A combined current transformer

Abstract

The present invention discloses a combined current transformer, comprising a base, a current conductor, and a transformer assembly detachably arranged on the base, wherein the transformer assembly is hollow and has a through hole, the current conductor is inserted into the through hole, and the transformer assembly is provided with a locking member for forming a notch on one side of the transformer assembly. The entire disassembly and installation process of the present invention is quick and convenient, and one of the transformers that is damaged individually can be replaced individually without having to replace the entire transformer, and the present invention is small in size and has high reliability.

Description

Technical Field

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

[0002] A current transformer is an electrical device that converts a larger primary current into a smaller secondary current through a certain transformation ratio based on the principle of electromagnetic induction for protection or measurement purposes. Currently, there is a combined current transformer on the market, which consists of two integrally connected current transformers and can be used to detect currents in a variety of circuits. However, since the combined current transformer is an integrated device, when one of the transformers fails, it needs to be replaced as a whole, which easily leads to a waste of resources. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art solutions, the present invention provides a combined current transformer.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A combined current transformer comprises a base, a current conductor and a transformer assembly detachably arranged on the base, wherein the transformer assembly is hollow and has a through hole, the current conductor is inserted into the through hole, and the transformer assembly is provided with a locking piece for forming a notch on one side of the transformer assembly.

[0006] As a preferred technical solution of the present invention, the locking member includes a rotating member and a movable member, the movable member is rotatably connected to the rotating member, and a driving member is provided at one end of the movable member.

[0007] As a preferred technical solution of the present invention, a cavity in which a movable part can be embedded is provided on one side of the mutual inductor assembly.

[0008] As a preferred technical solution of the present invention, a concave cavity is arranged above the base, and locking pieces are arranged at both ends of the concave cavity; buttons are arranged at both ends of the transformer assembly corresponding to the position of the locking piece; the buttons of the transformer assembly are buckled and connected with the locking piece of the base so that the transformer assembly and the base are assembled into one.

[0009] As a preferred technical solution of the present invention, the transformer assembly includes a current detection transformer and a leakage detection transformer respectively; the current conductor includes a first conductor and a second conductor respectively; the first conductor passes through the current detection transformer and is connected to the base, and the second conductor passes through the current detection transformer and the leakage detection transformer and is connected to the base.

[0010] As a preferred technical solution of the present invention, a pin is provided at one end of the base away from the cavity.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The entire disassembly and installation process of the present invention is quick and convenient, and a single damaged mutual inductor can be replaced separately without the need for overall replacement. In addition, the present invention has a small size and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 yes Figure 1 Left view of .

[0015] Figure 3 yes Figure 1 Right view of .

[0016] Figure 4 yes Figure 1 Lower side view.

[0017] Numbers in the figure: 1-base, 2-current wire, 21-first wire, 22-second wire, 3-transformer assembly, 31-current detection transformer, 32-leakage detection transformer, 4-through hole, 5-locking part, 51-rotating part, 52-movable part, 53-driving part, 54-notch, 6-concave cavity, 7-locking part, 8-button, 9-pin. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] A combined current transformer, according to Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, it includes a base 1, a current conductor 2, and a transformer assembly 3 detachably arranged on the base 1, wherein a concave cavity 6 is arranged above the base 1, and locking parts 7 are arranged at both ends of the concave cavity 6; buttons 8 are arranged at both ends of the transformer assembly 3 corresponding to the position of the locking parts 7; the buttons 8 of the transformer assembly 3 are buckled and connected with the locking parts 7 of the base 1 so that the transformer assembly 3 and the base 1 are assembled into one. When disassembling the transformer assembly 3, the transformer assembly 3 is pulled out with force until the button 8 is completely separated from the locking parts 7, so that the base 1 and the transformer assembly 3 are separated; when reinstalling the transformer assembly 3, the bottom of the transformer assembly 3 is pressed hard against the concave cavity 6 on the base 1 until the button 8 is completely buckled into the locking parts 7, so that the transformer assembly 3 is completely fixed on the base 1.

