CN106128721A - A kind of CVT electromagnetic unit intermediate transformer - Google Patents
A kind of CVT electromagnetic unit intermediate transformer Download PDFInfo
- Publication number
- CN106128721A CN106128721A CN201610663373.6A CN201610663373A CN106128721A CN 106128721 A CN106128721 A CN 106128721A CN 201610663373 A CN201610663373 A CN 201610663373A CN 106128721 A CN106128721 A CN 106128721A
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- China
- Prior art keywords
- winding
- electromagnetic unit
- intermediate transformer
- iron core
- unit intermediate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
A kind of CVT electromagnetic unit intermediate transformer, including housing and the iron core being located in housing；Described iron core is hollow；One side of described iron core is wound with the first insulating barrier, Secondary Winding, the second insulation winding layer, a winding and the 3rd insulating barrier the most successively；A described section of winding coiling；Described iron core, it is filled with insulating resin between winding and Secondary Winding one time.Present configuration is compact, and volume is little, lightweight, and material-saving saves energy, and winding method is convenient, and precision is high, and open circuit loss is low, and office's electric discharge is little.
Description
Technical field
The present invention relates to CVT technical field, particularly a kind of CVT electromagnetic unit intermediate transformer.
Background technology
In recent years, along with the update of grid equipment, capacitance type potential transformer (CVT) the most progressively instead of tradition
Electromagnetic potential transformer.Capacitance type potential transformer is mainly by capacitive divider, intermediate transformer, compensation reactor and resistance
The element compositions such as Buddhist nun's device.He is to utilize capacitive divider by high voltage drop to middle pressure, then drops to low pressure through intermediate transformer,
Service voltage is measured and the signal sampling device of relay protection.
Intermediate transformer in crude oil immersion electromagnetic unit, its core structure is become " day " font ferrum by stalloy closed assembly
Core, volume are big, material is many, and processing technique is complicated, easily make to be subject to inside stalloy under the effects such as shearing, punching press boring, screw
To destroying, and then permeability declines, and flows the defects such as whirlpool increases, unloaded iron loss is high, easily generate heat, noise is big, and also can affect precision
Etc. technical specification.
The intermediate transformer structure of CVT have passed through development and change repeatedly, from " C " that laminated core is the most widely used
Shaped iron core, either volume or iron loss have all had than in the past and have been obviously improved.But the intermediate transformer of existing CVT, generally uses
, even if being docking, still can there is gap, sealing in single c-type iron core or be docking integrally by least two c-type iron core
Difference, thus produce leakage field phenomenon, cause permeability to decline.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of prior art to provide a kind of compact conformation, volume is little, and material-saving saves
Can, permeability is high, the CVT electromagnetic unit intermediate transformer that office's electric discharge is little.
The technical scheme is that a kind of CVT electromagnetic unit intermediate transformer, including housing be located in housing
Iron core；Described iron core is hollow；One side of described iron core be wound with the most successively the first insulating barrier, Secondary Winding,
Second insulating barrier, a winding and the 3rd insulating barrier；A described section of winding coiling.
Further, a described winding connects through insulation boss and leads to an outlet terminal of outside.
Further, the cross sectional shape of described insulation boss is trapezoidal.
Further, the structure of a described section of winding coiling is: the number of turn of every section of coiling is identical, every period of winding generation
One layer of table, is provided with the 4th insulating barrier between adjacent layer.
Further, described Secondary Winding connects through regulation outlet box and leads to the secondary outlet terminal of outside, described tune
Plush copper regulation bolt is set in joint outlet box.
Further, the inner chamber of described regulation outlet box is concave.
Further, the quantity of described plush copper regulation bolt is 8 ~ 16.
Further, described first insulating barrier, the second insulating barrier, the 3rd insulating barrier and the 4th insulating barrier are cable insulation
Insulating resin it is filled with, by vacuum pouring encapsulated moulding between paper, and housing and iron core.
Further, the downside of described iron core is provided with full skirt.
