CN209281982U - Indoor three-phase electronic current transformer - Google Patents
Indoor three-phase electronic current transformer Download PDFInfo
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- CN209281982U CN209281982U CN201822155223.1U CN201822155223U CN209281982U CN 209281982 U CN209281982 U CN 209281982U CN 201822155223 U CN201822155223 U CN 201822155223U CN 209281982 U CN209281982 U CN 209281982U
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Abstract
The utility model relates to electric system high-tension measurement and protective device, specifically a kind of indoor three-phase electronic current transformer.Including insulator and it is sealed and placed in the intracorporal A phase coil of insulation, B phase coil, C phase coil and zero sequence coil, wherein A phase coil, B phase coil, C phase coil are equidistant is sleeved on zero sequence coil inside, A phase coil, B phase coil, C phase coil and zero sequence coil secondary lead terminal be set to a side bottom of insulator, the secondary lead-out wire of A phase coil is parallel with A phase sample resistance, the secondary lead-out wire of B phase coil is parallel with B phase sample resistance, the secondary lead-out wire of C phase coil is parallel with C phase sample resistance, and the secondary lead-out wire of zero sequence phase coil is parallel with zero sequence sample resistance.The utility model is convenient to connect with digital instrument, Microcomputer Protection control equipment interface, realizes the function of metering, control, measurement, protection and data transmission.
Description
Technical field
The utility model relates to electric system high-tension measurement and protective device, specifically a kind of indoor three-phase electronic
Current transformer.
Background technique
Electronic current mutual inductor is to meet modern power systems middle/high-voltage electrical appliance equipment to intelligence, modularization, small-sized
Change, is multi-functional, the needs of one of the key equipment that non-maintaining direction is developed and Automation of Electric Systems, digital development.It is existing
The microcomputer composite measurement protective device and instrument and meter of generationization no longer need mutual inductor offer energy to carry out work, only need mutual inductor will
Primary current information is complete, in time, accurately acquires and sends, it is only necessary to the voltage signal of several volts and minimum power
It is just able to satisfy its interface requirements, traditional electromagnetic current transducer is difficult to be done directly computer technology to electric current complete information
Carry out the requirement of digitized processing, it is difficult to realize the on-line monitoring that power grid changes electrical parameter.It is automatic to hinder electric system
Change and develops to higher level.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of indoor three-phase electronic current transformer, with
It solves conventional electromagnetic current transformer and is not able to satisfy Automation of Electric Systems, digitized processing demand for development.
To achieve the goals above, the utility model uses following technical scheme:
A kind of indoor three-phase electronic current transformer, including insulator and it is sealed and placed in the intracorporal A phase line of the insulation
Circle, B phase coil, C phase coil and zero sequence coil, wherein A phase coil, B phase coil, C phase coil are equidistant is sleeved on zero sequence coil
Inside, the A phase coil, B phase coil, C phase coil and zero sequence coil secondary wiring terminals be set to the one of the insulator
Side bottom, the secondary lead-out wire of the A phase coil are parallel with A phase sample resistance, and the secondary lead-out wire of the B phase coil is parallel with
B phase sample resistance, the secondary lead-out wire of the C phase coil are parallel with C phase sample resistance, the secondary extraction of the zero sequence phase coil
Line is parallel with zero sequence sample resistance.
The insulator is an integral structure using poured with epoxy resin.
The insulator is ellipsoidal structure.
The bottom of the insulator is plane and is embedded with multiple embedded nuts.
There are three equidistant circular bus holes for the central distribution of the three-phase coil of the insulator.
The secondary wiring terminals are located in the recess portion that one side bottom of insulator is equipped with.
The utility model have the following advantages that and the utility model has the advantages that
1. small in size, structure is simple: A, B, C three-phase coil and zero sequence coil of the utility model use poured with epoxy resin
For common type structure, the much room of previous three single-phase current transformers and a zero sequence current mutual inductor, product are saved
Volume very little, the simpler saving of structure.
2. easy-to-connect, flexible for installation: the specially designed secondary wiring terminals position of the utility model and switch internal protect
Wire casing can smoothly transit combination, and wiring is more convenient；Four embedded nuts equidistantly distributed realize four with switch internal
A mounting hole, which is accurately positioned, to be fixedly mounted, and is installed very convenient flexible.
3. perfect performance, insulation are reliable: three monophase current coils are equidistant to be sleeved on zero sequence coil inside, keeps product same
The function of Shi Shixian individual phase measurement and three-phase zero sequence relay protection, performance is more improved reliably, whole to use epoxide resin vacuum
It is poured, good sealed insulation ensure that product insulation is very reliable.
