CN2684351Y - Indoor dry three-phase combined current transformer - Google Patents
Indoor dry three-phase combined current transformer Download PDFInfo
- Publication number
- CN2684351Y CN2684351Y CN 200420030350 CN200420030350U CN2684351Y CN 2684351 Y CN2684351 Y CN 2684351Y CN 200420030350 CN200420030350 CN 200420030350 CN 200420030350 U CN200420030350 U CN 200420030350U CN 2684351 Y CN2684351 Y CN 2684351Y
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- CN
- China
- Prior art keywords
- row
- winding
- primary
- instrument transformer
- terminal board
- 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 - Lifetime
Links
- 238000004804 winding Methods 0.000 claims abstract description 31
- 230000009466 transformation Effects 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model relates to a low-voltage measuring device of an electric power system, in particular to an indoor dry three-phase combined current transformer, which comprises a secondary winding, a primary winding and a secondary wiring cover, wherein a primary terminal row and a secondary terminal row form an external connection part; the primary terminal row consists of a primary wire inlet row arranged at the upper part of the mutual inductor and a primary wire outlet row arranged at the lower part of the mutual inductor, and the primary wire inlet row and the primary wire outlet row are externally wrapped with a closed insulating sleeve; a primary winding is wound on a secondary winding arranged in the mutual inductor, the primary winding is respectively connected with a primary wire inlet row and a primary wire outlet row, and a secondary wiring cover is additionally arranged at a wire outlet end of the secondary winding; and a rated transformation ratio is cast on the casting body of the mutual inductor. The utility model discloses compact structure, wiring are convenient, have convenient, safe, reliable maneuverability to have measurement accuracy, anti-electricity-theft characteristics.
Description
Technical field
The utility model relates to a kind of electric power system low pressure measurement equipment, the three phase combined current transformer of particularly a kind of indoor dry type.
Background technology
Instrument transformer is the equipment of power system measuring electric current, electric energy.Existing indoor application instrument transformer mostly is divided into two kinds: oil immersed type instrument transformer, dry type mutual inductor.The dielectric of oil immersed type instrument transformer is subjected to the influence of indoor temperature, humidity bigger, leakage of oil easily in the use, and medium is easily aging, easily causes insulation breakdown because of influencing insulation effect.For fear of having an accident, power department regularly carries out preventative test to this kind equipment, has increased workload, has also expended substantial contribution.Along with development of science and technology, the oil immersed type instrument transformer is replaced by dry type mutual inductor gradually.At present, the current transformer that indoor metering current, electric energy are used mostly is three-phase and installs, divides the wiring mode respectively, and wiring work is more numerous and diverse, cause mis-wired easily and influence the accuracy of metering.Because instrument transformer is different with sectional area with the wire length between electric energy meter to be caused instrument transformer actual to accept load dispersing very big, exceed it and satisfy the precision of load scope, have a strong impact on measuring accuracy, instrument transformer was difficult to be arranged in the casing of a sealing to the line of electric energy meter in the past, stayed one section opportunity to electricity filching person.Vintage Product is realized little no-load voltage ratio metering for the multiturn punching that mostly is of little current ratio, can not eradicate and wear circle at the scene arbitrarily, thereby change the drawback that actual no-load voltage ratio causes the metering misalignment.The power supply administration that has adopts once the instrument transformer of the direct moulding by casting of circle punching again, though prevented to wear arbitrarily the drawback that circle changes no-load voltage ratio, primary connection is exposed output, and need guarantee the electric clearance greater than regulation between housing, take up room during use, easily stealing or electric shock.
The utility model content
In order to solve existing dry type mutual inductor since with electric energy meter between is connected metering misalignment that lead causes and is difficult to carry out problems such as anti-electricity-theft, the purpose of this utility model is to provide a kind of compact conformation, easy-to-connect, accurate measurement, the anti-electricity-theft three phase combined current transformer of indoor dry type.
