JP5760240B2 - Plug-in distribution board - Google Patents

Description

  The present invention relates to a plug-in distribution board having means for detecting a current value flowing to a load connected to each branch breaker.

  The plug-in distribution board is a plug-in connection of multiple branch breakers to the three bus bars connected to the secondary side of the main breaker. The secondary side of each branch breaker is connected to the load circuit. ing. When it is desired to monitor the load current, it is common to attach a current transformer (CT) to each branch breaker to detect the current value flowing to the load. For example, as shown in Patent Document 1, conventionally, A current transformer was arranged on the secondary side of each branch breaker.

  However, in order to arrange each current transformer on the secondary side of the branch breaker, it is necessary for the customer to pass the wiring through the current transformer, and it takes time to connect the load to the load one by one. There was a problem. Further, when the capacity of the branch breaker is increased, the electric wire connected to the secondary side becomes thicker. In this case, there is a problem that it is necessary to form a gap for the allowable bending of the electric wire.

  It is also conceivable to incorporate a unitized current transformer into the distribution board, but branch breakers for 100V and 200V are arranged in the same distribution board, or branch breakers with different capacities are the same. In the case where it is arranged in the panel, there is a problem that it cannot be handled because it is difficult to replace the current transformer.

JP-A-6-165320

  Therefore, the object of the present invention is to solve the above-mentioned conventional problems, and it is not necessary to pass the wiring through the current transformer at the customer, and the current transformer can be replaced even when a branch breaker having a different voltage or capacity is incorporated. It is an object of the present invention to provide a plug-in distribution board that can easily detect the current value flowing through each load.

In order to solve the above problems, the present invention connects three bus bars stacked in the vertical direction to secondary terminals of the main breaker, and plugs in a number of branch breakers to these bus bars. In the plug-in distribution board, at least one of the bus bars is formed with an arm portion extending toward the primary terminal of each branch breaker , and a current transformer is disposed on these arm portions and the adjacent transformer is disposed. The flow device is characterized by being arranged stepwise in the left-right direction or the front-rear direction .

As in claim 2, the length of the arm portion is set to be twice or more the thickness of the current transformer, and adjacent current transformers can be arranged in stages in the left-right direction. Further, as in claim 3 , the bus bar interval can be increased at the current transformer installation position.

  Since the plug-in distribution board according to the present invention has a structure in which a current transformer is arranged on the primary side of each branch breaker, it is not necessary for the customer to pass wiring through the current transformer. Further, by removing the branch breaker from the bus bar, the current transformer can be easily replaced, so that it is also possible to incorporate a branch breaker having a different voltage or capacity.

  Further, since a gap is formed between the bus bar and the branch breaker, the heat dissipation area of the bus bar is increased, which is advantageous in terms of heat countermeasures. If all the three bus bars are provided with arms, the current transformer can be inserted into any pole, and the problem that only a specific pole can be inserted can be eliminated.

Moreover, since the plug-in distribution board of the present invention has a structure in which adjacent current transformers are arranged in stages in the left-right direction or the front-rear direction, a large number of current transformers can be incorporated without increasing the size of the distribution board. It becomes possible.

In the plug-in distribution board according to the second aspect, since the length of the arm portion is twice or more the thickness of the current transformer, the current transformers can be arranged in two rows in the left-right direction. A large number of current transformers can be incorporated without increasing the size of the panel.

In the plug-in distribution board according to the third aspect , since the interval between the bus bars is enlarged at the installation position of the current transformer, a large-size current transformer can be incorporated.

1 is an overall perspective view showing a first embodiment of the present invention. It is a front view of FIG. It is a bottom view of FIG. It is a perspective view which shows the relationship between a bus-bar and a current transformer. It is a side view which shows the relationship between a bus-bar and a current transformer. It is a side view which shows the relationship between the bus-bar and current transformer in the 2nd Embodiment of this invention. FIG. 7 is a front view of FIG. 6. It is a side view which shows the modification of 2nd Embodiment. It is a front view of FIG. It is a bottom view which shows 3rd Embodiment. It is a principal part expanded bottom view of FIG.

