CN205789380U - Intelligent gas-filling cabinet punching electronic current mutual inductor - Google Patents
Intelligent gas-filling cabinet punching electronic current mutual inductor Download PDFInfo
- Publication number
- CN205789380U CN205789380U CN201620449989.9U CN201620449989U CN205789380U CN 205789380 U CN205789380 U CN 205789380U CN 201620449989 U CN201620449989 U CN 201620449989U CN 205789380 U CN205789380 U CN 205789380U
- Authority
- CN
- China
- Prior art keywords
- mutual inductor
- current mutual
- electronic current
- iron core
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004080 punching Methods 0.000 title claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910000889 permalloy Inorganic materials 0.000 claims abstract description 20
- 239000013307 optical fiber Substances 0.000 claims abstract description 12
- 239000003292 glue Substances 0.000 claims abstract description 10
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 14
- 230000005291 magnetic effect Effects 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 229920006351 engineering plastic Polymers 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 8
- 238000004804 winding Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000011162 core material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005350 ferromagnetic resonance Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 210000001215 vagina Anatomy 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model discloses a kind of intelligent gas-filling cabinet punching electronic current mutual inductor, including shell, sealed silicon rubber AB glue, sealed silicon rubber AB glue is filled in the centre of R type permalloy iron core and Luo-coil and housing；R type permalloy iron core and Luo-coil are arranged on the centre of electronic current mutual inductor main body；Air China's aviation terminal is arranged on the secondary outgoing line end of electronic current mutual inductor；Optical fiber one end is connected with Air China aviation terminal, and the other end is connected with combining unit；Described combining unit is arranged on the afterbody of electronic current mutual inductor, does synchronization merging treatment for the signal transmitting each phase far-end.This utility model noise is low, low cost, install and use simple and convenient, operation is not required to safeguard, lightweight, precision is high, good linearity, measurement wide ranges, the shortcomings such as narrow, the low-response of frequency band overcoming conventional electromagnetic current transformer, enhance the ability of electromagnetism interference, are the vitals in intelligent grid digital transformer substation.
Description
Technical field
This utility model belongs to digital intelligent Substation Automation System field, particularly relates to one
Intelligent gas-filling cabinet punching electronic current mutual inductor.
Background technology
Conventional electromagnetic current transformer is that primary side is connected across between high-voltage fence bus and ground, and secondary side is connected on power
On table, kilowatt-hour meter and mechanical and electrical protection equipment, provide the device of bus voltage signal for mechanical and electrical protection equipment and electric energy metrical.
When electrical network is properly functioning, the electric current that current transformer flows through is the most little, but short circuit current is general very big, and along with net capacity
Increase, short circuit current is increasing.Because there is magnetic saturation problem in electromagnetic current transducer, it is difficult to realizes large-range measuring,
One transformer is difficult to meet the needs of high-precision measuring and relay protection simultaneously.Electronic current mutual inductor has the widest dynamic
Scope, an electronic current mutual inductor can meet the needs of metering and relay protection simultaneously.And conventional current transformer is mould
Analog quantity exports, it is impossible to meet the requirement of digital transformer substation.
Being coupled by iron core between side high-voltage signal and secondary coil, between them of conventional electromagnetic current transformer
Insulation system complicated, its cost rises with electric pressure exponentially relation.High-side signal is led to by electronic current mutual inductor
Crossing the good fiber-optic transfer of insulating properties to secondary device, this makes its insulation system be greatly simplified, electric pressure its property the highest
Valency is more obvious than advantage.Electronic current mutual inductor utilizes optical fiber rather than cable as signal delivery means, it is achieved that just
, there is not Current Transformer Secondary and open a way to equipment and the personal harm caused in the thorough isolation of pressure, safety and reliability is big
Big height.
Traditional electromagnetic current transducer is bulky, and weight is big, and cost is high.And its weight of electronic current mutual inductor
The electromagnetic current transducer of more identical electric pressure is much smaller.
Punching electronic current mutual inductor has that volume is little, lightweight, can open, the feature such as be easily installed, and is widely used in
In compact all-insulated looped network switch cabinet, it is directly clamped among during installation on the line cable connected, simple and efficient.At ABB-
SafeRing/SafePlus, Schneider RM6/SM6, Eton SVS, Germany GA/GE, France's compact all insulation such as FB, Korea S SS
Loop-network switch cabinet is extensively applied, also in prefabricated substation and cable distribution box.
