CN206960527U - A kind of small-sized test transformer - Google Patents
A kind of small-sized test transformer Download PDFInfo
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- CN206960527U CN206960527U CN201720723610.3U CN201720723610U CN206960527U CN 206960527 U CN206960527 U CN 206960527U CN 201720723610 U CN201720723610 U CN 201720723610U CN 206960527 U CN206960527 U CN 206960527U
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Abstract
The purpose of this utility model is solve the problems of prior art, finds a kind of small-sized test transformer, is adapted to use in transformer station's operation field, reduces influence of the transformer station magnetic field to its measuring accuracy.In order to realize purpose, a kind of small-sized test transformer of the utility model, including three cans for being provided with earth terminal, an o type magnetic cores are packaged with each can, armature winding and secondary windings are wound with o type magnetic cores, can is provided with pin bores, two pins of armature winding and two pins of secondary windings by pin bores through outside can, and can cooperatively forms full-closed structure with fixed corresponding pin.Advantageous effects：Because each o types magnetic core is packaged in can, can is provided with earth terminal, and the can after ground connection serves the effect of the interference of the interference of electromagnetic field and shielding another two magnetic core to it in shielding environment, substantially increases the anti-function of shielding of test transformer.
Description
Technical field
It the utility model is related to power domain, and in particular to a kind of small-sized test transformer.
Background technology
Three-phase electricity refers to three live wires, this three live wires spaced 120 degree of electric degree angles in phase.Namely any two
Voltage between bar electric wire is all equal, and is connected on this three phase mains and can export the transformer of other three-phase voltage just
It is three-phase transformer.Such as our common cell life lighting transformers, input be the kilovoltage of three-phase 10 and what is exported is
380 volts of voltages of three-phase, and be all 220 volts over the ground per phase voltage.
Phase line is commonly called as live wire, and three-phase is exactly three live wires, but they have differed 120 ° on positive Xuan Jiao, city's piezoelectric transformer
For the A of level with respect to B phases and C phases, voltage when relative two-by-two is all 380V, single-phase to refer to the load connection of any phase line over the ground
It is known as single-phase, the single-phase normal voltage of civil power is 220V.
Three-phase transformer be 3 identical capacity single-phase transformers combination it have three iron cores, each iron core around
2 coils of same phase, one is high-tension coil, and another is that low-voltage coil three-phase electricities are to produce that amplitude is equal, frequency phase
Generator Deng, 120 ° of potentials of phase mutual deviation is referred to as threephase generator；Using threephase generator as power supply, referred to as three phase mains；
The circuit powered with three phase mains, referred to as three-phase circuit.U, V, W are referred to as three-phase, and voltage between phase and phase is line voltage, voltage
For 380V.Mutually it is referred to as phase voltage between center line, voltage is 220V.
In the transformer station of various voltage class, there are many voltage relays of species, air switch with no-voltage trip etc.,
These components performance detection relevant with voltage needs to use adjustable transformer, but because transformer station's electromagnetism intensity is high, causes
Interference, and then measure and forbidden, the portable transformer for being adapted to use in transformer station's operation field is had no at present, therefore needs design one
Kind is adapted to the portable transformer used in transformer station's operation field.
Utility model content
The purpose of this utility model is solve the problems of prior art, finds one kind and is adapted in transformer station's operation
The small-sized test transformer of onsite application, reduce influence of the transformer station magnetic field to its measuring accuracy.
In order to realize the purpose, a kind of small-sized test transformer of the utility model, including three gold for being provided with earth terminal
Belong to box, be packaged with an o type magnetic cores in each can, armature winding and secondary windings, the metal are wound with o type magnetic cores
Box is provided with pin bores, two pins of the armature winding and two pins of secondary windings by pin bores through can
Outside, the can cooperatively form full-closed structure with fixed corresponding pin.
Preferably, three cans are arranged on same for shielding in the housing of electromagnetic field.
Preferably, the can is the cylindrical structural corresponding with o type magnetic cores.
Preferably, each can bottom the week side of boss etc. is provided with 4 connection sheets, and the distance of adjacent tabs is identical,
Connection sheet is provided with the first screw, and housing bottom is provided with second screw corresponding with the first screw.
