CN2929927Y - Transformer integrated outdoor dry type totally-enclosed three-phase current transformer - Google Patents
Transformer integrated outdoor dry type totally-enclosed three-phase current transformer Download PDFInfo
- Publication number
- CN2929927Y CN2929927Y CN 200620090738 CN200620090738U CN2929927Y CN 2929927 Y CN2929927 Y CN 2929927Y CN 200620090738 CN200620090738 CN 200620090738 CN 200620090738 U CN200620090738 U CN 200620090738U CN 2929927 Y CN2929927 Y CN 2929927Y
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- Prior art keywords
- transformer
- phase current
- enclosed
- terminal
- current transformer
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- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 10
- 238000004512 die casting Methods 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000003822 epoxy resin Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229920002379 silicone rubber 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model discloses an outdoor dry totally-enclosed three-phase current transformer of transformer integral type, A, B, C and O phase current transformer equidistance are fixed on a mounting panel, A, B, C and O phase current transformer's primary incoming line terminal is equipped with the recess of the size of cooperating with transformer secondary terminal; a primary incoming line terminal of the phase current transformers A to C is provided with a primary cover plate; a secondary cover plate is arranged on the secondary junction box; and a secondary terminal side of each primary wiring terminal is provided with a secondary wiring cable matched with the output capacity of the current transformer, one end of the secondary wiring cable is connected with a secondary wiring terminal in the secondary wiring box, the other end of the secondary wiring cable is arranged outside the secondary wiring box, and the secondary wiring box is sealed by a secondary cover plate and then fastened by a screw with a lead seal. The utility model discloses simple to operate, anti-electricity-theft, measurement are accurate, still have insulating reliable, non-maintaining and characteristics such as safe in utilization.
Description
Technical field
The utility model relates to electric power system low pressure measurement equipment, specifically can with transformer by the totally-enclosed threephase current transformer of the outdoor dry type of dressing up one.
Background technology
Low-voltage current mutual inductor is an equipment of measuring electric current, electric energy in the electric power system in city net and the rural power grids.Outdoor low voltage metering at present with the instrument transformer present situation is: 1. adopt single-phase Outdoor Current Transformer to measure; 2. measure after adopting the combination of indoor type current transformer with the low pressure combined metering box is inner; The secondary cable impedance of 3 current transformers and the output capacity of instrument transformer do not match, and cause metering inaccurate.These two kinds of methods have following deficiency: voltage signal all needs lead-in wire separately, measures of anti-stealing electricity is improper, especially need a section lead to connect from the transformation leading-out terminal to instrument transformer, and this section lead is exactly main stealing position, and be not easy to find, be the main difficult problem of puzzlement electric-power metering department all the time; Adopt the monophase current instrument transformer to assemble in addition, the operation installation specification is higher, and integrated degree is comparatively backward, safeguards and overhaul comparatively complexity of operation.
The utility model content
Be the deficiency that overcomes measures of anti-stealing electricity in the prior art and the complexity of Maintenance and Repair, the purpose of this utility model is to provide a kind of have safe in utilization, accurate measurement, the totally-enclosed threephase current transformer of transformer integral type outdoor dry type anti-electricity-theft and easy for installation.
For achieving the above object, the technical solution used in the present invention is:
A in the utility model, B, C and 0 phase current mutual inductor equidistantly are fixed on the mounting panel, and an input terminal of A, B, C and 0 phase current mutual inductor is provided with the groove with transformer secondary terminal fit dimension; An input terminal of A～C phase current mutual inductor is provided with a secondary lid.
Described A, B, C and 0 phase current mutual inductor are the totally-enclosed monomer structure that forms of cast separately, and wherein A～C phase current mutual inductor inside has winding and secondary winding, and 0 phase current mutual inductor inside is winding for once; Described secondary connection box is provided with two secondary lids; The secondary terminals side of each input terminal disposes the secondary connection cable that is complementary with the current transformer output capacity, one end of secondary connection cable links to each other with secondary connection terminal in the secondary connection box, the other end of this secondary connection cable places outside the secondary connection box, the secondary connection box is after the secondary cover plate for sealing, and is fastening by the screw of band lead sealing mouth; It is stifled to be equipped with rubber between secondary connection cable and the secondary connection box; A secondary lid of being located at an input terminal outside has seal, and is fastening by the screw of band lead sealing mouth; All be useful on the installing hole of wiring on input terminal and the outlet terminal; Distance is identical between input terminal of A, B, C and 0 phase current mutual inductor and the corresponding terminal of transformer secondary leading-out terminal; Be provided with electrorheological at the outside above the fold of current transformer and identify than number, this is designated by die casting and forms.
