CN108427091A - Current transformer error calibration equipment - Google Patents
Current transformer error calibration equipment Download PDFInfo
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- CN108427091A CN108427091A CN201810640314.6A CN201810640314A CN108427091A CN 108427091 A CN108427091 A CN 108427091A CN 201810640314 A CN201810640314 A CN 201810640314A CN 108427091 A CN108427091 A CN 108427091A
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- current transformer
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- arm
- calibrating installation
- cuts
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- 238000009434 installation Methods 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 2
- 230000000630 rising effect Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 16
- 238000002474 experimental method Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention provides a kind of current transformer error calibration equipments, are related to current transformer error Calibration Technology field, the current transformer error calibration equipment, including:Walking mechanism, driving device and calibrating installation, calibrating installation with current transformer to be measured for connecting;Calibrating installation is connect by driving device with walking mechanism, so that walking mechanism drives calibrating installation movement;Walking mechanism includes carriage body, and opening is provided on carriage body outer wall, and driving device so that calibrating installation is stretched out out of carriage body, or is recovered in carriage body for driving calibrating installation to be moved along opening direction.Repeater's power can be avoided to carry using this equipment, the field connection between device and device can greatly reduce working strength, improve working efficiency, reduce power off time, meanwhile, equipment is played a certain protective role.
Description
Technical field
The present invention relates to current transformer error Calibration Technology fields, are examined and determine more particularly, to a kind of current transformer error
Equipment.
Background technology
The error of current transformer is determined by the performance of the structure and material of iron core, i.e., is cut with the length of magnetic path, iron core
Face is related with magnetic permeability, related with the number of turns of coil and resistance, the size of secondary load and load power factor angle.Than poor, angle
Difference and iron core magnetic permeability and the number of turns of sectional area, secondary coil square are inversely proportional, with the length of magnetic path and secondary coil impedance, two
Secondary load is directly proportional, and is influenced by secondary load power-factor angle and core loss angle.Cause the outer of current transformer error
Boundary's condition has:Primary current, supply frequency, secondary load impedence (including contact resistance), iron core remanent magnetism, external magnetic field and warm and humid
Degree influence etc..
The current transformer majority that power plant and substation field use belongs to installing type equipment, can not withdraw scene, meter
Amount error testing experiment must be carried out at the scene.Traditional current mutual inductor field detecting experiment uses standard current transformer ratio
Compared with method, needed current lifting device, standard current transformer, pressure regulator, mutual-inductor tester, load when experiment every time through manpower
Case, test lead etc. carry Truck, after arriving at test site, then build testing ground in vacant lot temporarily, a large amount of manpower is removed
Fortune, handling, attaching line obtain that the work of live ct calibrating is heavy, and labor intensity is high, carry out the work when meeting severe winter heat, extremely examine
Test personnel's fitness.
Conventional on-site calibration method working efficiency is low, time-consuming and laborious, installs the examination that has a power failure for a long time caused by wiring
It tests, brings the loss of economic benefit.In terms of safety, since field device distribution is mixed and disorderly, during experiment, attaching line is very
Complexity is easy that human error, equipment is brought to load and unload repeatedly, carry, are easy to damage equipment during wiring, and there are equipment, people
The security risk of body.
Invention content
The purpose of the present invention is to provide a kind of current transformer error calibration equipments, to alleviate in existing verification process
Equipment needs the technical issues of repeating to split with installation.
A kind of current transformer error calibration equipment provided in an embodiment of the present invention, including:Walking mechanism, driving device and
Calibrating installation, the calibrating installation with current transformer to be measured for connecting;
The calibrating installation is connect by the driving device with the walking mechanism, so that the walking mechanism drives institute
State calibrating installation movement;
The walking mechanism includes carriage body, opening is provided on the carriage body outer wall, the driving device is for driving institute
It states calibrating installation to move along the opening direction, so that the calibrating installation is stretched out out of described carriage body, or be recovered to described
In carriage body.
