Metering cabinet

Abstract

The utility model relates to the technical field of electrical metering cabinets, and provides a metering cabinet which comprises a wire inlet chamber, a wire outlet chamber and a mutual inductor chamber, the mutual inductor chamber is internally provided with a CT structure and a bus connector which is transversely arranged at the top of the mutual inductor chamber and comprises an insulating tee joint, an upper opening of the bus connector is connected with a C-shaped sleeve, and a support is sleeved with the bus connector; the end part of the support is conductively connected with the C-shaped sleeves, the two bus connectors are connected through the support, a current transformer is arranged on the support, and the two C-shaped sleeves are respectively arranged in the wire inlet chamber and the wire outlet chamber; the PT structure is vertically arranged on one side of the CT structure and comprises a voltage transformer cable, one end of the voltage transformer cable is connected with an inner cone sleeve, the other end of the voltage transformer cable is connected with a voltage transformer, the inner cone sleeve is arranged in the wire inlet chamber, and the voltage transformer is connected with the metering chamber. The device has the advantages of reducing cost, being convenient to install and saving space size.

Description

A metering cabinet Technical Field

[0001] This application relates to the field of electrical metering cabinet technology, specifically to a metering cabinet. Background Technology

[0002] In the power system high-voltage switchgear industry, there are many ways to connect metering cabinets, including connections between copper rods / copper busbars and connections between cables. Both of these connection methods are widely used in power systems. However, both have some problems. Connections between copper rods are more expensive and require advanced processing technology; connections between cables require sufficient space, and the bending radius of the cables is limited. Summary of the Invention

[0003] To help solve the above-mentioned technical problems, this application provides a metering cabinet, which adopts the following technical solution:

[0004] A metering cabinet includes an inlet compartment, an outlet compartment, a metering compartment, and a current transformer compartment, wherein the current transformer compartment is equipped with:

[0005] The CT structure is horizontally positioned at the top of the transformer chamber. It includes an insulated tee bus connector. The upper opening of the bus connector is connected to the first sleeve. A bracket is installed inside the first sleeve. The end of the bracket is electrically connected to the first sleeve. Two bus connectors are connected through the bracket. A current transformer is installed on the bracket. The two first sleeves are respectively located in the inlet chamber and the outlet chamber.

[0006] The PT structure is vertically installed on one side of the CT structure and includes a voltage transformer cable. One end of the voltage transformer cable is connected to the second bushing, and the other end is connected to the voltage transformer. The second bushing is installed in the incoming line room.

[0007] Preferably, a first copper terminal is provided at the top of the first sleeve, which is used to connect to the busbar of the inlet chamber, and a second copper terminal is provided on one side of the lower part of the first sleeve, which is connected to the end of the support conductor.

[0008] Preferably, the support includes a support housing and a support conductor disposed within the support housing, with both ends of the support conductor extending out from both sides of the support housing, and the ends of the support conductor being electrically connected to the first sleeve.

[0009] Preferably, the bus connector has openings at the top, bottom and side, the lower part of the first sleeve mates with the top opening of the bus connector, and the side opening of the bus connector mates with the bracket housing.

[0010] Preferably, the first sleeve has a columnar structure with a first sleeve protrusion in the middle, which is used to limit the upper part of the first sleeve in the inlet chamber or outlet chamber.

[0011] Preferably, the voltage transformer cable is provided with inner conical joints at both ends that mate with the second bushing, and the voltage transformer is provided with an opening at the top that mates with the inner conical joints. One end of the voltage transformer cable is connected to the second bushing through the inner conical joint, and the other end is connected to the voltage transformer through the inner conical joint.

[0012] Preferably, the inner conical joint is located in the inlet chamber, and has an opening at the bottom that mates with the cable joint. The cable joint has a columnar structure with a cable joint protrusion in the middle. The cable joint protrusion is used to limit the cable joint in the transformer chamber. The cable joint protrusions at both ends of the voltage transformer cable are respectively fixed to the bottom of the second bushing and the top of the voltage transformer by bolts.

[0013] Preferably, the first copper terminal includes a connecting portion located in the middle and a first fixing portion located on both sides, the second copper terminal includes a connecting portion located in the middle and a second fixing portion located at the bottom of the first sleeve, a conductor is disposed in the connecting portion, the connecting portion of the first copper terminal is embedded in the upper part of the first sleeve, and the connecting portion of the second copper terminal is embedded in the lower part of the first sleeve.

