CN1013907B - Leakage-current mutual-inductor - Google Patents
Leakage-current mutual-inductorInfo
- Publication number
- CN1013907B CN1013907B CN 86108320 CN86108320A CN1013907B CN 1013907 B CN1013907 B CN 1013907B CN 86108320 CN86108320 CN 86108320 CN 86108320 A CN86108320 A CN 86108320A CN 1013907 B CN1013907 B CN 1013907B
- Authority
- CN
- China
- Prior art keywords
- leakage
- current mutual
- determination
- coil
- inductor
- 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
Links
Landscapes
- Transformers For Measuring Instruments (AREA)
- Breakers (AREA)
Abstract
The present invention proposes a kind of leakage-current mutual-inductor.Its feature: materials unshakable in one's determination are electrical pure iron or casting Alsimin.Coil can be prefabricated, at last with the iron core assembled formation.
This has not only reduced cost significantly, and helps to improve the quality.For improving the technical and economic performance of electric apparatus of electric leakage protection, provide realistic plan.
Description
The present invention relates to a kind of zero sequence current mutual inductor that is used for the earth leakage protective field.
Usually, as the core-zero sequence current mutual inductor of leakage switch (1), be to roll with very thin permalloy tape material to be the ring seal iron core, then, use thin wire round winding around unshakable in one's determination.Here there are two problems that wait to solve:
1. the permalloy material is very expensive, and the magnetic affected by force is very big.
2. the thin material of this thickness a few tenths of a mm only should be fabricated to integrally closed iron core, so that coil winding is extremely inconvenient.
In recent years, though developed a kind of amorphous soft magnetic alloy material that is called, there is a change for the better, can not thoroughly deal with problems, and can not satisfy the needs of growing electric utility at all.
Task of the present invention is: improve design, reduce the requirement to manufacturing process, improve the technical-economic index of product.
The design is from selection.With electrical pure iron DT
3, DT
4Series plate and casting Alsimin replace permalloy and amorphous alloy; With the integrally closed iron core of assembly type replacement unshakable in one's determination; The independent coiling of coil.Assemble moulding at last.
I experiment showed, the zero sequence current mutual inductor that is used for leakage switch, imitate μ as long as its core material has higher first magnetic conduction
o, less coercive force H
cJust can.Electrical pure iron DT
3, DT
4Be that good direct current soft magnetic material (2) also just in time is applicable to above-mentioned occasion.Its μ
oThough value is low than amorphous alloy and permalloy, this is easy to compensate.Because the performance of electrical pure iron is much stable than alloy, handles and also be not difficult.Particularly it is very cheap, and price has only 1/tens of permalloy, is easily so improve total magnetic conduction effect unshakable in one's determination.
As for the eddy current effect of electrical pure iron in alternating magnetic field, as heating, energy consumption etc., this can not consider under above-mentioned service condition in advance.Because in the electric leakage instrument transformer of earth leakage circuit-breaker, can not allow excessive alternating magnetic field exist down constantly.In case reach the leakage current of operating value, will cause the reaction of switch protection, the instantaneous trip circuit.
For the electric leakage instrument transformer that is used in the big system, may pass through bigger leakage current.At this moment, select for use casting Alsimin material to get final product.
The pure iron plate is easy to shaping by stock removal, and annealing in process is less demanding at last.For simplifying the production technology of coil, iron core should be made two parts.During combination, fastening with screw.As pressing from both sides with rubber sheet gasket, also can play the effect of adjusting the iron circuit characteristic at two junction.Coil can also can use the coil rack coiling directly on iron core, which kind of method that don't work can both utilize common semi-mechanization coil winding machine to realize mass production.
This shows that instrument transformer adopts after the design form of this assembling, not only alleviated the difficulty of technical process widely, also eliminated the dependence of product quality technology mode.Owing to also coiling in advance of primary winding, its number of turn can increase according to the raising of leakage switch sensitivity again, compared with old-fashioned closed ring structure, sensitive, makes things convenient for manyly again.
Annotate: (1) sees " low-voltage electrical apparatus " electric leakage protection technology collected works Shanghai Electric Appliances Science Inst
(2) see " high and low voltage electrical equipment design manual " P573-580 China Machine Press
Claims (3)
1, leakage-current mutual-inductor provided by the present invention is made up of with coil unshakable in one's determination, and its principal character is: core material is electrical pure iron or casting Alsimin.
2, the instrument transformer according to claim 1 is characterized in that the knock-down fabricated construction that is unshakable in one's determination, and coil and iron core are made respectively.
3, the instrument transformer according to claim 2 is characterized in that composition surface unshakable in one's determination air gap can borrow the trip bolt of iron core regulate, with its characteristic of adjusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108320 CN1013907B (en) | 1986-12-03 | 1986-12-03 | Leakage-current mutual-inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86108320 CN1013907B (en) | 1986-12-03 | 1986-12-03 | Leakage-current mutual-inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86108320A CN86108320A (en) | 1987-07-22 |
| CN1013907B true CN1013907B (en) | 1991-09-11 |
Family
ID=4803881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86108320 Expired CN1013907B (en) | 1986-12-03 | 1986-12-03 | Leakage-current mutual-inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013907B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089110C (en) * | 1995-03-14 | 2002-08-14 | 埃克森美孚化学专利公司 | Polyol ester compositions with unconverted hydroxyl groups |
| CN1093875C (en) * | 1996-12-20 | 2002-11-06 | 花王株式会社 | Lubricating oil for water-dispersed cold rolling oil for steel and method for cold rolling steel sheet |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403095A (en) * | 2011-11-21 | 2012-04-04 | 江苏大德重工有限公司 | Rod-like direct current reactor iron core |
| CN105699791A (en) * | 2014-11-24 | 2016-06-22 | 国网河南省电力公司平顶山供电公司 | DSP-based electric energy quality online monitor |
-
1986
- 1986-12-03 CN CN 86108320 patent/CN1013907B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089110C (en) * | 1995-03-14 | 2002-08-14 | 埃克森美孚化学专利公司 | Polyol ester compositions with unconverted hydroxyl groups |
| CN1093875C (en) * | 1996-12-20 | 2002-11-06 | 花王株式会社 | Lubricating oil for water-dispersed cold rolling oil for steel and method for cold rolling steel sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN86108320A (en) | 1987-07-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |