CN102360900A - Open-close type current and voltage transformer - Google Patents
Open-close type current and voltage transformer Download PDFInfo
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- CN102360900A CN102360900A CN201110237882XA CN201110237882A CN102360900A CN 102360900 A CN102360900 A CN 102360900A CN 201110237882X A CN201110237882X A CN 201110237882XA CN 201110237882 A CN201110237882 A CN 201110237882A CN 102360900 A CN102360900 A CN 102360900A
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- iron core
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Abstract
The invention discloses an open-close type current and voltage transformer which comprises a current transformer and a voltage sampler, wherein the voltage sampler is mounted on one side of the current transformer through a T-shaped bulge and a T-shaped groove on the side surface of the current transformer, and the relative positions of the current transformer and the voltage sampler can be determined through two fixing pieces and the bulge on the current transformer. As an upper housing and a lower housing of the current transformer comprise mounting holes which can be fastened by using nuts and screw rods, thereby being convenient to enable the upper housing and the lower housing to form a closed combined whole during the use. The whole current and voltage transformer can be combined by adopting the screw rods and the nuts, thereby simultaneously having the function of sampling voltage signals. A groove structure is adopted at the joint of two C-shaped iron cores and matched with a resin housing with orthogonal grooves, the connection is reliable, the good closing of a magnetic circuit is ensured and the requirements on the measurement precision can be met.
Description
Technical field
The present invention relates to a kind of current/voltage checkout equipment of electric power system, particularly a kind of open-close type current voltage transformer.
Background technology
Current transformer and voltage transformer are used for the electric current and the voltage detecting of electric power system, have electrical isolation and voltage current transformation effect, and range of application is very extensive.Chinese patent ZL 200810074348 discloses a kind of straight-through current transformer of conveniently taking voltage, and its method is directly to take voltage signal through the insulating barrier that punctures lead.Chinese patent ZL 200820124089 discloses a kind of open-close type instrument transformer, and it has the open-close type transformer iron core, and its iron core junction is a castellated shape.Chinese patent ZL 200910222101 also discloses a kind of magnetic circuit open-close type current transformer, and the iron core junction of its open-close type instrument transformer is single zigzag structure.Though above-mentioned instrument transformer all can be accomplished the detection of current/voltage, has following problem:
When 1, signal is pressed in the straight-through current transformer power taking, inconvenient during installation.
2, open-close type current transformer is convenient installs, but need set up voltage transformer in addition when taking voltage signal.
3, the contact of the iron core junction of open-close type instrument transformer is unreliable, can not guarantee to connect when mounted the required precision of satisfying measurement.
4, existing open-close type instrument transformer only has half iron core that winding is set, and current precision is measured in influence.
Summary of the invention
Be to solve the problems referred to above that prior art exists, the present invention to design a kind of easy for installation, connect the open-close type current voltage transformer that is easy to make up reliable, that certainty of measurement is high.
To achieve these goals; Technical scheme of the present invention is following: a kind of open-close type current voltage transformer; Comprise a current transformer and a voltage sampling device; Described voltage sampling device is installed in a side of current transformer through the T type groove of the protruding summation current transformer of T shape side, and confirms the relative position between current transformer and the voltage sampling device through the convexity on two stators and the current transformer;
Described current transformer comprises housing, iron core and secondary winding; Described housing is identical and two parts up and down that can folding of two structures; Be upper body and lower case, described iron core is two the C sections cores that structure is identical, i.e. top iron core and bottom iron cores; Be separately installed with top iron core and bottom iron core in upper body and lower case inside; Evenly arrange secondary winding on top iron core and the bottom iron core respectively; The correspondence position of upper body and lower case all has two installing holes; Upper body and lower case are tightened to an integral body through two nut-screws, and the secondary winding of top iron core and bottom iron core externally links together through lead, constitutes complete secondary winding;
The junction of described upper body and lower case is processed with groove, and the junction of described top iron core and bottom iron core is processed with groove; The groove direction mutually orthogonal of described groove direction and iron core;
Described voltage sampling device comprises housing and profile of tooth spine, and described housing is combined by upper shell and lower house that can folding, and upper shell and lower house profile are identical; The housing center have can the insulation-piercing cable insulation the staggered profile of tooth spine of two rows, the profile of tooth spine is connected to the inner voltage transformer and the binding post of outside through the lead of enclosure interior; One side of housing is the square convexity that has circular port; A relative side is a circular protrusions; Upper shell and lower house position through circular protrusions and circular port, have installing hole at circular port and circular protrusions center, and upper shell and lower house are fastening through two nuts and screw rod; Make relative profile of tooth spine relative, form a complete voltage sampling device.
The inner profile of tooth spine of voltage sampling device of the present invention directly is connected to the terminal of housing through inner lead, directly obtain the voltage signal without conversion.
