CN201435302Y - Current mutual inductor for voltage output - Google Patents
Current mutual inductor for voltage output Download PDFInfo
- Publication number
- CN201435302Y CN201435302Y CN2009201030954U CN200920103095U CN201435302Y CN 201435302 Y CN201435302 Y CN 201435302Y CN 2009201030954 U CN2009201030954 U CN 2009201030954U CN 200920103095 U CN200920103095 U CN 200920103095U CN 201435302 Y CN201435302 Y CN 201435302Y
- Authority
- CN
- China
- Prior art keywords
- lead
- wire
- primary
- coil
- mutual 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 - Lifetime
Links
Images
Landscapes
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model relates to a current mutual inductor used for a relay protection device in a power system for the direct voltage output. Two or three secondary coils are arranged on the insulation shell of the current mutual inductor, and each secondary coil comprises an iron core and an enameled wire wound around the outer surface of the iron core; a high precision resistor is connected in parallel between secondary lead wires of the secondary coils, and a secondary pinout leads the secondary lead wires out ; and primary lead wires are wound to form a primary coil, one end of each primary lead wire is connected together in parallel to lead a primary lead wire common terminal out, and the primary lead wires and the primary lead wire common terminal are connected with the measured currentcircuit. The utility model directly converts input current signals into voltage signals for output, and output voltage signals have high accuracy; a copper fail shield is added between the primary coil and the secondary coils to avoid the influence and the interference from outside environment; and current mutual inductor has the advantages of convenient installation and utilization, low cost andeasy manufacture.
Description
Technical field
The utility model relates to the current transformer that a kind of power system relay protection device of direct voltage output is used.
Background technology
Existing current transformer generally is made up of primary coil, iron core, secondary coil, and primary coil is connected on the tested current circuit, and by electromagnetic induction, the current signal of secondary coil induction output is measured for instrument and meter and used.And in power system relay protection device, often need to obtain voltage signal; general using method is for increasing by a cover auxiliary circuit again outside existing current transformer; by auxiliary circuit current signal is converted to voltage signal; especially in three-phase electrical power system; the peripheral auxiliary circuits structure is complicated; the cost height, the user oneself that needs who also has adds elementary lead-in wire, makes troubles to use.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of current transformer that can directly be converted to input current signal voltage signal, an instrument transformer can satisfy three-phase line to be used, and is furnished with elementary lead-in wire and shielding, is easy to make, cost is low, and is easy to install.
The utility model adopts following technical scheme:
The utility model is provided with 2 or 3 secondary coils in the insulation crust of current transformer, each secondary coil is formed by iron core with around the enamelled wire of iron core outside, precision resister in parallel between the secondary lead of secondary coil, secondary lead is drawn by secondary output stitch, elementary lead-in wire twines and constitutes primary coil, one end of elementary lead-in wire connects together and draws an elementary lead-in wire common port, and elementary lead-in wire is connected tested current circuit with elementary lead-in wire common port.
The utility model primary coil, Copper Foil shielding, secondary coil, precision resister are arranged in the insulation crust, set as one by the epoxy resin envelope.
The utility model secondary coil outside is added with the Copper Foil shielding that has shielded lead, and shielded lead is drawn by the shielding stitch.
The utility model good effect is as follows:
The utility model directly is converted to voltage signal output to input current signal, output voltage signal accuracy height, be added with the Copper Foil shielding between primary coil and secondary coil, avoid external environment influence and interference, an instrument transformer can satisfy three-phase line to be used, the secondary stitch lead-out mode that is output as, make things convenient for the pcb board welding, and be furnished with elementary lead-in wire, easy to install, cost is low, is easy to make.
Description of drawings
Accompanying drawing 1 is the utility model principle schematic;
Accompanying drawing 2 is the utility model structural representation;
Accompanying drawing 3 is looked outside drawing for the utility model master;
Accompanying drawing 4 is looked outside drawing for the utility model left side.
