CN216487671U - Indoor fixed mother row type current transformer - Google Patents
Indoor fixed mother row type current transformer Download PDFInfo
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- CN216487671U CN216487671U CN202122912449.3U CN202122912449U CN216487671U CN 216487671 U CN216487671 U CN 216487671U CN 202122912449 U CN202122912449 U CN 202122912449U CN 216487671 U CN216487671 U CN 216487671U
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- current transformer
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Abstract
The utility model relates to a high-voltage measuring and protecting device of an electric power system, in particular to an indoor fixed bus-bar type current transformer. The coil body is sealed in the insulator, wherein the insulator is in a square tubular structure, a primary bus bar port for a bus bar to pass through is formed in the center of the insulator, and bus bar fixing bosses for being connected with the bus bar are arranged on two sides of the insulator; and a secondary wiring terminal is arranged at the top of the insulator. The utility model is cast by epoxy resin, and has the advantages of small volume, standardization, high mechanical strength, aging resistance, long service life and vibration impact resistance.
Description
Technical Field
The utility model relates to a high-voltage measuring and protecting device of an electric power system, in particular to an indoor fixed bus-bar type current transformer.
Background
The indoor fixed mother row type current transformer is used as a device for current measurement and relay protection, and the technical requirements of the current transformer are very strict along with the requirements of national power plant construction and development and the continuous improvement of installed capacity. The current transformer at the outlet end of the old transformer has a plurality of problems which are mainly shown in the following aspects: the product has large volume and low standardization coefficient, and a primary busbar outlet and a transformer outlet bar cannot be reasonably matched mainly by using a conventional mutual inductor of a power system, so that a lot of material waste exists; secondly, the mechanical strength is low, the insulation form is mainly a plastic shell, and the plastic shell is often broken when being installed and used and needs special protection; thirdly, the aging resistance degree is poor, the service life is short, the influence of high environmental temperature in normal operation is caused, the main material of the product is aged in advance, and the service life of the product is greatly reduced; and fourthly, the mechanical vibration impact resistance is poor, and because the vibration of the normal operation of the matched transformer or the vibration influence of the operation environment, the fixing mode of the product cannot completely meet the use requirement, the phenomenon of fixing looseness often occurs, and the maintenance personnel are required to maintain frequently. The problems are the main problems troubling switch cabinet manufacturers and the hidden danger of the safe operation of complete equipment, and the design of the indoor fixed busbar type current transformer needs to be innovated and updated.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide an indoor fixed busbar type current transformer, so as to solve the problems of large volume, poor standardization, low mechanical strength, poor aging resistance, short service life, poor mechanical vibration impact resistance, etc. of the current transformer used in the switch cabinet of the existing power system.
In order to achieve the purpose, the utility model adopts the technical scheme that:
an indoor fixed busbar type current transformer comprises an insulator and a coil body sealed in the insulator, wherein the insulator is of a square tubular structure, a primary busbar port for a busbar to penetrate through is formed in the center of the insulator, and busbar fixing bosses for being connected with the busbar are arranged on two sides of the insulator; and a secondary wiring terminal is arranged at the top of the insulator.
The bus bar fixing bosses on two sides are symmetrically arranged above the primary bus bar port, and each bus bar fixing boss is provided with two bus bar fixing screws used for being connected with the bus bars.
And reinforcing ribs used for being connected with the busbar fixing lug bosses are arranged on two sides of the insulator.
The primary bus port is of a rectangular structure.
And a nameplate is embedded at the top of the insulator.
The secondary wiring terminal is arranged at one end of the insulator, a secondary wiring cover is covered on the outer side of the insulator, and the secondary wiring cover is sealed through a lead sealing nail.
The insulator is cast into an integral structure with the coil body by adopting epoxy resin.
The coil body comprises an iron core with an annular structure and a secondary winding wound on the iron core.
The utility model has the following advantages and beneficial effects:
1. small size and standardization: the utility model adopts the epoxy resin to cast into an integrated square cylinder type structure, has small volume and light weight, and realizes the butt joint with the busbar in the cabinet because the primary busbar hole of the product is a rectangular hole.
2. High mechanical strength, aging resistance and long service life; the integral structure is formed by pouring epoxy resin, the product is not influenced by the temperature of the environment, and the product has higher mechanical strength, temperature resistance and ageing resistance and longer service life.
3. Vibration impact resistance and convenient installation: the utility model adopts the busbar fixing bolt to fasten the primary busbar, so that the product has better vibration impact resistance, and can be installed at a proper position, thereby ensuring the convenience and rapidness of on-site installation of the product.
Drawings
Fig. 1 is a schematic structural diagram of an indoor fixed busbar type current transformer according to the utility model;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a top view of FIG. 1;
in the figure: 1 is the iron core, 2 is secondary winding, 3 is secondary binding post, 4 is secondary connection cover, 5 is the lead sealing nail, 6 is female arranging set screw, 7 is the data plate, 8 is the insulator, 9 is a bus mouth, 10 is female arranging fixed boss, 11 is the strengthening rib.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the indoor fixed busbar type current transformer provided by the utility model comprises an insulator 8 and a coil body sealed in the insulator 8, wherein the insulator 8 is in a square tubular structure, a primary busbar port 9 for a busbar to pass through is arranged in the center of the insulator 8, and busbar fixing bosses 10 for connecting the busbar are arranged on two sides of the insulator 8; the top of the insulator 8 is provided with a secondary terminal 3.
In the embodiment of the utility model, the busbar fixing bosses 10 on two sides are symmetrically arranged above two ends of the primary busbar port 9, and each busbar fixing boss 10 is provided with two busbar fixing screws 6 for connecting with a busbar. The mounting position of the busbar fixing screw 6 can be adjusted according to the thickness, shape and position of the busbar so as to fix the busbar.
