CN115708175A - Cable connection device and transformer - Google Patents
Cable connection device and transformer Download PDFInfo
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- CN115708175A CN115708175A CN202110960256.7A CN202110960256A CN115708175A CN 115708175 A CN115708175 A CN 115708175A CN 202110960256 A CN202110960256 A CN 202110960256A CN 115708175 A CN115708175 A CN 115708175A
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- current transformer
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Abstract
The invention discloses a cable wiring device which comprises a grounding device, a current transformer, a cable box and a connecting cable arranged in the cable box, wherein one end of the connecting cable is connected with a lead cable of a transformer winding, the other end of the connecting cable is connected with a line cable terminal, an insulating layer is wrapped on the outer side of the connecting cable, the current transformer is arranged on the cable box, and the grounding device is used for butt-jointing and grounding the current transformer and the cable box. In the cable connecting device, when the cable connecting device is used, the cable box is installed on a transformer box body, the grounding safety of the cable connecting device is guaranteed through the grounding device, the measurement and overload protection of the load current of the transformer are achieved through the current transformer, one end of the connecting cable is connected with the transformer winding lead cable, the other end of the connecting cable is connected with a line cable terminal, the oil-oil sleeve is prevented from being used for transition, the multiple connection of the connecting cable is reduced, and the potential safety hazard of the operation of the transformer is reduced.
Description
Technical Field
The invention relates to the technical field of power transformer manufacturing, in particular to a cable wiring device. The invention also relates to a transformer comprising the cable wiring device.
Background
In a transformer, for example, when a large power transformer with a voltage of 110kV class is connected by a high-voltage side cable, because the voltage is high, an oil-oil sleeve is usually used when a high-voltage winding lead of the transformer passes through an oil tank of the transformer, so as to help the transformer to complete the installation of a current transformer and realize the load protection of the measurement class of the load current of the transformer.
Because the oil-oil sleeve is needed to be used for transition, the cables are connected for many times, and hidden troubles exist in the operation of the transformer.
Therefore, how to reduce the potential safety hazard of the transformer operation is a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a cable wiring device to reduce potential safety hazards of transformer operation. Another object of the present invention is to provide a transformer including the above cable connection device.
In order to achieve the purpose, the invention provides a cable connection device which comprises a grounding device, a current transformer, a cable box and a connecting cable arranged in the cable box, wherein one end of the connecting cable is connected with a transformer winding lead cable, the other end of the connecting cable is connected with a line cable terminal, an insulating layer is wrapped on the outer side of the connecting cable, the current transformer is arranged on the cable box, and the grounding device is used for butt-jointing and grounding the current transformer and the cable box.
Preferably, the cable box is provided with a first mounting hole used for wiring with a transformer winding lead cable on the connecting cable and a second mounting hole used for wiring with a line cable terminal on the connecting cable, the first plugging piece is used for opening and closing the first mounting hole, and the second plugging piece is used for opening and closing the second mounting hole.
Preferably, the first mounting hole and the second mounting hole are hole body structures with different shapes.
Preferably, the transformer junction box also comprises a current transformer core ring and a transformer junction box, and external wires of the current transformer core ring are led to the transformer junction box.
Preferably, the cable box further comprises a cable holder arranged inside the cable box, wherein the cable holder is used for supporting the connecting cable.
Preferably, the cable holder is a laminated paperboard.
Preferably, the current transformer is mounted at a bottom end of the cable box.
Preferably, a valve body used for oil injection and drainage of the cable box is arranged on the current transformer.
Preferably, the cable box is filled with oil inside when the cable box is sealed.
A transformer comprising a cable termination device, the cable termination device being any one of the cable termination devices described above.
In the technical scheme, the cable connection device provided by the invention comprises a grounding device, a current transformer, a cable box and a connecting cable arranged in the cable box, wherein one end of the connecting cable is connected with a lead cable of a transformer winding, the other end of the connecting cable is connected with a line cable terminal, an insulating layer is wrapped on the outer side of the connecting cable, the current transformer is arranged on the cable box, and the grounding device is used for butt-jointing and grounding the current transformer and the cable box.