Hereinafter, preferred embodiments of the present invention will be described.
1 to 5 are views showing a first embodiment of the present invention, wherein 1 is a main breaker, 2 is three bus bars connected to the secondary side thereof via a lead bar 3, and 4 is a bus bar. A number of branch breakers arranged on both sides of the bar 2. These are housed in an electrical equipment storage box (not shown) to form a plug-in distribution board. In the present specification, the direction in which the main breaker 1 is located is referred to as “up”, both side directions of the bus bar 2 are referred to as “left and right”, and the stacking direction of the three bus bars 2 is referred to as “front-back direction”.

  The bus bar 2 is stacked in the front-rear direction at a predetermined interval. In the present embodiment, the N pole, the L1 pole, and the L2 pole are sequentially arranged from the front direction. However, it is possible to freely combine the poles such as the N pole and the L2 pole, and the L1 pole and the L2 pole. In the present embodiment, each bus bar 2 has a shape in which a large number of arm portions 5 protrude in the left-right direction. Each arm portion 5 extends in the direction of the branch breaker 4, and the connecting portion 8 at the tip thereof is formed so that the plug terminal portion 9 serving as the primary side terminal of the branch breaker 4 can be reliably plug-in connected. It is desirable to have a wide shape with the same width as the plug terminal portion 9 of the breaker 4.

  A penetrating current transformer 7 is disposed on the arm 5. That is, the arm portion 5 penetrates the central hole of the current transformer 7 and can detect the value of the current flowing through the branch breaker 4 connected to the arm portion 5. In the present embodiment, the arm portions 5 are provided on all three bus bars 2, but the arm portions 5 may be provided on at least one bus bar 2. Further, by forming the connecting portion 8 wide, it is possible to prevent the current transformer 7 from falling off by being caught by the connecting portion 8 even when the branch breaker 4 is removed even if the current transformer 7 moves in the left-right direction. It is.

  As shown in FIGS. 2 and 3, a gap corresponding to the length of the arm portion 5 is formed between the bus bar 2 and the branch breaker 4. A current transformer 7 is disposed in this gap. Further, the space increases the heat radiation area of the bus bar 2 and is advantageous for heat countermeasures. As shown in FIG. 3, in this embodiment, the length of the arm portion 5 is set to be twice or more the thickness of the current transformer 7 so that the current transformers 7 can be arranged in two rows in the left-right direction. In this way, if the gap between the upper and lower adjacent arm portions 5 and 5 is slightly larger than the difference between the outer diameter and inner diameter of the current transformer 7, as shown in FIGS. It becomes possible to arrange a large number of current transformers 7 in a left and right zigzag manner. However, it is only necessary to shift the arrangement in the left-right direction, and the arrangement is not necessarily limited to the staggered arrangement. When a large number of current transformers 7 are arranged in a row, the pitch of the arm portions 5 and 5 must be equal to or greater than the outer diameter of the current transformer 7, and the vertical length of the distribution board increases. The pitch of the arm portions 5 and 5 can be reduced by the step arrangement, and the length of the distribution board in the vertical direction can be shortened.

  Further, the current transformer 7 may not be formed so as to correspond to all the branch breakers 4. It may be provided only in any one of the adjacent branch breakers 4.

  With such a structure, the current transformer 7 can be attached at the time of shipment from the factory, so that the customer does not need to perform wiring to the current transformer 7. For this reason, wiring on the secondary side of the branch breaker 4 is facilitated, and it is also possible to deal with branch breakers having different electric wires depending on the capacity of the branch breaker 4.

6 to 9 are views showing a second embodiment of the present invention.
In the first embodiment described above, a large number of current transformers 7 are arranged in a zigzag shape on the left and right sides, but the second embodiment is arranged in a staggered manner by shifting in the front-rear direction. Unlike the first embodiment, the order of insertion from the first-stage arm section 5 to the third-stage arm section 5 is not particularly limited.