Specifically, each bus bar fixing boss 10 is embedded with an insert with a threaded through hole, and the bus bar fixing bolt 6 penetrates through the insert with the threaded through hole to be fixed with the bus bar.
Further, both sides of the insulator 8 are provided with reinforcing ribs 11 for connecting with the busbar fixing bosses 10. The top of insulator 8 is inlayed and is equipped with data plate 7, and data plate 7 adopts and inlays the mode and pour into an organic whole with the product, prevents to change the data plate, has prevented to steal the electricity in order to change the number of turns of punching the heart and cause.
In the embodiment of the utility model, the primary bus bar port 9 is of a rectangular structure, and can meet the requirement that a bus bar with the width of 120mm or less passes through.
Specifically, the secondary wiring terminal 3 is arranged at one end of the insulator 8 in the length direction, the secondary wiring cover 4 is covered on the outer side of the insulator, and the secondary wiring cover 4 is sealed through a lead seal nail 5, so that the purposes of dust prevention and electricity larceny prevention are achieved.
In the embodiment of the utility model, the coil body comprises an iron core 1 in an annular structure and a secondary winding 2 wound on the iron core 1. The insulator 8 is cast into an integral structure with the coil body by adopting epoxy resin.
The utility model provides an indoor fixed bus-bar type current transformer, which comprises the following specific manufacturing processes:
the secondary winding 2 is uniformly wound on the annular iron core 1 to form a coil body with a secondary wiring terminal 3 and the secondary winding 2; the secondary winding 2 is fixed on a mould by using a special resin cushion block, and is formed by pouring and curing epoxy resin after the distance is adjusted, so that the secondary winding is provided with a secondary wiring terminal 3, the main body of the secondary winding is in a horizontally placed square-tube shape, and the secondary winding 2 is sealed inside the secondary winding; the section of the primary bus port 9 is rectangular, and is used as a transition port of the primary bus when the primary bus port is installed and used, and different rectangular sizes can be made according to different current sizes of the outgoing line end of the transformer; the mounting bottom plate is in a special shape, is directly poured in the integral structure, is tightly connected with the integral structure, and has a relatively vibration and impact resistant function; the bus bar fixing bolt type structure is convenient for flexible installation of the transformer; the utility model adopts the secondary wiring cover 4 and the embedded nameplate 7, so that the product has stronger function of preventing electricity theft.
When the transformer primary busbar is used, the transformer primary busbar directly penetrates through the primary busbar port 9, and the busbar fixing boss 10 is fixedly connected with the proper position of the busbar by using the busbar fixing screw 6 to complete the electrical and mechanical connection of a high-voltage electric field; then the secondary cable is electrically and mechanically connected, and the installation is finished.
The utility model provides an indoor fixed bus-bar type current transformer, which is a new product designed completely according to national standards, is formed by pouring epoxy resin, adopts a coiled iron core, utilizes an electromagnetic conversion principle and an electric field distribution principle to ensure that secondary current can accurately reflect the change condition of primary current to be measured and is transmitted to a secondary metering and controlling device to be used as current measurement and relay protection; the method is widely used in power system transformer devices. The utility model has the advantages of small volume, standardization, high mechanical strength, aging resistance, long service life and vibration and impact resistance.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (8)
1. An indoor fixed busbar type current transformer is characterized by comprising an insulator (8) and a coil body sealed in the insulator (8), wherein the insulator (8) is of a square cylindrical structure, a primary busbar port (9) for a busbar to penetrate through is formed in the center of the insulator, and busbar fixing bosses (10) for being connected with the busbar are arranged on two sides of the insulator (8); and a secondary wiring terminal (3) is arranged at the top of the insulator (8).
2. The indoor fixed busbar type current transformer according to claim 1, wherein busbar fixing bosses (10) on two sides are symmetrically arranged above the primary busbar port (9), and two busbar fixing screws (6) for connecting with the busbar are arranged on each busbar fixing boss (10).
3. An indoor fixed busbar type current transformer according to claim 2, wherein reinforcing ribs (11) for connecting with the busbar fixing bosses (10) are arranged on two sides of the insulator (8).
4. An indoor fixed busbar type current transformer according to claim 1, wherein the primary bus bar port (9) is of a rectangular structure.
5. An indoor fixed busbar type current transformer according to claim 1, wherein a nameplate (7) is embedded at the top of the insulator (8).
6. An indoor fixed busbar type current transformer according to claim 1, wherein the secondary wiring terminal (3) is arranged at one end of the insulator (8), and the outer side is covered with a secondary wiring cover (4), and the secondary wiring cover (4) is sealed by a lead seal nail (5).
7. The indoor fixed busbar type current transformer according to claim 1, wherein the insulator (8) is cast in an integral structure with the coil body by epoxy resin.
8. The indoor fixed busbar type current transformer according to claim 7, wherein the coil body comprises an iron core (1) in a ring structure and a secondary winding (2) wound on the iron core (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122912449.3U CN216487671U (en) | 2021-11-25 | 2021-11-25 | Indoor fixed mother row type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122912449.3U CN216487671U (en) | 2021-11-25 | 2021-11-25 | Indoor fixed mother row type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216487671U true CN216487671U (en) | 2022-05-10 |
Family
ID=81400290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122912449.3U Active CN216487671U (en) | 2021-11-25 | 2021-11-25 | Indoor fixed mother row type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216487671U (en) |
-
2021
- 2021-11-25 CN CN202122912449.3U patent/CN216487671U/en active Active
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