CN206432135U - Current transformer for gas-insulated switchgear - Google Patents
Current transformer for gas-insulated switchgear Download PDFInfo
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- CN206432135U CN206432135U CN201720114519.1U CN201720114519U CN206432135U CN 206432135 U CN206432135 U CN 206432135U CN 201720114519 U CN201720114519 U CN 201720114519U CN 206432135 U CN206432135 U CN 206432135U
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Abstract
The utility model provides a kind of current transformer for gas-insulated switchgear, including primary winding winding (21) and at least one secondary coil winding (22), primary winding winding (21) passes through secondary coil winding (22), described primary winding winding (21) is the copper rod of a straight, and high-voltage terminal (23) is located at the two ends of copper rod (21).Primary winding winding (21) is provided at both ends with high-tension shielding (24), such as aluminium net or copper mesh.Secondary coil winding (22) includes the winding of iron core secondary coil more than one (220).Current transformer is integrated poured using epoxy resin.
Description
Technical field
The utility model is related to technical field of electricity, and in particular to the current transformer skill for gas-insulated switchgear
Art field.
Background technology
In power system, current transformer is the equipment for connecting primary system and electrical secondary system, is the meter of power system
Amount and relay protection provide the information of accurate and standard, are indispensable components in switch cubicle.Gas (it is now conventional as
SF6) insulated switch cabinet (GIS) is due to its small volume, and floor space is small, and the advantages of class of insulation is high is widely used in electricity
In Force system.
In usual GIS, the high-tension current inductor installed in plenum interior, using block transformer, is poured with epoxy resin
Type, its volume is larger, and spent material is more, complex manufacturing, carries out simple marginal data below with a kind of existing product.
Figure 1A -1B are the structural representations of the existing current transformer for gas-insulated switchgear, wherein, Figure 1A
For profile, Figure 1B is three-dimensional structure diagram.Block current transformer includes primary winding winding 11 and secondary coil winding 12, by
Poured with epoxy resin is formed.The end of primary winding winding 11 once coil windings terminal 111, for connecting high-pressure side.
Primary winding winding 11 is passed through from secondary coil winding 12, and primary winding winding terminals 111 are arranged on primary line
The two ends of winding copper rod are enclosed, the primary winding winding 11 of installation is in alphabetical " u "-shaped；Primary winding winding 11 and secondary coil
It is major insulation between winding 12；Current transformer is integrally integrated using poured with epoxy resin.
Existing current transformer as shown in Figure 1A and 1B uses block structure, and primary winding winding 11 is in letter
, there is following subject matter in " u "-shaped：
1) in the case of same conductor sectional area, the equivalent straight line length of primary winding winding 11 is big, then primary winding winding
11 resistance increase, caloric value is more, and consumption copper material is more；
2) primary winding winding terminals 111 are using techniques, complex manufacturing, processing cost such as copper bar bending and welding
It is high；
3) primary winding winding 11 employs the mode of three assembling parts, and contact resistance is big, and package size is also not easy
Control；
4) appearance and size of whole current transformer is big, causes switch cubicle size big.
Utility model content
The subject matter existed for the above-mentioned existing current transformer for gas-insulated switchgear, this practicality is new
Type provides a kind of current transformer for gas-insulated switchgear, and it includes primary winding winding and at least one secondary line
Winding is enclosed, primary winding winding passes through secondary coil winding, and described primary winding winding is the copper rod of a straight, high-voltage connecting
Line end is located at the two ends of copper rod.
According to a most preferred embodiment of the present utility model, primary winding winding is provided at both ends with high-tension shielding.
According to a most preferred embodiment of the present utility model, the high-tension shielding is aluminium net or copper mesh；Or be metallic plate
Such as copper coin, aluminium sheet or stainless steel plate.
According to a most preferred embodiment of the present utility model, the secondary coil winding is annular.
According to a most preferred embodiment of the present utility model, secondary coil winding include iron core secondary coil more than one around
Group；Many iron core secondary coil windings are included at least two iron cores, respectively the first iron core and the second iron core, each iron core
It is connected in parallel between the coil being wound with coil, and at least two iron core.
According to a most preferred embodiment of the present utility model, current transformer is integrated poured using epoxy resin.
Current transformer of the present utility model for gas-insulated switchgear, effectively reduces current transformer once
Coil windings resistance, so as to reduce caloric value；And supplies consumption can be reduced, reduce cost；Transformer can also be reduced simultaneously
Size, the switch cubicle for making it be applied to small size.
