CN201465789U - Open type current mutual inductor - Google Patents
Open type current mutual inductor Download PDFInfo
- Publication number
- CN201465789U CN201465789U CN2009201084371U CN200920108437U CN201465789U CN 201465789 U CN201465789 U CN 201465789U CN 2009201084371 U CN2009201084371 U CN 2009201084371U CN 200920108437 U CN200920108437 U CN 200920108437U CN 201465789 U CN201465789 U CN 201465789U
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- semi
- ring shape
- round ring
- open type
- mutual inductor
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Abstract
The utility model provides an open type current mutual inductor which comprises two semicircular shells, wherein an iron core and a secondary winding which is wound on the iron core are arranged in the semicircular shells, and are cast in the corresponding semicircular shells in vacuum through epoxy resin, one ends of the two semicircular shells are hinged with each other, and the other ends thereof are docked, thereby forming a ring-shaped shell, the end surface of the shell is an epoxy resin surface, a fastening piece is arranged on the epoxy resin surface, one side of the epoxy resin surface is provided with three connecting terminals, and the outsides of the two semicircular shells are provided with anchor ears for connecting the two semicircular shells into a shell. The open type current mutual inductor cancels slots and a rubber pipe on the inner side of the shell, can be conveniently fast installed, shortens the inner circle section area, enlarges the effective magnetic flux section area of the iron core, improves the measurement precision, selects the connecting terminals according to the capacity of tested load as three connecting terminals are provided, can set different connection modes, and improves the stability.
Description
Technical field
The utility model relates to a kind of Open Type Electric Current Mutual Inductor, mainly can be used for carrying out in the power grid cables detection of electric current.
Background technology
Electric current has from several the peace to several Wan An in the circuit of power consumption; measure for the ease of secondary meter; need be converted to more unified electric current; voltage on the circuit is all than higher in addition; if it is breakneck directly measuring, the electric power system instrument transformer is with the electrical network high voltage, the information of electric current is delivered to metering, measuring instrument and the relaying protection of low-voltage, little electric current secondary side, a kind of special transformer of automatics greatly.Current transformer is exactly that the voltage of primary system, current information are delivered to the secondary side relevant device exactly, with the high voltage of primary system, big current transformation is the low-voltage (standard value) of secondary side, little electric current (standard value), make device standardization, miniaturizations such as measurement, measuring instrument and relay, and reduced insulating requirements secondary device; Secondary device and electrical secondary system and primary system high-tension apparatus are well isolated aspect electric, thereby guaranteed the safety of the secondary device and the person.
Open Type Electric Current Mutual Inductor is applicable to current measurement, signals collecting and the Microcomputer Protection of AC electric power systems 10kV and the following electric equipment of 10kV.The inboard of the annular outer cover of existing Open Type Electric Current Mutual Inductor is provided with slot, is provided with to have big toughness and flexible rubber tube in slot, and these rubber tubes can well be adjacent to tested cable, anti-sliding stop.A kind of Open Type Electric Current Mutual Inductor is disclosed as No. 01238879.3 utility model patent specification of China, it comprises two semi-round ring shape iron cores, fill out by epoxy resin mixed glue and to be enclosed in two semi-round ring shape plastic housings, the inside circumference of annular plastics shell is distributed with three jaw type slots symmetrically, plugs a Ω shape rubber ring and be used for fixing cable in this slot.Yet the shortcoming of this structure is, because ring-shaped inner part is provided with rubber tube, makes that the annular outer cover inner ring surface of instrument transformer is long-pending bigger, thereby has reduced the cross-sectional area of the iron core in the toroidal shell, has influenced the precision of measuring.In addition, two binding posts of the many employings of this instrument transformer have adopted the identical mode of connection for the load with different capabilities, have influenced the stability of current transformer.
Summary of the invention
In order to improve the appeal shortcoming of prior art, the utility model provides a kind of Open Type Electric Current Mutual Inductor, this current transformer has changed the insertion slot type mounting means, on the poured with epoxy resin face, install, make installation more efficient and convenient, increase the sectional area of annular core, increase the capacity of current transformer, and can improve the stability of current transformer according to the different mode of connection of different choice of the capacity of the load that is connect.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of Open Type Electric Current Mutual Inductor, it is made of two semi-round ring shape housings, be provided with iron core and secondary winding in the described semi-round ring shape housing, described iron core and secondary winding are cast in the corresponding semi-round ring shape housing with epoxide resin vacuum, one end of described two semi-round ring shape housings is hinged, the other end is involutory mutually, form toroidal shell, the leading-out terminal front cover of described housing is the epoxy resin face, described epoxy resin face is provided with securing member, described leading-out terminal is provided with outlet terminal, the outside of described toroidal shell is provided with described two semi-round ring shape housing hoops anchor ear together, and the buckle mechanism of described anchor ear is positioned at the involutory end of described two semi-round ring shape housings, is equipped with draw-in groove on the circumference of described two semi-round ring shape hull outside faces, the draw-in groove of two semicircular shells is interconnected to form annular, and described anchor ear embeds in the described draw-in groove.