In the accompanying drawings: 1 elementary lead-in wire, 2 secondary lead, 3 precision resisters, 4 shielded leads, 5 secondary coils, 6 insulation crusts, 7 elementary lead-in wire common ports, 8 current transformers, 9 levels are exported stitch, 10 shielding stitch.
Embodiment
The utility model is built-in 2 or 3 current transformer secondary coils in the insulation shell of current transformer, each current transformer secondary coil is formed by iron core with around the enamelled wire of iron core outside, the lead-in wire of secondary coil is drawn with stitch, precision resister in parallel between lead-in wire; The shielding that the secondary coil outside has Copper Foil to do, shielded lead is drawn with stitch, twines with an elementary lead-in wire to constitute primary coil; Good insulation between primary coil, shielding, secondary coil; One end of elementary lead-in wire connects together and draws a common port.Setting by primary coil, the different turn ratios of secondary coil can realize multiple current ratio, and precision resister value difference can realize the output of multiple voltage value.By epoxy resin primary coil, secondary coil, precision resister one are encapsulated in the insulation crust during production, current ratio and output voltage signal value can not change again, output voltage signal accuracy height, avoid external environment influence and interference, volume is little, and cost is low, is easy to make.
The utility model 2 or 3 current transformer secondary coils are arranged side by side in insulation crust, set as one by the epoxy resin envelope.
The utility model is added with the Copper Foil shielding between primary coil and secondary coil.
As shown in drawings, in an embodiment, current transformer 8 has 3 current transformer secondary coils 5 and forms.Precision resister 3 of 2 parallel connections of the secondary lead of each secondary coil 5, secondary lead 2 is drawn by secondary output stitch 9, for the protective relaying device subsequent conditioning circuit provides voltage signal; Three elementary lead-in wires 1 twine and constitute three primary coils, and an end of three elementary lead-in wires 1 connects together and draws an elementary lead-in wire common port 7.Elementary lead-in wire 1 is connected tested current circuit with elementary lead-in wire common port 7; Three secondary coil 5 outsides are added with the Copper Foil shielding separately, and shielded lead 4 is drawn by shielding stitch 10; Primary coil, shielding, 5 good insulation of secondary coil; Isolate mutually between the different secondary coils 5, when producing, adopt epoxy resin, do not have the friction of colliding with between each coil, realize good insulation performance between each coil primary coil, shielding, secondary coil 5, precision resister 3 one embeddings.Be output as the stitch lead-out mode, the installing hole of reserving on stitch position and the protective relaying device pcb board mates fully, the convenient installation.
Claims (3)
1, a kind of current transformer of output voltage, it is characterized in that in the insulation crust (6) of current transformer (8), being provided with 2 or 3 secondary coils (5), each secondary coil (5) is formed by iron core with around the enamelled wire of iron core outside, a precision resister (3) in parallel between the secondary lead (2) of secondary coil (5), secondary lead (2) is drawn by secondary output stitch (9), elementary lead-in wire (1) twines and constitutes primary coil, one end of elementary lead-in wire (1) connects together and draws an elementary lead-in wire common port (7), and elementary lead-in wire (1) is connected tested current circuit with elementary lead-in wire common port (7).
2, the current transformer of a kind of output voltage according to claim 1 is characterized in that primary coil, Copper Foil shielding, secondary coil (5), precision resister (3) are arranged in the insulation crust (6), sets as one by the epoxy resin envelope.
3, the current transformer of a kind of output voltage according to claim 1 and 2 is characterized in that secondary coil (5) outside is added with the Copper Foil shielding that has shielded lead (4), and shielded lead (4) is drawn by shielding stitch (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201030954U CN201435302Y (en) | 2009-06-03 | 2009-06-03 | Current mutual inductor for voltage output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201030954U CN201435302Y (en) | 2009-06-03 | 2009-06-03 | Current mutual inductor for voltage output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201435302Y true CN201435302Y (en) | 2010-03-31 |
Family
ID=42054117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201030954U Expired - Lifetime CN201435302Y (en) | 2009-06-03 | 2009-06-03 | Current mutual inductor for voltage output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201435302Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881438A (en) * | 2012-09-17 | 2013-01-16 | 熊江咏 | Electronic current transformer matched with low-voltage circuit breaker |
| CN103018529A (en) * | 2012-12-11 | 2013-04-03 | 扬州新概念电气有限公司 | Combined type current voltage sensor |
| CN105575643A (en) * | 2016-02-29 | 2016-05-11 | 济南铂晶电子科技有限公司 | Three-phase current transformer |
| CN111108569A (en) * | 2018-08-28 | 2020-05-05 | 株式会社高本技术 | Independent printed circuit board current transformer device suitable for circuit breaker instantaneous current detection |
-
2009
- 2009-06-03 CN CN2009201030954U patent/CN201435302Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881438A (en) * | 2012-09-17 | 2013-01-16 | 熊江咏 | Electronic current transformer matched with low-voltage circuit breaker |
| CN102881438B (en) * | 2012-09-17 | 2016-04-20 | 熊江咏 | The supporting electronic current mutual inductor of low-voltage circuit breaker |
| CN103018529A (en) * | 2012-12-11 | 2013-04-03 | 扬州新概念电气有限公司 | Combined type current voltage sensor |
| CN103018529B (en) * | 2012-12-11 | 2015-06-03 | 扬州新概念电气有限公司 | Combined type current voltage sensor |
| CN105575643A (en) * | 2016-02-29 | 2016-05-11 | 济南铂晶电子科技有限公司 | Three-phase current transformer |
| CN111108569A (en) * | 2018-08-28 | 2020-05-05 | 株式会社高本技术 | Independent printed circuit board current transformer device suitable for circuit breaker instantaneous current detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203406161U (en) | Hollow coil with closed magnetic circuit and resistance voltage divider combined electronic instrument transformer | |
| CN201435302Y (en) | Current mutual inductor for voltage output | |
| CN202258772U (en) | Epoxy pouring totally-closed support type electronic combined transformer for centrally installed switchgear | |
| CN201302592Y (en) | Electrical energy measuring cabinet | |
| CN204945228U (en) | A kind of alternating current sampling apparatus | |
| CN201435305Y (en) | Current and voltage transformer module | |
| CN201319314Y (en) | Current transformer | |
| CN103617868A (en) | Magnetic circuit component of magnetism modulating voltage sensor | |
| CN201663050U (en) | Electronic combined transformer | |
| CN103592491B (en) | Current isolation mutual inductor | |
| CN113823495B (en) | High-voltage double-wire pack assembly and high-voltage self-current-rising standard current transformer | |
| CN203406160U (en) | Combined instrument transformer provided with closed magnetic circuit type hollow coil | |
| CN205069304U (en) | Supporting high insulating transformer of power switch cabinet device | |
| CN201302455Y (en) | Package structure of eddy current transducer | |
| CN207366678U (en) | A kind of conversion link block of transformer testing | |
| CN201332012Y (en) | Electronic type combined transformer for digital transformer substation | |
| CN202513025U (en) | Extra-high-voltage current transformer with annular shielding box | |
| CN202870144U (en) | Current measuring device for breaker or switch cabinet | |
| CN208444730U (en) | A kind of current transformer applied to large-scale generator | |
| CN203406159U (en) | Hollow coil with closed magnetic circuit and coaxial capacitor combined electronic instrument transformer | |
| CN202307496U (en) | Electronic high-voltage current transformer | |
| CN202453413U (en) | Electronic type combined sensor | |
| CN201191562Y (en) | Multifunction current mutual inductor | |
| CN201332016Y (en) | Electronic type current transformer for digital transformer substation | |
| CN110609192A (en) | Low-voltage primary power system parameter acquisition system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100331 |