KR20200000731U - Integral current transformer - Google Patents

Abstract

Disclosure of the Integral Current Transformer. The disclosed one-piece current transformer: three mounting current transformers mounted on the mounting base and mounted on the mounting base, each connected to three phases (A, B, C) of the integrated watt-hour meter to measure the current of each phase A, B, C It is characterized in that it comprises; and, mounted on a mounting base, a terminal block interconnected via a three-phase current transformer and an integrated watt-hour meter through a wire, and a protective cover mounted on the current transformer and the terminal block to protect the upper device. .

Description

Integral current transformer {INTEGRAL CURRENT TRANSFORMER}

The present invention relates to an integral current transformer, and more specifically, to improve assembly performance by installing three current transformers for a single-phase power supply and supply unit in a three-phase, four-wire system in a single mounting unit to improve assembly and protect the transparent cover. It relates to an assembled integrated current transformer that can be easily checked the connection state between the terminals because the cover is coupled from the upper side.

In general, the current transformer for power supply and demand is installed with an integrated watt-hour meter to measure the power in use, and the current transformer for power supply and demand referred to here is a current transformer device that obtains a large current and a small current (5A) of low current in an AC state. to be. The structure of the current transformer for power supply and demand is wound around a primary coil with a small number of windings and a secondary coil with a large number of windings, and is connected to the secondary coil with a computerized electricity meter.

Conventional current transformers for power supply and demand are installed separately in three phases, one phase A, one phase B, and one phase C in accordance with a three-phase, four-wire configuration. Mainly, three current transformers for power supply and demand are installed and operated together, and a total of three units are installed in close proximity to each other. As a result, installation work takes a long time, and between phase A, phase B, and phase C Many problems are caused by reverse phase and phase loss due to error or incorrect connection of the current transformers for power supply and demand, and when the primary and secondary terminals of the current transformer for power supply and demand are exposed, the taping part is damaged. There is a risk of electric shock.

Therefore, there is a need to improve this.

A related background art is Republic of Korea Patent Publication No. 10-2016-0024571 (2016.03.07, the name of the invention: block type power distribution device).

The present invention was created by the above-mentioned necessity, and three current transformers for single-phase power supply and demand are installed integrally in a three-phase, four-wire type in a single mounting unit to improve assembly and protect the transparent material from the upper side. An object of the present invention is to provide an assembled integrated current transformer capable of easily confirming a connection state between terminals because it is covered and coupled.

In addition, the present invention provides a structure that can reduce or prevent the risk of safety accidents due to electric shock and challenges during wiring work or electricity meter replacement work, and provide an integrated current transformer that can easily perform electricity meter replacement work in an uninterrupted state. It has its purpose.

In order to achieve the above object, the integrated current transformer of the present invention includes: an insulating material mounting table; Three current transformers mounted on the mounting base and connected to three phases (A, B, C) of the integrated watt-hour meter to measure currents in each of A, B, and C phases; A terminal block mounted on the mounting table and interconnecting the current transformer and the three-phase integrated power meter through a wire; And a protective cover mounted on the current transformer and the terminal block and protecting an upper device.

Each of the current transformers includes a primary terminal busbar and a secondary terminal, and the primary terminal busbar is provided with the voltage withdrawal terminal required for connection with the integrated power meter, and the voltage withdrawal terminal and the secondary terminal through a wire. It is characterized in that it is connected to the terminal block.

The terminal block is characterized in that it further comprises a shorting piece with a shorting hole capable of shorting the secondary winding circuit of the current transformer.

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It is characterized in that the current flow of the integrated watt-hour meter is short-circuited by inserting a current short-circuiting pin provided in the mounting hole in the short-circuiting hole, so that the integrated watt-hour meter is easily replaced.

The mounting base is an insulator, and the upper end of the mounting base is provided with a neutral terminal to which a voltage neutral line (N) is connected, and a ground terminal to which a current ground line (E) is connected to prevent various errors in the ground system, and each phase A, B , It is characterized in that the indication on C, the power supply side, and the load side are displayed on the upper side, and even if the protective cover is separated, connection guidance, incorrect connection, and reverse connection are prevented.

The protection cover includes a current transformer protection cover covering the upper surface of the current transformer; And a terminal block protection cover covering an upper surface of the terminal block, wherein the protective cover is formed with a plurality of coupling holes and is coupled to the mounting base through coupling of fastening members.

The protective cover is provided with a plurality of sealing holes, the sealing hole is characterized in that the sealing is made by a sealing device connected to the through hole of the fastening member coupled to the mounting cover to seal.