Further, the opening is positioned at the top surface of the carriage body;The driving device includes pedestal, slideway, first cuts
Arm, second cut arm, support platform and hydraulic mechanism;
The slideway is located on the pedestal, and described first cuts that the lower end of arm is hinged with pedestal, and described second cuts under arm
It is provided with pulley corresponding with the slideway on end, described first, which cuts arm, cuts that arm is hinged, and described first cuts arm with described second
Upper end and second cut arm upper end connect with the support platform;
The hydraulic mechanism includes hydraulic cylinder, and described hydraulic cylinder one end is hinged with pedestal, and the other end and described first cuts arm
Or second cut arm connection, cuts arm and second for adjusting described first and cuts angle between arm, so that in the support platform
It rises or declines.
Further, be correspondingly arranged on locking structure between the slideway and the pulley so that described first cut arm with
Second, which cuts arm angle, fixes.
Further, the opening is provided with stop mechanism, and the stop mechanism includes cover board, the cover board with it is described
Carriage body is flexibly connected, so that the cover board can block the opening.
Further, the calibrating installation includes current lifting device and standard current transformer;
The current transformer error calibration equipment includes switch board, and regulator and verification are provided in the switch board
Device, the switch board are connect with the calibrating installation;The calibration equipment examines and determine data for recording error.
Further, the carriage body includes equipment compartment and control storehouse, and switch board is located in the control storehouse, the driving dress
It sets and is located in the equipment compartment with calibrating installation;
It is provided with partition board between the equipment compartment and control storehouse, and watch window is provided on the partition board.
Further, it is provided with earthing or grounding means in the equipment compartment.
Further, it is provided with the ladder for being communicated to carriage body top surface on the side wall of the carriage body;
The top surface of the carriage body is provided with fence;
The material of the support platform is insulating materials.
Further, it is provided with lighting device on the top surface of the carriage body.
Further, it is provided with refrigerating plant in the control storehouse, for reducing the temperature in control storehouse.
The embodiment of the present invention brings following advantageous effect:
Current transformer error calibration equipment provided in an embodiment of the present invention, including:Walking mechanism, driving device and calibrating
Device, the calibrating installation with current transformer to be measured for connecting.The calibrating installation by the driving device with it is described
Walking mechanism connects, so that the walking mechanism drives the calibrating installation movement.The walking mechanism includes carriage body, the compartment
Opening is provided on external wall, the driving device is for driving the calibrating installation to be moved along the opening direction, so that institute
It states calibrating installation to stretch out out of described carriage body, or is recovered in the carriage body.Current transformer provided in an embodiment of the present invention
Error testing equipment in use, can be moved to beside current transformer to be measured by walking mechanism, then will calibrating
Device is stretched out out of carriage body, reduces the influence that larger work calibrating electric current generates walking mechanism, then by calibrating installation and
Current transformer connection to be measured, carries out error testing.Repeater's power can be avoided to carry using this equipment, device and device it
Between field connection, can greatly reduce working strength, improve working efficiency, reduce power off time, meanwhile, one is played to equipment
Fixed protective effect.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the signal when calibrating installation for the current transformer error calibration equipment that the embodiment of the present invention 1 provides stretches out
Figure;
Fig. 2 is the signal when calibrating installation for the current transformer error calibration equipment that the embodiment of the present invention 1 provides is withdrawn
Figure;
Fig. 3 is the schematic diagram for the current transformer error calibration equipment that the embodiment of the present invention 2 provides;
Fig. 4 is the schematic diagram for the current transformer error calibration equipment that the embodiment of the present invention 3 provides.
Icon:110- equipment compartments;120- controls storehouse;210- pedestals;220- support platforms;230- hydraulic mechanisms;300- is covered
Plate;410- current lifting devices;420- standard current transformers;500- switch boards;600- earthing or grounding means;710- ladders;720- fences;
810- lighting devices;820- refrigerating plants;900- telescopic support legs.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that such as occur term "center", "upper", "lower", "left", "right",
The orientation or positional relationship of "vertical", "horizontal", "inner", "outside" etc., instruction is that orientation based on ... shown in the drawings or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, not indicating or implying the indicated device or element must have
Specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, such as there is art
Language " first ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " connected " " connects
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected;It can be machine
Tool connects, and can also be electrical connection;It can be directly connected, can also can be indirectly connected through an intermediary two members
Connection inside part.For the ordinary skill in the art, it can understand above-mentioned term in the present invention with concrete condition
Concrete meaning.
