KR200371971Y1 - Split current transformer - Google Patents

Abstract

The present invention relates to a split type current transformer, and more particularly, to a split type current transformer that can be separated and combined so as to freely attach or detach a wire or a cable that penetrates the center of the current transformer.

The structure of the present invention for this purpose is a split type current transformer for converting and outputting the current amount of the through-wire through a first case protruding on one side and the other end is formed with a first and second coupling hole is inserted into the screw; A second case coupled to the first case by forming a third and fourth coupling hole corresponding to the first and second coupling holes at one side and the other end, respectively, and inserting a screw into the coupling hole; A first core seated on the first case to generate magnetic flux; A second core seated on the second case to generate magnetic flux; A core cap formed on outer circumferential surfaces of the first and second cores to insulate the first and second cores; One end of the first and second cases are wound at a predetermined winding ratio to the first core and the second core so as to be connected to each other, and are connected to each other, and the other end is wound around the first core and the second core. The end includes a coil drawn out as a connecting terminal.

Description

Split current transformer

The present invention relates to a split type current transformer, and more particularly, to a split type current transformer capable of dividing the current transformer so as to freely engage and detach the wires or cables penetrating into the center of the current transformer.

In general, a current transformer is a device used to convert a high current (30 to 100,000 A) of an electric line into a current (5 or 1 A) capable of operating an instrument and a relay. Therefore, the current transformer is divided into two current transformers according to the purpose of use, and the first one is used as a metering current transformer and used to read the amount of power such as an ammeter and a meter, and the second as a relay current transformer. It is used for ground relay, over current relay, etc. to protect line, breaker and transformer.

Current transformers used for these two applications are currently available in two types, which are divided into general current transformers and split current transformers. Since the general current transformers are integrally formed, when initially installed on the track, the current transformers must be assembled through the center after assembling the current transformers when installing the current transformers in the enclosure of the circuit breaker or in the transformer, busbar, or cable. To assemble the device.

That is, since the general current transformer is formed integrally without a separate configuration, it is used under the premise that there is no dismantling and expansion of the current transformer since the cable is passed through the through hole formed in the center after the first installation of the current transformer. Therefore, in case of general current transformer, if the current transformer accident occurs due to user's inadvertent operation or additional expansion of current transformer occurs, the current transformer should be disconnected and the current transformer should be replaced after dismantling the cables assembled in the line. There is a problem that it is not easy.

Therefore, what is proposed to solve the problem of the general current transformer is a split type current transformer. The split type current transformer can be installed directly on a cable without breaking and dismantling of the line through the separate configuration of the current transformer when the current transformer is expanded and replaced in a facility constructed such that it is separated from the one-piece configuration of the general current transformer.

Such a conventional split current transformer is as proposed in Korean Utility Model Registration No. 282270. Here, the conventional split-type current transformer is separated into an upper body and a lower body, and when the cable is already installed, the upper body and the lower body are separated, and the cable is seated in the through hole formed in the center. By combining them, it is possible to add and replace current transformers without any work such as disconnection of cables or disconnection of cables.

However, such a conventional split current transformer does not wind a coil on the upper body core, but converts a high current through the cable into a commercial current while winding the coil only on the lower body core.

That is, in the conventional split current transformer, since the winding is concentrated only on the core of the lower body, the magnetic field generated by the primary current is generated when the primary line current flows to the center of the split core. Since the core part and the core without winding are different in size, the magnetization force (H) is rapidly saturated at the winding part and is deformed. Therefore, the amount of output current is not constant and changes rapidly (primary current line). Secondary current changes depending on where it is located.) There is a problem that the current performance of the current transformer is not satisfied, and there is a problem that burnout by over-excitation occurs.

Therefore, the present invention devised to solve the conventional problems as described above is divided into the body, each of the divided body is formed by the coil is equally formed in the core formed in each of the equal magnetic properties having the characteristics of equal It is an object to provide a split type current transformer.

The configuration of the present invention for achieving the above object is a split type current transformer for outputting the current amount of the through-wire through the current, protruding to one side and the other end of the first and second coupling hole is formed is inserted into the screw 1 case; A second case coupled to the first case by forming a third and fourth coupling hole corresponding to the first and second coupling holes at one side and the other end, respectively, and inserting a screw into the coupling hole; A first core seated on the first case to generate magnetic flux; A second core seated on the second case to generate magnetic flux; A core cap formed on outer circumferential surfaces of the first and second cores to insulate the first and second cores; One side end wound around the first and second cores insulated by the core cap at a predetermined turns ratio so as to be withdrawn / retracted outward from one side of the first and second cases, and wound around the first core. And a coil from which the other end wound on the second core is drawn out as a connection terminal.

