Residual current transformer

Abstract

The utility model discloses a residual current transformer, which belongs to the technical field of current transformers and comprises a fixed mounting seat, two protruding sockets are arranged on the top surface of the fixed mounting seat in an extending manner, and mounting plates are movably sleeved on the outer walls of the two protruding sockets. A residual current transformer body is fixedly connected between the top surfaces of the two mounting plates; the two fixing assemblies each comprise an extending frame, two limiting rods, a movable frame and two protruding inserting rods. According to the residual current transformer, installation is completed through cooperation of the protruding insertion plate and the installation plate, the movable frames are ejected out through the ejection springs, the top face of the installation plate is fixed through the protruding insertion rods, and during disassembly, the installation plate can be taken down from the protruding insertion seats only by moving the movable frames on the two sides towards the two sides, so that installation and disassembly are more convenient and faster; and the situation that disassembly cannot be carried out due to corrosion is avoided, and actual use is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and more specifically, to a residual current transformer. Background Technology

[0002] The residual current transformer is the detection element of a residual current device (RCD). Its main function is to detect the residual current (ground fault current such as electric shock and leakage current) passing through the main circuit of the transformer core, and to transform the residual current in the primary circuit into the output voltage of the secondary circuit. The residual current transformer is one of the most critical components of an RCD.

[0003] When installing existing residual current transformers, they are usually fixed to the target location using two bolts on the left and right. However, when it is necessary to modify the wires that pass through them, the residual current transformer needs to be removed. The bolt fixing makes disassembly quite troublesome, especially when there is no operation for a long time. The bolts may rust, making disassembly difficult and detrimental to use. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a residual current transformer. The residual current transformer body is installed by the cooperation of a protruding insert plate and a mounting plate. A push-out spring pushes out the movable frame, and a protruding insert rod fixes the top surface of the mounting plate. During disassembly, simply moving the movable frames on both sides allows the mounting plate to be removed from the protruding socket. Installation and disassembly are more convenient, preventing corrosion that could prevent disassembly and facilitating practical use.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] A residual current transformer includes: a fixed mounting base, the top surface of which extends two protruding sockets, the outer walls of which are movably fitted with mounting plates, and the top surfaces of which are fixedly connected to a residual current transformer body; and two sets of fixing components, each set of fixing components including an extension frame, two limiting rods, a movable frame, and two protruding inserts, the extension frame extending from one side of the outer wall of the fixed mounting base, the two limiting rods extending from one side of the outer wall of the extension frame, the movable frame movably fitted between the outer walls of the two limiting rods, and the two protruding inserts extending from the top surface of the movable frame.

[0009] As a preferred embodiment of this utility model, two ejector springs are installed on one side of the outer wall of each of the two extension frames, and one end of each ejector spring is fixedly connected to one side of the outer wall of the corresponding movable frame.

[0010] As a preferred embodiment of this utility model, both of the extension frames are provided with deformable extension plates on their top surfaces, and the bottom surfaces of the deformable extension plates are provided with protruding hooks.

[0011] As a preferred embodiment of this utility model, one end of each of the four limiting rods is fixedly connected to a limiting circular plate, and the outer walls of the two protruding sockets are each provided with a supporting ring plate.

[0012] As a preferred embodiment of this utility model, the bottom surfaces of both extension frames are provided with sliding grooves, and the two sliding grooves are respectively slidably engaged with the corresponding movable frames.

[0013] As a preferred embodiment of this utility model, the bottom surface of the fixed mounting base is provided with four bolt holes, and the top surfaces of the two movable frames are provided with mating grooves, which respectively mate with the corresponding deformable extension plates.

[0014] 3. Beneficial Effects

[0015] Compared with the prior art, this utility model provides a residual current transformer, which has the following advantages:

[0016] The residual current transformer is installed by using a protruding insert plate and a mounting plate. A spring pushes out the movable frame, and a protruding insert rod fixes the top surface of the mounting plate. When disassembling, simply move the movable frames on both sides to the sides to remove the mounting plate from the protruding socket. Installation and disassembly are more convenient and will not cause corrosion that would prevent disassembly, thus facilitating practical use. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a rear-view perspective view of the present invention;

[0019] Figure 3 This is a partial perspective view of the present utility model.

[0020] Explanation of the labels in the diagram:

[0021] 1. Fixed mounting base; 2. Protruding socket; 3. Mounting plate; 4. Residual current transformer body; 5. Extension frame; 6. Limiting rod; 7. Movable frame; 8. Protruding insertion rod; 9. Deformable extension plate; 10. Ejection spring; 11. Slide groove; 12. Support ring plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely partial embodiments of the present utility model, not embodiments of all components. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-3 A residual current transformer includes: a fixed mounting base 1, with two protruding sockets 2 extending from the top surface of the fixed mounting base 1, and mounting plates 3 movably fitted onto the outer walls of the two protruding sockets 2, with a residual current transformer body 4 fixedly connected between the top surfaces of the two mounting plates 3; and two sets of fixing components, each set of fixing components including an extension frame 5, two limiting rods 6, a movable frame 7, and two protruding inserts 8. The extension frame 5 extends from one side of the outer wall of the fixed mounting base 1, the two limiting rods 6 extend from one side of the outer wall of the extension frame 5, the movable frame 7 is movably fitted between the outer walls of the two limiting rods 6, and the two protruding inserts 8 extend from the top surface of the movable frame 7.