The present invention provides a kind of current transformer error calibration equipments, and multiple embodiments are given below and provide the present invention
The structure of current transformer error calibration equipment be described in detail.
Embodiment 1
As shown in Figs. 1-2, current transformer error calibration equipment provided in an embodiment of the present invention, including:Walking mechanism is (not
Draw), driving device and calibrating installation, the calibrating installation with current transformer to be measured for connecting.The calibrating installation is logical
It crosses the driving device to connect with the walking mechanism, so that the walking mechanism drives the calibrating installation movement.The row
Include carriage body into mechanism, opening is provided on the carriage body outer wall, the driving device is for driving the calibrating installation along institute
Opening direction movement is stated, so that the calibrating installation is stretched out out of described carriage body, or is recovered in the carriage body.The present invention is real
The current transformer error calibration equipment for applying example offer in use, it is mutual electric current to be measured can be moved to by walking mechanism
Beside sensor, then calibrating installation is stretched out out of carriage body, reduces the shadow that larger work calibrating electric current generates walking mechanism
It rings, then connect calibrating installation with current transformer to be measured, carry out error testing.Repeater can be avoided using this equipment
Power is carried, the field connection between device and device, can greatly reduce working strength, improves working efficiency, when reducing power failure
Between, meanwhile, equipment is played a certain protective role.
Walking mechanism may include wheel and the motor of driving wheel rotation.
In the scheme implemented at one, opening is positioned at the top surface of the carriage body.Driving device can be shearing type lifting device,
Driving device includes pedestal 210, slideway, first cuts arm, second cuts arm, support platform 220 and hydraulic mechanism 230.Slideway is located at
On the pedestal 210, described first to cut the lower end of arm hinged with pedestal 210, and described second cuts and be provided on the lower end of arm and institute
State the corresponding pulley of slideway, described first, which cuts arm, cuts that arm is hinged, and described first, which cuts the upper end of arm and second, cuts arm with described second
Upper end connect with the support platform 220;The hydraulic mechanism 230 includes hydraulic cylinder, described hydraulic cylinder one end and pedestal
210 is hinged, and the other end cuts arm with described first or second cuts arm and connect.After hydraulic cylinder elongation, first, which cuts arm and second, cuts arm
Between angle reduce, support platform 220 moves to opening upward, can guarantee safe distance needed for experiment, and facilitate experiment
Wiring;And after hydraulic cylinder is retracted, first, which cuts arm and second, cuts angle between arm and increases, and support platform 220 declines, and falls back to
In carriage body.
Be correspondingly arranged on locking structure between slideway and the pulley so that described first cut arm and second cut arm institute at folder
Angle is fixed.For example, locking structure may include pin and pin hole, pin is located on pulley, and pin hole is located on slideway, when support is flat
Platform 220 moves to opening, and calibrating installation examines and determine current transformer, at this point, pin is inserted into pin hole, keeps support
Platform 220 is steady.
Opening is provided with stop mechanism, and the stop mechanism includes cover board 300, and the cover board 300 is lived with the carriage body
Dynamic connection, so that the cover board 300 can block the opening.Stop mechanism can also include motor, and motor connects with cover board 300
It connects, is exposed for driving the capping opening of cover board 300, or by opening.
For example, cover board 300 and opening edge edge are hinged.Before support platform 220 is lifted up, cover board 300 flips outward, will
Opening is exposed, and after testing, support platform 220 is fallen back in carriage body, and cover board 300 turns to returning, by closure of openings.It is anti-
Only rainwater enters carriage body by opening.
Cover board 300 and the top plate of carriage body are slidably connected, cover board 300 can the planar slide where opening, to make opening
Exposure or closing.
