JP2011036050A - Distribution panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distribution panel having less time and effort for attaching a current sensor in installation, and capable of improving reliability of a current value to be detected with the current sensor. <P>SOLUTION: The distribution panel 1 includes a trunk breaker 4, a plurality of branch breakers 5, a connection 6, a plurality of current sensors 7 and a box 2 for housing them. The connection 6 includes trunk and branch bars 61, 62 as conductive bars formed like a strip made of a conductive material. The trunk bar 61 has one end of a longitudinal direction, which is connected to a secondary terminal 42 of the trunk breaker 4. The branch bars 62 extend from the trunk bars 61, respectively, and each have one end of the longitudinal direction, which is connected to a primary terminal 51 of the branch breaker 5. The current sensor 7 has a circular magnetic core 71, a secondary coil (not shown) wound around the magnetic core 71 and a case 72 having substantially the same shape as the magnetic core 71 and housing them into the inside. The current sensor 7 is fixed to the trunk bar 61 or the branch bars 62 while the trunk bar 61 or the branch bars 62 penetrate a window hole 71a of the magnetic core 71. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a distribution board provided with a current sensor for detecting a current value flowing through a breaker.

Conventionally, a main breaker provided on the main road, a plurality of branch breakers provided on a branch road branched from the main road, and a connecting portion formed of a conductive material and electrically connecting the main breaker and the plurality of branch breakers, Various distribution boards having a box for storing them inside are provided. Here, the connecting portion is formed of a conductive bar which is formed in a strip shape and has one end in the longitudinal direction connected to the secondary terminal of the main breaker.

And such a distribution board is a current sensor that detects the value of the current flowing through the main breaker and the branch breaker in order to measure the power value of each branch system branched from the main road and supplied to various load devices ( A current transformer is attached. Hereinafter, the current sensor will be briefly described. The current sensor includes an annular magnetic core, a secondary coil wound around the magnetic core, and a case having substantially the same shape as the magnetic core and housing the magnetic core and the secondary coil therein, and current flows through the window hole of the magnetic core. By being attached to the power line in a state where the power line (electric circuit) penetrates, the magnetic circuit is arranged so as to surround the electric circuit in the circumferential direction. The magnetic flux generated in the circumferential direction of the electric circuit is bundled by the magnetic core, and a current is induced in the secondary coil by the change of the magnetic flux interlinking with the secondary coil. Both end portions of the secondary coil are electrically connected to, for example, a current meter through a lead wire, and the current value induced in the secondary coil by the current meter is the number of turns of the secondary coil, the cross-sectional area of the magnetic core, etc. Is converted into a current value actually flowing through the electric circuit. Such a current sensor is used to connect a power line connecting the primary terminal of the main breaker and the commercial power source or a power line connecting the secondary terminal of the branch breaker and the load device during the construction work of the distribution board. Mounted individually.

By the way, the number of current sensors installed at the time of distribution board installation is proportional to the number of branch breakers in the distribution board. If the distribution board is a single-phase three-wire system, two currents per branch breaker are used. A sensor will be installed. Therefore, for example, if the number of branch breakers is eight, it is necessary to install as many as sixteen current sensors, so that there is a problem that it takes a lot of time and effort and the workability is poor.

On the other hand, conventionally, a sensor block in which a large number of current sensors are integrally arranged is provided, and the sensor block is placed in a box with the conductive bars individually penetrating through the magnetic core windows arranged in a horizontal row. Thus, there is provided a distribution board that reduces the time and effort required to individually attach current sensors during construction of the distribution board (see Patent Document 1).

JP 2007-228734 A

However, in the distribution board described in Patent Document 1, since a large number of current sensors are integrally arranged as a sensor block, a current value flowing in one conductive bar, for example, flows to another conductive bar during construction. Even if it is relatively larger than the current value and exceeds the rated current of the installed current sensor, even if you want to change only the current sensor to a current sensor with a rated current according to the conductive bar, change It was difficult. Therefore, a current sensor having an inappropriate rated current remains installed, and there is a possibility that the value of the current flowing through the conductive bar cannot be accurately detected.

The present invention has been made in view of the above-mentioned reasons, and its purpose is a distribution board that can reduce the trouble of mounting a current sensor during construction and can improve the reliability of a current value detected by the current sensor. Is to provide.