The housing one side center of current transformer of the present invention has groove, and inside grooves has convexity; Have two relative T type grooves in the outside of central recess.
Voltage sampling device of the present invention inside is equipped with voltage transformer, and the end that the housing of described voltage transformer is relative with the profile of tooth spine has the pancake square hole; It is protruding that one side of housing has the T type; The T type convexity of described voltage transformer and the T type groove fit of said current transformer, and the installing and locating sheet is fixed together described voltage transformer and described current transformer in the square installing hole of said voltage transformer one end.
Compared with prior art, the present invention has following beneficial effect:
1, because the upper body and the lower case of current transformer of the present invention have the installing hole that can use nut-screw fastening, upper body and lower case form the closed complete integral body that is combined into during convenient the use.The junction that intersection trench, top iron core and bottom iron core are processed in the junction of upper body and lower case is processed into orthogonal trenches and is helped upper body and lower case when closed, guarantees that the top iron core contact with the bottom iron core reliably well.
2, the present invention adopts bolt and nut can combine complete current-voltage transformer, has power taking simultaneously and presses semiotic function.
3, only need to use screw to carry out fastening in the present invention, can carry out power taking to cable with insulating barrier or plain conductor and press signal.
4, the iron core junction of two the C types of the present invention resin-case that adopts groove structure and have an orthogonal trenches cooperates, and connects reliable.Guarantee that magnetic circuit is closed good, satisfies the certainty of measurement requirement.
5, the external cabling terminal of current transformer of the present invention is designed to make things convenient for the structure of line use, under charged situation, can guarantee construction safety.
6, the present invention proposes the current transformer of the directly power taking pressure signal that a kind of electric power system of convenient combination uses.In the time of particularly need setting up current transformer for existing power equipment; Need not have a power failure; Directly construction and installation; The plough groove type iron circuit method of closing that is adopted effectively improves the accuracy of detection of product, and connection mode can make the no-load voltage ratio of current transformer change into original 1/2nd through different connection modes flexibly.
7, voltage transformer can be set up in voltage power taking device of the present invention inside; Enlarged the scope of application of combined instrument transformer; The voltage sampling device can use as the single-phase voltage sample of signal separately, also can cooperate two other voltage sampling device to be connected into the three-phase voltage sampler and use.
Description of drawings
10 in the total accompanying drawing of the present invention, wherein:
Fig. 1 is the shaft side figure of current-voltage transformer structural representation.
Fig. 2 is the front view of current-voltage transformer structural representation.
Fig. 3 is the A-A cutaway view of Fig. 2.
Fig. 4 is the rearview of Fig. 2.
Fig. 5 is the left view of Fig. 2.
Fig. 6 is the vertical view of Fig. 2.
Fig. 7 is the voltage transformer cut-away drawing.
Cut-away drawing when Fig. 8 is the current transformer series wiring.
Cut-away drawing when Fig. 9 is current transformer and tie.
Figure 10 is the orthogonal trenches shape sketch map of current transformer housing junction.
Among the figure: 1, upper body, 2, lower case, 3, the top iron core, 4, the bottom iron core, 5, secondary winding, 6, nut, 7, screw rod, 8, upper shell, 9, lower house, 10, the positioning and fixing sheet, 11, the profile of tooth spine.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.Shown in Fig. 1-9; A kind of open-close type current voltage transformer; Comprise a current transformer and a voltage sampling device; Described voltage sampling device is installed in a side of current transformer through the T type groove of the protruding summation current transformer of T shape side, and confirms the relative position between current transformer and the voltage sampling device through the convexity on two stators 10 and the current transformer;
Described current transformer comprises housing, iron core and secondary winding 5; Described housing is identical and two parts up and down that can folding of two structures; Be upper body 1 and lower case 2, described iron core is two C sections cores that structure is identical, i.e. top iron core 3 and bottom iron core 4; Be separately installed with top iron core 3 and bottom iron core 4 in upper body 1 and lower case 2 inside; Evenly arrange secondary winding 5 on top iron core 3 and the bottom iron core 4 respectively; The correspondence position of upper body 1 and lower case 2 all has two installing holes; Upper body 1 is tightened to an integral body with lower case 2 through two nuts, 6 screw rods 7, and the secondary winding 5 of top iron core 3 and bottom iron core 4 externally links together through lead, constitutes complete secondary winding 5;
The junction of described upper body 1 and lower case 2 is processed with groove, and the junction of described top iron core 3 and bottom iron core 4 is processed with groove; The groove direction mutually orthogonal of described groove direction and iron core;
Described voltage sampling device comprises housing and profile of tooth spine 11, and described housing is combined with lower house 9 by upper shell 8 that can folding, and upper shell 8 is identical with lower house 9 profiles; The housing center have can the insulation-piercing cable insulation the staggered profile of tooth spine 11 of two rows, profile of tooth spine 11 is connected to the inner voltage transformer and the binding post of outside through the lead of enclosure interior; One side of housing is the square convexity that has circular port; A relative side is a circular protrusions; Upper shell 8 positions through circular protrusions and circular port with lower house 9, has installing hole at circular port and circular protrusions center, and upper shell 8 is fastening through two nuts 6 and screw rod 7 with lower house 9; Make relative profile of tooth spine 11 relative, form a complete voltage sampling device.