Here, the first case is connected to the first connection hole for connecting the coil wound on the first core and the second core is drawn out / drawn from one side, and one end of the coil wound on the first core is connected And a first drawing hole drawn out as a terminal.

In addition, the second case has a second connection hole in which one side of the coil is drawn out / retracted corresponding to the first connection hole on one side, and a second lead-out portion in which the other end of the coil wound around the second core is drawn out as a connection terminal. Contains the ball.

1 is a perspective view showing a split type current transformer according to the present invention,

Figure 2 is a partial cutaway perspective view showing a split type current transformer according to the present invention,

Figure 3 is a front view showing a split type current transformer according to the present invention,

Figure 4 is a rear view showing a split type current transformer according to the present invention,

5 is a perspective view showing a core and a coil of a split current transformer according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10: case 11: the first case

111: first coupling hole 112: second coupling hole

113: first connection hole 114: first drawing hole

12: second case 121: third coupling hole

122; Fourth engagement hole 123: Second connection hole

124: second drawing hole 13: screw

20: core 21: first core

22: second core 30: core cap

40: coil 41: first connection terminal

42: second connection terminal

Hereinafter, a preferred embodiment of a split type current transformer according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a split type current transformer according to the present invention, FIG. 2 is a partial cutaway perspective view of the split type current transformer according to the present invention, FIG. 3 is a front view of the split type current transformer according to the present invention, and FIG. 4 is according to the present invention. Back view of a split type current transformer.

1 to 4, a split perspective view according to the present invention is formed on a divided case 10, a core 20 that is divided and seated on the case 10, and an outer circumferential surface of the core 20. And a coil 40 wound around the core 20 to insulate the core 20 and the core 20 insulated by the core cap 30.

In addition, the case 10 is divided into first and second cases 11 and 12, and the first case 11 has a first coupling hole 111 formed at one end thereof, and the first case 11 is formed at the other end thereof. Two coupling holes 112 are formed. Similarly, the second case 12 has a third coupling hole 121 corresponding to the first coupling hole 111 at one side end thereof, and a fourth matching the second coupling hole 112 at the other end thereof. Coupling hole 122 is formed. Therefore, the first and second cases 11 and 12 may have screws 13 in the first coupling hole 111, the third coupling hole 121, the second coupling hole 112, and the fourth coupling hole 122. ) Is fastened by joining.

In this case, the first case 11 and the second case 12 are formed by forming curved portions inward, respectively, so that both of the first and second cases 12 are coupled by tightening the screws 13. The bent portion of the summation is formed in the through-hole through which the conducting wire 50 passes.

The first core 21 is seated inside the first case 11, and the second core 22 is seated inside the second case 12. The first and second cores 21 and 22 are divided to match the first and second cases 11 and 12, and the first and second cases 11 are tightened by tightening the screws 13. When 12 is combined, one end and the other end of the first and second cores 21 and 22 are in close contact with each other.

In addition, the core cap 30 is formed on the outer circumferential surface of the first and second cores 21 and 22, and the core cap 30 is formed of an insulating material so that the first and second cores 21 and 22 are formed. And the energization between the coils 40 wound on the core 20. The coil 40 is wound around the outer circumferential surface of the core cap 30 formed on the first and second cores 21 and 22, which will be described in detail with reference to FIG. 5.

In addition, one side of the first case 11 and the second case 12, the first and second connection hole 113 is connected to the coil 40 wound on the first and second core (21, 22) 123 and first and second outlet holes 114 and 124 are formed, respectively, in which one end and the other end are drawn out as connection terminals of the coil 40, respectively.

That is, in the present application, the coil 40 is connected such that the coil 40 wound on the first core 21 is wound on the second core 22 through the first and second connection holes 113 and 123. The first connection terminal 41 formed at one end of the coil 40 wound around the first core 21 is drawn out through the first drawing hole 114, and is connected to the other end of the coil 40. The formed second connection terminal 42 is drawn out through the second drawing hole 124 and connected to other equipment. Here, the first and second outlet holes 114 and 124 and the first and second connection holes 113 and 123 may be formed only at one of the front and rear surfaces of the first and second cases 11 and 12. do.

5 is a perspective view showing a core and a coil of a split current transformer according to the present invention.

3 and 5, one end of the coil 40 is applied as a first connection terminal 41 whose end is drawn out through the first drawing hole 114 and connected to other equipment, and the The coil 40 is wound from one end of the first core 21 to the other end, and then wound to one end to be drawn out through the first connection hole 113 to the second case 12. It is introduced into the second connecting hole 123.

The other side of the coil 40 drawn through the second connection hole 123 winds the second core 22 from one side to the other side with a predetermined winding ratio, and the other end of the second core 22. When the winding up to the one end is wound again and the end is drawn out through the second outlet hole 124, the other end of the coil 40 is drawn out is used as the second connection terminal 42 connected to other equipment do.

