Cable shielding grounding wire current sampling mutual inductor installation support

Abstract

The utility model provides a cable shield ground wire current sampling mutual inductor installation support which comprises a base, a supporting plate body is arranged on the top of the base, and a mutual inductor is installed on one side of the supporting plate body through a junction box. The support is placed at the bottom of the inner side of the switch cabinet of the wind turbine generator set, the base is used for supporting the supporting plate body, the junction box and the mutual inductor, erecting of the mutual inductor can be completed, and compared with the mode that the mutual inductor is installed in the mode that holes are formed in the cabinet bottom and the two sides in the cabinet and fixed through fasteners or welded supports or the like, construction is easier; and the cabinet body is not damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of current monitoring, in particular to a cable shielding grounding wire current sampling transformer mounting bracket. Background Art

[0002] The submarine cable of an offshore wind turbine is usually grounded at the steel armor at the base tower mouth. The three-phase submarine cable is introduced into the switch cabinet separately. The shielding layer is led out to the ground before the submarine cable enters the T-shaped head. Some collector lines cause thermal breakdown at the joints of the submarine cable switch cabinet due to the current-carrying design of the grounding wire, construction technology, and circulating heat accumulation. As the operating years of the unit increase, the thermal breakdown of the submarine cable is obvious. The thermal breakdown of the submarine cable may cause the collector line to trip and the switch cabinet to be damaged. The repair period of the submarine cable is long, which seriously affects the equipment and personal safety, the power generation loss is serious, and the economic benefits of operation are significantly reduced.

[0003] In recent years, the heat and breakdown of the shielding layer grounding wire at the submarine cable and switch joint account for a large proportion of the causes of offshore wind power collection line failures. In view of the long time required for troubleshooting and handling of the submarine cable faults of the unit and the loss of power generation efficiency, it is necessary to install a current transformer in the original wind turbine switch cabinet to measure the grounding current of the shielding layer lead-out grounding wire in real time. The cabinet is made of iron plates and is relatively thick. In addition, the space inside the cabinet is narrow. It is difficult to install the transformer by fasteners or welding brackets through holes on the bottom of the cabinet and on both sides of the cabinet, and it will damage the original structure of the cabinet. Utility Model Content

[0004] The purpose of the utility model is to provide a cable shield grounding wire current sampling transformer mounting bracket, which can complete the installation of the transformer by supporting the support plate, junction box and transformer with the base. Compared with the installation of the transformer by opening holes on the bottom of the cabinet or on both sides of the cabinet, fixing with fasteners or welding brackets, the construction is easier and will not damage the cabinet. In order to achieve the above technical features, the purpose of the utility model is achieved as follows:

[0005] A cable shield grounding wire current sampling transformer mounting bracket is characterized by comprising a base, a support plate body is provided on the top of the base, and the transformer is mounted on one side of the support plate body through a junction box.

[0006] A strong magnet is installed at the bottom of the base.

[0007] The support plate is provided with a wiring outlet for the transformer sampling wiring to pass through, and a wire trough extending along the longitudinal direction is installed on the support plate opposite to the wiring outlet. The wire trough and the junction box are distributed on both sides of the support plate opposite to each other.

[0008] The utility model cable shield grounding wire current sampling transformer mounting bracket includes a base, a support plate body is provided on the top of the base, and the transformer is installed on one side of the support plate body through a junction box. By placing the bracket of the application at the bottom of the inner side of the wind turbine switch cabinet, and using the base to support the support plate body, the junction box and the transformer, the installation of the transformer can be completed. Compared with installing the transformer by opening holes on the bottom of the cabinet and both sides of the cabinet and fixing it with fasteners or welding brackets, the construction is easier and will not damage the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0010] Figure 1 A structural diagram of a cable shield grounding wire current sampling transformer mounting bracket installed with a transformer provided by an embodiment of the utility model;

[0011] Figure 2 A bottom view of a cable shield grounding wire current sampling transformer mounting bracket when installing a transformer provided by an embodiment of the utility model;

[0012] Figure 3 A schematic diagram of the connection structure between the support plate and the junction box provided in an embodiment of the utility model;

[0013] Figure 4 A schematic diagram of a cable shield grounding wire current sampling transformer mounting bracket in working state provided by an embodiment of the utility model;

[0014] In the figure: base 1, support plate 2, wiring outlet 2a, mutual inductor 3, junction box 4, strong magnet 5, wire trough 6, fastening bolt 7, shielded grounding wire 8, cable 9, cabinet bottom 10, T-joint 11. DETAILED DESCRIPTION

[0015] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0016] See attached Figure 1-4 In order to realize the above technical features, the purpose of the utility model is achieved as follows:

[0017] A cable shield grounding wire current sampling transformer mounting bracket, characterized in that it comprises a base 1, a support plate 2 is provided at the bottom of the base 1, and a transformer 3 is mounted on one side of the support plate 2 through a junction box 4. By placing the bracket of the present application at the bottom of the inner side of the wind turbine switch cabinet, and using the base 1 to support the support plate 2, the junction box 4 and the transformer 3, the installation of the transformer 3 can be completed. Compared with installing the transformer by opening holes at the bottom of the cabinet and on both sides of the cabinet and fixing it with fasteners or welding brackets, the construction is easier and will not damage the cabinet.

[0018] Furthermore, a strong magnet 5 is installed at the bottom of the base 1. Since the wind turbine switch cabinet is made of an iron plate, the base 1 is more stably installed in the iron wind turbine switch cabinet by utilizing the magnetic force between the strong magnet 5 and the bottom of the wind turbine switch cabinet.

[0019] Furthermore, the support plate body 2 is provided with a wiring outlet 2a for the sampling wiring of the mutual inductor 3 to pass through, and a wire trough 6 extending along the longitudinal direction is installed on the support plate body 2 directly opposite to the wiring outlet 2a, and the wire trough 6 and the junction box 4 are oppositely distributed on both sides of the support plate body 2. The sampling data line of the mutual inductor passes through the junction box 4 and the wiring outlet 2a and is placed in the wire trough 6, so that the data line is stored.

[0020] During operation, the cable 9 is connected to the switch cabinet from the switch cabinet T-type connector 11, and the shielding layer at the cable connector leads out the shielding grounding wire 8 and connects it to the grounding bar at the bottom of the switch cabinet, so that the original shielding grounding wire passes through the current transformer. At this time, the transformer 3 is fixed at the bottom of the switch cabinet, and the collected data is led out through the sampling wiring outlet of the current transformer, that is, the grounding current monitoring of the shielding layer leading out grounding wire is completed.

Claims

1. A cable shield grounding wire current sampling transformer mounting bracket, characterized in that: It comprises a base (1), a support plate (2) being provided on the top of the base (1), and a mutual inductor (3) being mounted on one side of the support plate (2) via a junction box (4).

2. A cable shielded grounding wire current sampling transformer mounting bracket according to claim 1, characterized in that: A strong magnet (5) is installed at the bottom of the base (1).

3. A cable shield grounding wire current sampling transformer mounting bracket according to claim 2, characterized in that: The support plate body (2) is provided with a wiring outlet (2a) for the mutual inductor (3) to pass through for sampling wiring, and a wire trough (6) extending in the longitudinal direction is installed on the support plate body (2) directly opposite to the wiring outlet (2a), and the wire trough (6) and the junction box (4) are arranged on both sides of the support plate body (2) opposite to each other.

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