[0020] The transformer assembly 3 is hollow and has a through hole 4, and the current conductor 2 is inserted into the through hole 4. The transformer assembly 3 is provided with a locking member 5 that forms a notch 54 on one side of the transformer assembly 3. The locking member 5 includes a rotating member 51 and a movable member 52, and the movable member 52 is rotatably connected to the rotating member 51. A driving member 53 is provided at one end of the movable member 52. The movable member 52 can rotate around the rotating member 51. A cavity in which the movable member 52 can be embedded is provided on one side of the transformer assembly 3. When the driving member 53 is pressed toward the direction of the cavity, the driving member 53 synchronously drives the movable member 52 to rotate around the rotating member 51, and the movable member 52 is completely embedded in the cavity, so that a notch 54 is formed on one side of the transformer assembly 3. The outer diameter of the notch 54 is larger than the diameter of the current conductor 2; through the notch 54, the current conductor 2 passing through the transformer assembly 3 can be separated from the transformer assembly 3, so that the transformer assembly 3 can be completely disassembled and replaced.

[0021] The transformer assembly 3 includes a current detection transformer 31 and a leakage detection transformer 32; they can be used to detect current size and leakage current at the same time; the current conductor 2 includes a first conductor 21 and a second conductor 22; the first conductor 21 passes through the current detection transformer 31 and is connected to the base 1, and the second conductor 22 passes through the current detection transformer 31 and the leakage detection transformer 32 and is connected to the base 1.

[0022] A pin 9 is disposed at one end of the base 1 away from the cavity 6 .

[0023] An implementation process of the present invention is as follows: when disassembling the transformer assembly 3, the transformer assembly 3 is pulled out with force until the button 8 is completely separated from the lock member 7, so that the base 1 and the transformer assembly 3 are separated, and then the driving member 53 is pressed toward the direction of the cavity, and the driving member 53 synchronously drives the movable member 52 to rotate around the rotating member 51, and the movable member 52 is completely embedded in the cavity, so that a notch 54 is formed on one side of the transformer assembly 3, and the current wire 2 passing through the transformer assembly 3 can be separated from the transformer assembly 3 through the notch 54, so that the transformer assembly 3 can be completely disassembled;

[0024] When installing the transformer assembly 3, the current conductor 2 can be inserted into the through hole 4 of the transformer assembly 3 through the notch 54, and the bottom of the transformer assembly 3 is pressed hard against the cavity 6 on the base 1 until the buckle 8 is completely buckled into the locking piece 7, so that the transformer assembly 3 is completely fixed on the base 1.

[0025] The entire disassembly and installation process is quick and convenient; a single damaged mutual inductor can be replaced separately without replacing the entire mutual inductor; and the present invention has a small size and high reliability.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A combined current transformer, characterized in that: The invention comprises a base, a current conductor and a mutual inductor assembly detachably arranged on the base, wherein the mutual inductor assembly is hollow and has a through hole, the current conductor is inserted into the through hole, the mutual inductor assembly is provided with a locking member for forming a notch on one side of the mutual inductor assembly, the locking member comprises a rotating member and a movable member, the movable member is rotatably connected with the rotating member, a driving member is arranged at one end of the movable member, a cavity in which the movable member can be embedded is arranged on one side of the mutual inductor assembly, a concave cavity is arranged on the base, and two ends of the concave cavity are arranged Locking piece; buttons are provided at both ends of the transformer assembly corresponding to the locking piece position; the buttons of the transformer assembly are buckled and connected with the locking piece of the base so that the transformer assembly and the base are assembled into one, and the transformer assembly respectively comprises a current detection transformer and a leakage detection transformer; the current wires respectively comprise a first wire and a second wire; the first wire passes through the current detection transformer and is connected to the base, and the second wire passes through the current detection transformer and the leakage detection transformer and is connected to the base, and a pin is provided at one end of the base away from the concave cavity; When disassembling the transformer assembly, pull out the transformer assembly with force until the buckle is completely disengaged from the locking piece, so that the base and the transformer assembly are separated. Then, when the driving part is pressed in the direction of the cavity, the driving part simultaneously drives the movable part to rotate around the rotating part, and the movable part is completely embedded in the cavity, so that a notch is formed on one side of the transformer assembly. The current wire passing through the transformer assembly can be separated from the transformer assembly through the notch, so that the transformer assembly can be completely disassembled; when installing the transformer assembly, the current wire can be inserted into the through hole of the transformer assembly through the notch, and the bottom of the transformer assembly is pressed hard toward the concave cavity on the base until the buckle is completely buckled into the locking piece, so that the transformer assembly is completely fixed on the base.

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