Current transformer

Abstract

The utility model relates to the technical field of current transformers, in particular to a current transformer which comprises a main body and a mounting plate. A mounting plate is arranged below the main body, a clamping mechanism is arranged below the mounting plate, one side of the mounting plate is connected with a locking bolt, the locking bolt and the clamping mechanism are respectively matched with the guide rail, a fixed clamp and a movable clamp are arranged in the clamping mechanism, and clamping parts are correspondingly arranged below the fixed clamp and the movable clamp; the locking bolt abuts against the middle portion of the guide rail, and under the action of the locking bolt, the clamping part is tightly matched with the edges of the upper side and the lower side of the guide rail. In the using process of the current transformer, the mode that a traditional current transformer can be installed and fixed only by reversely installing a guide rail is avoided, installation is more convenient, meanwhile, other electrical elements can be installed on the guide rail for installing the current transformer, in addition, position adjustment can be conducted before the current transformer is completely installed and fixed, and installation is more convenient. And the installation and the use are more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a current transformer. Background Art

[0002] The current transformer consists of a closed iron core and a winding. It is an instrument that converts a large primary current into a small secondary current for measurement based on the principle of electromagnetic induction. Current transformers are widely used in power systems and are commonly found in distribution cabinets. They are mainly used to expand the range of single-phase meters, measure single-phase line currents, measure three-phase currents in three-phase balanced lines or three-phase unbalanced lines, and sample reactive power controller currents. They play an important role in the safe operation of power systems.

[0003] When the current transformer is used in the distribution cabinet, it is mainly installed through the guide rail. The guide rail is a standard part commonly used in the existing distribution cabinet, such as the 35mm standard guide rail. However, for the guide rail, it is installed with the electrical components of the distribution cabinet in a snap-on manner. After the snap-on is completed, the electrical components can slide on the guide rail, which is not applicable to the current transformer. For the current transformer, its installation must be firm. This is because the secondary side of the current transformer cannot be open-circuited and must be grounded. Firm installation is the guarantee of safe use. Therefore, in actual engineering, the guide rail is often reversed, so that the current transformer is fixed to the guide rail by bolts. This leads to, on the one hand, limited space in the distribution cabinet, often inconvenient installation and inconvenient fine-tuning of the installation position during the installation process. On the other hand, the reversed guide rail is no longer suitable for other electrical components, so it is necessary to set up another guide rail, which brings inconvenience to the installation of electrical components in the distribution cabinet.

[0004] Therefore, a current transformer that is easier to install during use is an issue that needs to be urgently addressed. Utility Model Content

[0005] The purpose of the utility model is to provide a current transformer in view of the above-mentioned deficiencies in the prior art, so as to achieve convenient and stable installation on the guide rail without the need for reverse installation of the guide rail, thereby bringing convenience to installation and use.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a current transformer, including a main body, a mounting plate is arranged below the main body, a clamping mechanism is arranged below the mounting plate, the clamping mechanism is slidably engaged with a guide rail, a locking bolt is connected to one side of the mounting plate, and the front end of the locking bolt abuts against the guide rail.

[0007] Furthermore, the clamping mechanism includes a fixed card and a movable card, and a clamping portion is correspondingly arranged below the fixed card and the movable card, and the clamping portion cooperates with the edge of the guide rail.

[0008] Furthermore, the movable card is slidably connected to the bottom of the mounting plate, a slide groove is provided in the mounting plate, a slider is slidably installed in the slide groove, the movable card is connected to the slider, and a spring is provided between the slider and the slide groove in a direction away from the fixed card.

[0009] Furthermore, a slide rod is arranged in the slide groove, the slider is slidably arranged on the slide rod, and the spring is sleeved on the slide rod.

[0010] Furthermore, the slide groove and the slider are in a matching square shape.

[0011] Furthermore, a locking plate is provided on one side of the mounting plate, and the locking bolt is connected to the locking plate.

[0012] Beneficial effects of the utility model:

[0013] 1. Under the condition that the guide rail does not need to be reversed, on the one hand, the current transformer of the utility model can be quickly installed with the guide rail, and on the other hand, before the current transformer is completely installed and fixed, it can slide on the guide rail, which is convenient for position adjustment during actual operation, bringing convenience to the line installation and layout operation in the distribution cabinet;

[0014] 2. The traditional installation and fixing method of reverse installation of the guide rail is avoided, so that the guide rail for installing the current transformer of the utility model can still be installed with other electrical components, saving raw materials and space, and also bringing convenience to actual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a main schematic diagram of the utility model;

[0016] Figure 2 It is a right side schematic diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the clamping mechanism of the utility model;

[0018] Figure 4 This utility model Figure 3 A partial enlarged schematic diagram of part A;

[0019] Figure 5 It is a schematic cross-sectional view of the chute of the utility model (front view);

[0020] Figure 6 It is a schematic diagram of the installation of the current transformer and the guide rail of the utility model.