The utlity model has following beneficial effect and advantage:
1. easy for installation, anti-electricity-theft, accurate measurement.Directly spiral-lock is on the transformer secondary outlet terminal for the utility model, and it is integrated that realization easy for installation becomes distribution, effectively solves by switching the problem that primary connection carries out stealing; The secondary connection cable directly is with on instrument transformer, and its impedance and instrument transformer secondary output capacity are complementary, and make metering more accurate, and effectively solves by switching the problem that secondary line carries out stealing; Electrorheological is arranged than number in the outside above the fold sign of current transformer in addition,, also can prevent to reach the stealing purpose by changing the nameplate no-load voltage ratio for forming by die casting;
2. it is reliable, non-maintaining and safe in utilization to insulate: the utility model becomes totally-enclosed dry construction by epoxy resin or epoxy resin with the silicon rubber compound inslation, adopts monomer-type assembling, complicated operation, easily stealing, measures inaccurate present situation thereby changed present outdoor threephase current transformer;
3. applied widely.It is 50Hz or 60Hz that the utility model is suitable for outdoor rated frequency, and rated voltage is to do electric current, electric energy measurement use in 0.66kV and the following three-phase power circuit, is widely used in metering and transforms and increase newly in the power supply unit.
Figure of description
Fig. 1 is the utility model front view;
Fig. 2 is the utility model vertical view;
Fig. 3 is the utility model internal structure schematic diagram.
Embodiment
Shown in Fig. 1～3, the utlity model has 4 current transformers, be respectively A, B, C and 0 phase current mutual inductor 1～4, wherein A～C phase current mutual inductor inside be winding 6 and secondary winding 7 after related electric connects, the compound inslation of each personal epoxy resin or epoxy resin and silicon rubber is poured into a mould the totally-enclosed monomer structure that forms; 0 phase current mutual inductor inside is winding for once, no secondary winding; 4 current transformer secured in parallel are on a mounting panel.
An input terminal 8 of A, B, C and 0 phase current mutual inductor 1～4 is provided with groove 81, just in time cooperates with the secondary terminal of transformer, not only plays the effect of a binding post, and plays the fixedly effect of instrument transformer.Input terminal 8 peripheral hardware are cover plate 9 once, is transparent anti-electricity-theft cover plate, with fastening with the screw of band lead sealing mouth again after the sealing ring sealing; Three outlet terminals 10 are exposed copper bar, all are useful on the installing hole of wiring on input terminal 8 and the outlet terminal 10.Three outlet terminals are on a straight line parallel with horizontal plane.Be connected to secondary connection cable 5 in the secondary connection box 11, the other end of this secondary connection cable 5 places outside the secondary connection box 11, and the user directly should hold with ammeter and link to each other and can use; Not only made things convenient for terminal block, and its impedance is and the output valve of instrument transformer coupling to guarantee the precision of a whole set of metering device; On secondary connection box 11, be provided with two secondary lids 13, the same with a secondary lid 9, fastening with the screw of band lead sealing mouth again by after the sealing ring sealing, have the effect that prevents to get an electric shock and prevent stealing; Rubber is stifled 12 being equipped with between the secondary connection cable 5 and between secondary connection cable 5 and the secondary connection box 11, and energy waterproof, protection against the tide improve insulating properties of the present utility model.
Present embodiment has electrorheological than number in A, B, C phase current mutual inductor 1～3 outside above the fold sign, for forming by die casting, in case reach the stealing purpose by changing the nameplate no-load voltage ratio.
The utility model is to design according to national standard fully, employing rolls iron core, utilize electromagnetic principle, make secondary current can reflect the situation of change of primary current exactly, and provide voltage signal to electric energy meter at the utility model internal condition electrical principle, directly be installed in the outdoor three-phase line, use as current measurement and electric energy metrical.