Brief description of the drawings
Figure 1A -1B are the structural representations of the existing current transformer for gas-insulated switchgear, wherein, Figure 1A
For profile, Figure 1B is three-dimensional structure diagram.
Fig. 2A -2B are the knots of current transformer one most preferred embodiment of the present utility model for gas-insulated switchgear
Structure schematic diagram, wherein, Fig. 2A is profile, and Fig. 2 B are three-dimensional structure diagram.
Fig. 3 is that the structure of current transformer one most preferred embodiment of the present utility model for gas-insulated switchgear is shown
It is intended to, wherein there is at least one secondary coil to include multiple iron cores.
Embodiment
With reference to each accompanying drawing, the current transformer of the present utility model for gas-insulated switchgear is described in detail
Structure and function.
Fig. 2A -2B are the structural representations of the current transformer of the present utility model for gas-insulated switchgear, its
In, Fig. 2A is profile, and Fig. 2 B are three-dimensional structure diagram.Current transformer of the present utility model is including primary winding winding 21 and extremely
A few secondary coil winding 22, primary winding winding 21 passes through secondary coil winding 22, and primary winding winding 21 is one straight
The copper rod of shape, high-voltage terminal 23 is located at the two ends of copper rod 21.
Hole 231 is provided with high-voltage terminal 23, for high-pressure connection line to be fixed.
In structure chart shown in Fig. 2A -2B, signal secondary coil winding 22 does not have several in detail.Another shown in Fig. 3
In most preferred embodiment, secondary coil winding 22 includes three.Below in conjunction with Fig. 3, secondary coil winding is described in detail.
According to a most preferred embodiment of the present utility model, primary winding winding 21 is provided at both ends with high-tension shielding 24.Institute
It can be aluminium net or copper mesh to state high-tension shielding 24.Can also be metallic plate, such as aluminium sheet, copper coin or stainless steel plate.Aluminium net phase
To copper mesh, cheaper, pliability is also more preferable.Aluminium sheet is relative to copper coin or stainless steel plate, it may have cheap, flexible
The good advantage of property.High-tension shielding 24 is used for the influence for avoiding field strength distribution inequality from producing；
According to a most preferred embodiment of the present utility model, secondary coil winding 22 is annular.
Fig. 3 is the structural representation of the most preferred embodiment of current transformer one of the present utility model, wherein have at least one two
Secondary coil winding is many iron core secondary coil windings 220,230.In embodiment as shown in Figure 3, secondary coil winding 22 includes
Three, be respectively single iron core secondary coil winding 210, many iron core secondary coil windings 220 and many iron core secondary coil windings
230.Many iron core secondary coil windings include at least two iron cores.Such as, many iron core secondary coil windings 220 include first
Coil, respectively the first iron-core coil 223 and the second iron-core coil are wound with the iron core 222 of iron core 221 and second, each iron core
It is connected in parallel between coil on 224, and at least two iron core.
Similarly, many iron core secondary coil windings 230 include being wound with coil, and described three on three iron cores, each iron core
It is connected in parallel between coil on individual iron core.
According to a most preferred embodiment of the present utility model, the first iron core line of described many iron core secondary coil windings 220
Circle 223 is identical with the number of turn of the second iron-core coil 224.The number of turn is identical, is conducive to the calculating of the number of turn, due to many iron core secondary coils around
The first iron-core coil 223 and the number of turn of the second iron-core coil 224 of group are in parallel, contrast the secondary coil of existing single iron core around
Under group, equivalent parameters, the first iron-core coil of many iron core secondary coil windings 223 and the second iron-core coil of secondary coil winding 224
The number of turn is twice.Equally, many iron core secondary coil windings 230 in the current transformer shown in Fig. 3, three iron cores
Can be identical with the number of turn of coiling wire, the coiling number of turn of each iron core is three times.
According to the iron core quantity of many iron core secondary coil windings in parallel, the number of turn of iron core coil winding is improved, so that
The number of ampere turns of many iron core secondary coil windings is improved, to meet error and the output capacity requirement of many iron core secondary coil windings.
Further, due to improving the numbers of turn of many iron core secondary coil windings, each many iron core secondary coils are around packet size
It can reduce a lot, after parallel connection, total secondary coil can be smaller than existing current transformer around packet size, save size empty
Between.