Preferably, the housing is flat cuboid.
Preferably, the housing is provided with some p-wire socket apertures, p-wire socket aperture by shielding line with it is primary around
The pin of group and the pin of secondary windings connect one to one.
Preferably, in same o types magnetic core, the pin of armature winding and the pin of secondary windings are anti-to can side respectively
To extraction.
Preferably, the o types magnetic core is ultracrystalline magnetic core.
Preferably, the small-sized test transformer connection group is YNyn0.
Following advantageous effects can be obtained by implementing the utility model：Because each o types magnetic core is packaged in gold
Belong in box, can is provided with earth terminal, and the can after ground connection serves the interference of electromagnetic field in shielding environment and shields another two
The effect of interference of the individual magnetic core to it, the anti-function of shielding of test transformer is substantially increased, reduces electric substation's high-intensity magnetic field pair
The influence of test transformer precision, pass through the selection of core shapes and the setting of complexed metal box so that small-sized test transformer
Have good measuring accuracy and anti-electromagnetic field ability.
Brief description of the drawings
Fig. 1 is rearview of the present utility model；
Fig. 2 is the sectional view of B-B direction in Fig. 1；
Fig. 3 be Fig. 1 in A-A to sectional view；
Embodiment
For the ease of the understanding of those skilled in the art, the utility model is made with reference to specific embodiment further
Explanation：
As shown in FIG. 1 to 3, a kind of small-sized test transformer of the utility model, including three metals for being provided with earth terminal
Box 1, each close in can 1 and be packaged with an o types magnetic core 2, armature winding 3 and secondary windings 4 are wound with o types magnetic core 2, gold
Category box 1 is provided with pin bores (not shown), and two pins of armature winding 3 and two pins of secondary windings 4 are by drawing
Through outside can 1, can 1 cooperatively forms full-closed structure with fixed corresponding pin in pin hole.
During test, the pin of primary winding 3 is connected with relay-protection tester, the pin connection of secondary windings 4
Test object.And the one of test object secondary auxiliary normal opened contact is connected to relay-protection tester, and when test object acts, cut-out
Voltage, obtain reading.Because each o types magnetic core 2 is packaged in can 1, and can 1 serves the electricity in shielding environment
Magnetic interference and shielding another two 2 interference to it of magnetic core, substantially increase the anti-function of shielding of tester, reduce electric substation
Influence of the high-intensity magnetic field to test transformer precision.
Tested in the prior art using bulky high-power transformer, individually encapsulation can overheat large-scale magnetic core 2, Yi Rong
Change, therefore can not individually encapsulate.And miniaturization design of the present invention, individually encapsulation will not also overheat magnetic core 2, therefore can individually seal
Dress, the shape of magnetic core 2 and the selection of material are coordinated by the independent encapsulation of magnetic core 2, greatly reduce ambient electromagnetic field to this hair
The influence of bright small-sized test transformer so that the present invention can reduce electromagnetic induction in forceful electric power environment at the scene, keep precision.
Such as Fig. 1, three cans 1 are arranged on same to shield in the housing 7 of electromagnetic field, and housing 7 is provided with p-wire
Socket aperture 5, the lead of lead and secondary windings 4 that p-wire socket aperture 5 passes through shielding line 6 and armature winding 3, which corresponds, to be connected
Connect, generally, two leads of an armature winding 3 connect a test line jack, and two of a secondary windings 4 draw
Line connects a p-wire socket aperture.It the advantage is that, small-sized test transformer can further be improved by the setting of housing 7
Electromagnetic-field-shielded ability, it is easily portable while after can 1 is fixed in housing 7；The setting of p-wire socket aperture,
It is easy to the connection of the pin of primary winding 3 and protection tester, also allows for and the pin of secondary windings 4 and test pair
The connection of elephant；Connected between p-wire socket aperture 5 and lead by shielding line 6, such structure can further improve raising
The electromagnetic-field-shielded ability of small-sized test transformer.
