Novel improved current transformer wiring structure

Abstract

The utility model discloses a novel current transformer wiring improvement structure which comprises an inner shell, a coil, an outer shell and a cable head, the coil is installed on the inner shell, the outer shell is installed on a bottom plate of the inner shell, the coil is located in the outer shell, and a lead wire with the length capable of being connected to a user terminal is reserved in the coil. A bottom plate of the inner shell is provided with a wire outlet opening, a cable head is installed at the wire outlet opening, and a plurality of leads penetrate through the cable head to be directly connected to a user terminal so as to provide a current source for equipment. By means of the mode, the current transformer is simple in structure, connection points of a secondary circuit of the current transformer are reduced, the probability of disconnection or poor contact of the connection points of the secondary circuit is reduced, and manufacturing cost is reduced.

Description

Technical Field

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

[0002] The current transformer is referred to as CT. It has a coil built in. The lead wires reserved on the coil are relatively short. The commonly used structure is to install a terminal box 01 on the coil housing. The terminal box 01 is equipped with a terminal block 02. The coil is connected to the terminal block 02 through the lead wires, and then the terminal block 02 is connected to the external circuit through the secondary cable lead wire 03 to provide a current source for the user terminal. Figure 1 As shown, since several leads are connected to the terminal block, the more connection points there are in the current loop, the greater the risk of disconnection or poor contact, because the connection point materials are mostly conductive metal bodies (such as copper and aluminum), which are easily oxidized in the air. After oxidation, the conductivity is reduced, which will lead to poor contact at the connection points. Moreover, the connection points are mostly fastened with bolts, and there may be loose connections. In addition, the terminal box itself has cost and installation problems. When installed on the casing, the integrity of the casing is destroyed and additional waterproofing is required. The secondary cable leads need to be led out from the holes in the casing, which makes sealing difficult.

[0003] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a new improved structure of current transformer wiring. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a new improved current transformer wiring structure with a simple structure, reducing the connection points of the secondary circuit of the current transformer, reducing the probability of disconnection or poor contact of the secondary circuit connection points, and reducing the manufacturing cost.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a new type of improved current transformer wiring structure, which includes an inner shell, a coil and an outer shell, the inner shell is equipped with a coil, the bottom plate of the inner shell is equipped with an outer shell, the coil is located in the outer shell, and also includes a cable head, the coil is reserved for connecting to a lead of the length of the user terminal, the bottom plate of the inner shell is provided with an outlet opening, a cable head is installed at the outlet opening, and a number of leads pass through the cable head and are directly connected to the user terminal to provide a current source for the device.

[0006] Preferably, the cable head is mounted on a bottom plate in the housing to provide waterproofing.

[0007] Preferably, the inner shell includes a bottom plate and a mounting portion for mounting the coil, and the bottom plate and the mounting portion are integrally formed.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] A relatively long lead is reserved and directly connected to the user terminal, which reduces the connection points of the CT secondary circuit, greatly reduces the risk of disconnection or poor contact of the CT secondary circuit, and can provide a current source to the user terminal more stably;

[0010] At the same time, it reduces manufacturing costs, saves material costs for terminal blocks, terminal boxes, and terminal box covers, and also improves production efficiency;

[0011] The cable head is arranged on the bottom plate inside the housing and is waterproof;

[0012] The cable gland can hold multiple leads and create a tight seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the traditional current transformer structure.

[0014] Figure 2 This is a schematic diagram of a new type of current transformer wiring improvement structure.

[0015] Among them, 1. inner shell, 11. bottom plate, 12. mounting part, 2. coil, 21. lead wire, 3. outer shell, 4. cable head. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0017] See also Figure 2 , the utility model embodiment includes:

[0018] A novel improved wiring structure for a current transformer, the novel improved wiring structure for a current transformer comprises an inner shell 1, a coil 2, an outer shell 3 and a cable head 4, the inner shell 1 comprises a bottom plate 11 and a mounting portion 12 for mounting the coil 2, the bottom plate 11 and the mounting portion 12 are integrally formed, the coil 2 is mounted on the inner shell 1, the outer shell 3 is mounted on the bottom plate 11 of the inner shell 1, the coil 2 is located inside the outer shell 3, the coil 2 is reserved with a lead 21 of a length that can be connected to a user terminal, an outlet opening is provided on the bottom plate 11 of the inner shell 1, a cable head 4 is mounted at the outlet opening, the cable head 4 is mounted on the bottom plate 11 in the outer shell 3, a plurality of leads 21 pass through the cable head 4 and are directly connected to the user terminal, providing a current source for the device, the cable head 4 can fix the leads 21 and can be locked and sealed.

[0019] The utility model discloses a novel improved current transformer wiring structure, which has a simple structure, reduces the connection points of the secondary circuit of the current transformer, reduces the probability of disconnection or poor contact of the connection points of the secondary circuit, and reduces the manufacturing cost.

[0020] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A novel improved wiring structure of a current transformer, comprising an inner shell (1), a coil (2) and an outer shell (3), wherein the inner shell (1) is provided with the coil (2), the bottom plate (11) of the inner shell (1) is provided with the outer shell (3), and the coil (2) is located inside the outer shell (3), characterized in that: The device also comprises a cable head (4), the coil (2) is reserved with a lead wire (21) of a length that can be connected to a user terminal, a lead wire opening is provided on the bottom plate (11) of the inner shell (1), a cable head (4) is installed at the lead wire opening, and a plurality of lead wires (21) pass through the cable head (4) and are directly connected to the user terminal, thereby providing a current source for the device.

2. According to claim 1, a new type of current transformer wiring improvement structure is characterized in that: The cable head (4) is mounted on a bottom plate (11) inside the housing (3).

3. The novel improved current transformer wiring structure according to claim 1 is characterized in that: The inner shell (1) comprises a bottom plate (11) and a mounting portion (12) for mounting the coil (2); the bottom plate (11) and the mounting portion (12) are integrally formed.

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