Further, the top of described regulation outlet box is sealed by lid.
Further, a described outlet terminal and secondary outlet terminal are all drawn with high-temperature insulation flexible cord.
Beneficial effects of the present invention:
(1) port type iron core makes compact overall structure, and volume is little, lightweight, and material-saving saves energy；
The segmentation winding structure of (2) windings has been effectively ensured the uniformity of field intensity, greatly reduces local discharging level, its
Local discharging level is less than or equal to 10PC；
(3) leakage impedance is little, and permeability is high, and no-load current is less than 200mA；
(4) error precision can reach more than 0.2 grade；
(5) design of regulation outlet box and plush copper regulation bolt can increase creep age distance, reinforced insulation intensity, it is to avoid produces electric leakage
Phenomenon.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the structural representation of embodiment of the present invention winding technique；
Fig. 3 is the structural representation of section of winding coiling of the embodiment of the present invention；
Fig. 4 is another structural representation of section of winding coiling of the embodiment of the present invention.
Detailed description of the invention
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
As shown in Figure 1: the CVT electromagnetic unit intermediate transformer of the present embodiment includes housing 1, iron core 2, and housing is fixed on
On installing plate 10.
Iron core 2 is arranged in housing 1, and iron core 2 can use the stalloy of strip to be rolled into a mouthful word by R shape or stairstepping
Type is rolled up, and substitutes common blade inserting day font iron core or c-type iron core.Owing to port type iron core is an enclosed construction, it is whole
Body compact conformation, need not be firm with bolt, and on the one hand the length of magnetic path is short, and volume is little, lightweight, it is possible to make a winding 3 and two
Secondary winding 4 saves steel disc and the steel of 1/4th relatively；On the other hand, owing to not havinging gap so that leakage impedance is little,
Permeability is high, and no-load current is less than 200mA, is difficult to saturated, and error precision can reach more than 0.2 grade；Additionally, also can against shock,
Acceleration of transportation can be more than 2m/s2。
As shown in Figure 2: it is exhausted that a side of iron core 2 is wound with the first insulating barrier 5, Secondary Winding 4, second the most successively
6, winding 3 of edge layer and the 3rd insulating barrier 7；Winding 3 is segmentation winding structure.Winding 3 of the present embodiment refers to
High pressure winding, Secondary Winding 4 refers to low pressure winding.Winding construction designed by the present embodiment, its winding 3 turns to by section
Type, it is possible to decrease the voltage strength between every layer line circle, and it is respectively provided with insulation between iron core and winding 3, a Secondary Winding 4
Layer, forms reliable and effective shielding construction, the uniformity of field intensity has been effectively ensured, has greatly reduced local discharging level, its office
Portion's discharge level is less than or equal to 10PC, and technique is strict control.
The structure of winding 3 segmentation coiling is: the number of turn of every section of coiling is identical, and every section of winding represents one layer, phase
Insulating resin it is provided with between adjacent bed.Such as, as shown in Figure 3: the coil turn assuming a winding 3 is 300 circles, existing once around
The winding of group is typically directly to be wound on one layer, i.e. 300 circles；And the winding of the present embodiment is: by 300 circle coil 32 points three sections
Coiling, every section, around 100 circles, i.e. represents one layer, is always divided into three layers of coiling, and every layer is 100 circles, and is provided with the 4th between adjacent layer
Insulating barrier 31.Or, as shown in Figure 4: by the 32 points of six sections of coilings of 300 circle coil, every section, around 50 circles, is always divided into six layers of coiling,
Every layer is 50 circles, and is provided with the 4th insulating barrier 31 between adjacent layer.The segmentation winding structure of winding 3 of the present embodiment can
Being substantially reduced the voltage strength of interlayer, the uniformity of field intensity is effectively ensured, reduce local discharging level, its local discharging level is little
In equal to 10PC, technique is strict control.
It addition, the present embodiment only one side to port type iron core carries out coiling rather than at the equal coiling of dual-side, it is
In order to prevent leakage field phenomenon, it is greatly improved permeability.