According to the cable connection device, during use, the cable box is installed on the transformer box body, grounding safety of the cable connection device is guaranteed through the grounding device, measurement and overload protection of transformer load current are achieved through the current transformer, one end of the connecting cable is connected with a transformer winding lead cable, the other end of the connecting cable is connected with a line cable terminal, transition is avoided through an oil-oil sleeve, multiple connection of the connecting cable is reduced, and potential safety hazards of transformer operation are reduced.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a view of an installation position of a cable connection device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cable connection device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a cable box according to an embodiment of the present invention;
FIG. 4 is a side view of the cable box of FIG. 3;
fig. 5 is a schematic structural diagram of a current transformer according to an embodiment of the present invention;
FIG. 6 is a side view of the current transformer shown in FIG. 5;
FIG. 7 is a schematic structural diagram of a connection cable according to an embodiment of the present invention;
FIG. 8 is an enlarged view of the X portion of the connecting cable shown in FIG. 7;
FIG. 9 is an enlarged view of the Y-section of the connecting cable shown in FIG. 7;
FIG. 10 is a diagram illustrating the connection location of the connection cable with the lead cable of the transformer winding according to the embodiment of the present invention;
FIG. 11 is a diagram of the connection location with a line cable termination on a connection cable provided by an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a first hanging member of a cable holder according to an embodiment of the present invention;
fig. 13 is a schematic structural view of a second suspension member of the cable holder according to the embodiment of the invention;
fig. 14 is a view showing an installation position of the grounding device according to the embodiment of the present invention;
fig. 15 is a schematic structural diagram of a transformer according to an embodiment of the present invention.
Wherein in FIGS. 1-15:
1. a cable box; 2. connecting a cable;
3. a cable holder; 3-1, a first hanging piece; 3-2, a first cable mounting groove; 3-3, a second pendant; 3-4, a second cable mounting groove;
4. a first mounting hole; 5. a second mounting hole; 6. a current transformer; 7. a current transformer core ring; 8. a transformer junction box; 9. a ball valve; 10. a line cable termination; 11. a support; 12. a transformer tank body; 13. a transformer winding lead cable; 14. a grounding device; 15. an insulating layer.
Detailed Description
The core of the invention is to provide a cable wiring device to reduce the potential safety hazard of transformer operation. Another core of the present invention is to provide a transformer including the above cable connection device.
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Please refer to fig. 1 to fig. 15.
In one embodiment, the cable connection device according to an embodiment of the present invention includes a grounding device 14, a current transformer 6, a cable box 1, and a connection cable 2 installed in the cable box 1. The cable box 1 and the side part of the transformer box body 12 can be installed through round flange bolts, and oil-oil sleeve transition is omitted.
In order to improve the installation stability of the cable connection device, the bottom of the cable box 1 is fixed on the side of the transformer tank 12 through a bracket 14.
The cable box 1 can be made of Q235 steel plates, and the inside and the outside of the cable box are subjected to rust removal and paint spraying.
During assembly, the side flange of the cable box 1 is flanged with the transformer box 12, and the transformer box 12 is a transformer mailbox. The top of cable box 1 can set up the flange, goes up the flange and is connected with interim test device.
Specifically, the grounding device 14 is made of stainless steel grounding nut and 10mm 2 Cable assembly, grounding of the user equipment housing.
The current transformer 6 is used for measuring the load of the transformer.
One end of the connecting cable 2 is connected with the transformer winding lead cable 13, the other end is connected with the line cable terminal 10, the outer side of the connecting cable 2 is wrapped with an insulating layer 15, specifically, the insulating layer 15 can be made of insulating paper, and the wrapping thickness of the insulating layer 15 is matched with the voltage grade.
The current transformer 6 is mounted on the cable box 1, and the grounding device 14 is used for grounding the current transformer 6 and the cable box 1, specifically, the end of the connecting cable 2 is connected and mounted with the line cable terminal 10 through a flange. The connection cable 2 may be a copper stranded wire whose gauge is matched to the load current.
