Wiring device of current transformer

Abstract

The invention discloses a current transformer wiring device, and relates to the technical field of power distribution networks, the current transformer wiring device comprises a base, a socket and a plug, one side of the base is fixedly connected with the bottom of a current transformer; the socket is fixedly arranged on the other side of the base, a plurality of hole sites are integrated in the socket, and secondary lines of the current transformers are connected into the corresponding hole sites; the plug is integrated with pins in one-to-one correspondence with the hole sites, one end of each pin is connected with an output cable, and the other end of each pin can be inserted into the corresponding hole site and is conducted with a secondary line of the current transformer. According to the invention, the secondary wire of the current transformer is pre-connected to the corresponding hole site, the output wire of the output cable is pre-connected to the corresponding pin, the wiring of the secondary wire and the output cable of the current transformer can be realized only by butting the socket and the plug during actual installation, each wiring does not need to be distinguished on site, and the hidden danger of wiring errors is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution network, in particular to a current transformer wiring device. Background Art

[0002] The through-type low-voltage current transformer is generally used as an electric energy metering device. When installing it, the meter is installed and the power is connected only after all the power distribution projects have been installed and passed the acceptance. However, when installing the meter and connecting the power, the staff needs to climb up the transformer platform to install it. During on-site installation, the lines are complex and there are many terminals. It is necessary to temporarily distinguish the phases and the current and voltage wiring. This requires a high level of technical skills and is very easy to make incorrect wiring.

[0003] Therefore, there is an urgent need to design a current transformer wiring device that can reduce wiring errors. Summary of the invention

[0004] The purpose of the present invention is to provide a current transformer wiring device to solve the problems existing in the above-mentioned prior art. The secondary wire of the current transformer is pre-connected to the corresponding hole position, and the output wire of the output cable is pre-connected to the corresponding pin. During actual installation, the secondary wire of the current transformer and the output cable can be connected by only docking the socket and the plug. There is no need to distinguish each wiring on site, which reduces the hidden danger of wiring errors.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a current transformer wiring device, comprising:

[0007] A base, one side of which is fixedly connected to the bottom of the current transformer;

[0008] A socket is fixedly arranged on the other side of the base, and a plurality of holes are integrated in the socket, and the secondary wires of the current transformer are connected to the corresponding holes;

[0009] The plug is integrated with pins corresponding to the holes one by one, one end of each of the pins is connected to the output cable respectively, and the other end of the pin can be inserted into the corresponding hole and is connected to the secondary line of the current transformer.

[0010] Optionally, a first wiring copper piece is fixed in the hole, a second wiring copper piece connected to the pin is fixed in the plug, the first wiring copper piece and the second wiring copper piece are both hollow structures, the secondary line of the current transformer is connected to the corresponding first wiring copper piece, and the output line of the output cable is connected to the corresponding second wiring copper piece.

[0011] Optionally, the side wall of the socket is provided with a plurality of positioning holes perpendicular to the hole positions, each of the side walls of the hole positions is connected to at least one of the positioning holes, and the side wall of the plug is provided with a plurality of positioning holes perpendicular to the second wiring copper piece; the side walls of the first wiring copper piece and the second wiring copper piece are provided with threaded holes coaxial with the corresponding positioning holes, and positioning screws are passed through the positioning holes, and the ends of the positioning screws can be threadedly connected to the corresponding threaded holes.

[0012] Optionally, the first wiring copper component includes two half-cylinders with arc-shaped radial cross-sections, and the two half-cylinders can form the first wiring copper component with a hollow structure when connected to each other, wherein the side wall of one of the half-cylinders is provided with the threaded hole, and the inner wall of the other half-cylinder is provided with a connecting hole coaxial with the threaded hole, and one end of the screw can pass through the threaded hole and be fixedly connected to the connecting hole; the second wiring copper component has the same structure as the first wiring copper component.

[0013] Optionally, a plurality of slots are formed on one side of the base, the outer sides of the slots are in contact with the current transformer, and a bottom plate is fixedly provided on the inner side of the slots, and the bottom plate is fixedly connected to the insert of the current transformer by bolts.

[0014] Optionally, a sealing gasket is fixedly provided between the current transformer and the base.

[0015] Optionally, each of the hole side walls is connected with two positioning holes, and the two positioning holes are arranged in parallel at an upper position and a lower position of the positioning hole side wall.