Specifically, calibrating installation includes current lifting device 410 and standard current transformer 420.Current transformer error calibrating is set
Standby includes switch board 500, and regulator and calibration equipment are provided in switch board 500, and switch board 500 connects with the calibrating installation
It connects;The calibration equipment examines and determine data for recording error.After support platform 220 rises to car top and safe spacing, experiment
Personnel carry out wiring, after call through test power supply, be arranged calibration equipment test parameters, control regulator start to flow up, school
Experiment device recording error examines and determine data
Carriage body includes equipment compartment 110 and control storehouse 120, and switch board 500 is located in the control storehouse 120, the driving dress
It sets and is located in the equipment compartment 110 with calibrating installation.It is provided with partition board, and the partition board between equipment compartment 110 and control storehouse 120
On be provided with watch window, when experiment, testing crew passes through the situation in watch window observation device storehouse 110, and the outer personnel of vehicle see
Examine car top up-flow situation.
Earthing or grounding means 600 is provided in equipment compartment 110.Earthing or grounding means 600 electrically connects composition between equipment compartment 110 and ground
The equipment connect.Earthing or grounding means 600 is made of earthing pole, earth bus, down conductor, framework ground connection.It is used to realize electricity
The purpose that gas system is connected with the earth.It is earthing pole with the metal object for realizing electrical connection is greatly in direct contact.
Further, the ladder 710 for being communicated to carriage body top surface is provided on the side wall of carriage body, testing crew passes through ladder
710 climb to car top, and calibrating installation is connect with current transformer to be measured.The top surface of carriage body is provided with fence 720, in order to anti-
Only the testing crew of car top is surprisingly dropped.Because when calibrating, needing to use larger electric current, electric current is along drive in order to prevent
Dynamic device conduction, so the material of support platform 220 is insulating materials.
Further, in order to facilitate night time operation, lighting device 810 is provided on the top surface of carriage body.Lighting device 810 can
To include holder and lamp body, to be flexibly connected between holder and lamp body, the light emitting angle so as to be lamp body is adjustable.
Further, it is provided with refrigerating plant 820 in the control storehouse 120, for reducing the temperature in control storehouse 120.
Experimenter and switch board 500 are all located in control storehouse 120, and refrigerating plant 820 can provide comfortable work for experimenter
Environment, while switch board 500 can also be given to cool down, be conducive to radiate.
Embodiment 2
As shown in figure 3, difference from Example 1 is, driving device may include pedestal 210,220 and of support platform
Hydraulic mechanism 230, the hydraulic mechanism 230 include multiple hydraulic pressure support bars, and multiple hydraulic pressure support bars are located at pedestal 210 and support
Between platform 220, more hydraulic pressure support bars extend simultaneously, can promote support platform 220.
Embodiment 3
As shown in figure 4, the difference is that, opening can be arranged on the side wall of carriage body with Examples 1 and 2, driving dress
The laterally moved out carriage body of calibrating installation can be driven by setting.
Specifically, driving device may include sliding rail and support platform 220, sliding rail is fixed on the bottom surface of carriage body, and support is flat
Platform 220 is slidably connected with sliding rail, immobilization of assay device in support platform 220, for calibrating installation to be skidded off carriage body.
It is hinged with telescopic support legs 900 on the bottom surface of support platform 220, after support platform 220 skids off carriage body, stretches
Support leg 900 can be abutted with bottom surface, ensure the stabilization of support platform 220.
In conclusion current transformer error calibration equipment provided in an embodiment of the present invention, including:Walking mechanism, driving
Device and calibrating installation, driving device can be laterally driven, or vertical driving, the calibrating installation be used for it is to be measured
Current transformer connects.The calibrating installation is connect by the driving device with the walking mechanism, so that the traveling machine
Structure drives the calibrating installation movement.The walking mechanism includes carriage body, and opening, the driving are provided on the carriage body outer wall
Device is for driving the calibrating installation to be moved along the opening direction, so that the calibrating installation is stretched out out of described carriage body,
Or it is recovered in the carriage body.Equipment is an entirety, and multiple independent calibrating installations, which transport, in being different from the prior art reaches
The mode assembled again after to destination, reduces time.Current transformer error calibrating provided in an embodiment of the present invention is set
It is standby to be moved in use by walking mechanism beside current transformer to be measured, then by calibrating installation from carriage body
Interior stretching reduces the influence that larger work calibrating electric current generates walking mechanism, then that calibrating installation and electric current to be measured is mutual
Sensor connects, and carries out error testing.Repeater's power can be avoided to carry using this equipment, the scene between device and device connects
Line can greatly reduce working strength, improve working efficiency, reduce power off time, meanwhile, certain protection is played to equipment and is made
With.