It can be known from the above description that, in the cable connection device provided in this embodiment of the present application, the grounding safety of the cable connection device is ensured by the grounding device 14, the measurement and overload protection of the load current of the transformer are realized by the current transformer 6, one end of the connection cable 2 is connected to the transformer winding lead cable 13, and the other end is connected to the line cable terminal 10, so as to avoid using an oil-oil casing for transition, reduce the number of connections of the connection cable 2, and reduce the potential safety hazard of the operation of the transformer.
In a specific implementation mode, the cable connection device further comprises a first blocking piece and a second blocking piece, a first mounting hole 4 used for being connected with a transformer winding lead cable 13 on the connecting cable 2 and a second mounting hole 5 used for being connected with a line cable terminal 10 on the connecting cable 2 are formed in the cable box 1, the first blocking piece is used for opening and closing the first mounting hole 4, and the second blocking piece is used for opening and closing the second mounting hole 5. Specifically, the first mounting hole 4 and the second mounting hole 5 may have the same shape. In order to facilitate timely knowing of the end mounting structure of the connecting cable 2, preferably, the first mounting hole 4 and the second mounting hole 5 are hole structures with different shapes. Specifically, the first mounting hole 4 and the first blocking piece form a round hand hole for connecting a lead cable 13 of the transformer winding. The second mounting hole 5 and the second block form a square-hand hole for the connection of the line cable termination 10.
In particular, the grounding device 14 is also used for flange butt grounding of the transformer tank 12.
In order to improve the installation stability of the connection cable 2, it is preferable that the cable connection device further includes a cable holder 3 provided inside the cable box 1, the cable holder 3 being for supporting the connection cable 2.
Specifically, the cable holder 3 is a laminated paperboard. The cable support 3 is made of laminated paperboards and used for clamping the cable connection position and fixedly connecting the cable 2. Specifically, the cable support 3 comprises a first hanger 3-1 fixedly connected with the cable box 1 and a second hanger 3-3 connected with the first hanger 3-1, a first cable installation groove 3-2 is formed in the first hanger 3-1, a second cable installation groove 3-4 is formed in the second hanger 3-3, and after the first hanger 3-1 and the second hanger 3-3 are fixed, the first cable installation groove 3-2 and the second cable installation groove 3-4 are matched to form a hole body structure for clamping the connecting cable 2. Specifically, the first hanger may be installed on the top of the cable box 1 for realizing top suspension of the connection cable 2.
When the connecting cable 2 is required to be connected, the round hand hole of the cable box 1 is opened, the cable bracket 3 is installed, and the connecting cable 2 wrapped with the insulating layer 15 is placed in the cable box 1. Connecting cable 2 is installed on cable support 3, and one end and transformer winding lead wire cable 13 bolted connection finish, and the connector position parcel is insulating, and thickness is with connecting cable 2, and the round hand hole seals. Then, the square hand hole of the cable box 1 is opened, the other end of the connecting cable 2 is connected to the line cable terminal 10 of the line, and the square hand hole is closed after the bolt is fastened.
In one embodiment, the cable connection device further comprises a current transformer core ring 7 and a transformer terminal box 8, and external wires of the current transformer core ring 7 are led to the transformer terminal box 8. When the transformer is installed, the transformer junction box 8 is opened, and the current ratio signal is led into the terminal box by using a signal cable according to the label of the wiring terminal and the drawing.
Specifically, the current transformer core ring 7 is arranged in the current transformer 6 and comprises 1 measuring-stage transformer core ring and 2 protecting-stage transformer core rings, so that the measurement and overload protection of the load current of the transformer are realized; the core ring 7 of the current transformer has the functions of measurement and protection, and the current ratio is determined according to the capacity and the voltage of the transformer. The secondary current ratio of the core ring 7 of the current transformer is determined according to the capacity and the voltage of the transformer and is used for measuring load current and overload protection; the external line of the transformer core ring leads to the transformer junction box 8, and the junction box determines the number of the heads according to the transformation ratio number of the transformer core ring so as to be convenient for externally connecting a signal cable.