In order to achieve the above object, a first aspect of the present invention provides a main breaker, a plurality of branch breakers, a connection portion formed of a conductive material and electrically connecting the main breaker and the plurality of branch breakers, and a connection portion. A plurality of current sensors that are arranged integrally with each other and detect a current value flowing through the connecting portion;
And a box that houses them inside, the connection portion is formed of a conductive bar that is formed in a strip shape and one end in the longitudinal direction is connected to the secondary terminal of the main breaker, and the current sensor is An annular magnetic core, a secondary coil wound around the magnetic core, a case having substantially the same shape as the magnetic core and housing the magnetic core and the secondary coil therein, and a conductive bar penetrating through the window hole of the annular magnetic core In this state, the bar is fixed to the bar.

According to this invention, the current sensor is fixed to the bar in a state where the conductive bar penetrates through the window hole of the magnetic core. Therefore, when the distribution board is installed, the conductive bar integrated with the current sensor is connected to each breaker. The current sensor can be easily changed together with the conductive bar. In addition, the current value flowing through the conductive bar is the current sensor unless the conductive bar connected to each breaker at the time of installation of the distribution board is fixed by combining and fixing the conductive bar and current sensor having substantially the same rated current in advance. Never exceed the rated current. Therefore, it is possible to improve the reliability of the current value detected by the current sensor with less labor for attaching the current sensor during construction.

According to a second aspect of the present invention, in the first aspect of the present invention, the conductive bar is formed asymmetrically from the center in the longitudinal direction to both ends.

According to the present invention, it is possible to provide a guideline for connecting the conductive bar and each breaker while directing the current sensor in a predetermined correct direction with respect to the energization direction.

According to a third aspect of the present invention, in the first or second aspect of the invention, the magnetic core includes a pair of magnetic cores formed in a substantially U shape, and the case includes a first, And a second case and a fixing means for fixing the first and second cases at a position where the end faces of the magnetic core contact each other. The current sensor includes a conductive bar in the first and second cases. It is characterized by being pinched and fixed to the bar.

According to this invention, the current sensor can be fixed to the conductive bar more easily than, for example, by press-fitting from one end portion in the longitudinal direction of the bar, so that the workability is excellent.

According to a fourth aspect of the present invention, in the third aspect of the invention, the conductive bar and the first case or the second case contacting the bar are provided with engaging means for engaging each other in the longitudinal direction of the bar. The at least two engaging means are formed in different shapes or dimensions from each other.

According to the present invention, the direction of the current sensor with respect to the conductive bar is uniquely determined by the two engaging means, and the first case or the second case can be temporarily fixed to the bar. Are better.

According to the present invention, there is an effect that it is possible to improve the reliability of the current value detected by the current sensor with less labor for attaching the current sensor during construction.

It is a front view of Embodiment 1 of the present invention. It is a top view of the branch bar and current sensor in the same as the above, (a) is a front view, (b) is a left side view, (c) is a bottom view. It is a bottom view of the current sensor of Embodiment 2 of the present invention. It is a front view of the 1st case in the same as the above. It is a front view of the branch bar in the same as the above. It is a top view of the branch bar and 1st case in the same as the above, (a) is a front view, (b) is a left view, (c) is a bottom view. It is a top view of the branch bar and current sensor in the same as the above, (a) is a front view, (b) is a left side view, (c) is a bottom view.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. In the following description, unless otherwise specified, the vertical and horizontal directions in FIG. 1 are defined, and the front of FIG. As shown in FIG. 1, the distribution board 1 of the present embodiment includes a mounting frame 3, a main breaker 4, a plurality of branch breakers 5 (two are shown in FIG. 1), a connection portion 6, and a plurality of A current sensor 7 (six are shown in FIG. 1) and a box 2 for storing them are provided.

As shown in FIG. 1, the box 2 includes a vertically long rectangular plate-like back plate 21, a frame 22 attached to the outer edge of the back plate 21, and a lid (not shown) attached to the front of the frame 22 so as to be freely opened and closed. It consists of a board. A wiring insertion hole (not shown) through which a power line (not shown) connected to a commercial power source (not shown) is introduced is provided in the upper end surface of the frame body 22.