The operation of the present invention through the configuration as described above will be described in detail below.

First, the first case 11 is released by unscrewing the screw 13 so that the conducting wire can be positioned in a circular through hole formed by each curved portion formed inside the first case 11 and the second case 12. And the second case 12 are divided.

At this time, the first and second cases 11 and 12 are divided, and the first and second cores 21 and 22 are divided and coils are formed at one end of the first and third coupling holes 111 and 121. Since 40) is not connected, the degree of opening of both sides can be increased, so that the conductive wire 50 is inserted in this direction. On the other hand, in the other side where the second and fourth coupling holes 112 and 122 of the first and second cases 11 and 12 are formed, the coil 40 is formed through the first and second connection holes 113 and 123. Since it is in the connected state, the opening degree of the said 1st and 2nd cases 11 and 12 is small.

Therefore, the user inserts the conductive wire 50 through one side of the first case 11 and the second case 12 to position the center portion of the first or second case 11, 12, and then, The first coupling hole 111 and the third coupling hole 121, the second coupling hole 112 and the fourth coupling hole 122 are aligned with each other, and then the screw 13 is inserted into the first and second cases 11. , 12).

Therefore, the split current transformer has a first core 21 seated in the first case 11 and a second core 22 seated in the second case 12 by tightening the screw 13 and one side thereof. It is glued on the other side.

Therefore, since the current of 30 to 100,000 A flows through the conductive wire 50 passing through the centers of the first and second cases 11 and 12, the first and second cores 21 and 22 generate magnetic flux. The coil 40 generates an excitation current according to the turns ratio. Therefore, the current 5A or 1A, which is the sum of the magnetic flux and the excitation current, is output through the first and second connection terminals 42.

As described above, in the split current transformer according to the present invention, when the primary current flowing through the conductive wire 50 is applied, magnetization force is generated according to the number of turns and the length of the winding, and the generated magnetization force is equal to the coil 40. As a winding ratio is wound around the main surface of the conductive wire 50, the problem of variation in the output current and burnout of the equipment due to the rapid saturation, which is a conventional problem, is solved.

Although the present invention has been illustrated and described with reference to certain preferred embodiments, it can be variously modified and changed without departing from the spirit or the scope of the present invention provided by the following utility model claims. Those skilled in the art can easily know that.

As described above, the split current transformer according to the present invention generates magnetization force by the number of windings when the primary current flows to the center of the current transformer, and the magnetization force generated at this time is wound around the magnetic field of the iron core evenly. The constant excitation current is maintained by the excitation voltage and the excitation voltage is also constant. Therefore, the sudden excitation current increases or the excitation voltage drops rapidly, and the excitation characteristic caused by overexcitation is not only stabilized, but also the damage caused by overexcitation is also prevented. There is.

In addition, the split-type current transformer according to the present invention is capable of repair and repair even while electricity flows through the conductive wire, thereby reducing the replacement time and reducing the cost thereof.

Claims (3)

In the split-type current transformer for converting the current amount of the conductive wire through A first case 11 protruding from one side and the other end to form first and second coupling holes 111 and 112 into which the screw 13 is inserted; Third and fourth coupling holes 112 and 122 are formed to correspond to the first and second coupling holes 111 and 112 at one side and the other end thereof, respectively, to the coupling holes 111, 112, 121 and 122. A second case 12 coupled with the first case 11 by inserting a screw 13; A first core 21 seated on the first case 11 to generate magnetic flux; A second core 22 seated on the second case 12 to generate magnetic flux; A core cap 30 formed on an outer circumferential surface of the first and second cores 21 and 22 to insulate the first and second cores 21 and 22; The first and second cores 11 and 12 are wound at a predetermined turns ratio on the first and second cores 21 and 22 so as to be drawn / retracted and connected to each other, and to the first core 21. Split current transformer, characterized in that it comprises a coil (40) is drawn out as one end of the winding and the other end of the winding to the second core (22) as a connection terminal (41, 42). The method of claim 1, wherein the first case 11 A first connection hole 113 connecting the coil 40 wound on the first core 21 and the second core 22 by being drawn / retracted from one side thereof, and the first core Split current transformer, characterized in that it comprises a first drawing hole 114, one end of the coil (40) wound on the (21) is drawn out by the connection terminal (41). The method according to claim 1 or 2, wherein the second case 12 A second connection hole 123 corresponding to the first connection hole 113 at one side and withdrawal / retraction of the coil 40 and the other end of the coil 40 wound at the second core 22 Split current transformer, characterized in that it comprises a second lead hole (124) drawn out by the connecting terminal (42).