4. function is advanced, flexible in application: the product function of the utility model is advanced, integrates measurement and protection, can be fast
Speed, it is complete, accurately by primary information send to computer carry out data processing or with the measurements, protective device such as digital instrumentation
It is connected, realizes metering, measurement, protection, control, status monitoring.And output be small voltage signal, easily with it is digital
Instrument, microcomputer measuring and controlling protect equipment interface, and without carrying out two times transfer, application is very flexible.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the cross-sectional view of the utility model.
In figure: 1 is iron core, and 2 be secondary winding, and 3 be A phase coil, and 4 be B phase coil, and 5 be C phase coil, and 6 be zero sequence line
Circle, 7 be secondary wiring terminals, and 8 be insulator, and 9 be bus hole, and 10 be embedded nut, and 11 be A phase sample resistance, and 12 take for B phase
Sample resistance, 13 be C phase sample resistance, and 14 be zero sequence sample resistance.
Specific embodiment
In order to keep the purpose of this utility model, technical solution and advantage clearer, with reference to the accompanying drawing and it is embodied
The utility model is described in detail in example.
As shown in Figure 1-3, a kind of indoor three-phase electronic current transformer provided by the utility model, including insulator 8
And it is sealed and placed in A phase coil 3, B phase coil 4, C phase coil 5 and zero sequence coil 6 in insulator 8, wherein A phase coil 3, B phase coil
4, C phase coil 5 is equidistant is sleeved on inside zero sequence coil 6, A phase coil 3, B phase coil 4, C phase coil 5 and zero sequence coil 6 two
Secondary connecting terminal 7 is set to a side bottom of insulator 8, and the secondary lead-out wire of A phase coil 3 is parallel with A phase sample resistance 11, B
The secondary lead-out wire of phase coil 4 is parallel with B phase sample resistance 12, and the secondary lead-out wire of C phase coil 5 is parallel with C phase sample resistance
13, the secondary lead-out wire of zero sequence coil 6 is parallel with zero sequence sample resistance 14.
Insulator 8 is an integral structure using poured with epoxy resin, and is ellipsoidal structure.The bottom of insulator 8 is flat
Face and it is embedded with multiple embedded nuts 10.
In the embodiments of the present invention, the bottom of insulator 8 is equidistantly embedded there are four embedded nut 10.Insulation
There are three equidistant circular bus holes 9 for the central distribution of the three-phase coil of body 8.Secondary wiring terminals 7 are located at insulator 8 one
In the recess portion that side bottom is equipped with.This Position Design and switch internal shield wire casing can smoothly transit combination, thoroughly solve original
The complicated processes of the need of more mutual inductors independently wiring facilitate secondary cable lead simultaneously and are conducive to secondary insulating
Processing.
A phase coil 3, B phase coil 4,5 structure of C phase coil are identical, and each single phase winding is that secondary winding 2 is equably wound on
On the iron core 1 of circular ring type, then insulation and the wrapping of padded coaming are carried out, three-phase single phase winding successively equally completes；Zero sequence coil 6
It is that secondary winding 2 is equably wound on oval ring-like iron core 1, then carries out insulation and the wrapping of padded coaming；Four coils
It is after being respectively completed, A phase sample resistance 11, B phase sample resistance 12, C phase sample resistance 13, zero sequence sample resistance 14 is in parallel respectively
A phase coil 3, B phase coil 4, C phase coil 5, zero sequence coil 6 secondary lead-out wire on, and with insulating materials and binding material into
Row wrapping, by the equidistant inside for being sleeved on zero sequence coil 6 of three single phase windings, being formed has secondary wiring terminals 7, secondary line
Enclose the coil body of (A phase coil 3, B phase coil 4, C phase coil 5 and zero sequence coil 6)；When die-filling, zero sequence coil 6 is first put into mould
In tool, A phase coil 3, B phase coil 4, C phase coil 5 are pacified into sighting target knowledge and are successively placed on above zero sequence coil 6, zero sequence coil 6 and A
Phase coil 3, B phase coil 4 pad insulating materials between C phase coil 5, embedded nut 10 are fixed on mold, wiring secondary connection
Terminal 7 adjusts A phase coil 3, B phase coil 4, C phase coil 5, zero sequence coil 6 and A phase sample resistance 11, B phase sample resistance
12, it is poured solidification insulation with epoxide resin vacuum after the distance of C phase sample resistance 13, zero sequence sample resistance 14, becomes one therewith
A resin insulator 8 makes product while realizing the function of individual phase measurement and three-phase zero sequence relay protection.It is whole to use epoxy resin
Vacuum pouring is a resin insulator 8, and resin insulator is oval pieshape, and product has structure simple, and volume is smaller
Feature.There are three equidistant circular bus hole 9, the three-phases of mutual distance and switch internal for the central distribution of three-phase coil
High voltage bus be equidistantly from, using installation when, bus hole 9 can with the casing of three-phase solid-sealed high voltage bus be fitted close install
And insulated enclosure；Secondary wiring terminals 7 are located at 8 side bottom indent position of insulator, this Position Design and switch internal protect wire casing
Can smoothly transit combination, thoroughly solve the complicated processes of the need of original more mutual inductors independently wiring, facilitate two
Secondary cable tail simultaneously and is conducive to the processing of secondary insulating.8 bottom plane of insulator is embedded embedding there are four equidistantly distributing
Loading nut 10 is realized and fixed installation is accurately positioned with four mounting holes of switch internal.