As shown in FIG. 1, the attachment frame 3 includes elongated rectangular plate-like crosspieces 31 and 31 and a plurality of substrates 32. The crosspieces 31 and 31 have insertion holes (not shown) penetrating at both ends in the longitudinal direction, and a number of screw holes 31a are formed in a row in the vertical direction between the insertion holes at both ends. Then, the four attachment screws 8 inserted through the insertion holes are screwed into screw holes (not shown) drilled at the four corners of the back plate 21 so that the crosspieces 31 and 31 are attached to the box 2. It is done.

Each of the substrates 32 is formed in a rectangular plate shape, and a pair of insertion holes 32d are provided at both left and right ends thereof.
Is penetrated. Moreover, the board | substrate 32 has two small board | substrates 32 by the difference in the dimension of a vertical direction mutually.
A is divided into two medium substrates 32b and one large substrate 32c. On the other hand, the horizontal dimensions of each substrate 32 are all equal between the crosspieces 31 and 31, and the screws 9 inserted into the insertion holes 32d are screwed into screw holes 31a appropriately selected from among a large number. , Each substrate 32 is a crosspiece 31, 3
1 is attached.

The main breaker 4 and the branch breakers 5 and 5 are the same as those provided in a general distribution board. That is, the main breaker 4 is a leakage breaker, and includes a blocking mechanism that cuts off the main path from a conductive state to a non-conductive state when a leakage is detected. The branch breakers 5 and 5 include a shut-off mechanism that shuts off each branch path when an overcurrent such as a short circuit current or an overload current in each branch path is detected.

As shown in FIG. 1, the main breaker 4 has three primary terminals 41 at the upper end and the lower end, respectively.
And the three secondary terminals 42 are juxtaposed and placed on the left part of the large substrate 32c arranged slightly above the center in the vertical direction of the crosspieces 31 and 31. The distribution board 1 is a single-phase three-wire system, and three power lines (one neutral line and two voltage lines) (not shown) introduced into the box 2 are the three primary lines of the main breaker 4. Connected to the side terminal 41.

As shown in FIG. 1, the branch breakers 5, 5 have three primary terminals 51 and three secondary terminals 52 arranged in parallel at the left end and the right end, respectively, One is placed on each of the central portions of the middle substrates 32b and 32b that are continuously arranged slightly downward.

As shown in FIG. 1, the connecting portion 6 is formed of a conductive bar that is formed in an elongated strip shape using a conductive material and electrically connects the main breaker 4 and the branch breakers 5, 5. It consists of three main bars 61 and six branch bars 62. However, the conductive bar is not limited to this, and may be composed only of a main bar, for example. In the main bar 61 and the branch bar 62, a current sensor 7 for detecting the value of the current flowing in each bar 61, 62 is provided integrally with each bar 61, 62. However, the current sensors 7 are not arranged in all the main bars 61 and the branch bars 62. As shown in FIG.
Arranged except for 62M. Details of the current sensor 7 will be described later.

As shown in FIG. 1, the main bar 61 is formed in an elongated strip shape with a conductive material, and is disposed with its longitudinal direction directed in the vertical direction. Connection holes (not shown) are provided in the upper end portion of the main bar 61, and small holes 61a and large holes 61 having different inner diameters are formed in the lower end portion and the lower portion of the connection holes.
b is penetrated. Further, the insertion hole 61 is formed in the upper part of the small hole 61a and the lower part of the large hole 61b, respectively.
c is penetrated. The main bar 61 is screwed to the left part of the small boards 32a and 32a disposed near the central part and the lower end part in the vertical direction of the crosspieces 31 and 31, respectively. That is, the screws 10 inserted through the insertion holes 61c are screwed into screw holes (not shown) formed in the small substrates 32a and 32a, respectively, so that the three main bars 61 are aligned in the left-right direction and are attached to the mounting frame. 3 is attached.

Further, the main bar 61 is connected to the secondary terminal 42 of the main breaker 4 by screwing through the connection hole penetrating the upper end portion. The three main bars 61 arranged side by side in the left-right direction correspond to the polarities of the three power lines connected to the three primary terminals 41 of the main breaker 4, and the central main bar 61 is neutral. The pole bar 61M and the two left and right main bars 61 are voltage pole bars 61L and 61N.

