, in conjunction with shown in Fig. 1, Fig. 3 and Fig. 4, retention mechanism 4 includes the second support column 401, the second support column
401 one end being connected with the first support column 3 are fixedly installed with a shaft 402, and shaft 402 and the rotation of the first support column 3 are pacified
It fills, two fixed links 403 for being fixedly connected with current transformer 6, two fixations is fixedly installed on the second support column 401
The fastening bolt 404 that the threaded hole 601 of several and current transformer matches, when in use, fastening machine are equipped on bar 403
Structure 4 includes the second support column 401, and one end that the second support column 401 is connected with the first support column 3 is fixed by welding
One shaft 402 is installed, shaft 402 is rotatablely installed by bearing on the first support column 3, passes through spiral shell on the second support column 401
Bolt is fixedly installed with two fixed links 403, and several threaded holes are offered in two fixed links 403, is equipped in threaded hole tight
Fixing bolt 404, the effect of fixed link 403 are to be connected by fastening bolt 404 with the threaded hole on current transformer 6
It connects, is fixedly mounted on current transformer 6 in fixed link 403, then turn to the position of horizontal plane by the second support column 401
It sets, is moved out to the rotation of current transformer 6 outside switchgear, electric power personnel is facilitated to replace.
In the present embodiment, as shown in connection with fig. 1, one end of shaft 402 extends the first support column 3 and forms elongated end, prolongs
It stretches and is fixedly installed with a handwheel 405 on end, when in use, one end of shaft 402 extends the first support column 3 and forms extension
End, elongated end, which is bolted, is equipped with a handwheel 405, and shaft 402 is fixedly connected with the second support column 401, handwheel 405 and
Shaft 402 is fixedly connected, by handwheel 405 can taking human as the second support column of rotation 401, the second support column 401 is vertical
Direction there are stuck point, make the second support column 401 can not normal rotation, by handwheel 405, electric power personnel can rotate manually
Two support columns 401 allow the second support column 401 smoothly to turn to horizontal position.
In the present embodiment, referring to figure 1 and figure 5, a sliding block 406, sliding block are slidably fitted on the second support column 401
406 one end is fixedly connected with the pushing mechanism 407 for pushing sliding block 406 to slide, and pushing mechanism 407 is fixedly installed in second
On support column 401, one end of sliding block 406 and support rod 5 is articulated and connected, and the other end of support rod 5 is hingedly connected with a fixing seat
408, fixing seat 408 is fixedly installed on the first support column 3, offers T-shape sliding slot 409, sliding block on the second support column 401
406 be also in T-shape structure, and sliding block 406 is adapted with T-shape sliding slot 409, and is slidably mounted in T-shape sliding slot 409, is made
Used time offers T-shape sliding slot 409 on the second support column 401, sliding block 406, sliding block is slidably fitted in T-shape sliding slot 409
406 be also in T-shape structure, and sliding block 406 is adapted with T-shape sliding slot 409, and sliding block 406 can slide in T-shape sliding slot 409,
And will not fall off out, one end of sliding block 406, which is bolted, is equipped with pushing mechanism 407, and pushing mechanism 407 acts on
In pushing sliding block 406 to slide in T-shape sliding slot 409, pushing mechanism 407 is mounted by means of bolts on the second support column 401
On, one end of sliding block 406 and support rod 5 is articulated and connected, and the other end of support rod 5 is hingedly connected with fixing seat 408, fixing seat
408 are fixedly mounted on by welding on the first support column 3, and the effect of support rod 5 is to push away when the elongation of pushing mechanism 407
When movable slider 406 is mobile, support rod 5 can be driven mobile, so that support rod 5 is supported the rotation of the second support column 401, make the second support
Column 401 turns to vertical state by horizontality, facilitates fastening bolt 404 and current transformer 6 in fixed link 403 are fixed to connect
It connects, or when pushing mechanism 407 is shunk, pulls sliding block 406 mobile, and then drive support rod 5 mobile, drive support rod 5
Second support column 401 turns to horizontality by vertical state, realizes the horizontal positioned of current transformer 6.