The protective cover is made of an insulator made of a transparent material, and the A, B, and C phases of each phase and the power side and the load side are displayed on the upper side of the protective cover to prevent wiring guidance, incorrect wiring, and reverse wiring. It is characterized in that a voltage metering hole is included in the voltage withdrawing terminal of the current transformer to pass through the voltage metering rod.

The integrated current transformer according to the present invention can reduce the working time and the working space by fixing and installing three current transformers for power supply and demand in one mounting unit.

In addition, the present invention, by connecting the primary terminal, secondary terminal, and voltage withdrawal terminal of the power supply and current transformer to the secondary terminal, it is possible to facilitate the connection with the watt-hour meter, prevent incorrect wiring and prevent safety accidents Do.

In addition, the present invention can be conveniently checked and checked using a terminal block when checking the voltage and current state of the current transformer.

In addition, the present invention prevents safety accidents due to incorrect and reverse wiring by installing protective covers with power and load on each phase on the upper side of the current transformer, and visually inspects the connection between the primary and secondary terminals. can do.

In addition, the present invention, by using the short-circuit piece and the current short-circuit pin of the current transformer secondary circuit provided in the terminal block, it is possible to easily replace the integrated power meter in a stable state in the uninterrupted state.

In addition, the present design, the mounting system is installed with a voltage neutral terminal and a current grounding terminal that can be classified and classified according to the purpose of the grounding system to prevent the problem of accidents due to grounding.

In addition, the present design uses a plastic composite material that is safe for electric shock and electric shock, so it is easy to transport and install due to its light weight, and provides a lattice-type reinforcement structure at the rear of the mount to prevent bending and damage due to load. can do.

1 is a perspective view of an integrated current transformer according to an embodiment of the present invention.
2 is a plan view of an integrated current transformer according to an embodiment of the present invention.
3 is a side view of an integrated current transformer according to an embodiment of the present invention.
4 is a circuit diagram of an integrated current transformer according to an embodiment of the present invention.
5 is a perspective view of a terminal block applied to an integrated current transformer according to an embodiment of the present invention.
6 is a perspective view of a protective cover applied to an integrated current transformer according to an embodiment of the present invention.
7 is a perspective view showing a state in which a sealing device is provided in a protective cover of an integrated current transformer according to an embodiment of the present invention.
8 is a plan view of a mounting table applied to an integrated current transformer according to an embodiment of the present invention.

Hereinafter, an integrated current transformer according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a perspective view of an integrated current transformer according to an embodiment of the present invention, FIG. 2 is a plan view of an integrated current transformer according to an embodiment of the present invention, and FIG. 3 is an integrated current transformer according to an embodiment of the present invention 4 is a circuit diagram of an integrated current transformer according to an embodiment of the present invention, FIG. 5 is a perspective view of a terminal block applied to the integrated current transformer according to an embodiment of the present invention, and FIG. 6 is a perspective view of the present invention A perspective view of a protective cover applied to an integrated current transformer according to an embodiment, and FIG. 7 is a perspective view showing a state in which a sealing device is provided on the protective cover of the integrated current transformer according to an embodiment of the present invention. 8 is a plan view of a mounting table applied to an integrated current transformer according to an embodiment of the present invention.

1 to 8, the integrated current transformer 100 according to an embodiment of the present invention includes a mounting table 110, three current transformers 120, 130, 140, a terminal block 150, and a protective cover 160 do.

The mounting table 110 is made of an insulating material such as a synthetic resin material, and is made of a rectangular or rectangular plate.

In the mounting table 110, three current transformers 120, 130, and 140 are installed. As a result, the current transformers 120, 130, and 140 are integrally moved to easily check work, such as connecting electric wires, and significantly improve assembly.

The mounting table 110 is for accommodating the current transformers 120, 130, 140 and the terminal block 150, and may be fixedly installed at a position set by fastening elements such as bolts through the fixing hole 112.

The upper part of the mounting table 110 is provided with a neutral terminal 114 to which the voltage neutral line N is connected and a ground terminal 115 to which the current ground line E is connected to prevent various errors in the ground system, and each phase A , B and C, and the power supply side and load side are displayed on the upper part, so that even if the protective cover 160 is removed, connection guidance, incorrect connection, and reverse connection are prevented.

The current transformers 120, 130, and 140 are configured to measure the currents of the A, B, and C phases, respectively, connected to the three phases (A, B, C) of the integrated power meter.

Current transformers (120, 130, 140) are provided with a primary terminal busbar (121, 131, 141) and a secondary terminal (122, 132, 142), the primary terminal busbar (121, 131, 141) is integrated An installation hole is formed in which voltage withdrawal terminals 123, 133, and 143, which are required for connection with a power meter (not shown), are installed. The installation hole is formed through the upper and lower sides of the primary terminal busbars 121, 131, and 141, and the voltage withdrawing terminals 123, 133, and 143 are inserted into and fixed to the installation hole.