[0021] The names corresponding to the marks in the figure are:

[0022] 1. Main body; 2. Mounting plate; 3. Clamping mechanism; 31. Fixed card; 32. Movable card; 33. Clamping part; 34. Slide groove; 35. Slide rod; 36. Slider; 37. Spring; 4. Locking plate; 5. Locking bolt; 6. Guide rail. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0024] Embodiments of the present utility model:

[0025] In this embodiment, a mounting plate 2 is provided below the main body 1 of the current transformer, a clamping mechanism 3 is provided below the mounting plate 2, the clamping mechanism 3 cooperates with the guide rail 6, and a locking plate 4 is provided on one side of the mounting plate 2, a locking bolt 5 is threadedly connected through the locking plate 4, and the front end of the locking bolt 5 can be tightened on the guide rail 6.

[0026] A fixed card 31 and a movable card 32 are provided in the clamping mechanism 3 , wherein a clamping portion 33 is correspondingly provided on the fixed card 31 and the movable card 32 , and the clamping portion 33 matches with the edge of the guide rail 6 .

[0027] A slide groove 34 is provided in the mounting plate 2 at the movable card 32, a slide rod 35 is provided in the slide groove 34, a slider 36 is slidably provided on the slider 35, the slider 36 is connected to the movable card 32, and a spring 37 is provided between the slider 36 at the end away from the fixed card 31 and the slide groove 34, the spring 37 is sleeved on the slider 35, wherein the slide groove 34 and the slider 36 are in a matching square shape.

[0028] The principle of this utility model is:

[0029] When the utility model is used, the guide rail 6 does not need to be reversed. During the process, the guide rail 6 is normally installed in the power distribution cabinet. At this time, the current transformer is placed flat, as shown in the attached embodiment. Figure 6 As shown, firstly, the movable card 32 is matched with the lower edge of the guide rail 6, and the current transformer is lifted up with force to pull the movable card 32 open. At this time, the upper part of the current transformer is slightly tilted outward, and then the current transformer is put straight (one side of the fixed card 31 is pressed inward), so that the fixed card 31 moves to the inner side of the upper edge of the guide rail 6, and the force is stopped. Under the action of the spring 37, the movable card 32 moves up, and then the fixed card 31 can be used to stably connect the current transformer to the guide rail 6.

[0030] After the current transformer is installed, the line can be connected. During the process, the large current on the primary side enters from the P1 terminal and exits from the P2 terminal. The S1 terminal and the S2 terminal are the secondary current output terminals. The current flows into the measuring instrument from the S1 terminal and then flows out from the S2 terminal, and the S2 terminal is grounded. The above process is the conventional setting method of the existing current transformer, which is the existing technology and will not be repeated here.

[0031] For the utility model, during the above-mentioned circuit connection process, the current transformer can slide on the guide rail 6, so as to facilitate the adjustment of the position of the current transformer and the arrangement of the lines in the distribution cabinet. After the arrangement is completed, the locking bolt 5 is tightened, so that the front end of the locking bolt 5 contacts and presses against the guide rail 6. At this time, the clamping portion 33 presses against the inner sides of the upper and lower edges of the guide rail 6, so that the current transformer is stably fixed on the guide rail 6, effectively ensuring the safety of use.

Claims

1. A current transformer, comprising a main body (1), characterized in that: A mounting plate (2) is arranged below the main body (1), a clamping mechanism (3) is arranged below the mounting plate (2), the clamping mechanism (3) is slidably engaged with the guide rail (6), a locking bolt (5) is connected to one side of the mounting plate (2), the front end of the locking bolt (5) is in contact with the guide rail (6); the clamping mechanism (3) comprises a fixed card (31) and a movable card (32), a clamping portion (33) is arranged correspondingly below the fixed card (31) and the movable card (32), the clamping portion (33) cooperates with the edge of the guide rail (6); the movable card (32) is slidably engaged with the bottom of the mounting plate (2), and is engaged with the guide rail (6) at the bottom of the mounting plate (2). A slide groove (34) is provided in the mounting plate (2), a slider (36) is slidably installed in the slide groove (34), the movable card (32) is connected to the slider (36), and a spring (37) is provided between the slider (36) and the slide groove (34) in a direction away from the fixed card (31); a slide rod (35) is provided in the slide groove (34), the slider (36) is slidably installed on the slide rod (35), and the spring (37) is sleeved on the slide rod (35); the slide groove (34) and the slider (36) are in a matching square shape; a locking plate (4) is provided on one side of the mounting plate (2), and a locking bolt (5) is connected to the locking plate (4).

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