[0016] Optionally, a flange is fixedly provided on the outer side of the socket, a connecting hole is opened on the flange, the flange abuts against one side of the base, and is fixedly connected to the base via a connecting bolt passed through the connecting hole.

[0017] Optionally, one end of the pin is inserted into the second copper wiring member and fixed by a fastening screw passing through a side wall of the second copper wiring member.

[0018] Optionally, a card slot is provided on the outer side of the socket, and a card block is provided on the outer side of the plug, and the card block can be inserted into the card slot on the same side.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] The present invention adopts a plug and socket structure, the secondary line of the current transformer is pre-connected to the corresponding hole position of the socket, and the output line of the output cable is pre-connected to the pin of the plug, so that the voltage, current and grounding wires are pre-connected respectively before installation, and there is no need to split multiple cables during on-site installation, and there is no need to temporarily distinguish the corresponding voltage, current, grounding wires, etc. on site. It only needs to plug the plug into the corresponding socket to achieve the corresponding connection and conduction of each line of the current transformer and each line of the output cable, thereby reducing the problem of wrong connection caused by removing and dividing the wires during on-site installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a partial structural schematic diagram of the current transformer wiring device of the present invention;

[0023] Figure 2 A top view of the socket of the present invention;

[0024] Figure 3 This is a front view of the socket of the present invention;

[0025] Figure 4 A bottom view of the socket of the present invention;

[0026] Figure 5 A top view of the plug of the present invention;

[0027] Figure 6 This is a front view of the plug of the present invention;

[0028] Figure 7 It is a bottom view of the plug of the present invention.

[0029] In the figure: 1-base, 2-plug, 3-socket, 4-current transformer, 5-hole, 6-pin, 7-positioning hole, 8-first wiring copper fitting, 9-second wiring copper fitting, 10-slot, 11-insert, 12-secondary wire, 13-flange, 14-slot, 15-block, 16-sealing pad. DETAILED DESCRIPTION

[0030] 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.

[0031] The purpose of the present invention is to provide a current transformer wiring device to solve the problems existing in the above-mentioned prior art. The secondary wire of the current transformer is pre-connected to the corresponding hole position, and the output wire of the output cable is pre-connected to the corresponding pin. During actual installation, the secondary wire of the current transformer and the output cable can be connected by only docking the socket and the plug. There is no need to distinguish each wiring on site, which reduces the hidden danger of wiring errors.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] At present, the current transformers used in electric energy metering are generally through-type low-voltage current transformers, which are electrical devices used to measure and monitor current in AC circuits. This type of current transformer is named for its unique design. Its secondary winding is built around a hollow toroidal core, and the primary conductor (i.e., the conductor of the measured current) passes through this core. Through-type current transformers work on the principle of electromagnetic induction. When the primary conductor (i.e., the primary side of the current transformer) passes through the core, it generates a magnetic field around the core. This magnetic field induces current in the secondary winding (i.e., the secondary side of the current transformer). The magnitude of the induced current is proportional to the current in the primary conductor, and this ratio is determined by the design of the current transformer. During installation, it is necessary to wait until all distribution projects are installed and passed the acceptance before installing the meter and connecting the electricity. Since the voltage of three-phase electricity users is three-phase, it is necessary to install current transformers on all three phases, but the existing current transformers are separate and independent. Therefore, three current transformers need to be installed one by one with the three phases. When installing the meter and connecting the electricity, the staff needs to distinguish the phases and the current and voltage wiring on site, which requires a high level of technical skills. The voltage line, current line, grounding line, etc. of each current transformer need to be carefully identified during installation, and the installation efficiency is low. It is very easy to make incorrect wiring, such as reverse phase sequence, current and voltage polarity do not correspond, voltage and current are misplaced, and current direction is reversed.

[0034] In order to reduce the wiring error rate and improve the wiring efficiency during on-site installation, the present invention provides a current transformer wiring device, such as Figure 1 to Figure 7As shown, it includes a base 1, a socket 3 and a plug 2. The calibrated current transformer 4 is passed through the low-voltage end of the transformer and fixed. The current transformer 4 is directly installed at the low-voltage end of the transformer, which reduces the loss of line impedance to measurement and improves the accuracy of measurement. The structure and measurement principle of the current transformer 4 belong to conventional technology and are not described in detail. Then the bottom of the current transformer 4 is fixedly connected to one side of the base 1. The socket 3 is fixedly arranged on the other side of the base 1, and a plurality of holes 5 are integrated in the socket 3. The secondary lines 12 of the three current transformers 4 are respectively connected to the corresponding holes 5, and the secondary lines 12 are the output lines of the secondary windings. The plug 2 is integrated with pins 6 corresponding to the holes 5 one by one. One end of the plurality of pins 6 is respectively connected to the output cable, and the output cable is externally connected to the meter. The other end of the pin 6 can be inserted into the corresponding hole 5 and is connected to the secondary line 12 of the current transformer 4. There are marks on the cable, the socket 3 and the plug 2, which can be connected one by one. After the wiring is connected, the plug 2 is inserted into the socket 3 without wiring errors. The above scheme of the present invention makes wiring convenient and efficient. By clearly marking the corresponding line numbers at the positions of each hole 5 and the pin 6, a fool-proof plug-in can be adopted. The plug 2 and the socket 3 adopt the pin 6 type, which can be quickly installed and eliminates safety hazards.

[0035] In order to improve the stability of the wiring and ensure smooth wiring conduction, a first wiring copper piece 8 is fixedly provided in the hole position 5 in this embodiment, and a second wiring copper piece 9 connected to the pin 6 is fixedly provided in the plug 2. The first wiring copper piece 8 and the second wiring copper piece 9 are both hollow structures. The secondary line 12 of the current transformer 4 is connected to the corresponding first wiring copper piece 8, and the output line of the output cable is connected to the corresponding second wiring copper piece 9. The wiring conduction is achieved through the first wiring copper piece 8 and the second wiring copper piece 9; in order to fix the wiring terminal at the corresponding wiring copper piece, a plurality of positioning holes 7 perpendicular to the hole position 5 are opened on the side wall of the socket 3, each of which is provided with a plurality of positioning holes 7 perpendicular to the hole position 5. Each hole position 5 is connected to at least one positioning hole 7 on its side wall, and the plug 2 is provided with a plurality of positioning holes 7 perpendicular to the second wiring copper piece 9; the first wiring copper piece 8 and the second wiring copper piece 9 are provided with threaded holes coaxial with the corresponding positioning holes 7 on their side walls, and positioning screws are passed through the positioning holes 7, and the ends of the positioning screws can be threadedly connected to the corresponding threaded holes. When the corresponding secondary line 12 is passed through the first wiring copper piece 8 and the corresponding output line is passed through the second wiring copper piece 9, the positioning screws are tightened, and the positioning screws can be used to fix the secondary line 12 against the first wiring copper piece 8, and the output line can be fixed against the second wiring copper piece 9.

[0036] In a preferred embodiment, two positioning holes 7 are provided on the side wall of each hole position 5, and the two positioning holes 7 are arranged in parallel at the upper position and the lower position of the side wall of the positioning hole 7. Similarly, two positioning holes 7 are correspondingly provided on the outer wall of each second wiring copper piece 9, so that the first wiring copper piece 8 and the second wiring copper piece 9 are fixed with two positioning screws, which improves the stability of the wiring and prevents the problem of poor contact, heat, or even burning of the wiring terminal caused by loosening of the positioning screw when wiring with one positioning screw.

[0037] In order to adapt to the wiring of different wire diameters and facilitate installation, in this embodiment, the first wiring copper component 8 is made by butting two half-cylinders with arc-shaped radial cross-sections. After the two half-cylinders are butted, a first wiring copper component 8 with a hollow structure can be formed, wherein a threaded hole is provided on the side wall of one half-cylinder, and a connecting hole coaxial with the threaded hole is provided on the inner wall of the other half-cylinder. One end of the screw can pass through the threaded hole and be fixedly connected to the connecting hole, and the wiring terminal inside it is fixedly abutted; the second wiring copper component 9 has the same structure as the first wiring copper component 8, so that the tightness of the screw can be adjusted according to the wire diameter of the wiring terminal, and then the inner diameter of the first wiring copper component 8 and the second wiring copper component 9 can be adjusted to adapt to the use of wiring terminals with different wire diameters.