In one embodiment, the cable box 1 is filled with oil when the cable box 1 is sealed. Specifically, the current transformer 6 is provided with a valve body for oil injection and drainage of the cable box 1. Wherein, the valve body can be ball valve 9, and is concrete, and ball valve 9 is 25 ball valves, and of course 9 specifications of ball valve can select other as required, through setting up the oil drain of notes when the valve body is used for installation and dismantlement of cable box 1.
When the cable connection device is used, the cable box 1 and the current transformer 6 are connected and mounted up and down and combined, then the cable box 1 is mounted on the side face of the transformer box body 12 in the side direction, the round flanges are used for butt joint, and the lower support 11 is used for fixing. And opening the round hand hole of the cable box 1, installing the cable bracket 3, and placing the connecting cable 2 wrapped with the insulating layer 15 in the cable box 1. The connecting cable 2 is arranged on the cable support 3, one end of the connecting cable is connected with the transformer winding lead cable 13, after the connection is finished, the connecting head is wrapped with insulation, the thickness of the connecting cable is equal to that of the connecting cable 2, and the round hand hole is closed. And opening the square hand hole, connecting the other end of the connecting cable 2 with the line cable terminal 10, fixing the bolt, and sealing the square hand hole. The cable box 1 is filled with oil together with the transformer in vacuum. The grounding device 14 is installed. And opening the transformer junction box 8, and introducing the current transformation ratio signal into the terminal box by using a signal cable according to the label of the wiring terminal and the drawing.
The application provides a transformer, including cable junction device, wherein cable junction device installs on transformer box 12, and cable junction device is any kind of cable junction device of above-mentioned. The foregoing describes a specific structure of the cable connection device, and the present application includes the above cable connection device, which also has the above technical effects.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a cable junction device, its characterized in that includes earthing device (14), current transformer (6), cable box (1) and installs connecting cable (2) in cable box (1), the one end and transformer winding lead wire cable (13) of connecting cable (2) are connected, and the other end is connected with circuit cable terminal (10), the outside parcel of connecting cable (2) has insulating layer (15), current transformer (6) are installed on cable box (1), earthing device (14) are used for right current transformer (6) with cable box (1) butt joint ground.
2. The cable connection device according to claim 1, further comprising a first plugging member and a second plugging member, wherein the cable box (1) is provided with a first mounting hole (4) for connecting with a transformer winding lead cable (13) on the connection cable (2) and a second mounting hole (5) for connecting with a line cable terminal (10) on the connection cable (2), the first plugging member is used for opening and closing the first mounting hole (4), and the second plugging member is used for opening and closing the second mounting hole (5).
3. The cable termination device according to claim 2, wherein the first mounting hole (4) and the second mounting hole (5) are differently shaped bore structures.
4. The cable connection arrangement as claimed in claim 1, characterized by a current transformer core ring (7) and a transformer junction box (8), the external wiring of the current transformer core ring (7) leading to the transformer junction box (8).
5. The cable connection device according to claim 1, further comprising a cable holder (3) disposed inside the cable box (1), the cable holder (3) being configured to support the connection cable (2).
6. Cable connection device according to claim 5, characterized in that the cable holder (3) is a laminated cardboard.
7. Cable connection device according to claim 1, characterized in that the current transformer (6) is mounted at the bottom end of the cable box (1).
8. The cable connection device according to claim 7, characterized in that the current transformer (6) is provided with a valve body for oil filling and draining of the cable box (1).
9. The cable connection device as claimed in claim 1, characterized in that the cable box (1) is filled with oil internally when the cable box (1) is sealed.
10. A transformer comprising a cable junction device, characterized in that the cable junction device is according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110960256.7A CN115708175A (en) | 2021-08-20 | 2021-08-20 | Cable connection device and transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110960256.7A CN115708175A (en) | 2021-08-20 | 2021-08-20 | Cable connection device and transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115708175A true CN115708175A (en) | 2023-02-21 |
Family
ID=85212421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110960256.7A Pending CN115708175A (en) | 2021-08-20 | 2021-08-20 | Cable connection device and transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115708175A (en) |
-
2021
- 2021-08-20 CN CN202110960256.7A patent/CN115708175A/en active Pending
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