CN2049819U - Low-voltage current mutual inductor for measuring electric energy - Google Patents
Low-voltage current mutual inductor for measuring electric energy Download PDFInfo
- Publication number
- CN2049819U CN2049819U CN 89204034 CN89204034U CN2049819U CN 2049819 U CN2049819 U CN 2049819U CN 89204034 CN89204034 CN 89204034 CN 89204034 U CN89204034 U CN 89204034U CN 2049819 U CN2049819 U CN 2049819U
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- iron core
- winding
- electric energy
- mutual inductor
- voltage current
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Abstract
The utility model belongs to a low-voltage mutual inductor for measuring electric energy, which comprises a casing, a footing rack, a main iron core, an auxiliary iron core, an auxiliary winding, a primary winding, a secondary winding and a label, wherein, the main iron core is wound with the secondary winding, and is sheathed with the auxiliary iron core at the periphery. The primary winding and the secondary winding are wound on the main iron core and the auxiliary iron core. A compensation winding is wound on the auxiliary iron core, and the casing is composed of two bakelite components which are pressed. The connection nose of the secondary winding, the footing rack and the label are fixed on the casing by screw bolts and nuts. The utility model has the advantages of simple structure, light weight and convenient installation, and can improve the accuracy by 0.2-0.05 level.
Description
The utility model belongs to a kind of electric energy measurement low-voltage current mutual inductor.
At present, the most iron core of the current transformer of domestic production is to be changed by the bar shaped silicon steel sheet.Two posts up and down that divide unshakable in one's determination all are with secondary coil, and primary winding only is arranged in outside the secondary coil of a upper prop.A pair of folder unshakable in one's determination is washed into dihedral with steel plate and uses base as fixing, has installing hole.An outlet is furnished with the annex of making fastening usefulness.As LQG-0.5 type current transformer.This current transformer material therefor is many, and moulding is not attractive in appearance, and installation direction has only a kind of direction, immobilize, and accuracy rating is 0.5 grade.
The purpose of this utility model is exactly in order to overcome above shortcoming, designs a kind of saving material, and simple in structure, easy for installation, handsome in appearance, accuracy rating can be brought up to 0.2～0.05 grade measurement low-voltage current mutual inductor.
The utility model includes shell 1, footing frame 3, main iron core 5, auxiliary iron core 6(magnetic shunt), winding 8, secondary winding 7,10, compensation winding 9(magnetic shunt short circuit circle), label 3 forms.Be wound with secondary winding N on the main iron core 5
b7, add around auxiliary iron core 6 in the periphery of main iron core 5, main iron core 5 and auxiliary iron core are the ring-type iron core.A winding N
18, secondary winding N
2, N
2-110 on main iron core 5 and auxiliary iron core 6.One time winding is by multiple conducting wires and around forming.A winding N
1Two joints of 8 are welded on the primary winding Wiring nose 2 secondary winding N respectively
2, N
2-1Two joints of 10 are welded on the secondary coil Wiring nose 4 secondary winding N respectively
2And N
2-1The 10th, adopt more than two lead and around, and secondary winding N
2-1Than secondary winding N
2A few circle.Compensation winding 9 is on auxiliary iron core 6.Shell 1 is made up of two blocks of insulating material.Can adopt the bakelite compacting to form.Secondary coil Wiring nose 2, footing frame 3 and label 13 are fixed on the shell 1 by bolt 12 and nut 11.For easy for installation, footing frame 3 can be fixed on bottom surface or the side of electric energy measurement with low-voltage current mutual inductor.Footing frame and label are installed are adopted bolt for one section, be screwed in footing frame and label on the nut bore fixing at tapping button on the shell by bolt, because the most bakelites that adopt of shell, the easy knot that can be undone by a pull of screw thread, make the footing frame loosening, so cooperation of fixedly adopting screw bolt and nut of the present utility model, promptly nut 11 is placed in the nut putting hole 14 of shell 1 in advance, bolt 12 puts secondary coil Wiring nose 2, be screwed on the nut 11 behind footing frame 3 and the label 13, because nut 11 is to be made by metal material, so be difficult for knot that can be undone by a pull.
The utility model is not only in light weight but also handsome in appearance, simple in structure, easy for installation compared with similar products, and main is can be accuracy height to 0.2～0.05 grade.As: rated load is 75/5 current transformer of 0.2 Ω, and former instrument transformer is 0.5 grade, and silicon steel sheet needs 0.9kg, copper cash 0.75kg, gross weight 1.9kg, and this instrument transformer is 0.2 grade, and silicon steel sheet needs 0.5kg, copper cash 0.4kg, gross weight 1.2kg.
The embodiment represented below in conjunction with accompanying drawing 1-6 further describes the utility model.
Accompanying drawing 1 is a front view of the present utility model
Wherein:
1---shell 2---primary winding Wiring nose
3---footing frame 4---secondary coil Wiring nose
Accompanying drawing 2 is an installation diagram of the present utility model:
Wherein:
5---main iron core 6---auxiliary iron cores (magnetic shunt)
7---secondary winding N
b8---a winding N
1
9---compensation winding N
B2(magnetic shunt short circuit circle)
10---secondary winding N
2And N
2-1
11---nut 12---bolt
13---label
Accompanying drawing 3 is the front view of shell 1.
Wherein: 14---the nut putting hole
Accompanying drawing 4 is the left view of shell 1.
Accompanying drawing 5 is the profile of accompanying drawing 3 along the AA hatching.
Accompanying drawing 6 is a schematic diagram of the present utility model.
Embodiment of the present utility model is as follows:
LQG-0.66,0.2 grade of current ratio is 75/5, rated load is the electric energy measurement low-voltage current mutual inductor of 0.2 Ω.Main iron core 5 is of a size of φ 39/ φ 73 * 20, and material is a cold-reduced silicon sheet.Auxiliary iron core 6 is of a size of φ 77/79 * 30, and material is a cold-reduced silicon sheet.A winding N
15 leads of 8 usefulness and around the secondary coil skin, the number of turn is 4 circles.Secondary winding N
bFour leads of 7 usefulness and around 9 circles, secondary winding N
2And N
2-110 still use these four leads and around 51 circles, wherein one few around a circle.Compensation winding N
B2The copper sheet welding of 9 usefulness 10 * 0.2, the number of turn are a circle.Footing frame 3 is installed in the side of electric energy measurement with the low pressure instrument transformer.Nut putting hole 14 on the shell 1 is the hex nut hole, and nut 11 is selected hex nut for use.
To LQG-0.66, the electric energy measurement of current ratio 75/5 rated load 0.2 Ω meets 0.2 grade standard requirement with low-voltage current mutual inductor test error result according to the People's Republic of China (PRC), standard GB 1208-87 and People's Republic of China's metering appliance detecting rules " Verification of Measuring Current Transformer ".
Test result is as follows:
Claims (7)
1, a kind ofly includes the electric energy measurement low-voltage current mutual inductor that shell 1, footing frame 3, main iron core 5, auxiliary iron core 6, winding 8, secondary winding 7,10, compensation winding 9 and a label 13 are formed, it is characterized in that being wound with on the main iron core 5 secondary winding N
b7, add around 6, winding N of auxiliary iron core in the periphery of main iron core 5
18, secondary winding N
2N
2-110 on main iron core 5 and auxiliary iron core 6, compensation winding N
B29 on auxiliary iron core 6, and shell 1 is made up of two insulating material spares, and secondary coil Wiring nose 4, footing frame 3 and label 13 are fixed on the shell 1 by bolt 12 and nut 11.
2, electric energy measurement low-voltage current mutual inductor according to claim 1.It is characterized in that main iron core 5 and auxiliary iron core 6 are the ring-type iron core.
3, electric energy measurement low-voltage current mutual inductor according to claim 1.It is characterized in that shell 1 is made up of the bakelite spare that compacting forms, also can adopt fiberglass, plastic or other material to form.
4, electric energy measurement low-voltage current mutual inductor according to claim 1 is characterized in that footing frame 3 can be fixed on bottom surface or the side of electric energy measurement with low-voltage current mutual inductor by bolt 12 and nut 11.
5, electric energy measurement low-voltage current mutual inductor according to claim 1 is characterized in that the fixing nut 11 of secondary coil Wiring nose 2, footing frame 3 and label 13 is to be placed in advance in the nut putting hole 14 of shell 1.
6, electric energy measurement low-voltage current mutual inductor according to claim 1 is characterized in that secondary winding N
2And N
2-1, the 10th, adopt more than two lead and around.And secondary winding N
2-1Than secondary winding N
2A few circle.
7, electric energy measurement low-voltage current mutual inductor according to claim 1 is characterized in that a winding is by multiple conducting wires and around forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89204034 CN2049819U (en) | 1989-04-07 | 1989-04-07 | Low-voltage current mutual inductor for measuring electric energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89204034 CN2049819U (en) | 1989-04-07 | 1989-04-07 | Low-voltage current mutual inductor for measuring electric energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2049819U true CN2049819U (en) | 1989-12-20 |
Family
ID=4861481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89204034 Expired - Lifetime CN2049819U (en) | 1989-04-07 | 1989-04-07 | Low-voltage current mutual inductor for measuring electric energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2049819U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064488C (en) * | 1997-03-19 | 2001-04-11 | 国际整流器有限公司 | Current sensing circuit for pulse width modulated motor drive |
| CN102360885A (en) * | 2011-07-07 | 2012-02-22 | 张逢春 | Combined current transformer |
| CN107424815A (en) * | 2017-08-18 | 2017-12-01 | 陈宇斯 | A kind of two-stage current transformer compensated using circle is subtracted |
-
1989
- 1989-04-07 CN CN 89204034 patent/CN2049819U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064488C (en) * | 1997-03-19 | 2001-04-11 | 国际整流器有限公司 | Current sensing circuit for pulse width modulated motor drive |
| CN102360885A (en) * | 2011-07-07 | 2012-02-22 | 张逢春 | Combined current transformer |
| CN107424815A (en) * | 2017-08-18 | 2017-12-01 | 陈宇斯 | A kind of two-stage current transformer compensated using circle is subtracted |
| CN107424815B (en) * | 2017-08-18 | 2019-04-30 | 陈宇斯 | A kind of two-stage current transformer compensated using circle is subtracted |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |