CN206480496U - A kind of zero sequence current mutual inductor for breaker of plastic casing - Google Patents
A kind of zero sequence current mutual inductor for breaker of plastic casing Download PDFInfo
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- CN206480496U CN206480496U CN201720169906.5U CN201720169906U CN206480496U CN 206480496 U CN206480496 U CN 206480496U CN 201720169906 U CN201720169906 U CN 201720169906U CN 206480496 U CN206480496 U CN 206480496U
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Abstract
The utility model is related to a kind of zero sequence current mutual inductor for breaker of plastic casing, the insulating lid being oppositely arranged including insulating boot and insulating boot, the lower shield assembly being successively set between insulating boot and insulating lid, shielding mutual inductance unit and upper shield assembly, described shielding mutual inductance unit includes internal shield ring, the iron core for being wound with coil and external shield circle that are sequentially sleeved at from inside to outside on internal shield ring being arranged concentrically with insulating boot, and described internal shield ring, iron core are identical with the height of external shield circle.Compared with prior art, the utility model overall structure is simple, compact, assembling is easy, production cost can effectively be lowered, piece, shielding ring and iron core will be shielded and be entirely sealed in the space of a closing, it is completely insulated with the energized conductor that contacts with each other, so as to improve the insulating properties of transformer, reduce the accident that phase fault occurs for breaker, safety and stability, with good application prospect.
Description
Technical field
The utility model belongs to technical field of electronic components, is related to a kind of zero sequence current mutual inductance for breaker of plastic casing
Device.
Background technology
At present, the creepage mutual inductor of the breaker of plastic casing of in the market, all by the way of plastic jacket fills resin seal.Example
Such as, the Chinese patent of Application No. 201020252516.2 discloses a kind of shielding case of zero sequence current mutual inductor, including transformer,
Shell, in addition to support, screen layer, described transformer is on support, and described screen layer is by support wraps, described screen
Cover layer and be located at enclosure.Described screen layer includes inner ring screen layer, outer ring screen layer, preceding screen layer, rear screen layer, described
Inner ring screen layer be located in support inner ring, described outer ring screen layer is located in support outer ring, and described preceding screen layer is attached to
On the preceding surface of support, described rear screen layer is attached to after support on surface.The outmost shielding piece of transformer and breaker three-phase
Conductor, the only insulation resin by one layer of solidification.This insulation mode makes product when in use, there is serious potential safety hazard.By
It is set in around the conductor of heating and uses in transformer, when product works, conductor temp.-elevating, transformer is in a high temperature ring for a long time
In border.Over time, the solidification glue aging on transformer surface, serious meeting cracking.Because shielding piece is silicon steel sheet, it is
Conductor, causes any two-phase in breaker three-phase conductor to occur the security incident probability multiplication of phase fault.
In the market avoids conductor from puncturing by transformer, is all to wind insulating cement on conductor to bring prevention (see Fig. 2).By
It is artificial winding in insulating tape, randomness is than larger.Adhesive tape may exist in the place contacted with transformer gap or by
Damage.If transformer and conductor may result in conductor simultaneously these contact areas are cracking or breakage
Phase fault, causes serious accident.Although this is a low probability event, once occur, consequence is just very serious.
Utility model content
The purpose of this utility model is exactly the defect in order to overcome above-mentioned prior art presence and provides a kind of manufacturing process
Simply, good airproof performance, can effectively improve transformer insulating properties, reduce breaker and occur the disconnected for plastic housing of phase fault accident
The zero sequence current mutual inductor of road device.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of zero sequence current mutual inductor for breaker of plastic casing, including the insulation that insulating boot and insulating boot are oppositely arranged
Lower shield assembly, shielding mutual inductance unit and the upper shield assembly cover, being successively set between insulating boot and insulating lid, described screen
Cover mutual inductance unit include be arranged concentrically with insulating boot internal shield ring, be sequentially sleeved at being wound with internal shield ring from inside to outside
The iron core and external shield circle of coil, described internal shield ring, iron core are identical with the height of external shield circle.
Described insulating boot is the insulating boot with annular groove, and described lower shield assembly is set in the annular of insulating boot
In groove, and it is arranged concentrically with the inner ring of insulating boot.
Described lower shield assembly is stacked gradually by several lower shielding pieces and formed.
Described internal shield ring is set in the inner ring of insulating boot, and the inwall of internal shield ring is close to the inner ring of insulating boot
Outer wall is set, and medial surface, the lateral surface of described iron core are close to the inwall setting of the outer wall of internal shield ring, external shield circle respectively.
Described upper shield assembly, which shields piece on several and stacked gradually, to be formed, the overall diameter D of described upper shielding pieceOn
The overall diameter D of piece is shielded under ＜Under, and the interior diameter d of described upper shielding pieceOnThe interior diameter d of piece is shielded under ＞Under。
Form first annular gap between described upper shield assembly and the inner ring of insulating boot, described upper shield assembly with
The second annular gap is formed between the outer shroud of insulating boot, described insulating lid is the insulating lid with annular groove, the insulating lid
Inner ring, outer shroud is adapted with first annular gap, the second annular gap respectively.
Described insulating boot is provided with outwardly terminals, the terminals and offers wiring hole, described insulating lid
Provided with the lead wire press head being adapted with terminals.
The utility model zero sequence current mutual inductor uses insulating lid with groove, and left-hand thread is on insulating boot.Insulating boot with absolutely
The interlaced occlusion of groove inside and outside wall of edge lid, increases creep age distance of the shielding piece to the external world topmost.Shielding piece, shielding
Circle and iron core are entirely sealed in the space of a closing, completely insulated with the energized conductor that contacts with each other, so as to improve mutual inductance
The insulating properties of device, reduce the accident that phase fault occurs for breaker.
In practical set, if dry plate thickness first is washed into ring-type for 0.3mm-0.5mm cold rolling non-oriented electrical steel band
Lower shielding piece be inserted in the annular groove of insulating boot, it is lower shielding piece keep and insulating boot inner ring it is concentric, if dry plate is superimposed upon
Together, then diameter internal shield ring less than normal is enclosed in the inner ring of insulating boot, the inwall of shielding ring is close to the inner ring of insulating boot
Outer wall, then the inwall of iron core is close to the outer wall of internal shield ring in the outside of internal shield ring the iron core sleeve of belt coil；Iron core is adopted
With two groups of coil windings, 4 the end of a thread of coil are allowed to be stretched from 4 wiring holes of insulating boot terminals, and then in iron
The outside of core, is equally inserted in external shield circle, the inwall of external shield circle is close on the outer wall of iron core, and the outer wall of external shield circle is tight
It is attached on the outer shroud inwall of insulating boot, keeps internal shield ring, iron core and external shield circle three highly consistent.Then, in inner shield
If the upper surface of circle, iron core and external shield circle, which is sequentially overlapped on dry plate, shields piece, upper shielding piece is inserted in the groove of insulating boot, on
Shield piece holding and the inner ring of insulating boot is concentric, the overall diameter D of upper shielding pieceOnThan the overall diameter D of lower shielding pieceUnderIt is small, and upper screen
Cover the interior diameter d of pieceOnThan the interior diameter d of lower shielding pieceUnderGreatly, the upper shielding piece 2 after being so superimposed just forms 2 with insulating boot 1
Individual annular space (i.e. first annular gap, the second annular gap)；Then can pour resin in insulating boot, carry out sealing and
It is fixed, before resin is dry, insulating lid left-hand thread is entered in insulating boot, makes the lead wire press head of insulating lid and the terminals pair of insulating boot
Together, the inner ring of insulating lid is inserted in first annular gap, and outer shroud is inserted in the second annular gap, is compressed insulating lid, is made insulating lid
Bottom portion of groove face be adjacent to the annular upper end face of insulating boot, it is ensured that insulating boot is arranged concentrically with insulating lid, after resin dries, i.e.,
Can.
Compared with prior art, the utility model has the characteristics that：
1) by insulating boot with the groove inside and outside wall of insulating lid is interlaced is engaged, increase topmost shielding piece to the external world
Creep age distance, makes the insulating properties between conductor and silicon steel sheet obtain more reliable guarantee, even if conductor does not twine adhesive tape, also will not
There is the failure of phase fault；
2) overall structure is simple, compact, and assembling is easy, can effectively lower production cost, by shielding piece, shielding ring and iron core
It is completely insulated with the energized conductor that contacts with each other in the space for being entirely sealed in a closing, so as to improve the insulation of transformer
Performance, reduces the accident that phase fault occurs for breaker, safety and stability, with good application prospect.
Brief description of the drawings
Fig. 1 is the utility model configuration schematic diagram；
Fig. 2 is the utility model overall structure diagrammatic cross-section；
Fig. 3 is the diagrammatic cross-section that the utility model does not install insulating lid；
Fig. 4 is the utility model insulating boot structural representation；
Fig. 5 is the structural representation for the iron core that the utility model is wound with coil；
Fig. 6 is the utility model insulating lid structural representation；
Description of symbols in figure：
The lower shielding piece in 1-insulating boot, 2-above shielding piece, 3-iron core, 4-internal shield ring, 5-insulating lid, 6-, 7-it is outer
Shielding ring, 8-terminals, 9-wiring hole, 10-coil, 11-lead wire press head, 12-first annular gap, the 13-the second ring
Shape gap.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment：
As shown in figures 1 to 6, a kind of zero sequence current mutual inductor for breaker of plastic casing, including insulating boot 1 and insulating boot 1
The insulating lid 5 being oppositely arranged, the lower shield assembly being successively set between insulating boot 1 and insulating lid 5, shielding mutual inductance unit and on
Shield assembly, internal shield ring 4 that shielding mutual inductance unit includes being arranged concentrically with insulating boot 1, is sequentially sleeved at interior screen from inside to outside
Cover the iron core 3 and external shield circle 7 that are wound with coil 10 on circle 4, the height phase of internal shield ring 4, iron core 3 and external shield circle 7
Together.Insulating boot 1 is provided with outwardly terminals 8, the terminals 8 and offers wiring hole 9, and insulating lid 5 is provided with and wiring
The lead wire press head 11 that end 8 is adapted.
Wherein, insulating boot 1 is the insulating boot 1 with annular groove, and lower shield assembly is set in the annular groove of insulating boot 1
In, and be arranged concentrically with the inner ring of insulating boot 1.Lower shield assembly is stacked gradually by several lower shielding pieces 6 and formed.Internal shield ring
4 are set in the inner ring of insulating boot 1, and internal shield ring 4 inwall be close to insulating boot 1 endocyclic outer wall set, iron core 3 it is interior
Sideways, lateral surface is close to the outer wall of internal shield ring 4 respectively, the inwall of external shield circle 7 is set.
Upper shield assembly, which shields piece 2 on several and stacked gradually, to be formed, the overall diameter D of upper shielding piece 2OnPiece is shielded under ＜
6 overall diameter DUnder, and the interior diameter d of upper shielding piece 2OnThe interior diameter d of piece 6 is shielded under ＞Under.Upper shield assembly and insulating boot 1
Inner ring between formed between first annular gap 12, the outer shroud of upper shield assembly and insulating boot 1 and form the second annular gap 13,
Insulating lid 5 is the insulating lid 5 with annular groove, the inner ring of the insulating lid 5, outer shroud respectively with first annular gap 12, second
Annular gap 13 is adapted.
In practical set, if dry plate thickness first is washed into ring-type for 0.3mm-0.5mm cold rolling non-oriented electrical steel band
Lower shielding piece 6 be inserted in the annular groove of insulating boot 1, lower shielding piece 6 keeps concentric with the inner ring of insulating boot 1, if dry plate is folded
It is added together, then diameter internal shield ring 4 less than normal is enclosed in the inner ring of insulating boot 1, the inwall of internal shield ring 4 is close to insulation
The endocyclic outer wall of cover 1, then the iron core 3 of belt coil 10 is enclosed on the outside of internal shield ring 4, the inwall of iron core 3 is close to inner shield
The outer wall of circle 4；Iron core 3 allows 4 the end of a thread of coil 10 to be connect from 4 of the terminals 8 of insulating boot 1 using two groups of windings of coil 10
Stretched in string holes 9, and then in the outside of iron core 3, be equally inserted in external shield circle 7, the inwall of external shield circle 7 is close to iron
On the outer wall of core 3, the outer wall of external shield circle 7 is close on the outer shroud inwall of insulating boot 1, keeps internal shield ring 4, iron core 3 and outer
The three of shielding ring 7 is highly consistent.Then, if being sequentially overlapped in the upper surface of internal shield ring 4, iron core 3 and external shield circle 7 on dry plate
Piece 2 is shielded, upper shielding piece 2 is inserted in the groove of insulating boot 1, upper shielding piece 2 holding and the inner ring of insulating boot 1 are concentric, upper shielding
The overall diameter D of piece 2OnThan the overall diameter D of lower shielding piece 6UnderIt is small, and the interior diameter d of upper shielding piece 2OnThan the interior diameter of lower shielding piece 6
dUnderGreatly, the upper shielding piece 2 after being so superimposed just forms 2 annular spaces (i.e. first annular gap 12, second with insulating boot 1
Annular gap 13)；Then resin can be poured in insulating boot 1, is sealed and is fixed, before resin is dry, insulating lid 5
Left-hand thread enters in insulating boot 1, the lead wire press head 11 of insulating lid 5 is alignd with the terminals 8 of insulating boot 1, the inner ring insertion of insulating lid 5
In first annular gap 12, outer shroud is inserted in the second annular gap 13, is compressed insulating lid 5, is pasted the bottom portion of groove face of insulating lid 5
The annular upper end face of tight insulating boot 1, it is ensured that insulating boot 1 is arranged concentrically with insulating lid 5, after resin dries, you can.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using practicality
It is new.Person skilled in the art obviously can easily make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiment without passing through performing creative labour.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art disclose according to of the present utility model, do not depart from improvement that the utility model category made and
Modification all should be within protection domain of the present utility model.