Wherein, first insulating barrier the 5, second insulating barrier the 6, the 3rd insulating barrier 7 is cable insulating paper, is thus greatly improved
The insulating properties of each coil interlayer.Being also filled with insulating resin between housing 1 and iron core 2, the insulating resin of the present embodiment is epoxy
Resin, it is preferable that fill encapsulated moulding by vacuum pouring.So, 2, winding 3 of iron core and Secondary Winding 4 can be fixed
Integral, on the one hand make compact overall structure, on the other hand, during life-time service, do not have insulation degradation phenomenon, produce
Product insulation is sufficiently stable, Full closed dry optimized Structure Design, it is ensured that product has reliable moistureproof anti-condensation performance, Bu Huiyin
Electrical leakage, discharge problem occurs for the condensation of product surface, considerably increases mechanical strength and the anti-short circuit capability of coil windings.
The intermediate transformer compact conformation of embodiment, volume is little, lightweight, and material-saving saves energy, and winding method is convenient, precision
Height, open circuit loss is low, and office's electric discharge is little.
In the present embodiment, a winding 3 connects through insulation boss 8 and leads to an outlet terminal 31 of outside, insulation
The cross sectional shape of boss 8 is the most trapezoidal.Why outlet terminal (i.e. a high-voltage connection terminal) 31 is from insulation for the present embodiment
Boss 8 is drawn, forms the space closed, be not exposed in air produce leaky.Outlet is high pressure resistant heatproof
Insulated flexible cord, can directly connect with the capacitive divider of CVT.
Secondary Winding 4 connects through regulation outlet box 9 and leads to the secondary outlet terminal (i.e. low-voltage wiring terminal) of outside
41, set 14 plush copper regulation bolts 91 in regulation outlet box 9.The top of regulation outlet box 9 is provided with lid 92, forms a sealing
Cavity, inner chamber is concave.By arranging plush copper regulation bolt 91, creep age distance, reinforced insulation intensity not only can be increased, moreover it is possible to
Avoid water route, electric discharge phenomena will not be produced；And error transfer factor can be carried out by plush copper regulation bolt 91.Such as, by 14 plush coppers
Two plush copper regulation bolts in regulation bolt 91 connect main winding, 6 groups of tune on remaining 12 plush copper regulation bolt connection pair limit
Joint winding, its leading-out terminal is plush copper structure, after being adapted, is all enclosed in regulation outlet box 9, adds soft insulating glue material
Material, insulation safety is reliable.
Secondary outgoing line is heatproof insulated flexible cord, can directly and CVT electromagnetic unit secondary outgoing line plate connect.
It addition, the downside of iron core 2 is provided with full skirt 21, use absolutely with secondary outlet terminal 41 making an outlet terminal 31
Edge line and while not exposing in air, arranges full skirt 21 and can be effectively improved insulation creep distance, reach safe and reliable purpose.
Generally speaking, the intermediate transformer of the present embodiment has the advantage that (1) compact overall structure, and volume is little, weight
Gently, material-saving saves energy；(2) uniformity of field intensity being effectively ensured, has greatly reduced local discharging level, its local discharging level is little
In equal to 10PC；(3) leakage impedance is little, and permeability is high, and no-load current is less than 200mA；(4) error precision can reach 0.2 grade with
On；(5) design of regulation outlet box and plush copper regulation bolt can increase creep age distance, reinforced insulation intensity, it is to avoid produces electric leakage
Phenomenon.
Claims (10)
1. a CVT electromagnetic unit intermediate transformer, it is characterised in that include housing and the iron core being located in housing；Described
Iron core is hollow；One side of described iron core is wound with the first insulating barrier, Secondary Winding, the second insulation the most successively
Layer, a winding and the 3rd insulating barrier；A described section of winding coiling.
CVT electromagnetic unit intermediate transformer the most according to claim 1, it is characterised in that a described winding connects
An outlet terminal of outside is led to by insulation boss.