[0024] In a specific embodiment of this utility model, by installing the fixed mounting base 1 and the fixed components located on both sides at the target position, when installing the residual current transformer body 4, the protruding insert plate 2 and the mounting plate 3 located at the bottom of the residual current transformer body 4 are aligned, so that the mounting port of the mounting plate 3 and the protruding insert plate 2 are aligned and pressed down into place. The mounting plate 3 and the support ring plate 12 are in contact and in place. Then, the ejector spring 10 pushes out the movable frame 7, and the two protruding insert rods 8 on the top surface of the movable frame 7 will fix the top surface of the mounting plate 3, thereby completing the installation of the residual current transformer body 4. When disassembling, simply move the movable frames 8 on both sides to the sides and move the protruding hooks into the mating grooves. After fixing, the mounting plate 3 can be removed from the protruding socket 2. Installation and disassembly are more convenient, and there will be no situation where rust will cause disassembly to be impossible, which is beneficial for actual use.

[0025] Please refer to the figure for details. Two ejector springs 10 are installed on one side of the outer wall of each of the two extension frames 5. One end of each ejector spring 10 is fixedly connected to one side of the outer wall of the corresponding movable frame 7.

[0026] In this embodiment, the movable frame 7 is pushed out by the push-out spring 10, so that the protruding insert rod 8 fixes the mounting plate 3.

[0027] Please refer to the figure for details. Both extension frames 5 have deformable extension plates 9 extending from their top surfaces, and the bottom surfaces of the deformable extension plates 9 have protruding hooks.

[0028] In this embodiment, a protruding hook is provided by the deformable extension plate 9, which ensures that the protruding hook can restrict the mating groove without affecting its normal movement.

[0029] Please refer to the figure for details. One end of each of the four limiting rods 6 is fixedly connected to a limiting circular plate, and the outer walls of the two protruding sockets 2 are each provided with a support ring plate 12.

[0030] In this embodiment, the movable frame 7 is prevented from falling off by restricting the circular plate, the support ring plate 12 supports the mounting base plate 3, and at the same time prompts the user whether the installation is in place.

[0031] Please refer to the figure for details. The bottom surfaces of the two extension frames 5 are provided with sliding grooves 11, and the two sliding grooves 11 are respectively slidably engaged with the corresponding movable frames 7.

[0032] In this embodiment, the sliding groove 11 and the movable frame 7 work together to prevent misalignment during movement.

[0033] Please refer to the figure for details. The bottom surface of the fixed mounting base 1 has four bolt holes, and the top surface of the two movable frames 7 is provided with mating grooves. The two mating grooves are respectively mated with the corresponding deformable extension plates 9.

[0034] In this embodiment, the threaded hole facilitates the user to install the fixed mounting base 1 at the target position, and the groove and deformable extension plate 9 achieve temporary fixation of the movable frame 7.

[0035] Working principle: By installing the fixed mounting base 1 and the fixed components on both sides at the target position, when installing the residual current transformer body 4, the protruding plug plate 2 and the mounting plate 3 located at the bottom of the residual current transformer body 4 are aligned, so that the mounting port of the mounting plate 3 and the protruding plug plate 2 are aligned and pressed down into place. The mounting plate 3 and the support ring plate 12 are in contact and in place. Then, the ejector spring 10 pushes out the movable frame 7. The two protruding plug rods 8 on the top surface of the movable frame 7 will fix the top surface of the mounting plate 3, thereby completing the installation of the residual current transformer body 4. When disassembling, simply move the movable frames 8 on both sides to the sides and move the protruding hooks into the mating grooves. After fixing, the mounting plate 3 can be removed from the protruding socket 2. The installation and disassembly are more convenient and will not cause rust that would prevent disassembly, which is beneficial for practical use.

[0036] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A residual current transformer, characterized in that, include: A fixed mounting base (1) has two protruding sockets (2) extending from its top surface. Each of the two protruding sockets (2) has a mounting plate (3) movably fitted onto its outer wall. A residual current transformer body (4) is fixedly connected between the top surfaces of the two mounting plates (3). Two sets of fixing components, each set of fixing components includes an extension frame (5), two limiting rods (6), a movable frame (7) and two protruding inserts (8). The extension frame (5) extends to one side of the outer wall of the fixed mounting base (1). The two limiting rods (6) extend to one side of the outer wall of the extension frame (5). The movable frame (7) is movably fitted between the outer walls of the two limiting rods (6). The two protruding inserts (8) extend to the top surface of the movable frame (7).

2. A residual current transformer according to claim 1, characterized in that: Two ejector springs (10) are installed on one side of the outer wall of each of the two extension frames (5), and one end of each ejector spring (10) is fixedly connected to one side of the outer wall of the corresponding movable frame (7).

3. A residual current transformer according to claim 2, characterized in that: Both of the extension frames (5) have a deformable extension plate (9) extending from their top surfaces, and the bottom surface of the deformable extension plate (9) has a protruding hook.

4. A residual current transformer according to claim 3, characterized in that: One end of each of the four limiting rods (6) is fixedly connected to a limiting circular plate, and the outer walls of the two protruding sockets (2) are provided with supporting ring plates (12).

5. A residual current transformer according to claim 4, characterized in that: The bottom surfaces of the two extension frames (5) are provided with sliding grooves (11), and the two sliding grooves (11) are respectively slidably engaged with the corresponding movable frame (7).

6. A residual current transformer according to claim 5, characterized in that: The bottom surface of the fixed mounting base (1) is provided with four bolt holes, and the top surface of the two movable frames (7) is provided with mating grooves. The two mating grooves respectively mate with the corresponding deformable extension plates (9).

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