CN218333450U - Coil assembly of voltage transformer - Google Patents
Coil assembly of voltage transformer Download PDFInfo
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- CN218333450U CN218333450U CN202222342014.4U CN202222342014U CN218333450U CN 218333450 U CN218333450 U CN 218333450U CN 202222342014 U CN202222342014 U CN 202222342014U CN 218333450 U CN218333450 U CN 218333450U
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- coil winding
- voltage
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- iron core
- annular iron
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Abstract
The utility model relates to a voltage transformer's coil assembly, including annular iron core, suit secondary coil winding on the annular iron core, secondary lead wire, the suit of setting on secondary coil winding, primary coil winding, the setting primary lead wire on primary coil winding, the semiconductor insulating cylinder of setting between secondary coil winding and primary coil winding of suit on secondary coil winding, annular iron core and secondary winding between be provided with the semiconductor crepe paper, secondary coil winding and semiconductor insulating cylinder between be provided with the electrician's cardboard, primary coil winding on be provided with the voltage-sharing copper foil, the voltage-sharing copper foil on be provided with the voltage-sharing electric screen. The utility model has the advantages of simple structure, stable and reliable performance, good insulating property and low partial discharge.
Description
Technical Field
The utility model relates to a mutual-inductor technical field, concretely relates to voltage transformer's coil assembly.
Background
Voltage transformers are instruments used to transform voltages, similar to transformers. The purpose of voltage transformer transformation is mainly to supply power to measuring instrument and relay protection device, to measure voltage, power and electric energy of line, or to protect valuable equipment, motor and transformer in line when line is in fault. The coil winding assembly of the conventional voltage transformer is unreasonable in structural design and poor in insulation performance, so that the partial discharge of the voltage transformer is high, the coil assembly easily impacts cured epoxy resin, the cured epoxy resin cracks, and the qualified rate of products is low.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a voltage transformer's coil assembly that simple structure, stable performance are reliable, insulating properties is good, low office is put.
In order to achieve the above object, the utility model discloses a voltage transformer's coil assembly, including annular iron core, suit secondary coil winding on annular iron core, set up secondary lead wire, the suit primary winding on secondary coil winding, set up the primary lead wire on primary winding, set up the semiconductor insulating cylinder between secondary coil winding and primary winding, annular iron core and secondary winding between be provided with semiconductor crepe paper, secondary coil winding and semiconductor insulating cylinder between be provided with the electrician cardboard, primary winding on be provided with the voltage-sharing copper foil, the voltage-sharing copper foil on be provided with the voltage-sharing electric screen.
The beneficial effect of above-mentioned structure is: the uniform electric screen is arranged on the primary coil winding, and can effectively improve and balance the high-voltage electric field of the voltage transformer, thereby being beneficial to improving the partial discharge level of the voltage transformer. Therefore, the coil assembly of the voltage transformer has the advantages of simple structure, stable and reliable performance, good insulating performance and low partial discharge.
Particularly, the voltage-sharing screen comprises PMP insulating paper wound on a voltage-sharing copper foil and two silicon rubber strips arranged at two ends of the PMP insulating paper, wherein two ends of each silicon rubber strip are respectively bonded on two sides of the PMP insulating paper, a buffer cavity is formed in each silicon rubber strip, and two ends of the PMP insulating paper are respectively inserted into the buffer cavities of the two silicon rubber strips. The buffer cavity of the silicon rubber strip can slow down the impact of epoxy resin curing on the end face of the primary coil winding, can reduce product cracking, and is favorable for improving the qualification rate of products.
Particularly, the primary lead is in a spiral shape, and a primary copper insert is arranged on the tail part of the primary lead. The primary lead is designed into a spiral shape, and after the epoxy resin is cured, the primary lead can be reliably embedded in the epoxy resin, so that the working reliability of the voltage transformer is improved.
Particularly, a hoisting fixing plate is arranged on the annular iron core, a plurality of hoisting bolts are arranged on the hoisting fixing plate, and an adhesive tape is wound between the annular iron core and the hoisting fixing plate. A hoisting fixing plate is fixed on the annular iron core, so that the coil assembly is conveniently hoisted, the hoisting efficiency is higher, and the working reliability of the voltage transformer is favorably improved.
Drawings
Fig. 1 is a structural diagram of an embodiment of the present invention.
Fig. 2 is a front view of the voltage-sharing screen according to the embodiment of the present invention.
Fig. 3 is a top view of the voltage-sharing screen according to the embodiment of the present invention.