The purpose of this utility model is achieved through the following technical solutions:
The utility model includes secondary winding, winding, secondary connection cover, and terminal board and secondary terminal board constitute external coupling part, and instrument transformer is provided with secondary terminal board corresponding with energy meter terminal row, can directly be connected usefulness with electric energy meter;
Wherein: described secondary terminal board is made up of the terminal plate that is evenly distributed;
Described secondary terminal board and energy meter terminal be exclusive to be covered with anti-electricity-theft cover;
A described terminal board is made up of with the outlet row who is located at the instrument transformer bottom the lead-in line row that is located at instrument transformer top, and lead-in line row and exclusive portion of outlet are enclosed with the insulating case of sealing; Be located on the secondary winding of instrument transformer inside and be tied with winding one time, one time winding links to each other with a lead-in line row, outlet row respectively, is equipped with the secondary connection cover at the leading-out terminal of secondary winding; On the pour mass of instrument transformer, be cast with nominal transformation ratio;
On instrument transformer, be equipped with the direction recess of installation electric energy meter and the fixture of stationary electric table.
Advantage of the present utility model and good effect are:
1. the constancy of no-load voltage ratio.The utility model is cast in winding, a secondary winding in the insulator, has solved existing product and can wear circle at the scene arbitrarily, thereby changed actual no-load voltage ratio, causes problems such as metering misalignment.
2. the no-load voltage ratio sign is permanent.The utility model is cast in nominal transformation ratio on the pour mass and directly waters out the no-load voltage ratio sign on instrument transformer, has effectively stopped existing product and has been changed the nameplate no-load voltage ratio and the shortcoming of stealing easily.
With supporting electric energy meter form integrated.The utility model cooperates with the three-phase and four-line electric multi-functional electric energy meter is integrated, compact conformation, make electric power meter than existing numerous and diverse secondary measurement loop, it is almost nil not only to connect the lead impedance, and connected mode is unique, thereby avoided the generation of mis-wired to greatest extent, guaranteed the accuracy of electric energy metrical.
4. secondary connection of the present utility model comprises that voltage lead and current feed and electric energy meter are connected to plug-in type, and wiring position is fixing unique mode, avoids random wiring.
5. the utility model has good tightness, globality with electric energy meter on size cooperates, and terminal connections mode transparency height, has contained the generation of stealing, electric shock phenomenon effectively.
6. the utility model is simple in structure, has convenience, safe and reliable operability.Simplified the execute-in-place that comprises a punching in addition, connected power supply and the load line that adds insulation, can guarantee that reliably normal operation can guarantee electric energy metrical accurately again by sign.
7. the secondary connection between the utility model and electric energy meter is finished before dispatching from the factory, has saved the process that connects secondary circuit at the scene.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present utility model;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is an internal structure schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
The utility model is that indoor epoxide resin vacuum is cast in the totally-enclosed multiple circle penetration type structure of one-tenth in the insulator with winding 2, a secondary winding 1, does low-tension current, electric energy metrical use after cooperating with the three-phase and four-line electric multi-functional electric energy meter is integrated.
As Fig. 1, shown in Figure 4, the utility model includes secondary winding, winding, secondary connection cover, and terminal board and secondary terminal board constitute external coupling part.Wherein: instrument transformer is provided with secondary terminal board 6 corresponding with energy meter terminal row, can directly be connected usefulness with electric energy meter.Secondary terminal board 6 is made up of the terminal plate that is evenly distributed.And be covered with anti-electricity-theft cover 5 in that secondary terminal board 6 and energy meter terminal are exclusive.Terminal board is made up of with the outlet row 8 who is located at the instrument transformer bottom a lead-in line row 4 that is located at instrument transformer top, and a lead-in line row 4 and an outlet are arranged the insulating case that 8 outsides are closed and wrapped up; Be located at and be tied with 2, windings 2 of a winding on the secondary winding 1 of instrument transformer inside and link to each other with lead-in line row 4, an outlet row 8 respectively, be equipped with secondary connection cover 3 at the leading-out terminal of secondary winding 1; On the pour mass of instrument transformer, be cast with nominal transformation ratio 9.On instrument transformer, be equipped with the direction recess 10 of installation electric energy meter and the fixture 7 of stationary electric table.