[0038] In order to install and fix the socket 3, the present invention has a plurality of slots 10 on one side of the base 1. The outer side of the slot 10 abuts against the current transformer 4, and a bottom plate is fixedly provided on the inner side of the slot 10. Waist-shaped holes are provided at both ends of the slot 10. The bottom plate is fixedly connected to the insert 11 of the current transformer 4 by bolts penetrated through the waist-shaped holes. The slot 10 is also a waist-shaped structure, and the installation position of the current transformer 4 can be adjusted according to the actual center distance of the transformer. The secondary line 12 of the current transformer 4 enters the base 1 through the slot 10, and then is connected to the socket 3 corresponding to the other side of the base 1. In order to prevent rainwater erosion and improve the sealing performance, a sealing gasket 16 is fixedly provided between the current transformer 4 and the base 1. At the same time, a sealing gasket 16 can also be provided on the other side of the base 1 at the position where the socket 3 is installed, which can prevent rain and avoid oxidation of the terminal.

[0039] When the socket 3 and the plug 2 are plugged in, in order to improve the connection firmness between the two, a flange 13 is fixedly provided on the outer side of the socket 3, a connection hole is opened on the flange 13, the flange 13 abuts against one side of the base 1, and is fixedly connected to the base 1 through a connection bolt passed through the connection hole, so that the socket 3 is fixed on the base 1. A card slot 14 is provided on the outer side of the socket 3, and a card block 15 is provided on the outer side of the plug 2, and the card block 15 can be inserted into the card slot 14 on the same side, so as to achieve a fixed connection between the plug 2 and the socket 3.

[0040] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A current transformer wiring device, characterized in that: include: A base, one side of which is fixedly connected to the bottom of the current transformer; A socket is fixedly arranged on the other side of the base, and a plurality of holes are integrated in the socket, and the secondary wires of the current transformer are connected to the corresponding holes; The plug is integrated with pins corresponding to the holes one by one, one end of each of the pins is connected to the output cable respectively, and the other end of the pin can be inserted into the corresponding hole and is connected to the secondary line of the current transformer.

2. The current transformer wiring device according to claim 1, characterized in that: A first copper wiring piece is fixed in the hole, a second copper wiring piece connected to the pin is fixed in the plug, the first copper wiring piece and the second copper wiring piece are both hollow structures, the secondary line of the current transformer is connected to the corresponding first copper wiring piece, and the output line of the output cable is connected to the corresponding second copper wiring piece.

3. The current transformer wiring device according to claim 2, characterized in that: The side wall of the socket is provided with a plurality of positioning holes perpendicular to the hole positions, and each of the side walls of the hole positions is connected to at least one of the positioning holes. The side wall of the plug is provided with a plurality of positioning holes perpendicular to the second copper wiring piece. The side walls of the first copper wiring piece and the second copper wiring piece are provided with threaded holes coaxial with the corresponding positioning holes, and positioning screws are passed through the positioning holes, and the ends of the positioning screws can be threadedly connected to the corresponding threaded holes.

4. The current transformer wiring device according to claim 3, characterized in that: The first copper wiring member includes two half-cylinders with arc-shaped radial cross-sections. The two half-cylinders can form the first copper wiring member with a hollow structure when connected. The side wall of one of the half-cylinders is provided with the threaded hole, and the inner wall of the other half-cylinder is provided with a connecting hole coaxial with the threaded hole. One end of the screw can pass through the threaded hole and be fixedly connected to the connecting hole; the second copper wiring member has the same structure as the first copper wiring member.

5. The current transformer wiring device according to claim 1, characterized in that: A plurality of slots are provided on one side of the base, the outer sides of the slots are in contact with the current transformer, a bottom plate is fixedly provided on the inner side of the slots, and the bottom plate is fixedly connected to the insert of the current transformer by bolts.

6. The current transformer wiring device according to claim 5, characterized in that: A sealing gasket is fixedly provided between the current transformer and the base.

7. The current transformer wiring device according to claim 3, characterized in that: Each of the hole side walls is connected with two positioning holes, and the two positioning holes are arranged in parallel at the upper position and the lower position of the positioning hole side wall.

8. The current transformer wiring device according to claim 1, characterized in that: A flange is fixedly provided on the outer side of the socket, a connecting hole is opened on the flange, the flange abuts against one side of the base, and is fixedly connected to the base via a connecting bolt passed through the connecting hole.

9. The current transformer wiring device according to claim 3, characterized in that: One end of the plug pin is inserted into the second copper wiring piece and is fixed by a fastening screw penetrating through the side wall of the second copper wiring piece.

10. The current transformer wiring device according to claim 1, characterized in that: A card slot is provided on the outer side of the socket, and a card block is provided on the outer side of the plug. The card block can be inserted into the card slot on the same side.

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