An additional type of transformer cabinet

Abstract

The utility model relates to high -voltage electrical equipment technical field, concretely relates to an additional mutual inductor cabinet. Including the cabinet body and mutual inductor in the cabinet body in, the cabinet body is installed under high -voltage switch cabinet floor or crossbeam, the cabinet body top is not set up the baffle, the side plate of cabinet body is the asymmetric form of sticking to the building shape, the one end of cabinet body is connected with the bushing below the high -voltage switch cabinet cabinet bottom through the female row, and the other end is connected with the incoming and outgoing line conductor through the bushing, the female row is connected mutual inductor, the secondary cable routing groove is set up in the cabinet body, and the cable is introduced into the secondary cable room of high -voltage switch cabinet. The utility model saves high -voltage switch cabinet floor area, and the structure is compact, and the scheme is flexible, and the environmental adaptability is strong, and the implementation is simple, can effectively reduce the project investment.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage electrical equipment technology, specifically to an auxiliary transformer cabinet. Background Technology

[0002] A certain project's 35kV power distribution system uses conventional metal-clad, medium-voltage switchgear with a rated operating current of 4000A and a short-circuit current level of 40kA. In addition to standard circuit breakers, 18-winding current transformers on the secondary side, surge arresters, and high-voltage live-line indicator devices, the cabinet also requires a 4-winding three-phase voltage transformer and a 6-winding TPY-class current transformer on the secondary side. The 35kV switchgear in this project has high electrical parameters, numerous internal devices, and the required current and voltage transformers occupy a large space. Given the existing dimensions of the high-voltage switchgear, it is impossible to install all of these current and voltage transformers simultaneously within a single cabinet. The conventional approach is to use two switchgear cabinets to install these devices, resulting in a large total floor space.

[0003] Therefore, without exceeding the conventional design dimensions of existing switchgear or increasing the number of switchgear, it is necessary to design an additional transformer cabinet to reduce the floor space and project investment. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art and provide an additional transformer cabinet without increasing the floor space.

[0005] The technical solution adopted by this utility model to achieve the above objectives is as follows: An additional type of instrument transformer cabinet includes a cabinet body and an instrument transformer located in the cabinet body. The cabinet body is installed on the floor slab or beam below the high-voltage switchgear. No cover plate is installed on the top of the cabinet body. The side panels of the cabinet body are asymmetrical in shape to fit the building shape. One end of the cabinet body is connected to the bushing under the bottom of the high-voltage switchgear through a busbar, and the other end is connected to the incoming and outgoing conductors through a bushing. The instrument transformer is connected to the busbar. A secondary cable routing trough is provided in the cabinet body to introduce the cable into the secondary cable room of the high-voltage switchgear.

[0006] The sleeve is located on the side or above and below the cabinet, depending on the wiring requirements.

[0007] The surfaces of all the busbars are covered with heat-shrink sleeves.

[0008] The cabinet is welded to the floor slab or beam below the high-voltage switchgear and an inspection door is installed on its side. An electromagnetic lock is provided on the inspection door. The electromagnetic lock works in conjunction with the high-voltage live display device inside the high-voltage switchgear to prevent the cabinet door from being opened accidentally while energized.

[0009] An observation window is provided at a suitable position on the side panel or inspection door of the cabinet to facilitate observation of the status of the equipment inside the cabinet.

[0010] The transformer is a current transformer.

[0011] By adopting the above technical solution, the beneficial effects of this utility model are as follows: 1) This utility model saves the floor space occupied by high-voltage switchgear.

[0012] 2) This utility model has a compact structure, flexible design, strong environmental adaptability, and simple implementation.

[0013] 3) This utility model can effectively reduce project investment.

[0014] Please see the data comparison in Table 1 for details.

[0015] Table 1 Comparison of the effects of this utility model and existing devices Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation structure of the current transformer cabinet according to an embodiment of the present utility model.

[0017] Figure 2 for Figure 1 Left view of the medium current transformer cabinet.