CVT electromagnetic unit intermediate transformer the most according to claim 2, it is characterised in that cutting of described insulation boss
Face is shaped as trapezoidal.
4. according to the CVT electromagnetic unit intermediate transformer described in claim 1 or 2 or 3, it is characterised in that described once around
The structure of set of segmentation coiling is: the number of turn of every section of coiling is identical, and every section of winding represents one layer, is provided with the 4th between adjacent layer
Insulating barrier.
5. according to the CVT electromagnetic unit intermediate transformer described in claim 1 or 2 or 3, it is characterised in that described secondary around
Group connects through regulation outlet box and leads to the secondary outlet terminal of outside, sets plush copper regulation bolt in described regulation outlet box.
CVT electromagnetic unit intermediate transformer the most according to claim 5, it is characterised in that described regulation outlet box
Inner chamber is concave.
CVT electromagnetic unit intermediate transformer the most according to claim 5, it is characterised in that described plush copper regulation bolt
Quantity be 8 ~ 16.
CVT electromagnetic unit intermediate transformer the most according to claim 4, it is characterised in that described first insulating barrier,
Two insulating barriers, the 3rd insulating barrier and the 4th insulating barrier are between cable insulating paper, and housing and iron core and are filled with insulating resin,
By vacuum pouring encapsulated moulding.
9. according to the CVT electromagnetic unit intermediate transformer described in claim 1 or 2 or 3, it is characterised in that described iron core
Downside is provided with full skirt.
CVT electromagnetic unit intermediate transformer the most according to claim 5, it is characterised in that described regulation outlet box
Top is sealed by lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663373.6A CN106128721A (en) | 2016-08-15 | 2016-08-15 | A kind of CVT electromagnetic unit intermediate transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663373.6A CN106128721A (en) | 2016-08-15 | 2016-08-15 | A kind of CVT electromagnetic unit intermediate transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106128721A true CN106128721A (en) | 2016-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610663373.6A Pending CN106128721A (en) | 2016-08-15 | 2016-08-15 | A kind of CVT electromagnetic unit intermediate transformer |
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| Country | Link |
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| CN (1) | CN106128721A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107424778A (en) * | 2017-08-21 | 2017-12-01 | 江西亿博自动化设备有限公司 | A kind of intermediate transformer and the dry electromagnetic device using the intermediate transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030146815A1 (en) * | 2002-02-05 | 2003-08-07 | Youdong Zhou | Capacitive voltage transformer |
| CN2821822Y (en) * | 2005-09-12 | 2006-09-27 | 广东四会互感器厂有限公司 | Outdoor dry high voltae capacitance voltage mutual inductor |
| CN201298448Y (en) * | 2008-10-27 | 2009-08-26 | 中国西电电气股份有限公司 | A split type voltage mutual inductor |
| CN203250630U (en) * | 2013-05-13 | 2013-10-23 | 大连北方互感器集团有限公司 | Capacitor voltage transformer electromagnetism unit intermediate transformer |
-
2016
- 2016-08-15 CN CN201610663373.6A patent/CN106128721A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030146815A1 (en) * | 2002-02-05 | 2003-08-07 | Youdong Zhou | Capacitive voltage transformer |
| CN2821822Y (en) * | 2005-09-12 | 2006-09-27 | 广东四会互感器厂有限公司 | Outdoor dry high voltae capacitance voltage mutual inductor |
| CN201298448Y (en) * | 2008-10-27 | 2009-08-26 | 中国西电电气股份有限公司 | A split type voltage mutual inductor |
| CN203250630U (en) * | 2013-05-13 | 2013-10-23 | 大连北方互感器集团有限公司 | Capacitor voltage transformer electromagnetism unit intermediate transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107424778A (en) * | 2017-08-21 | 2017-12-01 | 江西亿博自动化设备有限公司 | A kind of intermediate transformer and the dry electromagnetic device using the intermediate transformer |
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Application publication date: 20161116 |