Described securing member is divided into not moving part and movable piece.
Described not moving part is fixed on the epoxy resin face of a described semi-round ring shape housing, and described movable piece is connected with described not moving part with screw.
Described outlet terminal is three.
The middle part of described two semi-round ring shape hull outside faces.
The draw-in groove at the middle part of described two semi-round ring shape hull outside faces to fashionable mutual butt joint, forms a complete annular slot at two semi-round ring shape housings.
The main part of described anchor ear adopts steel band, and described hasp adopts metal structure.
The width of described draw-in groove slightly is wider than the width of described anchor ear.
The beneficial effects of the utility model are: owing to changed original insertion slot type mounting means, change on the annular resin casting area and installing, make installation more quick, adopt this mode, reduced the internal diameter of current transformer, increase the net sectional area of the iron core in the toroidal shell, and then increased the capacity of current transformer, improved the certainty of measurement of current transformer.In addition, owing to adopted three terminals, can select different load wiring modes, current transformer has been played the effect of protecting, improve the stability of current transformer, make the linearity of current transformer better according to the size of the capacity of connecing load.
Description of drawings
Fig. 1 is the schematic diagram of Open Type Electric Current Mutual Inductor of the present utility model.
Embodiment
Referring to Fig. 1, the utility model provides a kind of Open Type Electric Current Mutual Inductor, it is by two semi-round ring shape housings 1,2 constitute, be equipped with in the two semi-round ring shape housings separately iron core and with the supporting secondary winding of iron core, iron core and secondary winding by poured with epoxy resin in semi-round ring shape housing 1 and 2, the diagram end face is an epoxy resin face 3, on epoxy resin face 3, be separately installed with the not moving part 4 and the movable piece 5 of securing member, preferably, moving part 4 is fixed on the epoxy resin face 3 to utilize screw 6 to incite somebody to action not, utilize screw 7 that movable piece 5 is connected in not moving part 4 again, when semi-round ring shape housing 1 and 2 closures, can utilize screw 7 not moving part 4 and movable piece 5 tighten, make current transformer can be well secured on the tested cable.
Two semi-round ring shape housings 1 and an end of 2 are hinged, the other end is involutory mutually, form toroidal shell, the outside of the toroidal shell of being made up of semi-round ring shape housing 1 and semi-round ring shape housing 2 is provided with two semi-round ring shape housing hoops anchor ear 8 together, the theme part of anchor ear 8 can adopt steel band usually, and hasp 9 also can adopt metal structure.The hasp 9 of anchor ear 8 is positioned at the involutory end of two semicircular shells 1 and 2, be equipped with draw-in groove 10 on the circumference of two semicircular shells 1 and 2 lateral surface, two semicircular shells 1 and 2 draw-in groove 8 are interconnected to form cannelure, anchor ear 8 embeds in the draw-in groove 10, the width of draw-in groove 10 should slightly be wider than anchor ear 8, so that can put into anchor ear 8 easily, and anchor ear 8 can not arbitrarily be rocked.
Draw-in groove 10 can be positioned at the middle part of the lateral surface of semi-round ring shape housing 1 and 2 usually, draw-in groove 10 on two semi-circular housings 1 and 2 at the two halves toroidal shell to fashionable also butt joint mutually, form a complete annular slot, form a ring seal magnetic circuit thus, help improving the detection effect around described housing (and the interior iron core of housing and secondary winding).
Side at epoxy resin face 3, be provided with leading-out terminal 11, leading-out terminal 11 is provided with three binding posts and is respectively S1, S2, S3, size according to the capacity of tested load is selected binding post, determine the mode of connection, preferably, when the capacity of tested load 〉=2.5Var, secondary load is connected on S1 and the S2 terminal; When the capacity of measured load≤1.5Var, secondary load is connected on S1 and the S3 terminal; When capacity＞1.5 of measured load also＜during 2.5Var, at first, secondary load is connected on S1 and the S2 terminal again terminal S2 and S3 terminal short circuit.
Claims (8)
1. Open Type Electric Current Mutual Inductor, it is characterized in that constituting by two semi-round ring shape housings, be provided with iron core and secondary winding in the described semi-round ring shape housing, described iron core and secondary winding are cast in the corresponding semi-round ring shape housing with epoxide resin vacuum, one end of described two semi-round ring shape housings is hinged, the other end is involutory mutually, form toroidal shell, the leading-out terminal front cover of described housing is the epoxy resin face, described epoxy resin face is provided with securing member, described leading-out terminal is provided with outlet terminal, the outside of described toroidal shell is provided with described two semi-round ring shape housing hoops anchor ear together, the buckle mechanism of described anchor ear is positioned at the involutory end of described two semi-round ring shape housings, be equipped with draw-in groove on the circumference of described two semi-round ring shape hull outside faces, the draw-in groove of two semicircular shells is interconnected to form annular, and described anchor ear embeds in the described draw-in groove.
2. Open Type Electric Current Mutual Inductor as claimed in claim 1 is characterized in that described securing member is divided into not moving part and movable piece.
3. Open Type Electric Current Mutual Inductor as claimed in claim 2 is characterized in that described not moving part is fixed on the epoxy resin face of a described semi-round ring shape housing, and described movable piece is connected with described not moving part with screw.
4. Open Type Electric Current Mutual Inductor as claimed in claim 1 is characterized in that described outlet terminal is three.
5. Open Type Electric Current Mutual Inductor as claimed in claim 1 is characterized in that described draw-in groove is positioned at the middle part of described two semi-round ring shape hull outside faces.
6. Open Type Electric Current Mutual Inductor as claimed in claim 1, the draw-in groove at middle part that it is characterized in that described two semi-round ring shape hull outside faces to fashionable mutual butt joint, forms a complete annular slot at two semi-round ring shape housings.
7. Open Type Electric Current Mutual Inductor as claimed in claim 1 is characterized in that the main part of described anchor ear adopts steel band, and described hasp adopts metal structure.
8. Open Type Electric Current Mutual Inductor as claimed in claim 1 is characterized in that the width of described draw-in groove slightly is wider than the width of described anchor ear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201084371U CN201465789U (en) | 2009-06-04 | 2009-06-04 | Open type current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201084371U CN201465789U (en) | 2009-06-04 | 2009-06-04 | Open type current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201465789U true CN201465789U (en) | 2010-05-12 |
Family
ID=42393137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201084371U Expired - Fee Related CN201465789U (en) | 2009-06-04 | 2009-06-04 | Open type current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201465789U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226976A (en) * | 2011-04-07 | 2011-10-26 | 常熟开关制造有限公司(原常熟开关厂） | Current transformer |
| CN103364685A (en) * | 2013-07-22 | 2013-10-23 | 珠海创能科世摩电气科技有限公司 | Current temperature on-line fault indicator and method for judging fault |
| CN103714960A (en) * | 2014-01-13 | 2014-04-09 | 国家电网公司 | Electricity larceny prevention device |
| CN105355406A (en) * | 2015-11-24 | 2016-02-24 | 广东电网有限责任公司电力科学研究院 | Opening current transformer capable of being installed in powered-on mode |
| CN106024300A (en) * | 2016-06-27 | 2016-10-12 | 国网江苏省电力公司盐城供电公司 | Zero sequence current transformer capable of preventing cable from loosening |
| CN110244102A (en) * | 2019-07-29 | 2019-09-17 | 广东电网有限责任公司 | A kind of leakage current of an arrester on-line monitoring leakage current mutual inductor and on-line monitoring system |
| CN112038076A (en) * | 2020-10-15 | 2020-12-04 | 江苏靖江互感器股份有限公司 | Open-type current transformer |
-
2009
- 2009-06-04 CN CN2009201084371U patent/CN201465789U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226976A (en) * | 2011-04-07 | 2011-10-26 | 常熟开关制造有限公司(原常熟开关厂） | Current transformer |
| CN103364685A (en) * | 2013-07-22 | 2013-10-23 | 珠海创能科世摩电气科技有限公司 | Current temperature on-line fault indicator and method for judging fault |
| CN103364685B (en) * | 2013-07-22 | 2016-06-29 | 珠海创能科世摩电气科技有限公司 | The online fault detector of current temperature and failure judgment method |
| CN103714960A (en) * | 2014-01-13 | 2014-04-09 | 国家电网公司 | Electricity larceny prevention device |
| CN103714960B (en) * | 2014-01-13 | 2016-06-01 | 国家电网公司 | A kind of anti-electricity-theft device |
| CN105355406A (en) * | 2015-11-24 | 2016-02-24 | 广东电网有限责任公司电力科学研究院 | Opening current transformer capable of being installed in powered-on mode |
| CN106024300A (en) * | 2016-06-27 | 2016-10-12 | 国网江苏省电力公司盐城供电公司 | Zero sequence current transformer capable of preventing cable from loosening |
| CN110244102A (en) * | 2019-07-29 | 2019-09-17 | 广东电网有限责任公司 | A kind of leakage current of an arrester on-line monitoring leakage current mutual inductor and on-line monitoring system |
| CN112038076A (en) * | 2020-10-15 | 2020-12-04 | 江苏靖江互感器股份有限公司 | Open-type current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20180604 |