[0018] Figure 3 for Figure 1 Right view of the medium current transformer cabinet.

[0019] Figure 4 for Figure 2 Right view of the medium current transformer cabinet.

[0020] In the diagram: 1 is the cabinet, 2 is the current transformer, 3 is the busbar, 4 is the bushing, 5 is the inspection door, 6 is the electromagnetic lock, 7 is the observation window, 8 is the secondary cable routing trough, 9 is the cabinet side panel, 10 is the high-voltage switchgear, 11 is the floor slab, 12 is the crossbeam, 13 is the foundation embedded part, and 14 is the incoming and outgoing conductor. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The accompanying drawings are incorporated in and form a part of this specification. It will be apparent to those skilled in the art that other drawings can be obtained from these drawings without any inventive effort.

[0022] Example

[0023] The additional transformer cabinet described in this embodiment is as follows: Figures 1-4The current transformer cabinet shown includes a cabinet body 1 and a current transformer 2 located in the cabinet body 1. The cabinet body 1 is welded to the foundation embedded part 13 on the floor slab 11 or beam 12 below the high voltage switchgear 10. No cover plate is set on the top of the cabinet body 1. The side plate 9 of the cabinet body is an asymmetrical form that fits the shape of the building. One end of the cabinet body 1 is connected to the bushing 4 under the bottom of the high voltage switchgear 10 through the busbar 3, and the other end is connected to the incoming and outgoing conductors 14 through the bushing 4. The current transformer 2 is connected to the busbar 3. The cabinet body 1 is provided with a secondary cable routing trough 8, and the cable is introduced into the secondary cable room of the high voltage switchgear 10.

[0024] The sleeve 4 is located on the side or above and below the cabinet 1, depending on the wiring requirements.

[0025] The surface of each busbar 3 is covered with a heat-shrink sleeve.

[0026] An inspection door 5 is installed on the side of the cabinet 1. An electromagnetic lock 6 is provided on the inspection door 5. The electromagnetic lock 6 is used in conjunction with the high voltage live display device in the high voltage switch cabinet 10 to prevent the cabinet door from being opened accidentally while energized.

[0027] An observation window is provided at a suitable position on the side panel 9 of the cabinet or the inspection door 5 to facilitate observation of the status of the equipment inside the cabinet.

[0028] Obviously, the above embodiments are merely one example of this utility model and are not intended to limit the implementation and scope of this utility model. Any technical solutions that are the same as or equivalent to the contents described in the claims of this utility model should be included within the protection scope of this utility model.

Claims

1. An additional type of current transformer cabinet, characterized in that, The system includes a cabinet and an instrument transformer located within the cabinet. The cabinet is installed on a floor slab or beam below the high-voltage switchgear. No cover plate is installed on the top of the cabinet. The side panels of the cabinet are asymmetrical in shape to fit the building's exterior. One end of the cabinet is connected to a bushing at the bottom of the high-voltage switchgear via a busbar, and the other end is connected to the incoming and outgoing conductors via a bushing. The instrument transformer is connected to the busbar. A secondary cable routing trough is installed inside the cabinet to introduce the cable into the secondary cable room of the high-voltage switchgear.

2. The additional type current transformer cabinet according to claim 1, characterized in that, The sleeve is located on the side or above and below the cabinet, depending on the wiring requirements.

3. The additional type current transformer cabinet according to claim 1, characterized in that, The surfaces of all the busbars are covered with heat-shrink sleeves.

4. The additional type current transformer cabinet according to claim 1, characterized in that, The cabinet is welded to the floor slab or beam below the high-voltage switchgear, and an inspection door is installed on the side. An electromagnetic lock is provided on the inspection door, and the electromagnetic lock is used in conjunction with the high-voltage live display device inside the high-voltage switchgear.

5. The additional type current transformer cabinet according to claim 4, characterized in that, An observation window shall be provided at a suitable location on the side panel or inspection door of the cabinet.

6. An additional type current transformer cabinet according to any one of claims 1 to 5, characterized in that, The transformer is a current transformer.

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