Further, the main bar 61 is provided with three screw holes 61d at approximately equal intervals between the two insertion holes 61c described above. However, the position of the screw hole 61d is compared with the other adjacent main bar 61, as shown in FIG. 1, from the left voltage pole bar 61L to the central neutral pole bar 61M, the right voltage pole bar. As it moves to 61N, it is shifted slightly downward.

As shown in FIG. 1, the branch bars 62 are formed in a strip-like plate shape with a conductive material, and extend from the main bar 61 with the longitudinal direction thereof directed in the left-right direction. A connecting hole 62a (not shown in FIG. 1) is provided in the right end portion of the branch bar 62, and is connected to the primary terminal 51 of the branch breaker 5 by screws through the connection hole 62a. On the other hand, screw holes 62b (not shown in FIG. 1) are formed at the left end, and six screws 11 inserted through the screw holes 62b are screwed into the screw holes 61d of the main bar 61, respectively. Branch bars 62 are arranged in the vertical direction. That is, 6
The three main bars 61 arranged in parallel in the left-right direction and the primary terminals 51 of the two branch breakers 5 and 5 are electrically connected to each other through the two branch bars 62. The three branch bars 62 connected to one branch breaker 5 include a neutral pole bar 61M of the main bar 61 and a voltage pole bar 6
Corresponding to each polarity of 1L and 61N, the central branch bar 62 is a neutral pole bar 62M,
The two branch bars 62 are referred to as voltage pole bars 62L and 62N.

The distance from the primary terminal 51 of the branch breaker 5 to the three main bars 61 to be connected is shown in FIG.
As shown in FIG. 4, since the voltage pole bar 61N, the neutral pole bar 61M, and the voltage pole bar 61L are separated in this order, the horizontal dimension of the three branch bars 62 corresponds to the distance, and the voltage pole bar 6
2N, the neutral electrode bar 62M, and the voltage electrode bar 62L are set longer in this order.

Further, in order to prevent the three branch bars 62 from coming into contact with the main bar 61 other than the main bar 61 to be screwed (for example, the neutral pole bar 61M and the voltage pole 6L of the voltage pole bar 62L).
1N), the three secondary terminals 42 of the main breaker 4 are arranged so that the height positions in the front-rear direction of the main breaker 4 become lower in order from the left, while the three primary terminals of the branch breaker 5 5
Similarly, No. 1 is arranged such that the height position in the front-rear direction decreases in order from above.

Next, the current sensor 7 fixed to the branch bar 62 will be described with reference to FIG.
However, in the following description, the vertical and horizontal directions are defined in FIG. 2A, and the front of FIG. Further, the branch bar 62 in FIG. 2 is not yet arranged in the distribution board 1, and the connection hole 62a located at the right end in FIG. 1 is located at the lower end in FIG. To do.

As shown in FIG. 2, the current sensor 7 includes an annular magnetic core 71, a secondary coil (not shown) wound around the magnetic core 71, and the magnetic core 71 and the secondary coil having substantially the same shape as the magnetic core 71. And a case 72 for storing the inside. The magnetic core 71 is formed in a substantially square shape by a magnetic material. The secondary coil is formed by winding, for example, a round wire conductor in the circumferential direction of the front portion of the magnetic core 71 via a coil bobbin (not shown) formed of a synthetic resin material that is sheathed on the magnetic core 71. The case 72 is formed in a substantially rectangular tube shape as a whole by an insulating material, and the window hole 7 of the magnetic core 71 accommodated therein.
An insertion portion 72a penetrating in the vertical direction along 1a is provided. The insertion part 72a is shown in FIG.
As shown in (c), it is formed in substantially the same shape as the lower end surface of the branch bar 62. Both end portions of the secondary coil are connected to one end portion of the lead wire 12 in the case 72, and are electrically connected to a current meter (not shown) via the lead wire 12 led out from the case 72. .

