CN204407147U - A kind of grounding transformer - Google Patents
A kind of grounding transformer Download PDFInfo
- Publication number
- CN204407147U CN204407147U CN201520124821.6U CN201520124821U CN204407147U CN 204407147 U CN204407147 U CN 204407147U CN 201520124821 U CN201520124821 U CN 201520124821U CN 204407147 U CN204407147 U CN 204407147U
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Abstract
The utility model discloses a kind of grounding transformer, comprise iron core, winding, positioning base, iron core positioning component and coil location assembly, described iron core positioning component is made up of jointly iron core locating support, flute profile upper clamping piece, flute profile lower clamping piece; Described coil location assembly is made up of jointly coil location support, upper cushion block, lower cushion block; Described iron core locating support is made up of jointly iron core column flange, iron core column and iron core framework; Iron core adopts three-phase three-column heart type structure, and described winding is divided into again a winding and secondary winding.The utility model can overcome the deficiency of coil force structure, and by coil and structure of locating respectively unshakable in one's determination, restriction iron coring vibration, directly to coil transmission, is avoided producing additional noise, enhanced product performance, have a good application prospect; A winding and described secondary winding mutually insulated, can provide fault current information to automatic safety device, be isolated in time to make faulty component simultaneously.
Description
Technical field
The utility model relates to one in a big way, specifically a kind of grounding transformer.
Background technology
In the three-phase electrical power system of neutral point insulation, because isolated neutral, circuit and equipment are easy to because charge inducing suffers damage; And when there is single phase ground fault in such systems, can indirect arc be produced, if do not have suitable device to be extinguished rapidly by this electric arc, then can cause the intense oscillations of electromagnetic energy, healthy phases and fault phase produce serious temporary overvoltage.
And traditional grounding transformer, take silicon steel sheet as magnetic conductive iron, no-load loss is high.Iron core is suspended on coil and avoids with iron core for main load-bearing structural member by Amorphous Alloy Core Transformer, but the structure that this coil is stressed, during operation, iron coring vibration is directly delivered to coil, produces additional noise.Take non-crystaline amorphous metal as all kinds of transformers that magnetic conductive iron is made, because make use of the low advantage of non-crystaline amorphous metal loss, there is obvious energy-saving effect, but non-crystaline amorphous metal is to mechano-sensitive, in structural design, for avoiding amorphous alloy core stressed as far as possible, not with iron core for main load-bearing structural member.
Utility model content
The purpose of this utility model is to provide a kind of grounding transformer, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of grounding transformer, comprise iron core, winding, positioning base, iron core positioning component and coil location assembly, described winding is high pressure interior loop and each one of the high pressure exterior loop of arranged concentric, and described iron core positioning component is made up of jointly iron core locating support, flute profile upper clamping piece, flute profile lower clamping piece, described iron core, iron core positioning component, positioning base is assembled into as a whole, utilize binding strap that iron on iron core is gripped part, flute profile upper clamping piece and iron core framework are fixed into as a whole, described iron core framework is provided with positioning screw, positioning screw is connected with flute profile upper clamping piece, described iron core framework is again by iron core column, iron core column flange and positioning base are secured together, described flute profile lower clamping piece is also secured together with position base, described iron core forms the magnetic circuit needed for electromagnetic induction, folder bears gravity when clamping iron core and hang, positioning base bears overall gravity and is fixedly connected with ground simultaneously, described coil location assembly is made up of jointly coil location support, upper cushion block, lower cushion block, described iron core locating support is made up of jointly iron core column flange, iron core column and iron core framework, described coil location support is made up of jointly coil column flange, coil column and magazine, described winding and coil location assembly, positioning base are assembled into as a whole, described positioning base bears winding by cushion block supporting seat, lower cushion block, compress winding after the described upper cushion block in winding upper end is connected with magazine by nail pressing, described magazine is fixed together by coil column flange, coil column and positioning base again, described iron core adopts three-phase three-column heart type structure, described winding is divided into again a winding and secondary winding, the primary side of a described winding is provided with earthy neutral point, and described secondary winding and a winding are enclosed within iron core with one heart, a described winding and described secondary winding mutually insulated.