  This embodiment can be used, for example, when the 100V branch breaker and the 200V branch breaker are adjacent to each other. For example, the current can be detected by measuring the N pole for the 100V branch breaker and the L1 pole for the 200V branch breaker. In this case, it is necessary to provide the arm portions 5 on at least two of the bus bars 2 formed vertically.

  By adopting such a structure, wiring on the secondary side of the branch breaker 4 is facilitated as in the first embodiment. Moreover, since the length of the arm part 5 should just be set to the thickness of at least 1 of the current transformer 7, the width | variety of the left-right direction can be comprised short.

  Also, as shown in FIG. 8 and FIG. 9, if the arm portion 5 has two stages and the length is equal to two current transformers 7, when using the N pole and the L1 pole, the variable inserted in the N pole is used. When the flow device 7 is large, it is possible to dispose it in the front-rear and left-right directions.

  In this embodiment, the current transformer 7 is formed so as to be staggered when viewed from the side with the L1 pole, the N pole, and the L1 pole in order, but like the N pole, the L1 pole, the N pole, and the N pole. It can also be arranged in stages. As shown in the embodiments up to now, the position of the current transformer 7 can be freely changed without changing the shape of the distribution board by forming the arm portion 5 in the left-right direction from the bus bar 2 as described above. It is.

10 and 11 are views showing a third embodiment of the present invention.
In this embodiment, the space | interval of the front-back direction of the 2nd step | paragraph and the 3rd step | paragraph is widely formed among the bus-bar 2 stacked in the upper and lower 3 steps | paragraphs. That is, the middle of the arm portion 5 formed on the third-stage bus bar 2 is bent in the direction of the plug terminal 9 of the branch breaker 4, and only the third-stage bus bar 2 is formed in a dish shape. Thus, the current transformer 7 is installed in the place formed deeply in the front-rear direction in the arm portion 5. The first stage, the second stage, the second stage, and the third stage in the vicinity of the plug terminal portion 9 that becomes the primary side terminal of the branch breaker 4 are formed in the same manner. Moreover, the structure which forms a recessed part only in a current transformer installation place as structures other than this embodiment may be sufficient. By adopting such a structure, it becomes possible to cope with the size of the current transformer, and it is not necessary to change the shape of the branch breaker. In this embodiment, only the second stage and the third stage are formed wide, but the second stage arm part is also bent and the first stage bus bar 2 and the second stage are formed. The space with the bus bar 2 can be made large.

  In the third embodiment, the N pole (front pole, first stage pole) is formed of a flat plate that does not form the arm portion 5. If the arm portions 5 are formed on all the bus bars 2, the current transformer 7 is exposed on the surface, so that the appearance is deteriorated. However, by forming the front bus bar 2 on a flat plate as in the third embodiment. , The appearance will be better. In addition, since the heat radiation area is increased as in the conventional case, it can be used as a heat radiation portion. In other embodiments as well, it goes without saying that the current transformers 7 can be arranged in stages on the L1 pole and the L2 pole of the bus bar 2 with the front face as a flat plate.

  As described above, the plug-in distribution board of the present invention does not require the work of passing the wiring through the current transformer at the customer site, and even when a branch breaker having a different voltage or capacity is incorporated. There are many advantages such as easy replacement and the ability to accurately detect the current value flowing through each load.

1 Master Breaker 2 Bus Bar 3 Lead Bar 4 Branch Breaker 5 Arm 7 Current Transformer 8 Connection 9 Plug Terminal

Claims (3)

In a plug-in distribution board in which three bus bars stacked in the vertical direction are connected to secondary terminals of the main breaker, and a number of branch breakers are plug-in connected to these bus bars, at least one of the bus bars arms extending toward the primary-side terminals of the branch breakers are formed in this that places the current transformer to these arms, and the adjacent current transformer which was stage arranged in the lateral direction or longitudinal direction Plug-in distribution board characterized by 2. The plug-in distribution board according to claim 1, wherein the length of the arm portion is at least twice the thickness of the current transformer, and adjacent current transformers are arranged stepwise in the left-right direction. 2. The plug-in distribution board according to claim 1, wherein the interval between the bus bars is increased at a position where the current transformer is installed.

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