As shown in figure 1, in order to further reduce the size of small-sized test transformer, can 1 is relative with o types magnetic core 2
The cylindrical structural answered, relative to the other shapes such as square, the advantages of can 1 is cylindrical structural, is, under the same terms,
Can 1 take space it is relatively smaller, and then can smaller test transformer size；Simultaneously for the ease of can 1 with
Housing 7 connects, and the bottom the week side of boss of can 1 is provided with 4 connection sheets 11, and the distance of adjacent tabs is identical, and connection sheet level is set
Put, connection sheet 11 is provided with the first screw 12, and the bottom of housing 7 is provided with second screw corresponding with the first screw 12 (in figure not
Show)；For the ease of installing and improving the reasonability of the location arrangements of can 1, the second 4 one group of screw, three groups are set altogether, phase
The distance between adjacent two group of second screw is identical, making and the reasonable space for utilizing housing 7 for the ease of housing 7, Ke Yiwei
Flat cuboid.
In the prior art, the pin of first winding and the same place of the pin of secondary winding come out, and are approached between terminal, do
Disturb greatly, in order to reduce interference, by same o types magnetic core 2, the pin of armature winding 3 and the pin of secondary windings 4 are respectively to metal
The side of box 1 is reversely drawn, that is, differs 180 degree, and then reduces interference, improves the measuring accuracy of small-sized test transformer.As excellent
Embodiment is selected, small-sized test transformer connection group is YNyn0, o types magnetic core 2 internal diameter 30mm, external diameter 70mm, height 25mm.
Specific embodiment of the utility model is these are only, but the technical characteristics of the utility model is not limited thereto, and is appointed
What those skilled in the art in field of the present utility model, all cover of the present utility model special by the change or modification made
Among sharp scope.
Claims (9)
1. a kind of small-sized test transformer, it is characterised in that equal in each can including three cans for being provided with earth terminal
An o type magnetic cores are packaged with, armature winding and secondary windings are wound with o type magnetic cores, the can is provided with pin bores, described
Two pins of armature winding and two pins of secondary windings by pin bores through outside can, the can with it is fixed
Corresponding pin cooperatively forms full-closed structure.
2. a kind of small-sized test transformer as claimed in claim 1, it is characterised in that three cans are arranged on same
In housing for shielding electromagnetic field.
3. a kind of small-sized test transformer as claimed in claim 2, it is characterised in that the can is and o type magnetic core phases
Corresponding cylindrical structural.
4. a kind of small-sized test transformer as claimed in claim 3, it is characterised in that each can bottom the week side of boss is set
4 connection sheets are equipped with, the distance of adjacent tabs is identical, and connection sheet is provided with the first screw, and housing bottom is provided with and the first spiral shell
The second corresponding screw of hole.
A kind of 5. small-sized test transformer as claimed in claim 2, it is characterised in that：The housing is flat cuboid.
A kind of 6. small-sized test transformer as claimed in claim 2, it is characterised in that：The housing is provided with some p-wires
Socket aperture, the pin of pin and secondary windings that p-wire socket aperture passes through shielding line and armature winding connect one to one.
A kind of 7. small-sized test transformer as claimed in claim 1, it is characterised in that in same o types magnetic core, armature winding
The pin of pin and secondary windings is reversely drawn to can side respectively.
A kind of 8. small-sized test transformer as described in any one in claim 1~7, it is characterised in that：The o types magnetic core
For ultracrystalline magnetic core.
A kind of 9. small-sized test transformer as claimed in claim 1, it is characterised in that：The small-sized test transformer connection group
Wei not YNyn0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720723610.3U CN206960527U (en) | 2017-06-21 | 2017-06-21 | A kind of small-sized test transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720723610.3U CN206960527U (en) | 2017-06-21 | 2017-06-21 | A kind of small-sized test transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206960527U true CN206960527U (en) | 2018-02-02 |
Family
ID=61385815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720723610.3U Active CN206960527U (en) | 2017-06-21 | 2017-06-21 | A kind of small-sized test transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206960527U (en) |
-
2017
- 2017-06-21 CN CN201720723610.3U patent/CN206960527U/en active Active
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