As further program of the utility model: described flute profile upper clamping piece and flute profile lower clamping piece two ends are designed to arc and are close to its outer contour with iron core corner.
As the utility model further scheme: described neutral-point solid ground.
As the utility model further scheme: described neutral point electrical connection arc suppression coil, described grounding through arc.
As the utility model further scheme: described neutral point electric connection resistance device, described resistance-grounded system.
As the utility model further scheme: described iron core locating support, comprise four root posts, column lower end is connected with positioning base by flange, column distributes along iron core both sides, column upper end is provided with sphere of movements for the elephants shape framework and forms an entirety, the crossbeam of this framework is provided with positioning screw, and the screw rod other end is connected on flute profile upper clamping piece.
As the utility model further scheme: described coil location support, comprise four root posts, column lower end is connected with positioning base by flange, and column distributes along iron core both sides, two root post upper ends of every side are provided with " day " glyph framework, and framework is by upper cushion block coil pressing.
Compared with prior art, the beneficial effects of the utility model are: the utility model can overcome the deficiency of coil force structure, by coil and structure of locating respectively unshakable in one's determination, restriction iron coring vibration is directly to coil transmission, avoid producing additional noise, enhance product performance, have a good application prospect; A winding and described secondary winding mutually insulated simultaneously; on the one hand, because secondary winding has continuous print rated capacity, can be used as the accessory power supply of transformer station; on the other hand; artificial neutral point is formed at primary side, when there is ground connection for primary side, compensation of ground capacitance current; eliminate earth point electric arc; effectively can avoid the damage of circuit and equipment etc., fault current information can also be provided to automatic safety device, be isolated in time to make faulty component.
Accompanying drawing explanation
Fig. 1 is the assembling schematic diagram of grounding transformer;
Fig. 2 is iron core assembly schematic diagram in grounding transformer;
Fig. 3 is the structural representation of iron core in grounding transformer;
Fig. 4 be in grounding transformer iron core along A-A direction view;
Fig. 5 is grounding transformer coil assembling schematic diagram;
Fig. 6 is the coil sketch of grounding transformer first side winding;
Fig. 7 is the ZN winding diagram of grounding transformer first side winding;
Fig. 8 is the coiling outline drawing of grounding transformer secondary side winding;
Fig. 9 is the YN winding diagram of grounding transformer secondary side winding;
In figure: clamping frame, 9-locating support, the upper cushion block of 10-, 11-lower cushion block, 12-iron core column flange, 13-iron core column, 14-iron core framework, 15-pitch of the laps column flange, 16-coil column, 17-magazine, 18-positioning screw, 19-binding strap, 20-nail pressing, 21-cushion block supporting seat under clamping frame, 8-grooved on 1-iron core, 2-winding, 3-positioning base, 4-iron core positioning component, 5-coil location assembly, 6-iron core locating support, 7-grooved.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 1-9, a kind of grounding transformer, comprise iron core 1, winding 2, positioning base 3, iron core positioning component 4 and coil location assembly 5, described winding 2 is high pressure interior loop and each one of the high pressure exterior loop of arranged concentric, and described iron core positioning component 4 is made up of jointly iron core locating support 6, flute profile upper clamping piece 7, flute profile lower clamping piece 8; Described coil location assembly 5 is made up of jointly coil location support 9, upper cushion block 10, lower cushion block 11; Described iron core locating support 6 is made up of jointly iron core column flange 12, iron core column 13 and iron core framework 14; Described coil location support 9 is made up of jointly coil column flange 15, coil column 16 and magazine 17.