[0014] In summary, this application has the following beneficial effects:

[0015] 1. It saves space compared to existing technologies.

[0016] 2. Replacing conventional cable installations and conventional copper busbar / copper rod installations with top busbar connectors simplifies installation and reduces costs. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the metering cabinet of this application;

[0018] Figure 2 is a schematic diagram of the CT structure of this application;

[0019] Figure 3 is a schematic diagram of the PT structure of this application;

[0020] Figure 4 is a schematic diagram of the structure of the second sleeve of this application;

[0021] Figure 5 is a schematic diagram of the structure of the first copper terminal of this application;

[0022] Figure 6 is a schematic diagram of the structure of the second copper terminal of this application.

[0023] Figure descriptions: 1-First copper terminal; 2-First bushing; 3-First bushing protrusion; 4-Second copper terminal; 5-Bracket conductor; 6-Bus connector; 7-Bracket housing; 8-Current transformer; 9-Second bushing; 10-Inner conical joint; 11-Second bushing protrusion; 12-Voltage transformer cable; 13-Bolt; 14-Conductor; 15-Connecting part; 16-First fixing part; 17-Second fixing part; 30-Inlet chamber; 40-Outlet chamber. Detailed Implementation

[0024] The present application will be further described below with reference to the accompanying drawings. The structure and principle of the present application are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0025] Figure 1 is a schematic diagram of the metering cabinet of this application, Figure 2 is a schematic diagram of the CT structure of this application, Figure 3 is a schematic diagram of the PT structure of this application, Figure 4 is a schematic diagram of the second sleeve of this application, Figure 5 is a schematic diagram of the first copper terminal of this application, and Figure 6 is a schematic diagram of the second copper terminal of this application.

[0026] Referring to Figures 1 to 6, the metering cabinet of this application includes an inlet chamber 30, an outlet chamber 40, a metering chamber, and a transformer chamber. The transformer chamber houses a CT (current transformer) structure and a PT (voltage transformer) structure. The CT structure is horizontally positioned at the top of the transformer chamber and includes an insulated tee busbar connector 6. The upper opening of the busbar connector 6 connects to a C-type bushing 2, and a support is fitted inside. The end of the support is electrically connected to the C-type bushing 2. Two busbar connectors 6 are connected via the support, and a current transformer 8 is mounted on the support. Two C-type bushings 2 are respectively located in the inlet chamber 30 and the outlet chamber 40. The PT structure is vertically positioned to one side of the CT structure and includes a voltage transformer cable 12. One end of the voltage transformer cable 12 connects to an inner conical bushing 9, and the other end connects to the voltage transformer. The inner conical bushing 9 is located in the inlet chamber 30. The first bushing 2 is a C-type bushing, and the second bushing 9 is an inner conical bushing.

[0027] The top of the first sleeve 2 is provided with a first copper terminal 1, which is used to connect the busbar of the inlet chamber 30. The lower side of the first sleeve 2 is provided with a second copper terminal 4, which is connected to the end of the bracket conductor 5.

[0028] The bracket includes a bracket housing 7 and a bracket conductor 5 disposed within the bracket housing 7. The two ends of the bracket conductor 5 extend out from both sides of the bracket housing 7, and the ends of the bracket conductor 5 are electrically connected to the first sleeve 2. The bus connector 6 has openings at the top, bottom, and sides. The lower part of the first sleeve 2 mates with the top opening of the bus connector 6, and the side opening of the bus connector 6 mates with the bracket housing 7.

[0029] The first bushing 2 has a columnar structure with a first bushing protrusion 3 in the middle. The first bushing protrusion 3 is used to limit the upper part of the first bushing 2 in the inlet chamber 30 or the outlet chamber 40. The voltage transformer cable 12 has inner conical connectors 10 at both ends that mate with the second bushing 9. The top of the voltage transformer has an opening that mates with the inner conical connectors 10. One end of the voltage transformer cable 12 is connected to the second bushing 9 through the inner conical connectors 10, and the other end is connected to the voltage transformer through the inner conical connectors 10.