Summary of the invention
The purpose of this utility model seeks to provide a kind of intelligent gas-filling cabinet punching electronic current mutual inductor, its energy
Solving traditional transformer bulky, weight is big, and cost is high, and insulating properties are low, and analog output, it is impossible to meet digitized
The problem that transformer station requires.
The purpose of this utility model is achieved in that
Intelligent gas-filling cabinet punching electronic current mutual inductor, including shell, sealed silicon rubber AB glue, it is characterised in that:
Described sealed silicon rubber AB glue is filled in the centre of R type permalloy iron core and Luo-coil and housing, is used for insulating and dispelling the heat；
Described R type permalloy iron core and Luo-coil are arranged on the centre of electronic current mutual inductor main body, are used for providing magnetic flux
Path, improves the magnetic capacity of magnetic circuit and reduces the eddy-current loss of iron core；Air China's aviation terminal is arranged on electronic current mutual inductance
The secondary outgoing line end of device, for being delivered to optical fiber electronic current mutual inductor secondary voltage signal；Described optical fiber one end with
Air China's aviation terminal connects, and the other end is connected with combining unit, for transfer overvoltage pulse signal；Described combining unit is installed
At the afterbody of electronic current mutual inductor, do synchronization merging treatment for the signal that each phase far-end is transmitted.
Described shell is to use flame-proof ABS composite engineering plastics to make.
Described R type permalloy iron core and Luo-coil, R type permalloy iron core transverse cross section is oval, uses
IJ85 material is made, as measuring level；Luo-coil is as protected level, and pours into current transformer body with sealed silicon rubber AB glue.
The outer surface of described R type permalloy iron core and Luo-coil uses copper braid over braid dual with semiconductive crimped paper
Shield technology.
Described combining unit includes the process of PIN, data, drive circuit, laser instrument, and PIN carries out data process, one
Data after divisional processing merge, and are used for measuring protection and observing and controlling, another part process after data by drive circuit and
Laser instrument.
Described electronic current mutual inductor can directly and instrument, protective relaying device interface, it is achieved measures, control, survey
Amount, the function of protection.
Compared with prior art, advantage is as follows for this utility model:
1. precision is high: 0.1S/0.2S level.This mainly has benefited from the intelligent electronic type Current Mutual Inductance of development and production voluntarily
Device has a following characteristics:
(1) iron core that permalloy IJ85 material does, performance highlights, the typical magnetic that relatively silicon steel material is excellent with ferrite
Performance, has higher temperature stability and aging stability.
(2) shell uses flame-proof ABS composite engineering plastics as the exterior insulation of transformer, compared to general iron shell, has
There are the characteristics such as high-impact, height are heat-resisting, and can anti-magnetic interference.
(3) utility model works temperature rise is little, general only about 1 DEG C.Temperature characterisitic concordance is good, intrinsic standoff ratio error band
Scope is little.
(4) outer surface of this utility model R type permalloy iron core and Luo-coil arranges copper braid over braid and semiconductive wrinkle
Stricture of vagina paper dual shield technology, makes product have extraordinary stability in performance.In the case of temperature and curent change,
Its ratio error, and phase error keeps constant completely.
2, dielectric level is high: sealed silicon rubber AB glue does transformer insulating body.Operation does not have punch-through occur, electricity
Resistance electrode insulation intensity is the highest.
3, transformer intrinsic standoff ratio is high: can directly obtain required small signal, be easy to EVT, OVT and digital voltmeter connects
Mouthful.
4, without magnetic: both perplexed without ferromagnetic resonance, also without electromagnetic compatibility problem.
5, without " electric charge trap ": electrical network transient process can be solved and be detained the series of problems that electric charge brings.
6, phase voltage can be measured.
7, line voltage (can also simultaneously measure phase voltage and line voltage) can be measured.
8, it is available for measuring harmonic wave to be used.
9, material cost, low cost of manufacture is lower by more than 20% than conventional electromagnetic current transformer.
10, operation expense is low, can evade the electronic unit life-span in conventional electrical formula current transformer and not reach 20 years
Etc. problem.
11, this electronic current mutual inductor is put without office under 2 times of running voltages.
Accompanying drawing explanation
Fig. 1 is the structure of the intelligent gas-filling cabinet punching electronic current mutual inductor that this utility model embodiment provides
Schematic diagram；
Fig. 2: Luo-coil design principle figure；
Fig. 3: electronic type straight-through current transformer schematic diagram；
In figure: 1, shell；2, sealed silicon rubber AB glue；3, R type permalloy iron core and Luo-coil；4, Air China's aviation end
Son；5, optical fiber；6, combining unit.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail；Should be appreciated that described specific embodiment
Only in order to explain this utility model, it is not used to limit this utility model.