In the current sensor 7, as shown in FIG. 2, the branch bar 62 is press-fitted into the insertion portion 72 a of the case 72 along the longitudinal direction, and the branch bar 62 penetrates the window hole 71 a of the annular magnetic core 71. To fix the bar. That is, the distribution board 1 of the present embodiment only needs to connect the branch bar 62 in which the current sensor 7 is integrated to the branch breaker 5 at the time of construction, and the change of the current sensor 7 can be easily performed together with the branch bar 62. . Moreover, unless the branch bar 62 connected to the branch breaker 5 at the time of construction of the distribution board 1 is not mistaken by fixing the branch bar 62 and the current sensor 7 which are substantially equal in rated current to each other in advance, the branch bar 62 is used. The current value flowing through the current sensor 7 does not exceed the rated current of the current sensor 7. Therefore, it is possible to improve the reliability of the current value detected by the current sensor 7 with less labor for attaching the current sensor 7 during construction. In the above description, the example in which the current sensor 7 is fixed to the branch bar 62 has been described. However, the same effect can be obtained when the current sensor 7 is fixed to the main bar 61.

By the way, when the current sensor 7 is attached to the electric circuit, a correct direction is determined in advance with respect to the energization direction. When the main bar 61 or the branch bar 62 to which the current sensor 7 is fixed is connected to the breakers 4 and 5, the current sensor 7 corresponds to the energization direction of the current that actually flows through the main bar 61 or the branch bar 62. If the direction is incorrect, the current value is measured as a negative value by the ammeter.

However, as described above, the main bar 61 of the present embodiment has small holes 61a having different inner diameters.
A large hole 61b is provided (see FIG. 1). For example, the main bar 6 to which the current sensor 7 is fixed
1 is the direction from the large hole 61b to the small hole 61a with respect to the longitudinal direction of the main bar 61, the large hole 61b and the small hole 61a are visually observed during construction.
If the b side is directed to the secondary terminal 42 of the main breaker 4, a correct connection can be made. Accordingly, the main bar 61 is directed while the current sensor 7 is directed in a predetermined correct direction with respect to the energization direction.
And the main breaker 61 can be used as a guide.

Further, instead of newly providing the small hole 61a and the large hole 61b as in the main bar 61 described above, the inner diameter of the connection hole 62a and the screw hole 62b is different from each other as in the branch bar 62 shown in FIG. They may be provided differently.

(Embodiment 2)
Hereinafter, Embodiment 2 of the present invention will be described with reference to FIGS. Since the basic configuration of this embodiment is the same as that of the first embodiment, common components are denoted by the same reference numerals and description thereof is omitted. In the following description, the vertical and horizontal directions are defined in FIG.
Description will be made with the front of FIG. Further, the branch bar 62 shown in FIGS.
Are not arranged in the distribution board 1 yet, and the connection hole 62a located at the right end in FIG. 1 is located at the lower end in FIGS.

The current sensor 7 of the present embodiment is characterized in that it is a split-type current sensor 7 including a pair of magnetic cores 13 and 13 formed in a substantially U shape.

As shown in FIG. 3, the current sensor 7 includes magnetic cores 13, 13 and first and second cases 14.
, 15 and fixing means. The first and second cases 14 and 15 have magnetic cores 13 and 13.
The magnetic cores 13 and 13 are accommodated so that the end faces 13a and 13a are exposed to the outside. Further, as shown in FIGS. 3 and 4, the first case 14 has a magnetic core 1.
Convex portions 14b and 14c projecting inward while being flush with the front end portion 14a are respectively disposed on the upper and lower portions of the front end portions 14a and 14a exposing the third portion. However, the dimension of the protrusion 14c in the protruding direction is set longer than that of the protrusion 14b as shown in FIG.

As shown in FIG. 3, the bearing portion 16 and the shaft center portion 17 that are fixing means are disposed on the right wall portions of the first and second cases 14 and 15 so as to face each other. And the axial center part 17 is pivotally supported by the bearing part 16, and the 1st and 2nd cases 14 and 15 are between the positions where the end surfaces 13a and 13a of the magnetic cores 13 and 13 contact | abut / separate. It is held rotatably.

Similarly, an engaging claw (not shown) and an engaging groove (not shown), which are fixing means, are first and second.
Of the cases 14 and 15 are arranged to face each other. And the magnetic cores 13 and 13
When the engaging claw and the engaging groove are engaged at a position where the first and second cases 14 and 15 come into contact with each other, the rotation of the first and second cases 14 and 15 is restricted.

