CN217485315U - Non-excitation switch connection structure and transformer - Google Patents
Non-excitation switch connection structure and transformer Download PDFInfo
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- CN217485315U CN217485315U CN202220422086.7U CN202220422086U CN217485315U CN 217485315 U CN217485315 U CN 217485315U CN 202220422086 U CN202220422086 U CN 202220422086U CN 217485315 U CN217485315 U CN 217485315U
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Abstract
The utility model provides a no excitation switch wiring structure and transformer, include: no excitation switch, short-circuit copper bar and transition lead; the non-excitation switch comprises a fixed contact; the short circuit copper bar comprises a first surface and a second surface, and the first surface and the second surface are opposite surfaces; the fixed contact is connected with the first surface of the short circuit copper bar, and the transition lead is connected with the second surface of the short circuit copper bar. The non-excitation connecting line structure is used for connecting a plurality of tapping leads of the transformer, and meets the tapping requirements of the transformer; the transition lead is reliably connected with the tapping lead of the transformer, so that the probability of heating of the fixed contact and generation of electric arc during operation is reduced, and the transformation ratio error is reduced; the transition lead is connected with the tapping lead of the transformer, and the plurality of transition leads are not limited by pulling force, so that the non-excitation switch is prevented from being damaged, and the service life is prolonged.
Description
Technical Field
The utility model relates to a transformer technical field especially relates to a no excitation switch wiring structure and transformer.
Background
The non-excitation switch is one type of switch, is suitable for a three-phase oil-immersed transformer with rated voltage of 10KV and rated current of 63A or below 125A, and realizes the conversion of a transformer winding tap through the tap conversion of the switch under the condition of no excitation, namely no electricity, so as to adjust the output voltage of the transformer. The temperature of the non-excitation switch in the oil medium is lowest-25 ℃ and highest 100 ℃. The non-excitation switch is one of the core components of the transformer and plays a role in regulating the high-voltage side voltage and connecting a high-voltage lead in the whole structure of the transformer.
The non-excitation switch structure is provided with U, V, W three-phase static contacts, the number of the static contacts cannot meet the number of contacts required by a tapping lead of the transformer, and the tapping requirement of the transformer can be met by changing the number of 3 contacts provided by the switch into 4. The conventional method is to respectively add 1 short-circuit copper bar connected with 3 contacts on two sides of a static contact, open four holes on the copper bar and connect the crimping connectors of 4 branch wires of a lead between 2 copper bars.
However, in the structure, the short-circuit copper bars and the crimping connectors of the branch lines of the transformer are connected and compressed to form gaps, the connection is not reliable, contacts can generate heat during operation, even electric arcs are generated, the branch lines can not conduct current when the connection is serious, no induced voltage is generated on the secondary side, and the transformation ratio error is large.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a no excitation cage type switch line structure and transformer.
The utility model discloses the first aspect provides a no excitation cage type switch line structure, include:
no excitation switch, short-circuit copper bar and transition lead;
the non-excitation switch comprises a fixed contact;
the short-circuit copper bar comprises a first surface and a second surface, and the first surface and the second surface are opposite surfaces;
the fixed contact is connected with the first surface of the short-circuit copper bar, and the transition lead is connected with the second surface of the short-circuit copper bar.
Furthermore, the fixed contact is of a J-shaped structure and comprises a long edge, a short edge and a bent portion, the long edge is connected with the short edge through the bent portion, and the long edge is connected with the first surface of the short-circuit copper bar.
Further, the long side is fixedly connected with the first surface of the short-circuit copper bar.
Further, the short-circuit copper bar is of a sheet structure.
Furthermore, the second surface of the short-circuit copper bar is connected with the transition lead in a welding mode.
Furthermore, one end of the transition lead is a bare end, the other end of the transition lead is a terminal, and the bare end is connected with the terminal through a wire.
Further, the bare end is connected with the second surface of the short-circuit copper bar.
Further, the number of the transition leads is at least four.
Further, the non-excitation switch is of a cage structure.
The utility model discloses the second aspect provides a transformer, the transformer includes the first aspect no excitation switch line structure.