The utility model and transformer are mounted to one, are equivalent to a measuring component on the transformer, are not connected with there being lead between the transformer, thereby it is anti-electricity-theft, safe in utilization, improved the reliability of power supply greatly, can be widely used in metering and transform and increase newly in the power supply unit.
Claims (7)
1. totally-enclosed threephase current transformer of transformer integral type outdoor dry type, A, B, C and O phase current mutual inductor equidistantly are fixed on the mounting panel, it is characterized in that: an input terminal (8) of A, B, C and O phase current mutual inductor (1～4) is provided with the groove (81) with transformer secondary terminal fit dimension; An input terminal (8) of A～C phase current mutual inductor (1～3) is provided with a secondary lid (9).
2. by the totally-enclosed threephase current transformer of the described transformer integral type of claim 1 outdoor dry type, it is characterized in that: A, B, C and O phase current mutual inductor (1～4) are for pouring into a mould the totally-enclosed monomer structure that forms separately, wherein A～C phase current mutual inductor (1～3) inside has a winding (6) and secondary winding (7), and 0 phase current mutual inductor (4) inside is winding for once.
3. by the totally-enclosed threephase current transformer of the described transformer integral type of claim 1 outdoor dry type, it is characterized in that: the secondary terminals side of each input terminal (8) disposes the secondary connection cable (5) that is complementary with the current transformer output capacity, one end of secondary connection cable (5) the secondary connection terminal interior with being located at secondary connection box (11) links to each other, the other end of this secondary connection cable (5) places outside the secondary connection box (11), secondary connection box (11) is provided with two secondary lids (13), secondary connection box (11) is after two secondary lids (13) sealing, and is fastening by the screw of band lead sealing mouth.
4. by the totally-enclosed threephase current transformer of the described transformer integral type of claim 3 outdoor dry type, it is characterized in that: be equipped with rubber stifled (12) between secondary connection cable (5) and the secondary connection box (11).
5. by the totally-enclosed threephase current transformer of the described transformer integral type of claim 1 outdoor dry type, it is characterized in that: be located at the outside secondary lid (9) of an input terminal (8) and have seal, fastening by the screw of band lead sealing mouth; All be useful on the installing hole of wiring on an input terminal (8) and the outlet terminal (10).
6. by the totally-enclosed threephase current transformer of the described transformer integral type of claim 1 outdoor dry type, it is characterized in that: between an input terminal (8) of A, B, C and O phase current mutual inductor (1～4) and the corresponding terminal of transformer secondary leading-out terminal apart from identical.
7. by the totally-enclosed threephase current transformer of the described transformer integral type of claim 1 outdoor dry type, it is characterized in that: be provided with electrorheological at the outside above the fold of current transformer and identify than number, this is designated by die casting and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620090738 CN2929927Y (en) | 2006-05-10 | 2006-05-10 | Transformer integrated outdoor dry type totally-enclosed three-phase current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620090738 CN2929927Y (en) | 2006-05-10 | 2006-05-10 | Transformer integrated outdoor dry type totally-enclosed three-phase current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2929927Y true CN2929927Y (en) | 2007-08-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620090738 Expired - Lifetime CN2929927Y (en) | 2006-05-10 | 2006-05-10 | Transformer integrated outdoor dry type totally-enclosed three-phase current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2929927Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779459A (en) * | 2011-05-12 | 2012-11-14 | 重庆华虹仪表有限公司 | Embedding method for pouring nameplates of device |
| CN103513084A (en) * | 2013-09-25 | 2014-01-15 | 国家电网公司 | Three-phase electric energy meter on-site calibration instrument detachable current transformer |
-
2006
- 2006-05-10 CN CN 200620090738 patent/CN2929927Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779459A (en) * | 2011-05-12 | 2012-11-14 | 重庆华虹仪表有限公司 | Embedding method for pouring nameplates of device |
| CN103513084A (en) * | 2013-09-25 | 2014-01-15 | 国家电网公司 | Three-phase electric energy meter on-site calibration instrument detachable current transformer |
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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 |
Granted publication date: 20070801 |
|
| EXPY | Termination of patent right or utility model |