According to a most preferred embodiment of the present utility model, current transformer is integrated poured using epoxy resin.
Current transformer of the present utility model for gas-insulated switchgear, with least advantages below：
1) equivalent length and contact resistance of primary winding winding can be reduced, so as to reduce the overall electricity of primary winding winding
Resistance, reduces caloric value；
2) primary winding winding is using the copper rod of a rectilinear form, and simply, part processing cost is low for technique；
3) compact using the current transformer structure of new departure, small volume is lightweight, can meet in reduced size switch
The requirement installed in cabinet；
4) dependable performance, cost is low, simple in construction, it is easy to plant produced.
In summary, the current transformer of the present utility model for gas-insulated switchgear, effectively reduces electric current mutual
The primary winding winding resistance of sensor, so as to reduce caloric value；And supplies consumption can be reduced, reduce cost；Simultaneously can also
Reduce transformer size, the switch cubicle for making it be applied to small size.
Although disclosing preferred embodiment of the present utility model and accompanying drawing for the purpose of illustration, skilled
Personnel, do not depart from the utility model and appended spirit and scope by the claims in, can make it is various replace, change and moisten
Decorations.Therefore, the utility model should not be limited to preferred embodiment and accompanying drawing disclosure of that, protection domain of the present utility model
It is defined by the scope of which is defined in the appended claims.
Claims (7)
1. a kind of current transformer for gas-insulated switchgear, including primary winding winding (21) and at least one is secondary
Coil windings (22), primary winding winding (21) passes through secondary coil winding (22), it is characterised in that：Described primary winding around
Group (21) is the copper rod of a straight, and high-voltage terminal (23) is located at the two ends of copper rod (21).
2. the current transformer according to claim 1 for gas-insulated switchgear, it is characterised in that：Primary winding
Winding (21) is provided at both ends with high-tension shielding (24).
3. the current transformer according to claim 2 for gas-insulated switchgear, it is characterised in that：The high pressure
It is aluminium net or copper mesh to shield (24).
4. the current transformer according to claim 2 for gas-insulated switchgear, it is characterised in that：The high pressure
It is metallic plate to shield (24).
5. the current transformer for gas-insulated switchgear according to claim 1-4 any one, its feature exists
In：The secondary coil winding (22) is annular.
6. the current transformer according to claim 5 for gas-insulated switchgear, it is characterised in that：It is described secondary
Coil windings (22) include the winding of iron core secondary coil more than one (220)；Many iron core secondary coil windings include at least two
Coil, and at least two iron are wound with individual iron core, respectively the first iron core (221) and the second iron core (222), each iron core
It is connected in parallel between coil on core.
7. the current transformer according to claim 6 for gas-insulated switchgear, it is characterised in that：Current Mutual Inductance
Device is integrated poured using epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720114519.1U CN206432135U (en) | 2017-02-07 | 2017-02-07 | Current transformer for gas-insulated switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720114519.1U CN206432135U (en) | 2017-02-07 | 2017-02-07 | Current transformer for gas-insulated switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206432135U true CN206432135U (en) | 2017-08-22 |
Family
ID=59591676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720114519.1U Active CN206432135U (en) | 2017-02-07 | 2017-02-07 | Current transformer for gas-insulated switchgear |
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| Country | Link |
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| CN (1) | CN206432135U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658118A (en) * | 2017-10-29 | 2018-02-02 | 刘正南 | Current transformer for gas-insulated switchgear |
| CN112447385A (en) * | 2020-12-03 | 2021-03-05 | 国创新能源汽车智慧能源装备创新中心(江苏)有限公司 | High-power electric leakage mutual inductor for copper bar measurement |
| WO2023028986A1 (en) * | 2021-09-03 | 2023-03-09 | Abb Schweiz Ag | Winding assembly and current transformer |
-
2017
- 2017-02-07 CN CN201720114519.1U patent/CN206432135U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658118A (en) * | 2017-10-29 | 2018-02-02 | 刘正南 | Current transformer for gas-insulated switchgear |
| CN112447385A (en) * | 2020-12-03 | 2021-03-05 | 国创新能源汽车智慧能源装备创新中心(江苏)有限公司 | High-power electric leakage mutual inductor for copper bar measurement |
| WO2023028986A1 (en) * | 2021-09-03 | 2023-03-09 | Abb Schweiz Ag | Winding assembly and current transformer |
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