Described iron core 1 adopts three-phase three-column heart type structure, described winding 2 is divided into again a winding and secondary winding, the primary side of a described winding is provided with earthy neutral point, neutral point can by multiple method ground connection, comprise direct ground connection, by grounding through arc with by resistance-grounded system, be described by grounding through arc for neutral point in the present embodiment; Described grounding transformer also comprises the secondary winding be enclosed within one heart with a described winding on iron core, a described winding and described secondary winding mutually insulated.
Refer to Fig. 2, iron core 1, iron core positioning component 4, positioning base 3 is assembled into as a whole, wherein flute profile upper clamping piece 7 and flute profile lower clamping piece 8 two ends are designed to arc and are close to its outer contour with iron core 1 corner, utilize binding strap 19 that iron on iron core 1 is gripped part simultaneously, flute profile upper clamping piece 7 and iron core framework 14 are fixed into as a whole, iron core framework 14 is provided with positioning screw 18, positioning screw 18 is connected with flute profile upper clamping piece 7, and iron core framework 14 is by iron core column 13, iron core column flange 12 and positioning base 3 are secured together, flute profile lower clamping piece 8 is also secured together with position base 3, finally realize iron core 1 to fix with the location of positioning base 3.Iron core 1 forms the magnetic circuit needed for electromagnetic induction, and folder bears gravity when clamping iron core and hang, and positioning base 3 bears overall gravity and is fixedly connected with ground simultaneously; A winding and secondary winding are circuit parts of the present utility model, carry out voltage transformation, energy transferring according to the law of electromagnetic induction, and can provide artificial ground point when primary side ground connection due to the Z-shaped wiring of a winding.
Fig. 3 and Fig. 4 is plane graph and the superposition schematic diagram of iron core of the present utility model, and what iron core adopted is three-phase three-column heart type structure, easily manufactured with the solenoid coil of this structure matching, good stability during short circuit; Stack technique adopts 45 ° of full bias seams, stem and a part for iron yoke alternately overlap together with, seam is alternately hidden, and is the unique forms of modern stack iron core, so joint form of the present utility model improves the electromagnetic performance of iron core from magnetic structure; Core material is selected low-loss, high magnetic conduction, is had the cold-reduced silicon sheet of orientation, and object being also electromagnetic performance in order to improve iron core, reducing magnetic hysteresis and eddy current loss, thus reaches final purpose that is energy-saving and cost-reducing and stability of enhancing product performance.The clamping of iron core has various ways, and stem clamping is taked first to carry out several layers of colligation with half-dried glass at a certain distance without latitude adhesive tape, then hot setting makes adhesive tape tighten up, in addition between low-voltage coil and stem again with wooden fagging wedging iron core; The clamping of iron yoke be first use, respective upper and lower iron yoke clamps at two ends by lower clamping piece, and then by upper clamping piece and lower clamping piece with drawing tie-rod.Whole iron core is supported by base, and base is equipped with trundle, can move around and rotate in 180 °, greatly facilitating in-site installation.
Refer to Fig. 5, winding 2 and coil location assembly 5, positioning base 3 are assembled into as a whole, positioning base 3 bears winding 2 by cushion block supporting seat 21, lower cushion block 11, and the upper cushion block 10 in winding 2 upper end compresses winding 2 after being connected with magazine 17 by nail pressing 20, magazine 17 is fixed together with positioning base 3 by coil column flange 15, coil column 16 again simultaneously, finally achieves winding 2 same fixed with the location of positioning base 3.