In the present embodiment, referring to figs. 1 and 2, pushing mechanism 407 is electronic using electric drive hydraulic thruster 4071
The piston rod 4072 of hydraulic push rod is fixedly connected with sliding block 406, and the cylinder body 4073 of electric drive hydraulic thruster is fixedly installed in second
On dagger 401, the cylinder body 4073 of electric drive hydraulic thruster is connected with control switch 7 by conducting wire, and control switch 7 can by card slot 8
Detachable is installed on 2011 surface of cylinder body of foot-operated hydraulic pump, and when in use, pushing mechanism 407 is using electric drive hydraulic thruster
4071, electric drive hydraulic thruster 4071 is that everyday life is common, and belongs to man skilled in the art's common knowledge,
This is repeated no more, and electric drive hydraulic thruster 4071 has the ability that can be protected with starting under load, excess load, meanwhile, electric hydaulic
The push and draw force of push rod 4071 can be run smoothly simultaneously with wireless timing, living when the driving motor of cylinder interior stops working
Stopper rod can be self-locking on certain position, be in pressure maintaining shape body, and the piston rod 4072 of electric drive hydraulic thruster passes through bolt and sliding block
406 are fixedly connected, and the cylinder body of electro-hydraulic push rod is mounted by means of bolts on the second support column 401, and electric hydaulic pushes away
The effect of bar 4071 is that promotion sliding block 406 is mobile, and sliding block 406 and support rod 5 are articulated and connected, and passes through the mobile band of support rod 5
Dynamic second support column 401 rotation, realizes the horizontal positioned of current transformer 6, is provided in the cylinder body 4073 of electric drive hydraulic thruster
Driving motor, driving motor are connected by conducting wire with control switch 7, and the effect of control switch 7 is that controlling electric hydaulic pushes away
The elongation and shortening of bar 4071 ride bolt on the cylinder body 2011 of hydraulic pump and are fixedly installed with card slot 8, and control switch 7 is detachable
Formula is installed in card slot 8, as electric power personnel in use, the use of control switch 7 can be removed from card slot 8 when not used can be
Control switch 7 snaps onto card slot 8, easy to use.
In the present embodiment, in conjunction with shown in Fig. 1 and Fig. 4, one end that the first support column 3 is connected with the second support column 401 is set
There is the baffle 410 for limiting 401 rotational angle of the second support column, baffle 410 and fixed link 403 are located at the same side, are using
When, one end that the first support column 3 is connected with the second support column 401 is provided with a baffle 410, baffle 410 with fixed link 403
In the same side, the effect of baffle 410 is to limit the rotational angle of the second support column 401, makes support column can only be by horizontality
Turn to vertical state, slewing area is 90 degree, as shown in Figure 1 and Figure 4, the second support column 401 is avoided to turn over, cause device without
Method uses.
In the present embodiment, it is fixedly installed with battery 9 as shown in connection with fig. 1, on pedestal, battery 9 is connected by conducting wire and controlled
Switch 7 is made, is bolted when in use, on pedestal and battery 9 is installed, battery 9 passes through conducting wire and 7 phase of control switch
It connects, the effect of battery 9 is to provide energy for electric drive hydraulic thruster 4071, and electric drive hydraulic thruster 4071 is enable to run.
In order to make it easy to understand, following courses of work for providing the embodiment of the present invention:
When in use, the replacement specific purpose tool of 10kV intermediate switchgear cabinet current transformer 6 is transported to designated position first,
It is extended by the piston rod 4072 that control switch 7 controls electric drive hydraulic thruster, piston rod pushes sliding block 406 along the second support column
T-shape sliding slot 409 on 401 slides, and one end of sliding block 406 and support rod 5 is articulated and connected, the other end of support rod 5 and fixation
Seat 408 is articulated and connected, and fixing seat 408 is fixedly mounted on the first support column 3, and the movement of sliding block 406 makes support rod 5 occur to turn
It is dynamic, and then support rod 5 pushes the second support column 401 to rotate around shaft 402, when the second support column 401 is moved by horizontality
When to vertical state, stop motion, as shown in Figure 1, by the screw thread of fastening bolt 404 and current transformer in fixed link 403
Hole 601 is tightened, and then the bolt on current transformer 6 and switchgear rack is unclamped, then controls electronic liquid by control switch 7
Push rod 4071 is pressed to shorten, sliding block 406 of pulling back, sliding block 406 drives support rod 5 to rotate, and then drives the second support column 401 by vertical
State turns to horizontality, as shown in figure 4, in the process, since 10kV intermediate switchgear cabinet current transformer 6 is replaced specially
It is stuck point in vertical state with tool, electric drive hydraulic thruster 4071 can not make sliding block 406 that support rod 5 be driven to rotate, need
Electric power personnel rotate handwheel 405 manually, and the second support column 401 is rotated from vertical state toward horizontality, is pushed away in electric hydaulic
Under the contraction of bar 4071, the second support column 401 turns to horizontality, and then current transformer 6 is driven to turn to horizontality,
Electric power personnel can adjust the height of the second support column 401 by riding hydraulic pump 201, keep work more comfortable, work as electric current
After mutual inductor 6 has been replaced, above-mentioned movement is repeated, the second support column 401 is turned into vertical state by horizontality again, will be opened
The bolt closed on cabinet-type air conditioner frame is tightened with current transformer 6 again, the fastening bolt 404 in fixed link 403 is then unclamped, by 10kV
Intermediate switchgear cabinet current transformer 6 is replaced specific purpose tool and is removed, and current transformer 6 can be completed and more change jobs.