Finally it should be noted that:Embodiment described above, only specific implementation mode of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that:Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features;And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of current transformer error calibration equipment, which is characterized in that including:Walking mechanism, driving device and calibrating installation,
The calibrating installation with current transformer to be measured for connecting;
The calibrating installation is connect by the driving device with the walking mechanism, so that the walking mechanism drives the inspection
Determine device movement;
The walking mechanism includes carriage body, opening is provided on the carriage body outer wall, the driving device is for driving the inspection
Determine device to move along the opening direction, so that the calibrating installation is stretched out out of described carriage body, or is recovered to the carriage body
It is interior.
2. current transformer error calibration equipment according to claim 1, which is characterized in that the opening is located at the compartment
The top surface of body;The driving device includes pedestal, slideway, first cuts arm, second cuts arm, support platform and hydraulic mechanism;
The slideway is located on the pedestal, and described first cuts that the lower end of arm is hinged with pedestal, and described second cuts on the lower end of arm
It is provided with pulley corresponding with the slideway, described first, which cuts arm, cuts that arm is hinged, and described first cuts the upper end of arm with described second
The upper end that arm is cut with second is connect with the support platform;
The hydraulic mechanism includes hydraulic cylinder, and described hydraulic cylinder one end and pedestal are hinged, the other end with described first cut arm or
Second cuts arm connection, cuts arm and second for adjusting described first and cuts angle between arm so that the support platform rise or
Person declines.
3. current transformer error calibration equipment according to claim 2, which is characterized in that the slideway and the pulley
Between be correspondingly arranged on locking structure so that described first cuts arm and cuts arm angle with second and fix.
4. current transformer error calibration equipment according to claim 1, which is characterized in that the opening is provided with only
Retaining device, the stop mechanism include cover board, and the cover board is flexibly connected with the carriage body, so that the cover board can block institute
State opening.
5. current transformer error calibration equipment according to claim 1, which is characterized in that the calibrating installation includes rising
Flow device and standard current transformer;
The current transformer error calibration equipment includes switch board, and regulator is provided in the switch board and verification fills
It sets, the switch board is connect with the calibrating installation;The calibration equipment examines and determine data for recording error.
6. current transformer error calibration equipment according to claim 5, which is characterized in that the carriage body includes equipment compartment
With control storehouse, switch board is located in the control storehouse, and the driving device and calibrating installation are located in the equipment compartment;
It is provided with partition board between the equipment compartment and control storehouse, and watch window is provided on the partition board.
7. current transformer error calibration equipment according to claim 6, which is characterized in that be provided in the equipment compartment
Earthing or grounding means.
8. current transformer error calibration equipment according to claim 2, which is characterized in that set on the side wall of the carriage body
It is equipped with the ladder for being communicated to carriage body top surface;
The top surface of the carriage body is provided with fence;
The material of the support platform is insulating materials.
9. current transformer error calibration equipment according to claim 1, which is characterized in that set on the top surface of the carriage body
It is equipped with lighting device.
10. current transformer error calibration equipment according to claim 6, which is characterized in that be arranged in the control storehouse
There is refrigerating plant, for reducing the temperature in control storehouse.
Priority Applications (1)
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CN201810640314.6A CN108427091A (en) | 2018-06-21 | 2018-06-21 | Current transformer error calibration equipment |
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CN201810640314.6A CN108427091A (en) | 2018-06-21 | 2018-06-21 | Current transformer error calibration equipment |
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Cited By (4)
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CN110907877A (en) * | 2019-11-13 | 2020-03-24 | 宁波荣集锦科技有限公司 | Current transformer production detection device |
CN112763961A (en) * | 2021-01-06 | 2021-05-07 | 南京能晶电子科技有限公司 | Hall current sensor chip error correction equipment and method thereof |
CN113589221A (en) * | 2021-09-27 | 2021-11-02 | 武汉磐电科技股份有限公司 | Current transformer detection vehicle with high-altitude operation system |
CN114755470A (en) * | 2022-04-07 | 2022-07-15 | 江苏靖江互感器股份有限公司 | Current transformer production detection device |
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