[0030] The inner cone joint 10 is installed in the inlet chamber 30, and has an opening at the bottom that mates with the cable joint. The cable joint is a columnar structure with a cable joint protrusion 11 in the middle. The cable joint protrusion 11 is used to limit the cable joint in the transformer chamber. The cable joint protrusions 11 at both ends of the voltage transformer cable 12 are fixed to the bottom of the second bushing 9 and the top of the voltage transformer by bolts 13, respectively.

[0031] The first copper terminal 1 includes a connecting part 15 located in the middle and a first fixing part 16 located on both sides. The second copper terminal 4 includes a connecting part 15 located in the middle and a second fixing part 17 located at the bottom of the first sleeve 2. A conductor 14 is provided inside the connecting part 15. The connecting part 15 of the first copper terminal 1 is embedded in the upper part of the first sleeve 2, and the connecting part 15 of the second copper terminal 4 is embedded in the lower part of the first sleeve 2.

[0032] The busbar of the incoming line compartment 30 is connected to the first bushing 2, and the cable of the incoming line compartment 30 is connected to the second bushing 9. The current flowing into the first bushing 2 passes through the first copper terminal 1, and is conducted through the conductor inside the first bushing 2 (not shown in the figure) to the second copper terminal 4 at the bottom of the first bushing 2. Then, it flows through the support conductor 5 to the busbar connector 6 on the right side of the figure, and finally flows to the first bushing 2 located in the outgoing line compartment 40. The current flowing into the second bushing 9 flows into the voltage transformer through the voltage transformer cable 12.

Claims

1. A metering cabinet, comprising an inlet compartment, an outlet compartment, a metering compartment, and a current transformer compartment, characterized in that, The transformer chamber contains: a CT structure, horizontally positioned at the top of the transformer chamber, including an insulated tee bus connector. The upper opening of the bus connector connects to the first bushing, and a bracket is fitted inside. The end of the bracket is electrically connected to the first bushing. Two bus connectors are connected through the bracket, and a current transformer is mounted on the bracket. Two first bushings are respectively located in the inlet and outlet chambers. A PT structure, vertically positioned on one side of the CT structure, includes a voltage transformer cable. One end of the voltage transformer cable connects to the second bushing, and the other end connects to the voltage transformer. The second bushing is located in the inlet chamber.

2. The metering cabinet according to claim 1, characterized in that, The support includes a support housing and a support conductor disposed within the support housing. The two ends of the support conductor extend out from both sides of the support housing, and the ends of the support conductor are electrically connected to the first sleeve.

3. The metering cabinet according to claim 2, characterized in that, The first sleeve is provided with a first copper terminal at the top, which is used to connect to the busbar of the inlet chamber. The first sleeve is provided with a second copper terminal on one side of the lower part, which is connected to the end of the support conductor.

4. The metering cabinet according to claim 1, characterized in that, The bus connector has openings at the top, bottom and sides. The lower part of the first sleeve mates with the top opening of the bus connector, and the side opening of the bus connector mates with the bracket housing.

5. The metering cabinet according to claim 1, characterized in that, The first sleeve is a columnar structure with a first sleeve protrusion in the middle. The first sleeve protrusion is used to limit the upper part of the first sleeve in the inlet chamber or outlet chamber.

6. The metering cabinet according to claim 1, characterized in that, The voltage transformer cable has inner conical connectors at both ends that mate with the second bushing, and the voltage transformer has an opening at the top that mates with the inner conical connectors. One end of the voltage transformer cable is connected to the second bushing through the inner conical connector, and the other end is connected to the voltage transformer through the inner conical connector.

7. The metering cabinet according to claim 6, characterized in that, The inner conical joint is located in the inlet chamber and has an opening at the bottom that mates with the cable joint. The cable joint has a columnar structure with a cable joint protrusion in the middle. The cable joint protrusion is used to limit the cable joint in the transformer chamber. The cable joint protrusions at both ends of the voltage transformer cable are fixed to the bottom of the second bushing and the top of the voltage transformer by bolts, respectively.

8. The metering cabinet according to claim 3, characterized in that, The first copper terminal includes a connecting part located in the middle and a first fixing part located on both sides. The second copper terminal includes a connecting part located in the middle and a second fixing part located at the bottom of the first sleeve. A conductor is provided inside the connecting part. The connecting part of the first copper terminal is embedded in the upper part of the first sleeve, and the connecting part of the second copper terminal is embedded in the lower part of the first sleeve.

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