The utility model mainly adopts and rolls iron core winding, utilize the electromagnetic conversion principle, make electric current secondary part can reflect the situation of change of primary current exactly, and carry out rational electric connection in instrument transformer internal condition three-phase and four-line principle, instrument transformer is directly cooperated with three-phase four system electric energy meters be one.Voltage a, b, c, n are connected on secondary winding 1 and the winding 2 by copper cash cover insulated tube respectively, and A, B, C three are connected together and draw, and are marked with sign in remarkable position, pour mass side, and nominal transformation ratio is cast on the pour mass.Electric current, voltage secondary terminal board 6 are drawn in the terminal box by the poured with epoxy resin moulding, during use supporting three-phase and four-line electric multi-functional electric energy meter are installed in three direction recess 10 on the instrument transformer.The secondary terminal board that will correspondingly with electric energy meter be evenly distributed 6 directly inserts in the electric energy meters, and anti-electricity-theft cover 5 on the face shield outside.At last, electric energy meter is fixing with fixture 7.Fixture of the present utility model can adopt screw, hook, bolt etc., also can adopt welding manner directly electric energy meter to be welded on the instrument transformer.Connecting the power supply and the load line that add insulation by sign then gets final product.The utility model has been simplified and has been comprised the execute-in-place of once wearing circle, can guarantee that reliably normal operation can guarantee correct electric current, electric energy metrical again, improved the reliability of power supply greatly, can be widely used in the metering of distribution transformation and commercial residential building sub-district and transform and urban network restructuring.
Claims (5)
1. the three phase combined current transformer of indoor dry type, include secondary winding, winding, secondary connection cover, terminal board and secondary terminal board constitute external coupling part, it is characterized in that: instrument transformer is provided with secondary terminal board (6) corresponding with energy meter terminal row, can directly be connected usefulness with electric energy meter.
2. according to the three phase combined current transformer of the described indoor dry type of claim 1, it is characterized in that: described secondary terminal board (6) is made up of the terminal plate that is evenly distributed.
3. according to the three phase combined current transformer of the described indoor dry type of claim 1, it is characterized in that: described secondary terminal board (6) and the exclusive anti-electricity-theft cover (5) that is covered with of energy meter terminal.
4. according to the three phase combined current transformer of the described indoor dry type of claim 1, it is characterized in that: a described terminal board is made up of with the outlet row (8) who is located at the instrument transformer bottom a lead-in line row (4) that is located at instrument transformer top, and a lead-in line row (4) and outlet row (8) external packets are wrapped with the insulating case of sealing; Be located on the secondary winding (1) of instrument transformer inside and be tied with a winding (2), a winding (2) links to each other with a lead-in line row (4), outlet row (8) respectively, is equipped with secondary connection cover (3) at the leading-out terminal of secondary winding (1); On the pour mass of instrument transformer, be cast with nominal transformation ratio (9).
5. according to the three phase combined current transformer of the described indoor dry type of claim 1, it is characterized in that: on instrument transformer, be equipped with the direction recess (10) of installation electric energy meter and the fixture (7) of stationary electric table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420030350 CN2684351Y (en) | 2004-02-13 | 2004-02-13 | Indoor dry three-phase combined current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420030350 CN2684351Y (en) | 2004-02-13 | 2004-02-13 | Indoor dry three-phase combined current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2684351Y true CN2684351Y (en) | 2005-03-09 |
Family
ID=34607229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420030350 Expired - Lifetime CN2684351Y (en) | 2004-02-13 | 2004-02-13 | Indoor dry three-phase combined current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2684351Y (en) |
-
2004
- 2004-02-13 CN CN 200420030350 patent/CN2684351Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140213 Granted publication date: 20050309 |
|
| CX01 | Expiry of patent term |