The voltage withdrawing terminals 123, 133, and 143 and the secondary terminals 122, 132, and 142 are connected to the terminal block 150 through a wire 170.

The terminal block 150 is mounted on the mounting table 110, and is configured to interconnect the current transformers 120, 130, and 140 with three phases of the integrated wattmeter and wires.

The terminal block 150 is a connection mechanism that interconnects incoming lines that are introduced into the outdoors from outside and wires that are provided indoors to supply power to various loads. 1S, 1L, 2S, 2L for each phase of A, B, and C of each integrated wattmeter , 3S, 3L terminals and voltage measuring terminals (P1, P2, P3) are connected to the terminal block 150 through wires. In addition, ground terminals 114 and 115 that are respectively connected to the voltage neutral line N and the current ground line E are connected.

As shown in FIG. 5, the terminal block 150 is provided with a short-circuiting piece 152, and the short-circuiting piece 152 is provided with a short-circuiting hole 154 into which a current short-circuiting pin 116 is inserted. Accordingly, the current shorting pin 116 (see FIG. 1) is inserted into the shorting hole 154 to short circuit the secondary winding circuits of the current transformers 120, 130, and 140 during use. That is, the integrated watt-hour meter can be temporarily replaced in an uninterrupted state without a power failure by using the short circuit piece 152 and the current shorting pin 116 of the current transformer secondary circuit provided in the terminal block 150. In this way, the current shorting pin 116 provided in the mounting table 110 is inserted into the shorting hole 154 to short the current flow of the integrated watt-hour meter, and thus the integrated watt-hour meter can be easily replaced. The current shorting pin 116 may be detachably coupled to the mounting table 110 by a screw method.

The protective cover 160 is mounted on the current transformers 120, 130, 140 and the terminal block 150, and is configured to protect the upper device.

The protective cover 160 is for protecting the primary terminal busbars 121, 131, and 141 of the current transformers 120, 130, and 140, and the secondary terminals 122, 132, 142, and the terminal block 150. It can be implemented in a possible form.

Referring to FIG. 6, the protective cover 160 is an insulator made of a transparent material, and the power side and load side of each phase are displayed on the upper side. Accordingly, reverse wiring and safety accidents are prevented when the current transformers 120, 130, and 140 are installed, and the connection status of the primary terminal booth ratios 121, 131, 141, and secondary terminals 122, 132, 142 is visually observed. It can be conveniently checked.

Here, the protective cover 160 is formed to cover all the top surfaces of the three current transformers 120, 130, and 140 and the terminal block 150.

The protection cover 160 includes a current transformer protection cover 162 that covers and protects the upper surfaces of the current transformers 120, 130, and 140, and a terminal block protection cover 164 that protects by covering the upper surfaces of the terminal blocks 150. .

Between the current transformer protection cover 162 and the terminal block protection cover 164, a reinforcing rib 165 for reinforcing strength is formed to prevent bending of the protection cover 160 and to be firmly fixed.

In addition, a plurality of coupling holes 168 may be formed in the protective cover 160 to be detachably coupled to the mounting table 110 through coupling of the fastening member 180.

The protective cover 160 is provided with a plurality of sealing holes 166.

Referring to FIG. 7, the sealing hole 166 is connected to the through hole 182 of the fastening member 180 having the protective cover 160 coupled to the mounting stand 110 and sealed by a sealing device 190 for sealing. This is done. As a result, the protective cover 160 cannot be arbitrarily separated from the mounting table 110 due to the sealing device 190. Since the sealing device 190 is connected by a sealing line, and the end of the sealing line is fixed by a sealing body, sealing is performed, and the protective cover 160 is individually separated to prevent manipulation of the current transformers 120, 130, 140, and the like. You can.

The protective cover 160 may be provided with a voltage metering hole 169, respectively, so that the voltage meter rods pass through the voltage withdrawal terminals 123, 133, and 143 of the current transformers 120, 130, and 140. The diameter of the voltage metering hole 169 may be formed as a hole having a diameter equal to or greater than the diameter of the voltage metering rod.

Referring to FIG. 8, the mounting table 110 is a gray-based plastic insulator, and on the upper side of the mounting table 110, A phase, B phase, C phase indicating each phase, and a power side load side are displayed. Accordingly, even in the absence of the protective cover 160 of FIG. 6, the connection direction is guided to prevent incorrect and reverse connections.

In addition, in order to prevent an error in the grounding system at the upper portion of the mounting table 110, it is easy to construct a ground according to the installation environment by separating the neutral terminal 114 for voltage and the ground terminal 115 for current.