Claims (7)
1. a kind of zero sequence current mutual inductor for breaker of plastic casing, it is characterised in that including insulating boot (1) and insulating boot (1)
Insulating lid (5), the lower shield assembly being successively set between insulating boot (1) and insulating lid (5), the shielding mutual inductance list being oppositely arranged
First and upper shield assembly, internal shield ring (4) that described shielding mutual inductance unit includes being arranged concentrically with insulating boot (1), by introversion
The outer iron core (3) for being wound with coil (10) and the external shield circle (7) being sequentially sleeved on internal shield ring (4), described interior screen
Cover circle (4), iron core (3) identical with the height of external shield circle (7).
2. a kind of zero sequence current mutual inductor for breaker of plastic casing according to claim 1, it is characterised in that described
Insulating boot (1) is the insulating boot (1) with annular groove, and described lower shield assembly is set in the annular groove of insulating boot (1)
In, and be arranged concentrically with the inner ring of insulating boot (1).
3. a kind of zero sequence current mutual inductor for breaker of plastic casing according to claim 2, it is characterised in that described
Lower shield assembly is stacked gradually by several lower shielding pieces (6) and formed.
4. a kind of zero sequence current mutual inductor for breaker of plastic casing according to claim 3, it is characterised in that described
Internal shield ring (4) is set in the inner ring of insulating boot (1), and the inwall of internal shield ring (4) is close to outside the inner ring of insulating boot (1)
Wall is set, medial surface, the lateral surface of described iron core (3) be close to respectively the outer wall of internal shield ring (4), external shield circle (7) it is interior
Wall is set.
5. a kind of zero sequence current mutual inductor for breaker of plastic casing according to claim 4, it is characterised in that described
Upper shield assembly, which shields piece (2) on several and stacked gradually, to be formed, the overall diameter D of described upper shielding piece (2)OnShielded under ＜
The overall diameter D of piece (6)Under, and the interior diameter d of described upper shielding piece (2)OnThe interior diameter d of piece (6) is shielded under ＞Under。
6. a kind of zero sequence current mutual inductor for breaker of plastic casing according to claim 5, it is characterised in that described
First annular gap (12), described upper shield assembly and insulating boot are formed between the inner ring of upper shield assembly and insulating boot (1)
(1) the second annular gap (13) is formed between outer shroud, described insulating lid (5) is the insulating lid (5) with annular groove, should
The inner ring of insulating lid (5), outer shroud are adapted with first annular gap (12), the second annular gap (13) respectively.
7. a kind of zero sequence current mutual inductor for breaker of plastic casing according to any one of claim 1 to 6, its feature exists
In described insulating boot (1) is provided with outwardly terminals (8), the terminals (8) and offers wiring hole (9), described
Insulating lid (5) is provided with the lead wire press head (11) being adapted with terminals (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720169906.5U CN206480496U (en) | 2017-02-24 | 2017-02-24 | A kind of zero sequence current mutual inductor for breaker of plastic casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720169906.5U CN206480496U (en) | 2017-02-24 | 2017-02-24 | A kind of zero sequence current mutual inductor for breaker of plastic casing |
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| Publication Number | Publication Date |
|---|---|
| CN206480496U true CN206480496U (en) | 2017-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720169906.5U Active CN206480496U (en) | 2017-02-24 | 2017-02-24 | A kind of zero sequence current mutual inductor for breaker of plastic casing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802467A (en) * | 2018-05-04 | 2018-11-13 | 国网浙江宁波市奉化区供电有限公司 | A kind of iron core line ring type current transformer and earth detector that accuracy of detection is high |
| CN108831721A (en) * | 2018-06-27 | 2018-11-16 | 阳光电源股份有限公司 | Transformer insulated component and transformer |
| CN111326316A (en) * | 2020-03-17 | 2020-06-23 | 浙江宏凯吉科技有限公司 | Open type mutual inductor shell and assembling method |
| CN111354553A (en) * | 2020-03-17 | 2020-06-30 | 浙江宏凯吉科技有限公司 | Open type mutual inductor with shielding structure |
-
2017
- 2017-02-24 CN CN201720169906.5U patent/CN206480496U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802467A (en) * | 2018-05-04 | 2018-11-13 | 国网浙江宁波市奉化区供电有限公司 | A kind of iron core line ring type current transformer and earth detector that accuracy of detection is high |
| CN108802467B (en) * | 2018-05-04 | 2023-12-29 | 国网浙江省电力有限公司宁波市奉化区供电公司 | Iron core coil type current transformer with high detection precision and electric leakage detection device |
| CN108831721A (en) * | 2018-06-27 | 2018-11-16 | 阳光电源股份有限公司 | Transformer insulated component and transformer |
| CN111326316A (en) * | 2020-03-17 | 2020-06-23 | 浙江宏凯吉科技有限公司 | Open type mutual inductor shell and assembling method |
| CN111354553A (en) * | 2020-03-17 | 2020-06-30 | 浙江宏凯吉科技有限公司 | Open type mutual inductor with shielding structure |
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