The utility model provides a no excitation switch line structure and transformer has following beneficial effect:
1. the connecting structure of the non-excitation switch achieves the required connecting quantity of the tapping leads of the transformer when the non-excitation switch is connected with the tapping leads of the transformer, and meets the tapping requirements of the transformer by introducing a plurality of transition leads to connect the tapping leads of the transformer;
2. the connecting structure of the non-excitation switch is reliably connected with the tapping lead of the transformer, so that the probability of heating and electric arc generation during the operation of the fixed contact is reduced, and the transformation ratio error is reduced;
3. the non-excitation switch connecting structure is connected with the transformer tapping lead and is not limited by pulling force, so that the non-excitation switch is prevented from being damaged, and the service life of the non-excitation switch is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a connection structure of a non-excitation switch in an embodiment of the present invention;
fig. 2 is a schematic diagram of a connection structure of a part of non-excitation switches in the embodiment of the present invention;
fig. 3 is a schematic diagram of the outgoing connection of the connection structure of the non-excitation switch in the embodiment of the present invention;
in the above figures, 1-switch, 101-fixed contact, 2-short-circuit copper bar and 3-transition lead.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
the embodiment of the utility model provides a no excitation switch wiring structure, figure 1 is the utility model provides a no excitation switch connection structure schematic diagram provides. As shown in fig. 1, the non-excitation switch wiring structure includes a non-excitation switch 1, a short-circuit copper bar 2 and a transition lead 3 as shown in fig. 1. The non-excitation switch 1 comprises a fixed contact 101; the short circuit copper bar 2 comprises a first surface and a second surface, and the first surface and the second surface are opposite surfaces. The fixed contact 101 is connected with the first surface of the short circuit copper bar 2, and the transition lead 3 is connected with the second surface of the short circuit copper bar 2.
As shown in fig. 2, the fixed contact 101 is a J-shaped structure, and includes a long side, a short side, and a bent portion, where the long side is connected to the short side through the bent portion, and the long side is connected to the first surface of the short-circuit copper bar 2; further, the long side is fixedly connected with the first surface of the short-circuit copper bar 2; j-shaped structure's fixed contact 101, simple structure, convenient operation, it is comparatively easy with the fixed connection of short circuit copper bar 2, the fixed mode commonly used has multiple connected modes such as bolted connection, rivet connection and welding, any kind wherein all can be regarded as long limit with the fixed connection mode of short circuit copper bar 2 does not do too much here and prescribe a limit to.
Short circuit copper bar 2 is sheet structure, the second surface of short circuit copper bar 2 adopt welded mode with transition lead wire 3 links to each other. The resistance of short circuit copper bar 2 is minimum, and the current-carrying capacity is big, can reach thousands of amperes usually, can regard as the wire of supplying with the heavy current. Adopt the sheet structure, simple structure, connection convenience, simultaneously, sheet structure ability greatly increased short circuit copper bar 2's effective usable floor area short circuit copper bar 2 is last can be as much as possible set up the welding point, be used for the welding transition lead wire 3.
One end of the transition lead 3 is a bare end, the other end of the transition lead is a wiring end, and the bare end is connected with the wiring end through a wire. The wire between the bare end and the terminal can be set to a length and a degree of bending as desired, for example, the wire can be bent into a buffered arc bend, thereby ensuring that the electrical shape of the transition lead 3 does not change. Further, the bare end is connected with the second surface of the short-circuit copper bar 2.
In addition, the terminal of the transition lead 3 can be used for connecting a tapping lead of a transformer. The wiring end of the transition lead 3 is connected with the tapping lead, and the wiring end of the transition lead 3 and the tapping lead are connected, so that the situation that the transition leads 3 are not pulled when the tapping leads are connected is ensured, the non-excitation switch 1 is not damaged, and the service life is prolonged. The number of the transition leads 3 is at least four, and generally, the number of the tapping leads of the transformer is four, so that the connecting structure of the non-excitation switch meets the requirement of the number of the connecting wires of the transformer.
The non-excitation switch is of a cage type structure, has good heat dissipation performance, reliable contact and strong short-circuit resistance, is suitable for a transformer structure, and plays a role in regulating voltage of a high-voltage side and connecting a high-voltage lead in the whole transformer structure.
The utility model discloses a no excitation switch line simple structure, ingenious, low in production cost, economic effect is good, and the most important has realized the reliable connection of no excitation switch and transformer shunting lead wire, and no excitation switch line structure is when satisfying transformer wiring quantity requirement, and the probability that the fixed contact generates heat and electric arc produces when having reduced the operation reduces the transformation ratio error.
