CN203733610U - Fixedly-installed current transformer and ring main unit - Google Patents
Fixedly-installed current transformer and ring main unit Download PDFInfo
- Publication number
- CN203733610U CN203733610U CN201320864878.0U CN201320864878U CN203733610U CN 203733610 U CN203733610 U CN 203733610U CN 201320864878 U CN201320864878 U CN 201320864878U CN 203733610 U CN203733610 U CN 203733610U
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- CN
- China
- Prior art keywords
- current transformer
- iron core
- main unit
- ring main
- hole
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- 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
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- Transformers For Measuring Instruments (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model provides a fixedly-installed current transformer and a ring main unit. The current transformer comprises a shell, a sensing iron core and a secondary terminal. The sensing iron core and the secondary terminal are located in the shell. A winding is arranged on the sensing iron core. A wire inlet end and a wire outlet end of the winding are respectively led to the secondary terminal. The sensing iron core, the winding and the secondary terminal are poured together through a sealant. The shell is further provided with a wiring hole enabling an external wire to be connected to the secondary terminal. The shell is further provided with an installation hole used for fixing the current transformer. The current transformer is further provided with a through hole enabling a cable to penetrate. The through hole is located in the center of the sensing iron core. According to the fixedly-installed current transformer, not only can the installation convenience of the current transformer be improved, but also the accuracy of current monitoring is effectively improved.
Description
Technical field
The utility model relates to a kind of current monitoring device, relates in particular to a kind of fixed installation formula current transformer and ring main unit.
Background technology
In Distribution Automation Construction and transformation, the application of current transformer aspect monitoring is more and more, in < < Distribution Automation Construction and transformation standard designing technique regulation > > file, also stipulate to realize the equipment of telemetry function, should at least possess current transformer.Present stage, mostly all adopt traditional cable straight-through current transformer (open type or non-open type) when installing self-operated measuring unit additional, to be sleeved on the line cable of ring main unit.
Above-mentioned current transformer, be not to design for ring main unit on the one hand, the current transformer capacity of selecting in actual applications does not mate with described ring main unit performance, affected the certainty of measurement of electric current, traditional current transformer volume and weight is large on the other hand, when installing self-operated measuring unit additional instrument transformer carried out to fitting operation, to install inconveniently, cost is also higher.
Utility model content
The utility model is intended to solve in prior art current transformer capacity and does not mate with ring main unit performance and inconvenient technical problem is installed, provide a kind of just can be fixedly mounted on cabinet before ring main unit dispatches from the factory, and easy for installation, the frequent fixed installation formula current transformer of dismounting.
Embodiment of the present utility model provides a kind of fixed installation formula current transformer, comprise shell and be positioned at sensing iron core, the secondary terminals of shell, described sensing iron core is provided with winding, the end of incoming cables of described winding and leading-out terminal are drawn out to respectively on secondary terminals, described sensing iron core, winding and secondary terminals are cast in together by fluid sealant, on described shell, be also provided with for outside lead and be linked into the wiring hole on secondary terminals, on described shell, be also provided with the installing hole of fixed current instrument transformer;
Wherein said current transformer also has the through hole that current supply cable penetrates, and described through hole is positioned at the center of sensing iron core.
Further, described sensing iron core is " mouth " font or " O " font.
Further, described fluid sealant is epoxy resin.
Further, described sensing iron core is comprised of silicon steel sheet.
Further, the internal diameter of described through hole is 85mm.
Embodiment of the present utility model also provides a kind of ring main unit, described ring main unit has the interface of stube cable plug, above-mentioned fixed installation formula current transformer is installed on described ring main unit, described current transformer is fixedly installed on described ring main unit shell by the installing hole arranging on it, the interface of the corresponding described ring main unit of lead to the hole site of described current transformer, the diameter of through hole is greater than the maximum gauge of cable plug.
Further, the sensing iron core of described current transformer is " mouth " font or " O " font.
Further, the through hole internal diameter of described current transformer is 85mm.
In above technical scheme, by installing hole is set on current transformer, can before ring main unit dispatches from the factory, current transformer be fixedly mounted on described ring main unit, easy for installation, avoided the problem of frequent dismounting, simultaneously according to the performance index of the capacity of each current transformer and ring main unit, before dispatching from the factory, just current transformer can be matched and is arranged on corresponding ring main unit, effectively improve current transformer capacity and the ring main unit performance performance that matches, effectively improved the accuracy to current monitoring.
Accompanying drawing explanation
Fig. 1 is the structure cutaway view of a kind of embodiment of the utility model fixed installation formula current transformer;
Fig. 2 is the construction profile figure of the utility model fixed installation formula current transformer.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of fixed installation formula current transformer, and as shown in Figure 1, described fixed installation formula current transformer comprises shell 1, and is positioned at secondary terminals 2, sensing iron core 4, winding 5, the fluid sealant 6 of shell 1.
Described winding 5 is wound on described sensing iron core 4, and the concrete winding of winding 5 can be selected according to actual demand, does not repeat them here.Leading-out terminal of formation and an end of incoming cables after winding 5 coilings complete, leading-out terminal and end of incoming cables are drawn respectively and are connected on secondary terminals 2, described sensing iron core 4, winding 5 and secondary terminals 2 are fixed together by fluid sealant 6 cast, on described shell 1, be also provided with for outside lead and be linked into the wiring hole (not shown) on secondary terminals 2, the current signal of current transformer monitoring can send to external monitoring device by outside lead.