The inner profile of tooth spine 11 of described voltage sampling device directly is connected to the terminal of housing through inner lead, directly obtain the voltage signal without conversion.
The housing one side center of described current transformer has groove, and inside grooves has convexity; Have two relative T type grooves in the outside of central recess.
Voltage sampling device of the present invention inside is equipped with voltage transformer, and the end that the housing of described voltage transformer and profile of tooth spine 11 are relative has the pancake square hole; It is protruding that one side of housing has the T type; The T type convexity of described voltage transformer and the T type groove fit of said current transformer, and the installing and locating sheet is fixed together described voltage transformer and described current transformer in the square installing hole of said voltage transformer one end.
Method for using of the present invention is following:
The present invention in use; To measure lead after the upper body 1 of Current Transformer and lower case 2 secure closure and be placed in the interstitial hole, the T type groove of the housing of the upper shell 8 of voltage sampling device and lower house 9 usefulness T types convexity summation current transformer is connected, the voltage sampling device can slide along T type groove; Metal-toothed is aimed at the lead of taking a sample; Use bolt and nut 6 fastening, make metal-toothed puncture wire insulation, the metallic conductor of reliable contact wire.The installing and locating sheet is fixed current transformer and voltage transformer relative position.
There are six terminals the both sides of the housing of current transformer, two terminals of a side, and 4 terminals of an other side, both sides terminal symmetry spacing evenly distributes, and distance is the half the of terminal pitch apart from the edge.One end of inner winding is connected to two terminals and a terminal of an other side of a side of housing through lead, an other end of winding is connected to other three in four terminals through lead.
The upper body 1 of current transformer is formed complete current transformer with lower case 2 closed backs, and terminal use short-circuit piece two windings up and down connects into series connection and parallel form.Inboard short-circuit piece in the terminal breaks off, and outside short-circuit piece breaks off the load of side serial connection, two windings in series; Inboard short-circuit piece breaks off, and outside short-circuit piece keeps connecting, and connects load respectively, two winding parallel connections.
Voltage sampling device inside can be provided with voltage transformer, and the direct extraction voltage signal of voltage transformer also can be set, and concrete wiring is following:
When 1, voltage transformer being set; Primary side one end of voltage transformer is connected to profile of tooth spine 11 and a terminal A; An other end of first side winding is connected to another one terminal X; One end of the secondary side winding of said voltage transformer is connected to a terminal a, and an other end is connected to terminal x, and the A of first side winding and secondary side winding and a end are end of the same name.During the single-phase use of voltage sampling device, need be with X terminal connecting to neutral line, the A terminal line of starting to exchange fire, a terminal and x terminal are voltage signal output end, connect load; When three-phase uses, cooperate the voltage sampling device of other two phases can be as required to be combined into star-like angle type etc. and connect method through the different modes of connection.
When 2, inside was not provided with voltage transformer, the profile of tooth spine 11 of voltage sampling device was wired to the A terminal, and other terminal is left a blank.The A terminal directly connects load.
Claims (4)
1. open-close type current voltage transformer; It is characterized in that: comprise a current transformer and a voltage sampling device; Described voltage sampling device is installed in a side of current transformer through the T type groove of the protruding summation current transformer of T shape side, and confirms the relative position between current transformer and the voltage sampling device through the convexity on two stators (10) and the current transformer;
Described current transformer comprises housing, iron core and secondary winding (5); Described housing is identical and two parts up and down that can folding of two structures; Be upper body (1) and lower case (2); Described iron core is two C sections cores that structure is identical, i.e. top iron core (3) and bottom iron core (4); Be separately installed with top iron core (3) and bottom iron core (4) in upper body (1) and lower case (2) inside; Top iron core (3) and bottom iron core (4) are gone up and are evenly arranged secondary winding (5) respectively; The correspondence position of upper body (1) and lower case (2) all has two installing holes; Upper body (1) and lower case (2) are tightened to an integral body through two nuts (6) screw rods (7); The secondary winding (5) of top iron core (3) and bottom iron core (4) externally links together through lead, constitutes complete secondary winding (5);
The junction of described upper body (1) and lower case (2) is processed with groove, and the junction of described top iron core (3) and bottom iron core (4) is processed with groove; The groove direction mutually orthogonal of described groove direction and iron core;
Described voltage sampling device comprises housing and profile of tooth spine (11), and described housing is combined by upper shell (8) and lower house (9) that can folding, and upper shell (8) and lower house (9) profile are identical; The housing center have can the insulation-piercing cable insulation two row's staggered profile of tooth spines (11), profile of tooth spine (11) is connected to the inner voltage transformer and the binding post of outside through the lead of enclosure interior; One side of housing is the square convexity that has circular port; A relative side is a circular protrusions; Upper shell (8) and lower house (9) position through circular protrusions and circular port, have installing hole at circular port and circular protrusions center, and upper shell (8) and lower house (9) are fastening through two nuts (6) and screw rod (7); Make relative profile of tooth spine (11) relative, form a complete voltage sampling device.