Detailed Description
As shown in fig. 1-3, the embodiment of the present invention is a coil assembly of a voltage transformer, including toroidal core 10, secondary coil winding 11 of suit on toroidal core 10, secondary lead wire 12 of setting on secondary coil winding 11, primary coil winding 13 of suit on secondary coil winding 11, primary lead wire 14 of setting on primary coil winding 13, semiconductor insulating cylinder 15 of setting between secondary coil winding 11 and primary coil winding 13, toroidal core 10 and secondary winding 11 between be provided with semiconductor crepe paper 16, secondary coil winding 11 and semiconductor insulating cylinder 15 between be provided with electrical paper board 17, primary coil winding 13 on be provided with voltage-sharing copper foil 18, voltage-sharing copper foil 18 on be provided with voltage-sharing electric screen 19.
As shown in fig. 2 and 3, the voltage equalizing screen 19 includes PMP insulating paper 191 wound on the voltage equalizing copper foil 18, and two silicone rubber strips 192 disposed on two ends of the PMP insulating paper 191, two ends of the silicone rubber strips 192 are respectively bonded to two sides of the PMP insulating paper 191, a buffer cavity 1921 is formed in the silicone rubber strips 192, and two ends of the PMP insulating paper 191 are respectively inserted into the buffer cavities 1921 of the two silicone rubber strips 192. The buffer cavity of the silicon rubber strip can slow down the impact of epoxy resin curing on the end face of the primary coil winding, can reduce product cracking, and is favorable for improving the qualification rate of products. The primary lead 14 is spiral, and a primary copper insert 20 is arranged on the tail of the primary lead 14. The primary lead is designed into a spiral shape, and after the epoxy resin is cured, the primary lead can be reliably embedded in the epoxy resin, so that the working reliability of the voltage transformer is improved.
As shown in fig. 1, a hoisting fixing plate 20 is disposed on the annular iron core 10, a plurality of hoisting bolts 21 are disposed on the hoisting fixing plate 20, and an adhesive tape 22 is wound between the annular iron core 10 and the hoisting fixing plate 20. A hoisting fixing plate is fixed on the annular iron core, so that the coil assembly is conveniently hoisted, the hoisting efficiency is higher, and the working reliability of the voltage transformer is favorably improved.
The uniform electric screen is arranged on the primary coil winding, and can effectively improve and balance the high-voltage electric field of the voltage transformer, thereby being beneficial to improving the partial discharge level of the voltage transformer. Therefore, the coil assembly of the voltage transformer has the advantages of simple structure, stable and reliable performance, good insulating property and low partial discharge.
Claims (4)
1. A coil assembly of a voltage transformer is characterized in that: the transformer comprises an annular iron core, a secondary coil winding sleeved on the annular iron core, a secondary lead arranged on the secondary coil winding, a primary coil winding sleeved on the secondary coil winding, a primary lead arranged on the primary coil winding, and a semiconductor insulating cylinder arranged between the secondary coil winding and the primary coil winding, wherein semiconductor crepe paper is arranged between the annular iron core and the secondary winding, an electrical paper board is arranged between the secondary coil winding and the semiconductor insulating cylinder, a voltage-sharing copper foil is arranged on the primary coil winding, and a voltage-sharing electric screen is arranged on the voltage-sharing copper foil.
2. The coil assembly of a voltage transformer of claim 1, wherein: the voltage-sharing screen comprises PMP insulating paper wound on a voltage-sharing copper foil and two silicon rubber strips arranged at two ends of the PMP insulating paper, wherein two ends of each silicon rubber strip are respectively bonded on two sides of the PMP insulating paper, a buffer cavity is formed in each silicon rubber strip, and two ends of the PMP insulating paper are respectively inserted into the buffer cavities of the two silicon rubber strips.
3. The coil assembly of a voltage transformer according to claim 1 or 2, wherein: the primary lead is in a spiral shape, and a primary copper insert is arranged on the tail of the primary lead.
4. The coil assembly of a voltage transformer according to claim 1 or 2, wherein: the annular iron core on be provided with the hoist and mount fixed plate, the hoist and mount fixed plate on be provided with a plurality of hoisting bolts, annular iron core and hoist and mount fixed plate between around having the sticky tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222342014.4U CN218333450U (en) | 2022-09-01 | 2022-09-01 | Coil assembly of voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222342014.4U CN218333450U (en) | 2022-09-01 | 2022-09-01 | Coil assembly of voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218333450U true CN218333450U (en) | 2023-01-17 |
Family
ID=84832630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222342014.4U Active CN218333450U (en) | 2022-09-01 | 2022-09-01 | Coil assembly of voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218333450U (en) |
-
2022
- 2022-09-01 CN CN202222342014.4U patent/CN218333450U/en active Active
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