Novel mutual inductor mounting structure

Abstract

The utility model relates to a novel mutual inductor installation structure, which comprises a cabinet body, a mutual inductor installation plate and a cable supporting beam, the cabinet body comprises a working wiring board and side plates arranged on two sides of the working wiring board, and a main circuit installation part and a zero line installation part are arranged on two sides of the working wiring board. The cable supporting beam is horizontally and obliquely installed in the middle of the working wiring board, the cable supporting beam deviates to a zero line installation part of the working wiring board, the mutual inductor installation plate is vertically installed on the cable supporting beam, and a mutual inductor is vertically installed on the mutual inductor installation plate. According to the utility model, the mutual inductor mounting plate is mounted on the cable mounting beam which is obliquely arranged, so that the bending radian space between the mutual inductor and the cable is increased, when the sectional area of the three-phase cable is too large, the cable is also easy to bend and pass through the zero-sequence mutual inductor, and the mutual inductor cannot be broken or fall off due to forced bending of the cable; therefore, wiring is more convenient and more beautiful, cable cost is lower, and space in the cabinet is saved.

Description

Technical Field

[0001] The utility model relates to the field of low - voltage power supply equipment, and particularly relates to a novel installation structure of an instrument transformer. Background Technique

[0002] The low - voltage drawer cabinet protects the circuit by means of closing, conducting, opening and other functions of the control switch inside the drawer unit, and also monitors, controls, adjusts, protects and processes information exchange for the operation of the primary system and equipment, so as to form a highly secure closed working circuit.

[0003] As Figure 1 shown, the zero - sequence current transformer mounting plate 1 is vertically arranged and connected to the side support beam 5 of the drawer cabinet through self - tapping screws, and the zero - sequence current transformer 2 is mounted on the zero - sequence current transformer mounting plate 1 through fastening bolts. The A, B, and C - phase cables of the user need to pass through the zero - sequence current transformer 2, and the cables need to be bent at 90° and then connected to the static plug - in part 3 of the main circuit of the drawer unit. The neutral line also needs to pass through the zero - sequence current transformer 2. After the cable is suspended for a section, it is then connected to the cable support beam 4 and then routed around the side support beam to the N row 6 for connection.

[0004] With the existing installation structure, if the cross - sectional area of the three - phase cables is too large, it is not easy to bend after passing through the zero - sequence current transformer. Secondly, due to excessive bending of the cables, the transformer may be subjected to the gravity or tension of the cables, resulting in the rupture or dropping of the transformer. When the neutral line passes through the transformer and then suspends a section of cable and is connected to the N row along the cable support beam and the side support beam, due to the long suspension of the cable, it causes cable waste, is not beautiful, and occupies too much space inside the cabinet. Content of the Utility Model

[0005] The purpose of the utility model is to solve the technical problem that when the cable outer diameter is too large, it is not easy to bend after passing through the instrument transformer mounted on the side support beam of the drawer cabinet in the existing technology, and provides a novel installation structure of an instrument transformer. By changing the position of the instrument transformer mounting plate, an inclination angle is formed between the instrument transformer and the main - circuit mounting part to which the cable is connected, so that the cable passes through the instrument transformer along the inclined cable support beam and is connected to the main - circuit mounting part, which improves the bending - arc space between the instrument transformer and the cable, and facilitates the bending connection of thicker cables. The main idea is:

[0006] A novel installation structure of an instrument transformer includes a cabinet body, an instrument transformer mounting plate, and a cable support beam. The cabinet body includes a working wiring board and side plates arranged on both sides of the working wiring board. The two sides of the working wiring board are provided with a main - circuit mounting part and a neutral - line mounting part. The cable support beam is horizontally inclined and installed at the middle position of the working wiring board, and the cable support beam is biased towards the neutral - line mounting part of the working wiring board. The instrument transformer mounting plate is vertically installed on the cable support beam, and an instrument transformer is vertically mounted on the instrument transformer mounting plate.