2. a kind of open-close type current voltage transformer according to claim 1 is characterized in that: the inner profile of tooth spine (11) of described voltage sampling device directly is connected to the terminal of housing through inner lead, directly obtain the voltage signal without conversion.
3. a kind of open-close type current voltage transformer according to claim 1 is characterized in that: the housing one side center of described current transformer has groove, and inside grooves has convexity; Have two relative T type grooves in the outside of central recess.
4. a kind of open-close type current voltage transformer according to claim 1 is characterized in that: described voltage sampling device inside is equipped with voltage transformer, and the end that the housing of described voltage transformer is relative with profile of tooth spine (11) has the pancake square hole; It is protruding that one side of housing has the T type; The T type convexity of described voltage transformer and the T type groove fit of said current transformer, and the installing and locating sheet is fixed together described voltage transformer and described current transformer in the square installing hole of said voltage transformer one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110237882XA CN102360900B (en) | 2011-08-18 | 2011-08-18 | Open-close type current and voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110237882XA CN102360900B (en) | 2011-08-18 | 2011-08-18 | Open-close type current and voltage transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102360900A true CN102360900A (en) | 2012-02-22 |
| CN102360900B CN102360900B (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110237882XA Expired - Fee Related CN102360900B (en) | 2011-08-18 | 2011-08-18 | Open-close type current and voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102360900B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259396A (en) * | 2015-11-03 | 2016-01-20 | 三峡大学 | Electronic current transformer which is installable and dismountable in electrified manner |
| 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 |
| CN105572440A (en) * | 2015-10-20 | 2016-05-11 | 浙江华采科技有限公司 | Electric energy metering device capable of being installed on cable |
| CN108828287A (en) * | 2018-04-08 | 2018-11-16 | 江阴市星火电子科技有限公司 | It is a kind of for measure traverse line electric current, voltage, temperature open-close type mutual inductor |
| CN109326491A (en) * | 2018-11-21 | 2019-02-12 | 首瑞（天津）电气设备有限公司 | Breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01133312A (en) * | 1987-11-18 | 1989-05-25 | Mitsubishi Electric Corp | Combined voltage current transformer |
| CN1415969A (en) * | 2001-10-30 | 2003-05-07 | 韩电Kdn株式会社 | Detector for measuring voltage/current of distribution low voltage line |
| CN201758074U (en) * | 2010-08-12 | 2011-03-09 | 浙江天际互感器有限公司 | Indoor one-phase combined transformer with function of fuse protection |
-
2011
- 2011-08-18 CN CN201110237882XA patent/CN102360900B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01133312A (en) * | 1987-11-18 | 1989-05-25 | Mitsubishi Electric Corp | Combined voltage current transformer |
| CN1415969A (en) * | 2001-10-30 | 2003-05-07 | 韩电Kdn株式会社 | Detector for measuring voltage/current of distribution low voltage line |
| CN201758074U (en) * | 2010-08-12 | 2011-03-09 | 浙江天际互感器有限公司 | Indoor one-phase combined transformer with function of fuse protection |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572440A (en) * | 2015-10-20 | 2016-05-11 | 浙江华采科技有限公司 | Electric energy metering device capable of being installed on cable |
| CN105259396A (en) * | 2015-11-03 | 2016-01-20 | 三峡大学 | Electronic current transformer which is installable and dismountable in electrified manner |
| CN105259396B (en) * | 2015-11-03 | 2019-04-02 | 三峡大学 | A kind of electronic current mutual inductor charging installation and removal |
| 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 |
| CN108828287A (en) * | 2018-04-08 | 2018-11-16 | 江阴市星火电子科技有限公司 | It is a kind of for measure traverse line electric current, voltage, temperature open-close type mutual inductor |
| CN109326491A (en) * | 2018-11-21 | 2019-02-12 | 首瑞（天津）电气设备有限公司 | Breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102360900B (en) | 2012-11-07 |
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