Further, as shown in FIG. 5, the branch bar 62 of the present embodiment is provided with grooves 18 and 19 for engaging with the protrusions 14 b and 14 c of the first case 14 described above. Groove 18
, 19 are arranged along the longitudinal direction at both left and right end portions closer to the connection hole 62a than the central portion in the longitudinal direction of the branch bar 62, and are formed inwardly from the front end portion to the rear end portion of the branch bar 62. Is done. However, the recess dimension of the groove part 19 is set longer than the groove part 18 as shown in FIG.

Hereinafter, a procedure for fixing the current sensor 7 to the branch bar 62 will be briefly described. First, the first and second cases 14 and 15 are rotated to a position where the end faces 13a and 13a of the magnetic cores 13 and 13 are separated from each other. Next, the branch bar 62 is interposed between the first and second cases 14 and 15 so that the grooves 18 and 19 and the protrusions 14b and 14c are engaged from the front of the first case 14. Insert backwards to face each other. Thereby, as shown in FIG. 6, the branch bar 62 is temporarily fixed to the first case 14. Then, the end surfaces 13a and 13a of the magnetic cores 13 and 13 are rotated while the second case 15 is rotated and the branch bars 62 are held between the first and second cases 14 and 15.
As shown in FIG. 7, the current sensor 7 is fixed to the branch bar 62 by engaging the engagement claw and the engagement groove at a position where they come into contact with each other.

Accordingly, in the distribution board 1 of the present embodiment, the current sensor 7 can be fixed to the branch bar 62 and the main bar 61 more easily than, for example, by press-fitting from one end in the longitudinal direction of the bar. Excellent in properties. In the above description, the example in which the current sensor 7 is fixed to the branch bar 62 has been described. However, the same effect can be obtained when the current sensor 7 is fixed to the main bar 61.

Incidentally, as described above, the current sensor 7 and the branch bar 62 are provided with the groove portions 18 and 19 having different recess dimensions and the protrusion portions 14b and 14c having different protrusion sizes as engaging means. Therefore, the direction of the current sensor 7 relative to the branch bar 62 is uniquely determined,
The first case 14 can be temporarily fixed to the bar, and the workability is excellent.

In particular, as described in the first embodiment, the connection hole 62a and the screw hole 62b of the branch bar 62 are provided so that the inner diameters thereof are different from each other, so that the grooves 18 and 19 and the protrusions 14b and 14c are engaged. If the current sensor 7 is set so as to be in the correct direction with respect to the energization direction (direction from the connection hole 62a to the screw hole 62b), it is not necessary to be aware of the direction of the current sensor 7 during construction. The large connection hole 62a may be connected to the primary terminal 51 of the branch breaker 5.

DESCRIPTION OF SYMBOLS 1 Distribution board 2 Box 4 Main breaker 5 Branch breaker 6 Connection part 7 Current sensor 41 Primary side terminal 42 Secondary side terminal 51 Primary side terminal 52 Secondary side terminal 61 Main bar 62 Branch bar 71 Magnetic core 71a Window hole 72 Case

Claims (4)

A main breaker, a plurality of branch breakers, a connection portion that is formed of a conductive material and electrically connects the main breaker and the plurality of branch breakers, and a current value that flows through the connection portion is integrated with the connection portion. A plurality of current sensors and a box for storing them inside are provided.
The connecting portion is formed of a conductive bar formed in a strip shape and having one end in the longitudinal direction connected to the secondary side terminal of the main breaker,
The current sensor includes an annular magnetic core, a secondary coil wound around the magnetic core, and a case having substantially the same shape as the magnetic core and accommodating the magnetic core and the secondary coil therein, and is provided in a window hole of the annular magnetic core. A distribution board, wherein the conductive bar is fixed to the bar in a state where the bar penetrates. 2. The distribution board according to claim 1, wherein the conductive bar is formed asymmetrically from the center portion in the longitudinal direction to both end portions. The magnetic core consists of a pair of magnetic cores formed in a substantially U shape,
The case includes first and second cases each housing a pair of magnetic cores, and fixing means for fixing the first and second cases at positions where the end surfaces of the magnetic cores are in contact with each other,
The distribution board according to claim 1 or 2, wherein the first and second cases sandwich the conductive bar and the current sensor is fixed to the bar. The first case or the second case that contacts the conductive bar and the second case are provided with at least two engaging means for engaging with each other along the longitudinal direction of the bar. 4. The distribution board according to claim 3, wherein the means are formed in different shapes or dimensions.

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