[0007] In this solution, the cable support beam is horizontally and obliquely installed at the middle position of the working wiring board, so that the mutual inductor mounting plate installed on the cable support beam is located in the middle part of the cabinet body, and the cable support beam is biased towards the zero-line installation part. The axis of the coil passing through the mutual inductor is arranged parallel to the cable support beam. Then, the extension line of the axis of the coil passing through the mutual inductor vertically installed on the mutual inductor mounting plate intersects with the main circuit installation part, enabling the cable to pass through the mutual inductor and reach the plug-in incoming line connection on the working wiring board along the cable support beam, increasing the bending radian space between the mutual inductor and the cable. Therefore, when the user installs a relatively thick cable, it is convenient to bend the cable through the mutual inductor and reach the plug-in incoming line connection on the working wiring board, and the cable routing layout is also more beautiful.

[0008] Preferably, an incoming line part is provided at the bottom of the cabinet body, and the incoming line part is provided with a plurality of incoming line holes for incoming lines. The cable enters the interior of the cabinet body through the incoming line holes provided at the bottom of the cabinet body, enabling the cable to be routed for incoming lines on the cable support beam from bottom to top, maintaining the neatness and beauty between the cabinet body and the cable.

[0009] Preferably, the main circuit installation part includes a plurality of main circuit static plugs, and the main circuit static plugs are evenly arranged in the vertical direction of the cabinet body.

[0010] Preferably, the mutual inductor mounting plate is a C-shaped sheet metal part structure. There are flanges on both sides of the mutual inductor mounting plate, and there are three rows of mounting holes at the bottom of the mutual inductor mounting plate. The structure of the mutual inductor mounting plate is simple, has strong rigidity, and is convenient for installation.

[0011] Preferably, the mounting holes include mutual inductor mounting holes and wiring mounting holes. The wiring mounting holes are respectively arranged on both sides of the mutual inductor mounting holes. The mutual inductor mounting holes are used for mounting the mutual inductor, and the flanges on both sides of the mutual inductor and the mutual inductor mounting plate form a cable channel.

[0012] Preferably, the mutual inductor is a zero-sequence mutual inductor. Using a zero-sequence mutual inductor can detect whether the cables passing through are balanced.

[0013] The second object of the present utility model is to solve the technical problems existing in the prior art that when the neutral line is connected to the N row, the cable will be suspended, resulting in unstable cable connection, and directly crossing the cabinet body for wiring will cause cable waste. Further, the side plate is provided with a side support beam, the side support beam is horizontally arranged on the inner wall of the side plate, the side support beam is connected to the cable support beam, and the side support beam, the cable support beam and the neutral line installation part of the working wiring board form a triangular cavity. The neutral line installation part is a vertically arranged N row plug board. After the three-phase cable of this solution passes through the mutual inductor, the neutral line cable bypasses the mutual inductor along the cable channel of the mutual inductor, and then the neutral line cable is stably connected by a tie strap along the contour of the triangular cavity. The neutral line cable winds from the cable channel to the cable support beam, reaches the head end of the side support beam through the cable support beam, and then is connected to the N row plug board along the side support beam for wiring. This makes the cable routing more reasonable and beautiful, occupies less space in the cabinet, and the neutral line cable is positioned and supported along the mutual inductor mounting plate, the cable support beam and the side support beam during wiring. The neutral line cable will not directly cross the cabinet body to be connected to the N row plug board, thus avoiding the suspension of the neutral line cable. The mutual inductor mounting plate arranged in the middle position also shortens the distance from the neutral line to the N row, thereby reducing the cable cost.

[0014] Preferably, the cabinet body further includes a cabinet door, the cabinet door is movably connected to the side plate through a hinge, the cabinet door is provided with a ventilation opening, and a protection structure for preventing dust from entering the interior of the cabinet body is arranged at the ventilation opening. The protection structure is connected to the cabinet door through a fastener. The protection structure includes a ventilation net and a net pressing plate, and the ventilation net is tightly pressed at the ventilation opening position of the cabinet door through the net pressing plate.

[0015] Preferably, it further includes a three-phase cable. The three-phase cable includes an A-phase cable, a B-phase cable, a C-phase cable and a neutral line cable. The three-phase cable enters the interior of the cabinet body through an inlet hole, the three-phase cable passes through the mutual inductor, the A-phase cable, the B-phase cable and the C-phase cable are connected to the main circuit installation part, and the neutral line cable is connected to the neutral line installation part.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By installing the mutual inductor mounting plate on the inclined cable mounting beam, the bending arc space between the mutual inductor and the cable is increased. When the cross-sectional area of the three-phase cable is too large, the cable can be easily bent through the zero-sequence mutual inductor, and the mutual inductor will not be broken or dropped due to forced bending of the cable; when the neutral line passes through the mutual inductor, the cable can be tied to the zero-sequence mutual inductor mounting plate again by a tie strap and connected to the N row along the side support beam. The neutral line routing of the structure of this application will not cause the phenomenon of cable suspension and will not be damaged by the self-destruction force of the cable, making the wiring more convenient and beautiful, the cable cost lower, and at the same time saving the space in the cabinet. Description of the Drawings

[0018] Figure 1 Structural schematic diagram of the prior art

[0019] Figure 2 Structural schematic diagram of the present utility model

[0020] Figure 3 Front view of the structure of the current transformer mounting plate of the present utility model

[0021] Figure 4 Side view of the structure of the current transformer mounting plate of the present utility model

[0022] Figure 5 Structural schematic diagram of the cabinet door of the present utility model

[0023] Reference numerals include: 1, cabinet body; 11, working wiring board; 12, side plate; 13, cabinet door; 2, current transformer mounting plate; 21, curled edge; 22, current transformer mounting hole; 23, wiring mounting hole; 24, cable channel; 3, cable support beam; 4, current transformer; 5, side support beam; 6, main circuit mounting part; 7, neutral wire mounting part; 8, incoming line part; 9, protection structure; 91, ventilation net; 92, net pressing plate Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the embodiments clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims

[0025] It should be noted that all actions of obtaining signals, information or data in this application are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and obtaining the authorization given by the owner of the corresponding device

[0026] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" are defined according to the contour of the corresponding component itself. The terms such as "first, second" used in the present disclosure are used to distinguish one element from another and do not have sequentiality and importance

[0027] Embodiment 1

[0028] Such as Figure 2As shown in the figure, a new type of current transformer installation structure provided in this embodiment includes a cabinet body 1, a current transformer mounting plate 2, and a cable support beam 3. The cabinet body 1 includes a working wiring board 11 and side plates 12 arranged on both sides of the working wiring board 11. Main circuit mounting parts 6 and neutral wire mounting parts 7 are arranged on both sides of the working wiring board 11. The cable support beam 3 is horizontally and obliquely installed at the middle position of the working wiring board 11, and the cable support beam 3 is biased towards the neutral wire mounting part 7 of the working wiring board 11. The current transformer mounting plate 2 is vertically installed on the cable support beam 3, and a current transformer 4 is vertically installed on the current transformer mounting plate 2.

[0029] In this embodiment, the cable support beam 3 is horizontally and obliquely installed at the middle position of the working wiring board 11, so that the current transformer mounting plate 2 installed on the cable support beam 3 is located in the middle part of the cabinet body 1, and the cable support beam 3 is biased towards the neutral wire mounting part 7. The axis of the coil passing through the current transformer 4 is arranged parallel to the cable support beam 3. Then, the extension line of the axis of the coil passing through the current transformer 4 vertically installed on the current transformer mounting plate 2 intersects with the main circuit mounting part 6, so that the cable can pass through the current transformer 4 along the cable support beam 3 and be connected to the main circuit mounting part 6, increasing the bending arc space between the current transformer and the cable. Therefore, when the user passes a relatively thick cable, it is convenient to bend it through the current transformer and reach the plug-in wire connection on the working wiring board, and the cable routing layout is also more beautiful.

[0030] The current transformer mounting plate 2 of this embodiment is arranged on the side of the cable support beam 3 close to the working wiring board 11, so that the distance between the cable passing through the current transformer 4 and the main circuit mounting part 6 is closer. In order to form an optimal bending arc space between the current transformer and the cable, the included angle between the cable support beam 3 and the working wiring board 11 is set to 40° - 50°.

[0031] An inlet part 8 is provided at the bottom of the cabinet body 1, and the inlet part is provided with a plurality of inlet holes for incoming wires. The cable enters the interior of the cabinet body through the inlet holes provided at the bottom of the cabinet body, so that the cable is routed from bottom to top on the cable support beam 3, maintaining the neatness and beauty between the cabinet body and the cable.

[0032] The main circuit mounting part 6 includes a plurality of main circuit static plugs, and the main circuit static plugs are evenly arranged in the vertical direction of the cabinet body 1. The main circuit static plug is composed of three wiring sockets, and the three wiring sockets are used to connect the A-phase cable, the B-phase cable, and the C-phase cable.

[0033] Embodiment 2:

[0034] As Figures 3 - 4 shown in the figure, the current transformer mounting plate 2 of this embodiment is a C-shaped sheet metal part structure. Flanges 21 are provided on both sides of the current transformer mounting plate 2, and three rows of mounting holes are provided at the bottom of the current transformer mounting plate. The structure of the current transformer mounting plate is simple, has strong rigidity, and is convenient for installation.

[0035] The mounting holes include a current transformer mounting hole 22 and a wiring mounting hole 23. The wiring mounting holes 23 are respectively arranged on both sides of the current transformer mounting hole 22. The current transformer mounting hole 22 is used to mount the current transformer 4. The two sides of the current transformer 4 and the curled edge 21 of the current transformer mounting plate 2 form a cable channel 24.

[0036] During the use of the switch cabinet, the cable channel 24 on the side of the current transformer 4 close to the working wiring board 11 is set as the internal wiring channel. The neutral cable passing through the coil of the current transformer 4 is routed upward or downward along the internal wiring channel. The neutral cable is positioned and connected to the wiring mounting hole of the internal cable channel through a cable tie. When the neutral cable reaches the cable mounting beam 3 after avoiding the current transformer along the internal cable channel, the neutral cable is routed along the cable mounting beam again.

[0037] The current transformer 4 is a zero-sequence current transformer. Using a zero-sequence current transformer can detect whether the cables passing through are balanced.

[0038] Embodiment 3:

[0039] In this embodiment, the side plate 12 is provided with a side support beam 5. The side support beam 5 is horizontally arranged on the inner wall of the side plate 12. The side support beam 5 is connected to the cable support beam 3. The side support beam 5, the cable support beam 3 and the neutral wire mounting part 7 of the working wiring board 11 form a triangular cavity. The neutral wire mounting part 7 is a vertically arranged N-row socket plate. After the three-phase cables of this solution pass through the current transformer 4, the neutral cable avoids the current transformer along the cable channel of the current transformer 4, and then the neutral cable is stably connected through a cable tie along the contour of the triangular cavity. The neutral cable winds from the cable channel to the cable support beam 3, reaches the first end of the side support beam 5 through the cable support beam 3, and then is connected to the N-row socket plate along the side support beam 5 for wiring. This makes the cable routing more reasonable and beautiful, occupies less space inside the cabinet, and the neutral cable is positioned and supported along the current transformer mounting plate 2, the cable support beam 3 and the side support beam 5 during wiring. The neutral cable does not directly span the cabinet body to be connected to the N-row socket plate, thus avoiding the neutral cable from hanging in the air. The current transformer mounting plate 2 arranged in the middle position also shortens the distance from the neutral wire to the N row, thereby reducing the cable cost.

[0040] As Figure 5 shown, the cabinet body 1 of this embodiment further includes a cabinet door 13. The cabinet door 13 is movably connected to the side plate 12 through a hinge. The cabinet door 13 is provided with a ventilation opening. A protection structure 9 for preventing dust from entering the interior of the cabinet is arranged at the ventilation opening. The protection structure 9 is connected to the cabinet door 13 through a fastener. The protection structure 9 includes a ventilation netting 91 and a net pressing plate 92. The ventilation netting 91 is tightly pressed at the ventilation opening position of the cabinet door 13 through the net pressing plate 92.

[0041] Embodiment 4:

[0042] The three-phase cable of this embodiment includes an A-phase cable, a B-phase cable, a C-phase cable, and a neutral cable. The three-phase cable enters the interior of the cabinet 1 through the inlet hole. The three-phase cable passes through the mutual inductor 4. The A-phase cable, B-phase cable, and C-phase cable are connected to the main circuit installation part 6, and the neutral cable is connected to the neutral installation part 7.

[0043] The above are only the embodiments of the present invention. Common knowledge such as the specific structures and characteristics known in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A new type of mutual inductor installation structure, characterized in that: It includes a cabinet body (1), a current transformer mounting plate (2), and a cable support beam (3). The cabinet body (1) includes a working wiring board (11) and side plates (12) arranged on both sides of the working wiring board (11). Main circuit mounting parts (6) and neutral wire mounting parts (7) are arranged on both sides of the working wiring board (11). The cable support beam (3) is horizontally and obliquely installed at the middle position of the working wiring board (11), and the cable support beam (3) is biased towards the neutral wire mounting part (7) of the working wiring board (11). The current transformer mounting plate (2) is vertically installed on the cable support beam (3), and a current transformer (4) is vertically installed on the current transformer mounting plate (2).

2. The novel current transformer installation structure according to claim 1, characterized in that: An inlet part (8) is provided at the bottom of the cabinet body (1), and the inlet part is provided with a plurality of inlet holes for incoming wires.

3. A novel current transformer installation structure according to claim 1, characterized in that: The main circuit mounting part (6) includes a plurality of main circuit static plug-ins, and the main circuit static plug-ins are evenly arranged in the vertical direction of the cabinet body (1).

4. A novel current transformer installation structure according to claim 1, characterized in that The current transformer mounting plate (2) is of a C-shaped sheet metal structure. Curls (21) are provided on both sides of the current transformer mounting plate (2), and three rows of mounting holes are provided at the bottom of the current transformer mounting plate (2).

5. A novel current transformer installation structure according to claim 4, characterized in that: The mounting holes include current transformer mounting holes (22) and wiring mounting holes (23). Wiring mounting holes (23) are respectively arranged on both sides of the current transformer mounting holes (22). The current transformer mounting holes (22) are used to mount the current transformer (4). Cable channels (24) are formed between both sides of the current transformer (4) and the curls (21) of the current transformer mounting plate (2).

6. A novel current transformer installation structure according to claim 5, characterized in that: The current transformer (4) is a zero-sequence current transformer.

7. A novel current transformer installation structure according to claim 1, characterized in that: Side support beams (5) are provided on the side plates (12). The side support beams (5) are horizontally arranged on the inner walls of the side plates (12). The side support beams (5) are connected to the cable support beam (3). A triangular cavity is formed by the side support beams (5), the cable support beam (3), and the neutral wire mounting part (7) of the working wiring board (11). The neutral wire mounting part (7) is a vertically arranged N-row socket board.

8. A novel installation structure of an instrument transformer according to claim 1, characterized in that: The cabinet body (1) further includes a cabinet door (13). The cabinet door (13) is movably connected to the side plate (12) through a hinge. A ventilation opening is provided on the cabinet door (13), and a protection structure (9) for preventing dust from entering the interior of the cabinet body is provided at the ventilation opening. The protection structure (9) is connected to the cabinet door (13) through a fastener. The protection structure (9) includes a ventilation net (91) and a net pressing plate (92). The ventilation net (91) is tightly pressed at the ventilation opening position of the cabinet door (13) through the net pressing plate (92).

9. A novel current transformer installation structure according to any one of claims 1-8, characterized in that: It further includes a three-phase cable. The three-phase cable includes an A-phase cable, a B-phase cable, a C-phase cable, and a neutral wire cable. The three-phase cable enters the interior of the cabinet body (1) through the inlet holes. The three-phase cable passes through the current transformer (4). The A-phase cable, the B-phase cable, and the C-phase cable are connected to the main circuit mounting part, and the neutral wire cable is connected to the neutral wire mounting part.

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