Fig. 6 and Fig. 7 is the coil sketch of a winding of the present utility model and the winding diagram of first side winding.A winding and secondary winding are enclosed within iron core column 13 with one heart, and keep enough insulation distances with secondary winding.Winding 2 structure adopts the zonal cooling formula in cake formula, and coil sketch shows a kind of typical coil number of turn and arranges, each coil has two sections, in air flue, outer layering is placed with air flue, skin has tap section, for carrying out Voltage Cortrol, can arrange three taps or five taps according to amount of capacity; In order to the number of turn of reinforced insulation end post cake is general all few than the number of turn at middle part, whole coil is as far as possible symmetrical in the axial direction, magnetic field is evenly distributed vertically, effectively can reduces supplementary load loss like this, and axial electric power, noise and impedance also can be avoided to become large.The material selection dual-fiberglass wrapped flat copper wire of coil, no matter because copper all accounts for clear superiority than aluminium in conductivity, mechanical strength, chemical characteristic and performance of technical process etc.High pressure winding external insulation and discontented circle line segment in coiling all use glass fiber strap to fill, under vacuum conditions with the poured with epoxy resin entering day after complete, firm entirety is formed after solidification, mechanical strength is high, partial discharge quantity is little, reliability is high, interior outside resin insulating barrier is thin, perfect heat-dissipating, and winding is nonhygroscopic, even if intermittent operation also need not dehumidify.Three coil composition three-phases, every coil has two sections, only does station local coordinate frame totally and use when six sections of coils can realize normally running by the wiring of ZN shape; There is provided artificial neutral point to be connected with arc suppression coil during system single-phase earthing, be grounded and protect and fault current information is provided.
Fig. 8 and Fig. 9 is the coiling outline drawing of secondary winding of the present utility model and the winding diagram of secondary side winding.Secondary winding is enclosed within iron core column 13, keeps enough insulation distances with iron core 1; Winding 2 structure adopts the drum type brake in laminar, and coiling outline drawing shows a kind of typical cylindrical coil structure, and in order in the same side outlet, general row is two-layer, and inside and outside layer and layer insulation all use DMD paper to be wound around, and use epoxy resin end-blocking again around complete Post RDBMS.Due to one time, Capacity Ratio secondary capacity is large, so the effective depth of secondary winding is less than the height of a winding, also make use of this imbalance just, and ground connection change can carry out impedance adjustment.The copper conductor sectional area basis for selecting secondary capacity of secondary winding, because secondary winding only has normal operating condition, single phase ground fault occurs not to be affected it.Three-phase transformer to be formed equally and also need three secondary coils, because mostly secondary voltage is 400V, so connect the general employing YN mode of connection.Low-voltage lead will draw to overlap with user's copper bar by copper bar in addition.
It is fixing that the utility model makes iron core 1, winding 2 locate with positioning base 3 respectively, limits iron core 1 and vibrate and transmit directly to winding 2, avoid the generation of additional noise.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned execution mode, in the ken that one skilled in the relevant art possesses, can also makes a variety of changes under the prerequisite not departing from this patent aim.
Claims (7)
1. a grounding transformer, comprise iron core, winding, positioning base, iron core positioning component and coil location assembly, it is characterized in that, described winding is high pressure interior loop and each one of the high pressure exterior loop of arranged concentric, and described iron core positioning component is made up of jointly iron core locating support, flute profile upper clamping piece, flute profile lower clamping piece, described iron core, iron core positioning component, positioning base is assembled into as a whole, utilize binding strap that iron on iron core is gripped part, flute profile upper clamping piece and iron core framework are fixed into as a whole, described iron core framework is provided with positioning screw, positioning screw is connected with flute profile upper clamping piece, described iron core framework is again by iron core column, iron core column flange and positioning base are secured together, described flute profile lower clamping piece is also secured together with position base, described iron core forms the magnetic circuit needed for electromagnetic induction, folder bears gravity when clamping iron core and hang, positioning base bears overall gravity and is fixedly connected with ground simultaneously, described coil location assembly is made up of jointly coil location support, upper cushion block, lower cushion block, described iron core locating support is made up of jointly iron core column flange, iron core column and iron core framework, described coil location support is made up of jointly coil column flange, coil column and magazine, described winding and coil location assembly, positioning base are assembled into as a whole, described positioning base bears winding by cushion block supporting seat, lower cushion block, compress winding after the described upper cushion block in winding upper end is connected with magazine by nail pressing, described magazine is fixed together by coil column flange, coil column and positioning base again, described iron core adopts three-phase three-column heart type structure, described winding is divided into again a winding and secondary winding, the primary side of a described winding is provided with earthy neutral point, and described secondary winding and a winding are enclosed within iron core with one heart, a described winding and described secondary winding mutually insulated.