It can to sum up obtain, the present invention through the foregoing embodiment, solves traditional substitute mode and electric power personnel is needed to remove manually
Current transformer 6 dismantled, labor intensity is big, inconvenient for operation, the technical issues of being easy to appear safety accident.
It should be appreciated that the purposes of these embodiments is merely to illustrate the present invention and is not intended to limit protection model of the invention
It encloses.In addition, it should also be understood that, after reading the technical contents of the present invention, those skilled in the art can make the present invention each
Kind change, modification and/or variation, all these equivalent forms equally fall within guarantor defined by the application the appended claims
Within the scope of shield.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811277552.1A CN109244912B (en) | 2018-10-30 | 2018-10-30 | Special tool for replacing current transformer of 10kV middle-mounted switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811277552.1A CN109244912B (en) | 2018-10-30 | 2018-10-30 | Special tool for replacing current transformer of 10kV middle-mounted switch cabinet |
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| Publication Number | Publication Date |
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| CN109244912A true CN109244912A (en) | 2019-01-18 |
| CN109244912B CN109244912B (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811277552.1A Active CN109244912B (en) | 2018-10-30 | 2018-10-30 | Special tool for replacing current transformer of 10kV middle-mounted switch cabinet |
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| CN113030838A (en) * | 2021-03-25 | 2021-06-25 | 河南省计量科学研究院 | Electric energy meter calibrating installation of online area load examination |
| CN113422298A (en) * | 2021-06-21 | 2021-09-21 | 大航有能电气有限公司 | Automatic high-efficient installation device of current transformer |
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| CN115483636A (en) * | 2022-10-08 | 2022-12-16 | 国网山东省电力公司淄博供电公司 | Special tool for replacing current transformer in switch cabinet |
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| CN118919226A (en) * | 2024-09-26 | 2024-11-08 | 华强诚信(天津)电器有限公司 | Electronic voltage transformer |
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| CN113030838A (en) * | 2021-03-25 | 2021-06-25 | 河南省计量科学研究院 | Electric energy meter calibrating installation of online area load examination |
| CN113030838B (en) * | 2021-03-25 | 2024-02-02 | 河南省计量科学研究院 | Electric energy meter calibrating device for on-line on-load calibration |
| CN113422298A (en) * | 2021-06-21 | 2021-09-21 | 大航有能电气有限公司 | Automatic high-efficient installation device of current transformer |
| CN113794141A (en) * | 2021-09-30 | 2021-12-14 | 海南电网有限责任公司海南输变电检修分公司 | Tool for overhauling 10kV switch cabinet current transformer |
| CN115483636A (en) * | 2022-10-08 | 2022-12-16 | 国网山东省电力公司淄博供电公司 | Special tool for replacing current transformer in switch cabinet |
| CN118919226A (en) * | 2024-09-26 | 2024-11-08 | 华强诚信(天津)电器有限公司 | Electronic voltage transformer |
| CN118919226B (en) * | 2024-09-26 | 2025-01-17 | 华强诚信(天津)电器有限公司 | Electronic voltage transformer |
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| CN109244912B (en) | 2020-04-17 |
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