Example 2:
based on the foregoing embodiments, the non-excitation switch connection structure provided in this embodiment considers both the requirement of the transformer connection number and the requirement of reliability, and can be better applied to transformer application scenarios. The non-excitation switch connecting line structure provided by the embodiment comprises a non-excitation switch 1, a short-circuit copper bar 2 and a transition lead 3. The non-excitation switch 1 comprises a fixed contact 101; the short circuit copper bar 2 comprises a first surface and a second surface, and the first surface and the second surface are opposite surfaces. The fixed contact 101 is connected with the first surface of the short circuit copper bar 2, and the transition lead 3 is connected with the second surface of the short circuit copper bar 2. The fixed contact 101 is of a J-shaped structure and comprises a long edge, a short edge and a bent part, wherein the long edge is connected with the short edge through the bent part, and the long edge is connected with the first surface of the short-circuit copper bar 2; further, the long side is fixedly connected with the first surface of the short-circuit copper bar 2; short circuit copper bar 2 is sheet structure, the second surface of short circuit copper bar 2 adopt welded mode with transition lead wire 3 links to each other. One end of the transition lead 3 is a bare end, the other end of the transition lead is a wiring end, and the bare end is connected with the wiring end through a wire. Further, the bare end is connected with the second surface of the short-circuit copper bar 2; as shown in fig. 3, the number of the transition leads 3 is four, and each transition lead 3 is correspondingly connected to a tapping lead of each transformer. The existing transformer generally has four tapping leads, and the four transition leads in the non-excitation switch connecting structure can be connected with the tapping leads of the transformer one by one well by setting the four transition leads in the non-excitation switch connecting structure, so that the requirement on the number of the connecting wires of the transformer can be met, and the service life of the non-excitation switch can be guaranteed.
The embodiment solves the problems that a gap can be generated after the compression joint connection of the short-circuit copper bar and the tapping lead of the transformer is compressed, the short-circuit copper bar and the tapping lead of the transformer cannot be reliably connected, a contact can generate heat during operation, even electric arc is generated, a tapping circuit cannot conduct current seriously, no induced voltage is generated on a secondary side, and a transformation ratio error is large. The non-excitation switch connecting line has the advantages of simple and ingenious structure, low production cost and good economic effect.
Example 3:
based on the foregoing embodiment, the present invention further provides a transformer, wherein the transformer includes the non-excitation switch connection structure of any one of the foregoing embodiments 1-2. It should be noted that the technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the scope of the present description should be considered. The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A non-excitation switch wiring structure is characterized by comprising:
no excitation switch, short-circuit copper bar and transition lead;
the non-excitation switch comprises a fixed contact;
the short circuit copper bar comprises a first surface and a second surface, and the first surface and the second surface are opposite surfaces;
the fixed contact is connected with the first surface of the short circuit copper bar, and the transition lead is connected with the second surface of the short circuit copper bar.
2. The non-excitation switch wiring structure according to claim 1, wherein the fixed contact is a J-shaped structure and comprises a long side, a short side and a bending portion, the long side is connected with the short side through the bending portion, and the long side is connected with the first surface of the short-circuit copper bar.
3. The non-excitation switch wiring structure according to claim 2, wherein the long side is fixedly connected with the first surface of the short-circuit copper bar.
4. The connecting line structure of the non-excitation switch according to claim 1, wherein the short-circuit copper bar is of a sheet structure.
5. The connecting line structure of the non-excitation switch as claimed in claim 1, wherein the second surface of the short-circuit copper bar is connected with the transition lead by welding.
6. The connecting structure of the non-excitation switch according to claim 1, wherein one end of the transition lead is a bare end and the other end is a terminal, and the bare end and the terminal are connected by a wire.
7. The connecting line structure of claim 6, wherein the bare end is connected to the second surface of the shorted copper bar.
8. The connecting structure of the non-excited switch according to claim 1, wherein the number of the transition leads is at least four.
9. The non-excited switch wiring structure according to claim 1, wherein the non-excited switch is of a cage type structure.
10. A transformer, characterized in that it comprises a connection structure of a non-excited switch according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220422086.7U CN217485315U (en) | 2022-02-28 | 2022-02-28 | Non-excitation switch connection structure and transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220422086.7U CN217485315U (en) | 2022-02-28 | 2022-02-28 | Non-excitation switch connection structure and transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217485315U true CN217485315U (en) | 2022-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220422086.7U Active CN217485315U (en) | 2022-02-28 | 2022-02-28 | Non-excitation switch connection structure and transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217485315U (en) |
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2022
- 2022-02-28 CN CN202220422086.7U patent/CN217485315U/en active Active
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