When installing and using, this product is mounted on outgoing line side in switch-box body, and switch internal high voltage bus casing initially passes through production
The circular busbar hole of product, is then fixed on the positioning product with the embedded nut of bottom surface, finally in box house according to design
It is required that carrying out secondary lead wires wiring, the convenient, flexible completion of the utility model installment work.
Indoor three-phase electronic current transformer provided by the utility model is one designed fully according to national standard
Kind new product, using electromagnetic conversion principle, primary current is converted into and primary electricity using quality material using iron core is rolled
Flow proportional small voltage signal identical with phase, send to computer carry out data processing or measured with digital instrumentation etc.,
Protective device is connected, and realizes the functions such as metering, measurement, protection and data transmission, eliminates conventional electromagnetic current transformer two
Secondary open circuit is to power system device and personal safety bring potential faults.
The utility model is formed using epoxide resin vacuum is casting insulated, there is small in size, low in energy consumption, insulation to stablize, peace
The characteristics of complete reliable, measurement range is wide, function is advanced, use flexibly, further improves power system device automation, number
The level of change.
The foregoing is merely the embodiments of the present invention, are not intended to limit the protection scope of the utility model.It is all
Any modification, equivalent substitution and improvement made within spirit of the present utility model and principle, extension etc., are all contained in this reality
With in novel protection scope.
Claims (6)
1. a kind of indoor three-phase electronic current transformer, which is characterized in that including insulator (8) and be sealed and placed in the insulator
(8) A phase coil (3), B phase coil (4), C phase coil (5) and zero sequence coil (6) in, wherein A phase coil (3), B phase coil
(4), the equidistant zero sequence coil (6) that is sleeved on of C phase coil (5) is internal, the A phase coil (3), B phase coil (4), C phase coil
(5) and the secondary wiring terminals (7) of zero sequence coil (6) are set to a side bottom of the insulator (8), the A phase coil (3)
Secondary lead-out wire be parallel with A phase sample resistance (11), the secondary lead-out wire of the B phase coil (4) is parallel with B phase sample resistance
(12), the secondary lead-out wire of the C phase coil (5) is parallel with C phase sample resistance (13), secondary the drawing of the zero sequence coil (6)
Outlet is parallel with zero sequence sample resistance (14).
2. indoor three-phase electronic current transformer according to claim 1, which is characterized in that the insulator (8) is adopted
It is an integral structure with poured with epoxy resin.
3. indoor three-phase electronic current transformer according to claim 2, which is characterized in that the insulator (8) is
Ellipsoidal structure.
4. indoor three-phase electronic current transformer according to claim 2, which is characterized in that the insulator (8)
Bottom is plane and is embedded with multiple embedded nuts (10).
5. indoor three-phase electronic current transformer according to claim 2, which is characterized in that the insulator (8)
There are three equidistant circular bus holes (9) for the central distribution of three-phase coil.
6. indoor three-phase electronic current transformer according to claim 2, which is characterized in that the secondary wiring terminals
(7) it is located in the recess portion that (8) one side bottom of insulator is equipped with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822155223.1U CN209281982U (en) | 2018-12-21 | 2018-12-21 | Indoor three-phase electronic current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822155223.1U CN209281982U (en) | 2018-12-21 | 2018-12-21 | Indoor three-phase electronic current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209281982U true CN209281982U (en) | 2019-08-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822155223.1U Active CN209281982U (en) | 2018-12-21 | 2018-12-21 | Indoor three-phase electronic current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209281982U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571034A (en) * | 2019-09-12 | 2019-12-13 | 湖北大二互科技股份有限公司 | Three-phase current transformer |
| CN111856112A (en) * | 2020-06-18 | 2020-10-30 | 上海置信智能电气有限公司 | High-precision zero-sequence current sensor based on current synthesis and precise magnetomotive transformation |
-
2018
- 2018-12-21 CN CN201822155223.1U patent/CN209281982U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571034A (en) * | 2019-09-12 | 2019-12-13 | 湖北大二互科技股份有限公司 | Three-phase current transformer |
| CN111856112A (en) * | 2020-06-18 | 2020-10-30 | 上海置信智能电气有限公司 | High-precision zero-sequence current sensor based on current synthesis and precise magnetomotive transformation |
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