2. grounding transformer according to claim 1, is characterized in that, described flute profile upper clamping piece and flute profile lower clamping piece two ends are designed to arc and are close to its outer contour with iron core corner.
3. grounding transformer according to claim 1 and 2, is characterized in that, described neutral-point solid ground.
4. grounding transformer according to claim 3, is characterized in that, described neutral point electrical connection arc suppression coil, described grounding through arc.
5. the grounding transformer according to claim 1 or 2 or 4, is characterized in that, described neutral point electric connection resistance device, described resistance-grounded system.
6. grounding transformer according to claim 5, it is characterized in that, described iron core locating support, comprise four root posts, column lower end is connected with positioning base by flange, and column is along the distribution of iron core both sides, and column upper end is provided with sphere of movements for the elephants shape framework and forms an entirety, the crossbeam of this framework is provided with positioning screw, and the screw rod other end is connected on flute profile upper clamping piece.
7. the grounding transformer according to claim 1 or 2 or 4 or 6, it is characterized in that, described coil location support, comprise four root posts, column lower end is connected with positioning base by flange, column is along the distribution of iron core both sides, and two root post upper ends of every side are provided with " day " glyph framework, and framework is by upper cushion block coil pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520124821.6U CN204407147U (en) | 2015-03-03 | 2015-03-03 | A kind of grounding transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520124821.6U CN204407147U (en) | 2015-03-03 | 2015-03-03 | A kind of grounding transformer |
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| CN204407147U true CN204407147U (en) | 2015-06-17 |
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| CN201520124821.6U Expired - Fee Related CN204407147U (en) | 2015-03-03 | 2015-03-03 | A kind of grounding transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551776A (en) * | 2016-01-27 | 2016-05-04 | 丹东欣泰电气股份有限公司 | Novel resin cast dry-type grounding transformer |
| CN106768509A (en) * | 2016-11-22 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | A kind of adjustable testing transformer of winding stress |
| WO2018133517A1 (en) * | 2017-01-19 | 2018-07-26 | 山东电力设备有限公司 | Magnetic flux leakage compensation structure |
| CN109727752A (en) * | 2019-01-26 | 2019-05-07 | 蓉中电气股份有限公司 | A kind of natural esters insulating oil distribution transformer |
| CN109786085A (en) * | 2019-01-26 | 2019-05-21 | 蓉中电气股份有限公司 | A kind of natural esters transformer that insulation effect is good |
-
2015
- 2015-03-03 CN CN201520124821.6U patent/CN204407147U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551776A (en) * | 2016-01-27 | 2016-05-04 | 丹东欣泰电气股份有限公司 | Novel resin cast dry-type grounding transformer |
| CN106768509A (en) * | 2016-11-22 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | A kind of adjustable testing transformer of winding stress |
| WO2018133517A1 (en) * | 2017-01-19 | 2018-07-26 | 山东电力设备有限公司 | Magnetic flux leakage compensation structure |
| US10923272B2 (en) | 2017-01-19 | 2021-02-16 | Shandong Power Equipment Co., Ltd. | Magnetic flux leakage compensation structure |
| CN109727752A (en) * | 2019-01-26 | 2019-05-07 | 蓉中电气股份有限公司 | A kind of natural esters insulating oil distribution transformer |
| CN109786085A (en) * | 2019-01-26 | 2019-05-21 | 蓉中电气股份有限公司 | A kind of natural esters transformer that insulation effect is good |
| CN109727752B (en) * | 2019-01-26 | 2020-07-14 | 蓉中电气股份有限公司 | Natural ester insulating oil distribution transformer |
| CN109786085B (en) * | 2019-01-26 | 2020-07-14 | 蓉中电气股份有限公司 | Natural ester transformer with good insulation effect |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20170303 |
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| CF01 | Termination of patent right due to non-payment of annual fee |