In addition, the weight of the current transformers 120, 130, 140 and the terminal block (! 50) is applied to the rear of the mounting table 110 according to FIG. 8, even though the mounting table 110 is light in weight by applying a rib 118 to prevent bending. And to withstand the load applied when working. At this time, the rib 118 is configured to withstand twisting and bending in the vertical direction by applying a lattice structure.

As described above, according to the design of the present embodiment, three current transformers 120, 130, 140 and the terminal block 150 are formed in an integral structure on one mounting table a 110, and are installed in a set place such as a wall surface. When the light weight and fixing holes are applied, bolting is easy, and the working time can be reduced than installing the three current transformers 120, 130, and 140 separately.

In addition, by connecting the wires 170 from the primary and secondary terminals of the current transformers 120, 130, and 140 to the terminal block 150, it is possible to prevent incorrect wiring during installation and prevent safety accidents. In addition, when checking the current transformers 120, 130, and 140, it is possible to inspect the current through the terminal block 150 without having to directly contact the current transformer, so it can be checked safely and conveniently.

In addition, by using the protective covers 160 on each side of the current transformers 120, 130, and 140, the power supply side and load side are marked, to prevent reverse wiring and safety accidents caused by this, and to check the connection between the primary and secondary terminals. Visual inspection is possible.

The present invention has been described with reference to the embodiment shown in the drawings, but this is only an example, and those skilled in the art to which the art belongs, various modifications and equivalent other embodiments are possible. Will understand.

Therefore, the true technical protection scope of the present invention should be defined by the claims below.

100: current transformer 110: mounting table
112: Fixed hole 114: Neutral wire terminal (N)
115: ground terminal (E) 116: current shorting pin
120, 130, 140: Current transformer 121, 131, 141: 1st terminal bus bar
122, 132, 142: secondary terminal 123, 133, 143: voltage withdrawal terminal
150: terminal block 152: short circuit
154: Short circuit hole 160: Protective cover
162: current transformer protection cover 164: terminal block protection cover
166: sealed hole 168: combined hole
169: voltage reading hole 170: electric wire
180: fastening member 182: through hole
190: sealing device

Claims (8)

Insulation material mounting table;
Three current transformers mounted on the mounting table and connected to three phases (A, B, C) of the integrated watt-hour meter to measure currents in each of A, B, and C phases;
A terminal block mounted on the mounting table and interconnecting the current transformer and the three-phase integrated power meter through a wire; And
A protective cover mounted on the current transformer and the terminal block to protect an upper device;
Integral current transformer, characterized in that it comprises a.
According to claim 1,
Each of the current transformers includes a primary terminal busbar and a secondary terminal,
The primary terminal busbar is provided with the voltage withdrawal terminal required for connection with the integrated power meter,
Integral current transformer, characterized in that the voltage withdrawal terminal and the secondary terminal is connected to the terminal block through a wire.
According to claim 1,
The terminal block further comprises a short circuit piece with a shorting hole capable of shorting the secondary winding circuit of the current transformer.
According to claim 3,
An integrated current transformer, characterized in that the integrated flow meter is easily replaced by inserting a current shorting pin provided in the mounting hole into the shorting hole to short the current flow of the integrated power meter.
According to claim 1,
The mounting base is an insulator,
The upper part of the mounting table is equipped with a neutral terminal to which the voltage neutral line (N) is connected, and a ground terminal to which the current ground line (E) is connected to prevent various errors in the grounding system. , The load side is displayed on the upper part, even if the protective cover is disconnected, the integrated current flow device characterized in that it prevents connection and misconnection and reverse connection.
According to claim 1,
The protective cover,
A current transformer protection cover covering an upper surface of the current transformer; And
It includes a terminal block protection cover for covering the top surface of the terminal block,
The protective cover is an integral current transformer, characterized in that a plurality of coupling holes are formed and coupled to the mounting base through coupling of a fastening member.
The method of claim 6,
A plurality of sealing holes are provided in the protective cover.
The sealing hole is an integral current transformer, characterized in that the sealing is made by a sealing device that is connected to and sealed with a through hole of a fastening member that has the protective cover coupled to the mounting table.
According to claim 1,
The protective cover is made of an insulating material of a transparent material,
A, B, and C phases of each phase are displayed on the upper part of the protective cover, and the power supply side and load side are displayed to prevent wiring guidance, incorrect wiring, and reverse wiring.
An integrated current transformer, characterized in that a voltage reading hole is included in the upper portion of the protection cover so that a voltage reading rod can pass through the voltage withdrawing terminal of the current transformer.

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