On described shell 1, be also provided with the installing hole 7 for fixed current instrument transformer; By this installing hole 7, described current transformer can be fixedly mounted on ring main unit.Described current transformer also has the through hole 3 that current supply cable penetrates, and described through hole 3 is positioned at the center of sensing iron core 4.
Further, described sensing iron core 4 is " mouth " font or " O " font, and winding 5 carries out coiling on the iron core of " mouth " font or " O " font.Described fluid sealant 6 is preferably epoxy resin.
Further, in order to reduce eddy current loss, described sensing iron core 4 adopts silicon steel sheet insulated from each other to build up, and makes eddy current in the loop of thin-and-long, by less cross section, to increase the resistance on eddy current path; Meanwhile, the silicon in silicon steel increases the resistivity of material, also plays the effect that reduces eddy current.Silicon steel sheet is used as the iron core of current transformer, generally can select the cold-reduced silicon sheet that 0.35mm is thick, by the size of required sensing iron core 4, it is cut into microscler or arc-like sheet, then overlapping one-tenth " O " font or " mouth " font.For further reducing eddy current, silicon steel sheet thickness is thinner, and the slip of splicing is narrower, effect is better, and this has not only effectively reduced eddy current loss, has reduced temperature rise, can also save the materials of silicon steel sheet, can also effectively improve current transformer to the induction of electric current and monitoring accuracy simultaneously.
Meanwhile, preferably, the internal diameter of described through hole 3 is 85mm.
The operation principle of above-mentioned fixed installation formula current transformer is: when the electric current in the cable that penetrates described through hole 3 changes, winding 5 inductions on sensing iron core 4 form monitoring current and are drawn out to external monitoring device by secondary terminals 2 and external cabling, realize the monitoring of external monitoring device to electric current in cable.
Embodiments of the invention also provide a kind of ring main unit, described ring main unit is provided with the fixed installation formula current transformer described in above-described embodiment, described ring main unit has the interface of stube cable plug, described current transformer is fixedly installed on described ring main unit shell by the installing hole 7 arranging on it, the interface of the corresponding described ring main unit in through hole 3 positions of described current transformer, in order to guarantee that cable plug can be directly and be installed to easily on described ring main unit, the diameter of described through hole 3 need be greater than the maximum gauge of cable plug.
In the above technical scheme, before dispatching from the factory, ring main unit just the current transformer of this ring main unit performance of coupling can be fixedly installed on described ring main unit, and can be installed in described ring main unit with the external monitoring equipment that current transformer matches, after ring main unit is installed to and is connected in actual scene and with cable, cable is connected on ring main unit by the through hole 3 on current transformer, not only realize the precise monitoring to electric current in ring main unit cable, saved the step that current transformer is installed while installing self-operated measuring unit additional simultaneously, effectively improved the installation convenience of current transformer.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (8)
1. one kind fixedly mounts formula current transformer, it is characterized in that: comprise shell and be positioned at sensing iron core, the secondary terminals of shell, described sensing iron core is provided with winding, the end of incoming cables of described winding and leading-out terminal are drawn out to respectively on secondary terminals, described sensing iron core, winding and secondary terminals are cast in together by fluid sealant, on described shell, be also provided with for outside lead and be linked into the wiring hole on secondary terminals, on described shell, be also provided with the installing hole for fixed current instrument transformer;
Wherein said current transformer also has the through hole that current supply cable penetrates, and described through hole is positioned at the center of sensing iron core.
2. fixed installation formula current transformer according to claim 1, is characterized in that: described sensing iron core is " mouth " font or " O " font.
3. fixed installation formula current transformer according to claim 1, is characterized in that: described fluid sealant is epoxy resin.
4. fixed installation formula current transformer according to claim 2, is characterized in that: described sensing iron core is comprised of silicon steel sheet.
5. fixed installation formula current transformer according to claim 1, is characterized in that: the internal diameter of described through hole is 85mm.
6. a ring main unit, the interface with stube cable plug, it is characterized in that: fixed installation formula current transformer as claimed in claim 1 is installed on described ring main unit, described current transformer is fixedly installed on described ring main unit shell by the installing hole arranging on it, the interface of the corresponding described ring main unit of lead to the hole site of described current transformer, the diameter of through hole is greater than the maximum gauge of cable plug.
7. ring main unit according to claim 6, is characterized in that: the sensing iron core of described current transformer is " mouth " font or " O " font.
8. ring main unit according to claim 6, is characterized in that: the through hole internal diameter of described current transformer is 85mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320864878.0U CN203733610U (en) | 2013-12-25 | 2013-12-25 | Fixedly-installed current transformer and ring main unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320864878.0U CN203733610U (en) | 2013-12-25 | 2013-12-25 | Fixedly-installed current transformer and ring main unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203733610U true CN203733610U (en) | 2014-07-23 |
Family
ID=51203661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320864878.0U Expired - Fee Related CN203733610U (en) | 2013-12-25 | 2013-12-25 | Fixedly-installed current transformer and ring main unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203733610U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107018647A (en) * | 2017-05-24 | 2017-08-04 | 合肥工业大学 | A kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure |
-
2013
- 2013-12-25 CN CN201320864878.0U patent/CN203733610U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107018647A (en) * | 2017-05-24 | 2017-08-04 | 合肥工业大学 | A kind of multilayer electromagnetic shielding cabinet with special teeth groove, arc-shaped slot structure |
| CN107018647B (en) * | 2017-05-24 | 2024-02-13 | 合肥工业大学 | Multilayer electromagnetic shielding cabinet body with special tooth slot and arc clamping groove structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20201225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |