Current transformer structure of centrally-mounted high-voltage switch cabinet

Abstract

The utility model relates to the field of switch cabinet equipment, and particularly discloses a middle-mounted current transformer structure of a high-voltage switch cabinet, which comprises an insulating baffle plate, an iron core and a secondary winding structure, the insulating baffle plate is provided with an interlayer, the iron core is fixedly arranged in the interlayer, the insulating baffle plate is also provided with a through hole, and the through hole penetrates through the middle position of the iron core; the secondary winding structure comprises an insulating shell, a connecting ring and a winding, the connecting ring is installed in the insulating shell, the winding is wound in the middle of the connecting ring, the two ends of the winding are provided with a positive pole connecting column and a negative pole connecting column respectively, and the two ends of the connecting ring are connected with the two ends of the iron core respectively. The iron core is arranged in the insulating baffle plate, and the secondary winding structure is arranged to be a detachable structure, so that the problem of integration of the current transformer and the insulating baffle plate can be solved, the secondary winding of the current transformer can be detached and replaced, and secondary winding structures with different numbers of turns can be used according to different lines.

Description

TECHNICAL FIELD

[0001] The utility model relates to a switchgear equipment field, concretely relates to a middle -mounted high -voltage switch cabinet current transformer structure. BACKGROUND

[0002] 550 cabinet is one of middle -mounted high -voltage switch cabinet, as " the late bloomer ", it is the representative product of small -sized high -voltage cabinet, because the width of cabinet body is 550 mm, so we call it 550 middle -mounted cabinet in the industry, this is a compact structure, environmental protection type, intelligent air insulation high -voltage switch cabinet, adopts the special load switch fuse combination electric appliance, is widely used in enterprise factory, school, hospital, residential area, substation etc. It not only perfectly inherits the characteristic of KYN28 cabinet, and in the insulation technology, temperature control, creepage distance aspect and breakthrough, promotion.

[0003] Because 550 middle -mounted cabinet belongs to small -sized high -voltage cabinet, its insulation medium is air insulation, and the cabinet body width is only 550 mm, and the inside interval is small, and the structure is compact, and the conductors are completely separated by the insulation partition plate, the upper portion of the primary outgoing line busbar of the traditional current transformer is separated by the partition plate, so as to prevent interphase creepage and ensure the reliability of interphase insulation, since the partition plate on the primary outgoing line end busbar of the transformer is added later, there is an air gap between the partition plate and the busbar, which will inevitably cause the generation of interphase creepage arc, directly affecting the insulation service life of the whole switch, if the current transformer and the insulation partition plate adopt an integrated structure, the air gap discharge problem can be eliminated, therefore, a high -voltage switch cabinet current transformer is required to meet the requirements of the current transformer and the insulation partition plate. UTILITY MODEL CONTENTS

[0004] The utility model is to solve the technical problem mentioned in the above background art, and the following technical scheme is proposed:

[0005] A middle -mounted high -voltage switch cabinet current transformer structure, including insulation baffle, iron core and secondary winding structure, the insulation baffle is provided with interlayer, the iron core is fixedly installed in the interlayer, the iron core is the rectangular structure of one end opening, the insulation baffle is also provided with through -hole, the through -hole passes through the middle position of the iron core, the secondary winding structure includes insulation shell, connecting ring and winding, the connecting ring is the half -round structure of one end opening, the connecting ring is installed in the insulation shell, the winding is wound in the middle of the connecting ring, the winding both ends are provided with positive pole connecting post and negative pole connecting post respectively, the connecting ring both ends are connected with the iron core both ends respectively.

[0006] Preferably, the insulation shell is installed on the insulation baffle and is inserted with the insulation baffle.

[0007] Preferably, the insulation baffle is provided with a plurality of iron core insertion slots, and the plurality of iron core insertion slots are respectively located directly above the two ends of the iron core.

[0008] Preferably, the positive electrode connecting column and the negative electrode connecting column are respectively fixed on the outer wall of the insulation shell.

[0009] Preferably, the insulation baffle is provided with a plurality of iron core insertion slots, and the plurality of iron core insertion slots are respectively located directly above the two ends of the iron core.

[0010] The utility model discloses the beneficial effect is:

[0011] 1. the current transformer is split into the iron core and secondary winding structure, and the iron core is installed in the insulation baffle, and the secondary winding structure is set up to the structure of dismounting, not only can solve the integration problem of current transformer and insulation baffle, but also can make the current transformer dismounting replacement secondary winding, can use different turns of secondary winding structure according to different line.

[0012] 2. the secondary winding structure is inserted with the insulation baffle, not only convenient to dismount overhauls, but also can be automatically positioned when installing, also facilitate staff to install.

[0013] 3. the iron core insertion slot is set up on the insulation baffle, can facilitate the installation of secondary winding structure, can also avoid the problem of misalignment or deviation of the connection ring and iron 2 connection. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the utility model;

[0015] Figure 2 It is the insulation baffle structure schematic diagram of the utility model;

[0016] Figure 3 It is the insulation shell structure schematic diagram of the utility model;

[0017] Figure 4 It is the insulation shell sectional view of the utility model.

[0018] In the drawing: 1, insulation baffle;1-1, interlayer;1-2, through hole;1-3, mounting sliding block;2, iron core;3, secondary winding structure;3-1, insulation shell;3-2, connecting ring;3-3, winding;4, positive electrode connecting column;5, negative electrode connecting column;6, iron core insertion slot. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0020] In the description of the present application, it should be understood that, in this document, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. The connection mode described by the terms "fixed connection" and "fixed setting" includes but is not limited to "welding", "riveting", "adhesion", "screw connection". The terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment

[0021] The terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0022] Embodiment one

[0023] With reference to Figures 1-4 A middle-mounted high-voltage switch cabinet current transformer structure, comprising an insulating baffle 1, a core 2 and a secondary winding structure 3, the insulating baffle 1 is provided with a sandwich layer 1-1, the core 2 is fixedly installed in the sandwich layer 1-1, the core 2 is a rectangular structure with one end open, and the insulating baffle 1 is further provided with a through hole 1-2, the through hole 1-2 passes through the middle position of the core 2, the wire harness can pass through the insulating baffle 1 through the through hole 1-2, and the wire harness after passing through the insulating baffle 1 is located in the middle of the core 2;

[0024] The secondary winding structure 3 comprises an insulating shell 3-1, a connecting ring 3-2 and a winding 3-3. The connecting ring 3-2 is a half-circular structure with one end open. The open end of the connecting ring 3-2 can be connected to the open end of the iron core 2 in a head-to-tail manner to form a closed circuit. The connecting ring 3-2 is installed in the insulating shell 3-1. The winding 3-3 is wound around the middle position of the connecting ring 3-2. When the connecting ring 3-2 and the iron core 2 form a closed circuit and there is a power transmission line passing through the middle of the iron core 2, an induced current will be generated on the winding 3-3. The positive and negative connecting posts 4 and 5 are respectively arranged at the two ends of the winding 3-3. The induced current can be measured by connecting a measuring device such as an ammeter to the positive and negative connecting posts 4 and 5.

[0025] Embodiment two

[0026] With reference to Figure 1 The insulating shell 3-1 is installed on the insulating baffle 1 and is inserted with the insulating baffle 1. By inserting and installing the insulating shell 3-1 on the insulating baffle 1, it is convenient for disassembly and maintenance, and automatic positioning can be achieved during installation, which is also convenient for workers to install.

[0027] Embodiment three

[0028] With reference to Figure 2 A plurality of iron core insertion slots 6 are arranged on the insulating baffle 1. The plurality of iron core insertion slots 6 are respectively located directly above the two ends of the iron core 2. The size and position of the connecting ring 3-2 correspond to those of the iron core insertion slot 6. The connecting ring 3-2 can pass through the iron core insertion slot 6 and be connected to the two ends of the iron core 2.

[0029] By arranging the iron core insertion slot 6 on the insulating baffle and passing the two ends of the connecting ring 3-2 through the iron core insertion slot 6 and connecting them to the two ends of the iron core, the installation of the secondary winding structure 3 is facilitated, and the problem of misalignment or deviation of the connection position of the connecting ring 3-2 and the iron core 2 can be avoided.

[0030] Embodiment four

[0031] With reference to Figure 3 The positive and negative connecting posts 4 and 5 are respectively fixed on the outer wall of the insulating shell 3-1, so that the positive and negative connecting posts 4 and 5 are more convenient to connect with a measuring device (such as an ammeter).

[0032] Embodiment five

[0033] With reference to Figure 1 The mounting sliding blocks 1-3 are arranged on the left and right sides of the insulating baffle 1. During the installation of the insulating baffle 1, the mounting sliding blocks 1-3 can be used for quick installation, thereby improving the installation efficiency.

Claims

1. A structure of a current transformer of a high voltage switchgear cubicle, comprising an insulating baffle (1), a core (2) and a secondary winding structure (3), characterized in that, The insulating baffle (1) is provided with a sandwich (1-1), the iron core (2) is fixedly installed in the sandwich (1-1), the iron core (2) is a rectangular structure with one end open, the insulating baffle (1) is further provided with a through hole (1-2), the through hole (1-2) passes through the middle position of the iron core (2), the secondary winding structure (3) comprises an insulating shell (3-1), a connecting ring (3-2) and a winding (3-3), the connecting ring (3-2) is a semicircular structure with one end open, the connecting ring (3-2) is installed in the insulating shell (3-1), the winding (3-3) is wound in the middle of the connecting ring (3-2), the winding is respectively provided with a positive pole connecting column (4) and a negative pole connecting column (5) at two ends, and the connecting ring (3-2) is respectively connected with two ends of the iron core (2).

2. A structure of current transformer for high voltage switchgear according to claim 1, characterized in that, The insulating shell (3-1) is installed on the insulating baffle (1) and is inserted with the insulating baffle (1).

3. A structure of current transformer for high voltage switchgear according to claim 1, characterized in that, A plurality of iron core insertion grooves (6) are arranged on the insulating baffle (1), a plurality of iron core insertion grooves (6) are respectively located directly above two ends of the iron core (2), the size and position of the connecting ring (3-2) correspond to the iron core insertion groove (6), and the connecting ring (3-2) can pass through the iron core insertion groove (6) and be connected with two ends of the iron core (2).

4. A structure of current transformer for high voltage switchgear according to claim 1, characterized in that, The positive pole connecting column (4) and the negative pole connecting column (5) are respectively fixed on the outer wall of the insulating shell (3-1).

5. A structure of current transformer for high voltage switchgear according to claim 1, characterized in that, The insulating baffle (1) is provided with installation sliding blocks (1-3) on the left and right sides.

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