CN209859786U - Low partial discharge voltage transformer - Google Patents
Low partial discharge voltage transformer Download PDFInfo
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- CN209859786U CN209859786U CN201921242149.5U CN201921242149U CN209859786U CN 209859786 U CN209859786 U CN 209859786U CN 201921242149 U CN201921242149 U CN 201921242149U CN 209859786 U CN209859786 U CN 209859786U
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- copper
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- voltage transformer
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- partial discharge
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Abstract
The utility model relates to a voltage transformer is put in low office, including mutual-inductor ware body, setting coil winding assembly in mutual-inductor ware body, coil winding assembly include the iron core, set up secondary coil, two primary windings of suit respectively on secondary coil on the iron core, the copper foil of two primary windings on be provided with a bar copper respectively, two bar copper symmetric distributions, mutual-inductor ware on one's body correspond each bar copper punishment and do not be provided with a copper insert, copper insert and bar copper between be provided with the copper sheathing, the both ends of copper sheathing are threaded connection respectively on copper insert, bar copper. The utility model has the advantages of simple structure, stable and reliable performance, safety and reliability, low partial discharge.
Description
Technical Field
The utility model relates to a voltage transformer, concretely relates to voltage transformer is put in low office.
Background
The voltage transformer is an instrument for transforming voltage on a line, and is mainly used for supplying power to a measuring instrument and a relay protection device, measuring voltage, power and electric energy of the line, or protecting valuable equipment, a motor and a transformer in the line when the line fails. The voltage transformer comprises a transformer body and a coil winding assembly arranged in the transformer body, wherein the coil winding assembly comprises an iron core, a secondary coil arranged on the iron core and a primary coil sleeved on the secondary coil, the insulation of the primary coil and the secondary coil is realized by paper sheets filled between the primary coil and the secondary coil, when epoxy resin is poured, the epoxy resin cannot be soaked between the primary coil and the secondary coil, the insulation strength is poor, and therefore the voltage transformer has the defects of complex structural design, unreliable performance and high partial discharge.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a voltage transformer is put in low office of simple structure, stable performance is reliable, safe and reliable.
In order to realize the above purpose, the utility model discloses a low partial discharge voltage transformer, including mutual-inductor ware body, set up coil winding assembly in mutual-inductor ware body, coil winding assembly include the iron core, set up secondary coil, two primary coils of difference suit on secondary coil on the iron core, two primary coil's copper foil on be provided with a bar copper respectively, two bar copper symmetric distributions, mutual-inductor ware on one's body correspond each bar copper punishment and do not be provided with a copper insert, copper insert and bar copper between be provided with the copper sheathing, threaded connection is on copper insert, bar copper respectively at the both ends of copper sheathing.
The beneficial effect of above-mentioned structure is: be provided with a bar copper that plays supporting role on two primary winding respectively, when pouring epoxy, two copper inserts are fixed respectively in the casting die, and two primary winding are unsettled by two bar copper and are supported in the casting die to epoxy can soak completely between primary winding and secondary coil, has guaranteed the insulating distance between primary winding and the secondary coil, has reduced the partial discharge capacity. And the secondary coil is wound on the epoxy cylinder, and the epoxy cylinder adopts a double-layer shielding structure, so that the partial discharge capacity of the product is effectively reduced, and the voltage transformer has the advantages of simple structure, stable and reliable performance, safety, reliability and low partial discharge.
Particularly, the lower ends of the two copper rods are respectively provided with a bending part, the bending parts are welded on the copper foil, and the upper ends of the two copper rods respectively extend towards two sides in an inclined mode. The upper ends of the two copper rods are inclined and extended towards two sides respectively, so that the distance between the two copper inserts is increased, and the creepage distance is increased.
In particular, two mounting brackets are fixed on the bottom wall of the transformer body. A mounting frame is arranged on the mutual inductor body, so that the voltage mutual inductor is convenient to mount.
Drawings
Fig. 1 is a front view of the embodiment of the present invention.
Fig. 2 is a structural diagram of a coil winding assembly according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-2, the embodiment of the utility model provides a voltage transformer is put in low office, including mutual-inductor ware body 10, set up coil winding assembly 20 in mutual-inductor ware body 10, coil winding assembly 20 include iron core 21, set up secondary coil 22, two primary coil 23 of difference suit on secondary coil 22 on iron core 21, two primary coil 23's copper foil 231 on be provided with a bar copper 24 respectively, two bar copper 24 symmetric distributions, mutual-inductor ware body 10 on correspond each bar copper 24 punishment and do not be provided with a copper insert 25, copper insert 25 and bar copper 24 between be provided with copper sheathing 26, threaded connection is on bar copper insert 25, bar copper 24 respectively at the both ends of copper sheathing 26. The lower extreme of two bar copper all be provided with the portion of bending, the portion of bending weld on the copper foil, the upper end of two bar copper 24 respectively to the slope extension of both sides. The upper ends of the two copper rods are inclined and extended towards two sides respectively, so that the distance between the two copper inserts is increased, and the creepage distance is increased. Two mounting frames 101 are fixed on the bottom wall of the transformer body 10. A mounting frame is arranged on the mutual inductor body, so that the voltage mutual inductor is convenient to mount.
Be provided with a bar copper that plays supporting role on two primary winding respectively, when pouring epoxy, two copper inserts are fixed respectively in the casting die, and two primary winding are unsettled by two bar copper and are supported in the casting die to epoxy can soak completely between primary winding and secondary coil, has guaranteed the insulating distance between primary winding and the secondary coil, has reduced the partial discharge capacity. And the secondary coil is wound on the epoxy cylinder, and the epoxy cylinder adopts a double-layer shielding structure, so that the partial discharge capacity of the product is effectively reduced, and the voltage transformer has the advantages of simple structure, stable and reliable performance, safety, reliability and low partial discharge.
Claims (3)
1. The utility model provides a voltage transformer is put in low office, includes mutual-inductor ware body, sets up the coil winding assembly in mutual-inductor ware body, its characterized in that: the coil winding assembly comprises an iron core, a secondary coil arranged on the iron core, and two primary coils sleeved on the secondary coil respectively, copper foils of the two primary coils are provided with a copper bar respectively, the two copper bars are symmetrically distributed, the mutual inductor is provided with a copper insert at the position corresponding to each copper bar on the body, a copper sleeve is arranged between the copper insert and the copper bar, and two ends of the copper sleeve are in threaded connection with the copper insert and the copper bar respectively.
2. The low partial discharge voltage transformer according to claim 1, wherein: the lower extreme of two bar copper all be provided with the portion of bending, the portion of bending weld on the copper foil, the upper end of two bar copper respectively to the both sides slope extension.
3. The low partial discharge voltage transformer according to claim 1 or 2, characterized in that: and two mounting frames are fixed on the bottom wall of the transformer body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921242149.5U CN209859786U (en) | 2019-08-02 | 2019-08-02 | Low partial discharge voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921242149.5U CN209859786U (en) | 2019-08-02 | 2019-08-02 | Low partial discharge voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209859786U true CN209859786U (en) | 2019-12-27 |
Family
ID=68943261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921242149.5U Active CN209859786U (en) | 2019-08-02 | 2019-08-02 | Low partial discharge voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209859786U (en) |
-
2019
- 2019-08-02 CN CN201921242149.5U patent/CN209859786U/en active Active
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