Embodiment:
It is oval for measuring level design R type permalloy iron core transverse cross section, uses IJ85 material to make, R type perm closes
The electronic current mutual inductor that aufe core is made, the open circuit loss that it makees iron core transformer than common amorphous (refers to transformer secondary
During open circuit, in the power attenuation that primary records) decline about 60%, (during transformer secondary open circuit, primary still has one to no-load current
Fixed electric current, this portion of electrical current is referred to as no-load current) decline about 65%, it is that the comparatively ideal electronic current of current energy-saving effect is mutual
Sensor, is particularly well-suited to rural power grids and developing region even load rate lower ground side.The electricity that R type permalloy iron core is made
Big electric current, the significant trouble being inherently eliminated in Operation of Electric Systems will not be produced during type current transformer second open circuit
Hidden danger, has farthest ensured the safety of personnel and equipment.
Protected level is designed with Luo-coil, and Luo-coil is the coil of a kind of hollow circular, has flexible and rigid two kinds,
Can be directly sleeved on measured conductor and measure alternating current.It designs ultimate principle as shown in Figure 2:
It is Faraday law of electromagnetic induction and Ampere circuit law that Luo-coil measures the theoretical foundation of electric current, when tested electricity
Flow along axis by Luo-coil center time, in the volume that Circular Winding is surrounded, produce the magnetic field of respective change, intensity is
H, is obtained by Ampere circuit law:
∮H·dl=I(t)
By B=μ H, e(t)=d Φ/dt, Ф=N ∫ B dS, e(t)=M di/dt:
When its cross section is rectangle, mutual inductance M
M=μ0Nhln(b/a)/2π
In above formula, H is the magnetic field intensity of coil inside, and B is the magnetic induction of coil inside, and μ 0 is permeability of vacuum, N
For coil turn, e(t) it is the induced voltage at coil two ends, a, b are respectively the internal-and external diameter of coil section, and h is depth of section.
Owing to Luo-coil has without iron core, without hysteresis effect and magnetic saturation phenomenon, response band significantly improves；
Not electrical connection between sensing head and tested electric current, the least on the impact of tested loop；Carried out by optical fiber between high and low pressure side
Signal transmits, it is achieved that good electric insulation, has unique advantage at high and low pressure and extra-high voltage application；Volume is little, weight
Amount is light, be easily achieved the automatization measured and protect and digitized etc..This utility model belongs to active type electronic current mutual inductance
Device, so this utility model uses Luo-coil to do the protected level of electronic current mutual inductor.
Intelligent gas-filling cabinet uses SF6 inflation.
Shell uses flame-proof ABS composite engineering plastics as the exterior insulation of transformer, compared to general iron shell, has
There are the characteristics such as good looking appearance, cheap, high-impact, height are heat-resisting, fire-retardant, and can anti-magnetic interference.
Preferably, (measuring level is through Air China's aviation terminal to convert, through electronic mutual inductor, the secondary small voltage signal that obtains
Three holes, protected level is five holes) send, it is sent to combining unit by optical fiber.
Preferably, combining unit includes (process of PIN photodiode, data, drive circuit, laser instrument), by small voltage
Signal carries out data process, and the data after a part processes merge, and is used for measuring protection and observing and controlling, after another part processes
Data by drive circuit and laser instrument.
Preferably, intelligent inflation-cabinet-type punching electronic current mutual inductor can directly and instrument, protective relaying device
Interface, it is achieved the function measure, control, measure, protected.
It is as follows that this utility model measures the advantage that level employing R type permalloy iron core transverse cross section is oval:
1, compared with the iron core that cross section is circle, the iron space factor in oval inscribed circle is higher, window and girth
Size is less, angle heavy and light, can effectively save stalloy and copper cash consumption.
2, compared with being circular iron core with cross section, although the iron space factor in oval inscribed circle is relatively low, but in connect
Circumference size is less, and the reduction amplitude of copper cash consumption is more than the increasing degree of stalloy consumption.Comprehensive economic index, elliptical cross section
It is many that face iron core scheme saves effective material cost compared with circular cross-section iron core scheme.
