CN202757979U - DC mutual inductor for sensing abrupt current - Google Patents
DC mutual inductor for sensing abrupt current Download PDFInfo
- Publication number
- CN202757979U CN202757979U CN 201220432274 CN201220432274U CN202757979U CN 202757979 U CN202757979 U CN 202757979U CN 201220432274 CN201220432274 CN 201220432274 CN 201220432274 U CN201220432274 U CN 201220432274U CN 202757979 U CN202757979 U CN 202757979U
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- magnet ring
- mutual inductor
- current
- sensing
- utility
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Abstract
The utility model relates to the power supply design technology, particularly to a DC mutual inductor for sensing abrupt current. The DC mutual inductor, composed of a magnet ring (1) and an induction coil (2) wound upon the magnet ring (1), is characterized in that the magnet ring (1) is made of the iron silicon aluminium magnetic material, with the cross sectional area ranging from 100 to 200 square mm; the wire diameter of the enamelled wire of the induction coil (2) ranges from 0.2 to 0.4 mm; and the number of windings ranges from 800 to 1200. The DC mutual inductor of the utility model is capable of sensing the abrupt current value of the direct current experiencing earth fault, thereby accurately determining whether the feed line experiences normal load change or experiences earth fault, and eliminating the potential hazards.
Description
Technical field
The utility model is the Power Management Design technology, relates to a kind of direct current instrument transformer of responding to mutation current.
Background technology
In the aviation power system, the Dyn. output terminal is one of groundwork of doing for raising airplane power source reliability in recent years to the protection for feed line of bus-bar.Because the direct current of feeder line transmission current break when earth fault occurs is very large, and the time is very short, general mutual inductor can not be measured the current value of sudden change exactly, therefore can't judge that feeder line is normal load variations or earth fault has occured, and exists potential safety hazard.Therefore, aviation power system requires to measure accurately the size of mutation current value.
Summary of the invention
The purpose of this utility model is: propose a kind of direct current instrument transformer that can respond to the mutation current value, to measure accurately the size of mutation current value, eliminate safe hidden trouble.
The technical solution of the utility model is: a kind of direct current instrument transformer of responding to mutation current, and it is comprised of a magnet ring 1 and the inductive coil 2 that is wrapped on the magnet ring 1; It is characterized in that: magnet ring 1 is made by iron sial magnetic material, and the transversal of magnet ring 1 is rectangle or circle, cross-sectional area S=100mm
2～200mm
2, the inner diameter d=50mm of magnet ring 1～80mm, the outer diameter D=80mm of magnet ring 1～120mm; The wire diameter δ of inductive coil 2 enameled wires=0.2mm～0.4mm, number of turn n=800～1200.
The utility model has the advantages that: can respond to the mutation current value of direct current when earth fault occurs, thereby judge that accurately feeder line is normal load variations or earth fault has occured, and has eliminated potential safety hazard.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The below is described in further details the utility model.Referring to Fig. 1, a kind of direct current instrument transformer of responding to mutation current, it is comprised of a magnet ring 1 and the inductive coil 2 that is wrapped on the magnet ring 1; It is characterized in that: magnet ring 1 is made by iron sial magnetic material, and the transversal of magnet ring 1 is rectangle or circle, cross-sectional area S=100mm
2～200mm
2, the inner diameter d=50mm of magnet ring 1～80mm, the outer diameter D=80mm of magnet ring 1～120mm; The wire diameter δ of inductive coil 2 enameled wires=0.2mm～0.4mm, number of turn n=800～1200.
Embodiment 3, and the output-current rating of Dyn. is 600A, and magnet ring 1 is made by iron sial magnetic material, and the transversal of magnet ring 1 is rectangle, cross-sectional area S=160mm
2, the inner diameter d=70mm of magnet ring 1, the outer diameter D=110mm of magnet ring 1; The wire diameter δ of inductive coil 2 enameled wires=0.35mm, number of turn n=1200.When output current sudden change 130A, transformer induced current waveform amplitude 0.12A.
Claims (1)
1. direct current instrument transformer of responding to mutation current, it is comprised of a magnet ring (1) and the inductive coil (2) that is wrapped on the magnet ring (1); It is characterized in that: magnet ring (1) is made by iron sial magnetic material, and the transversal of magnet ring (1) is rectangle or circle, cross-sectional area S=100mm
2～200mm
2, the inner diameter d=50mm of magnet ring (1)～80mm, the outer diameter D=80mm of magnet ring (1)～120mm; The wire diameter δ of inductive coil (2) enameled wire=0.2mm～0.4mm, number of turn n=800～1200.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432274 CN202757979U (en) | 2012-08-28 | 2012-08-28 | DC mutual inductor for sensing abrupt current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432274 CN202757979U (en) | 2012-08-28 | 2012-08-28 | DC mutual inductor for sensing abrupt current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202757979U true CN202757979U (en) | 2013-02-27 |
Family
ID=47737151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220432274 Expired - Fee Related CN202757979U (en) | 2012-08-28 | 2012-08-28 | DC mutual inductor for sensing abrupt current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202757979U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599280A (en) * | 2018-05-02 | 2018-09-28 | 华北电力大学 | The online power-supply circuit of DC transmission system current limiter and system |
| CN112750662A (en) * | 2021-02-08 | 2021-05-04 | 哈尔滨工业大学 | Load current detection coil applied to alternating current bus bar type electromagnetic contactor |
-
2012
- 2012-08-28 CN CN 201220432274 patent/CN202757979U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599280A (en) * | 2018-05-02 | 2018-09-28 | 华北电力大学 | The online power-supply circuit of DC transmission system current limiter and system |
| CN112750662A (en) * | 2021-02-08 | 2021-05-04 | 哈尔滨工业大学 | Load current detection coil applied to alternating current bus bar type electromagnetic contactor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20130828 |