3, R type permalloy iron core transverse cross section is oval winding-winding equipment and the iron core winding that cross section is circle
Winding equipment is compared, and winding technique technique is simple, work efficiency is high.
4, compared with the iron core product structure that cross section is circle, conductive line bends stress is more uniform, and winding resistance to shorting is held
Stronger by ability.
In sum, R type permalloy iron core transverse cross section is that ellipsoidal structure is applied in electronic current mutual inductor,
Material-saving and optimization design aspect have tangible significant progress.
Operation principle of the present utility model: this utility model belongs to low-power iron core current transformer (LPCT).LPCT has
There are output sensitivity height, technology maturation, stable performance, are prone to the features such as production in enormous quantities；Additionally, due to its secondary load is relatively
Little, add the application of high conducting magnet core material, it is possible to achieve the measurement to Larger Dynamic range current.The output voltage letter of LPCT
Number be converted to digital light pulse signal by being positioned on high-tension side signal processing circuit, reach low-pressure end control room via optical fiber, so
After processed circuit by low-side signal optical signal be reduced to the signal of telecommunication, and provide and measure and the output of two signalling channels of protection
Interface.Due to the passage using optical fiber to connect as high and low pressure side signal, so reducing to a great extent Current Mutual Inductance
The requirement of device insulation system.
This utility model schematic diagram is as shown in Figure 3；
Wherein Rsh (R) is secondary side the sampling resistor connect, and NP, NS are primary side respectively, the coil windings circle of secondary side
Number, I is primary side current.
Mentality of designing the most of the present utility model is in high-pressure side, the analogue signal obtained from LPCT to be carried out in situ A/D to turn
Change, and digital quantity is converted to optical signal；Transformer body provide standard optical communication interface, optical signal by this interface by light
Fibre reaches the signal receiving unit of control room.This optical signal is reduced to digital electric at control room by low-side signal processing unit
Signal, and according to relay protection and the requirement of the equipment of measurement, signal is separated, and protection passage and Measurement channel are provided
Output interface.Signal carries out two times transfer device after the transmission system of optical fiber, secondary output meet IEC60044-7:1999 and
The specified secondary output voltage of GB/T20840 8-2007 " electronic current mutual inductor " standard, uses principles above to produce
Intelligent gas-filling cabinet punching electronic current mutual inductor can directly and instrument, protective relaying device interface, thus realize counting
The function measure, control, measure, protected.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model
Protection domain within.
Claims (6)
1. intelligent gas-filling cabinet punching electronic current mutual inductor, including shell, sealed silicon rubber AB glue, it is characterised in that: institute
The sealed silicon rubber AB glue stated is filled in the centre of R type permalloy iron core and Luo-coil and housing, is used for insulating and dispelling the heat；Institute
The R type permalloy iron core stated and Luo-coil are arranged on the centre of electronic current mutual inductor main body, are used for providing flux path
Footpath, improves the magnetic capacity of magnetic circuit and reduces the eddy-current loss of iron core；Air China's aviation terminal is arranged on electronic current mutual inductor
Secondary outgoing line end, for electronic current mutual inductor secondary voltage signal is delivered to optical fiber；Described optical fiber one end with in
Boat aviation terminal connects, and the other end is connected with combining unit, for transfer overvoltage pulse signal；Described combining unit is arranged on
The afterbody of electronic current mutual inductor, does synchronization merging treatment for the signal transmitting each phase far-end.
Intelligent gas-filling cabinet punching electronic current mutual inductor the most according to claim 1, it is characterised in that: described
Shell is to use flame-proof ABS composite engineering plastics to make.
Intelligent gas-filling cabinet punching electronic current mutual inductor the most according to claim 1, it is characterised in that: described
R type permalloy iron core and Luo-coil, R type permalloy iron core transverse cross section is oval, uses IJ85 material to make, makees
For measuring level；Luo-coil is as protected level, and pours into current transformer body with sealed silicon rubber AB glue.
4. according to the intelligent gas-filling cabinet punching electronic current mutual inductor described in claim 1 or 3, it is characterised in that: institute
The R type permalloy iron core stated and the outer surface of Luo-coil use copper braid over braid and semiconductive crimped paper dual shield technology.
Intelligent gas-filling cabinet punching electronic current mutual inductor the most according to claim 1, it is characterised in that: described
Combining unit includes the process of PIN, data, drive circuit, laser instrument；PIN is carried out data process, the data after part process
Merging, be used for measuring protection and observing and controlling, the data after another part processes pass through drive circuit and laser instrument.
Intelligent gas-filling cabinet punching electronic current mutual inductor the most according to claim 1, it is characterised in that: described
Electronic current mutual inductor can directly and instrument, protective relaying device interface, it is achieved the function measure, control, measure, protected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620449989.9U CN205789380U (en) | 2016-05-17 | 2016-05-17 | Intelligent gas-filling cabinet punching electronic current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620449989.9U CN205789380U (en) | 2016-05-17 | 2016-05-17 | Intelligent gas-filling cabinet punching electronic current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205789380U true CN205789380U (en) | 2016-12-07 |
Family
ID=58118826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620449989.9U Expired - Fee Related CN205789380U (en) | 2016-05-17 | 2016-05-17 | Intelligent gas-filling cabinet punching electronic current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205789380U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826000A (en) * | 2016-05-17 | 2016-08-03 | 江苏靖江互感器厂有限公司 | Straight-through electron type current transformer for intelligent C-GIS |
| CN106597346A (en) * | 2016-12-08 | 2017-04-26 | 中国电力科学研究院 | Electronic current transformer laser energy supply self-diagnosis method and system thereof |
-
2016
- 2016-05-17 CN CN201620449989.9U patent/CN205789380U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826000A (en) * | 2016-05-17 | 2016-08-03 | 江苏靖江互感器厂有限公司 | Straight-through electron type current transformer for intelligent C-GIS |
| CN106597346A (en) * | 2016-12-08 | 2017-04-26 | 中国电力科学研究院 | Electronic current transformer laser energy supply self-diagnosis method and system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103558440B (en) | A kind of intelligent electronic type voltage transformer | |
| CN201514851U (en) | Outdoor self-excited source three-phase combined electronic transducer metering device | |
| CN100454453C (en) | Low-power electronic current mutual inductor | |
| CN202258772U (en) | Epoxy pouring totally-closed support type electronic combined transformer for centrally installed switchgear | |
| CN205789380U (en) | Intelligent gas-filling cabinet punching electronic current mutual inductor | |
| CN105826000B (en) | A kind of intelligence gas-filling cabinet punching electronic current mutual inductor | |
| CN201302592Y (en) | Electrical energy measuring cabinet | |
| CN101770855B (en) | Electronic combined transformer for digitalized power station | |
| CN201319314Y (en) | Current transformer | |
| CN1967264B (en) | Spiral hollow coil current transformer with compensating coils | |
| CN219800651U (en) | Current transformer | |
| CN104714070A (en) | Current sensor adopting differential coil structure | |
| CN201663050U (en) | Electronic combined transformer | |
| CN201716359U (en) | Non-contact electronic type voltage sampling device | |
| CN201035079Y (en) | Luo coil great current integrated intelligent detector | |
| CN201036148Y (en) | Helix tube type aircore coil current sensor | |
| CN203070913U (en) | High-voltage line current transformer | |
| CN202307493U (en) | Electronic type current transformer | |
| CN202870144U (en) | Current measuring device for breaker or switch cabinet | |
| CN207937502U (en) | A kind of on-pole switch electronic current mutual inductor | |
| CN201332016Y (en) | Electronic type current transformer for digital transformer substation | |
| CN102360886A (en) | Electromagnetic and electronic hybrid current transformer | |
| CN201319315Y (en) | Current transformer | |
| CN2540637Y (en) | Electronic current-voltage combined sensor | |
| CN202093079U (en) | Electronic type voltage transformer based on coaxial differential pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170814 Address after: 214500 Zhenjiang City, Jingjiang Province, Taizhou, West to Ping Road, No. 23, No. Patentee after: JIANGSU YONGCHANG HIGH VOLTAGE ELECTRICAL APPLIANCE Co.,Ltd. Address before: 214500 Zhenjiang City, Jingjiang Province, Taizhou, West to Ping Road, No. 23, No. Patentee before: JIANGSU JINGJIANG INSTRUMENT TRANSFORMER FACTORY |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190531 Address after: 214500 No. 23 Laizhen Jiangping Road, Jingjiang West, Taizhou City, Jiangsu Province Patentee after: JIANGSU JINGJIANG TRANSFORMER Co.,Ltd. Address before: 214500 No. 23, Jiangping Road, Xilaizhen, Jingjiang City, Taizhou City, Jiangsu Province Patentee before: JIANGSU YONGCHANG HIGH VOLTAGE ELECTRICAL APPLIANCE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |