JP2005110433A - Distribution board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distribution board wherein, even if a main breaker for primary feed is used, the size of a case body is not increased and the versatility can be enhanced. <P>SOLUTION: The main breaker 7 for primary feed is so disposed that it is connected with either primary feed branch breaker disposing portion 97 of a primary feed conductive bar group 9. At the same time, it is connected with the primary terminal portion 42 of a main breaker 4 through wires 44, 44, 44. Therefore, the main breaker 7 for primary feed can be installed without unnecessarily increasing the size of a chassis 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a distribution board using a primary feed branch breaker.

  Conventionally, in a single-phase three-wire distribution board, for example, one neutral bar conductive bar and two voltage pole conductive bars are used, and these three conductive bars are separated from each other. In addition, each conductive bar is attached to one end of each conductive bar with a screw, and connected to the conductive bar along both sides of the conductive bar. It is known that these branch breakers are electrically connected.

  In addition, when equipped with equipment such as automatic fire alarms and emergency intercoms, the equipment is equipped with a primary feed circuit and a primary feed conductive bar group for wiring from the primary side of the main breaker without passing through the main breaker. In some cases, a distribution board is used in which a primary feed branch breaker is provided to the primary feed conductive bar group.

  With respect to such a structure, the applicant has already filed a structure suitable for having the above-described conductive bar structure and capable of providing a primary feed circuit by effectively utilizing the empty space in the distribution board. (See Patent Document 1).

  In a distribution board having such a primary feed branch breaker, for example, when three or more primary feed branch breakers are provided, a primary feed main breaker may be used.

  That is, each of the three primary feed conductive bars has an allowable current, and if the current exceeding the allowable current flows to the conductive bar, there is a possibility that the conductive bar or the distribution board may be protected. When it exceeds, it is necessary to cut off the current.

  Under these conditions, when two primary feed branch breakers are provided in the primary feed conductive bar group, one neutral pole conductive bar and one voltage pole bar, and one neutral One electrode may be provided for the electrode conductive bar and the other voltage electrode bar. Therefore, in such a case, since each load current flows only through each primary feed branch breaker in each voltage pole bar, there is almost no possibility that a current exceeding the allowable current flows in each conductive bar. Only the rated capacity of each branch breaker can be used.

  However, when three or more primary feed branch breakers are provided, since at least one voltage pole bar is provided with two or more primary feed branch breakers, a conductive bar provided with a plurality of primary feed branch breakers is provided. A load current corresponding to the connected load flows through. Then, for example, when the allowable current of one conductive bar is 30 A, one load that is primarily sent is 18 A, and a side-by-side load of the same phase (one conductive bar) also flows 18 A. One conductive bar will flow 30 A or more, which will exceed the allowable current of the conductive bar. Therefore, since the rated capacity of the branch breaker is usually smaller than the allowable current of the conductive bar, in such a case, by providing a primary feed main breaker with a larger rated capacity than the primary feed branch breaker, the rated current exceeds the allowable current. When current is used, it is interrupted by the primary feed main breaker to protect the conductive bar.

  FIG. 6 shows an example of the configuration in which the primary feed main breaker is provided as described above.

  The distribution board 10 ′ includes a chassis 1, a cover 2, a main breaker 4, ten branch breakers 5, four primary feed branch breakers 6, a primary feed main breaker 7 ′, and the like, which are case bodies. .

The chassis 1 and the cover 2 are provided with a main breaker 4, a branch breaker 5, a primary breaker breaker 6, a main breaker space 1 A provided with a limiter, a branch / primary feed branch breaker space 1 B, and a limiter space 1 C. Yes. A free space 1D is provided on one side of the branch / primary feed branch breaker space 1B, and a primary feed main breaker 7 is provided in the free space 1D.
Japanese Patent Application No. 2002-285444 (Figs. 3, 4 etc.)

  However, with the arrangement as described above, since the primary feed main breaker 7 'is provided in the free space 1D, there is a problem that the chassis 1 is increased in size.

  On the other hand, when the primary feed main breaker 7 'is provided in the free space 1D, there is a problem that other devices cannot be provided in the free space 1D, and the versatility as a distribution board may be reduced. .

  The present invention has been made in view of the above points, and provides a distribution board that does not increase the size of a case body even when a primary feed main breaker is used and can improve versatility. With the goal.

  The distribution board according to claim 1 comprises: a case main body; and a plurality of conductive bars provided with a plurality of branch breaker connection portions in a direction perpendicular to the longitudinal direction, and a conductive bar group provided on the case main body; A main breaker provided in the case body connected to one end of the conductive bar group; a plurality of branch breakers arranged and connected to the side of the branch breaker connecting portion of the conductive bar group; A primary feed conductive bar group provided on the case body so as to face the other end of the conductive bar group; and a plurality of primary feed branch breaker arrangement parts in a vertical direction; And at least three or more primary feed branch breakers provided; larger than the primary feed branch breaker body and in contact with one primary feed branch breaker arrangement portion of the primary feed conductive bar group. Together are placed, a main breaker for primary feed is also connected to primary side of the main breaker; characterized by comprising a.

  According to the first aspect of the present invention, there is provided a main breaker, a conductive bar group in which the secondary side of the main breaker and one end are connected, and a primary feed conductive bar group opposed to the other end of the conductive bar group. Is provided on the case body. A plurality of branch breakers are provided as appropriate to the branch breaker connecting portions of the conductive bar group.

  A primary feed main breaker for the primary feed conductive bar group is provided on one side of the primary feed branch breaker arrangement portion, and at least three primary feed branch breakers are appropriately provided in the remaining primary feed branch breaker arrangement portion.

  According to the present invention, the primary breaker main breaker is connected to the primary feed branch breaker arrangement portion of the primary feed conductive bar group and also connected to the temporary side of the main breaker, so that the case body is unnecessarily large. Even if the size is not increased, a primary feed main breaker can be provided. In addition, it is not necessary to provide a primary feed main breaker in the free space of the case body, and other devices can be provided in the free space, so that even a distribution board having a primary feed main breaker can improve versatility. Can do.

  According to the first aspect of the present invention, since the primary feed main breaker is connected to the primary feed branch breaker arrangement portion of one of the primary feed conductive bar groups and is also connected to the temporary side of the main breaker, the case body The main breaker for primary feeding can be provided even if the size is not increased more than necessary. In addition, it is not necessary to provide a primary feed main breaker in the free space of the case body, and other devices can be provided in the free space, so that even a distribution board having a primary feed main breaker can improve versatility. Can do.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is a front view showing a distribution board of the present embodiment, FIG. 2 is a right side view of the distribution board of FIG. 1, and FIG. 3 is a front view of the distribution board 'of FIG. FIG.

  The distribution board 10 includes a chassis 1, a cover 2, a door 3, a main breaker 4, a branch breaker 5, a primary feed branch breaker 6, a primary feed main breaker 7, and the like which are case bodies.

  The base 1 is formed by molding a synthetic resin, has a thin box shape with an opening opened on the front surface, and a limiter knockout portion (a limiter knockout portion is a limiter knockout portion). It is configured so that it can be knocked out according to different sizes depending on the current capacity and power company.), 20 main breakers 4 and 20 branch breakers 5 can be arranged in two rows at the top and bottom. It has a certain size.

  The cover 2 is formed by molding a synthetic resin, and covers the opening of the base 1 except for the operation parts 41 and 51 of necessary devices such as a main breaker 4 and a branch breaker 5 described later, A limiter cover 21, a main breaker cover 22, and a branch breaker cover 23 are provided so as not to be exposed.

  Further, the cover 2 is detachably disposed on the front surface of the base 1, but a load display portion 24 is formed so that the branch circuit name or the main electric load name thereof can be displayed.

  The chassis 1 and the cover 2 provide a main breaker space 1A, a branch / primary feed branch breaker space 1B, and a limiter space 1C.

  The door 3 covers the front surface of the cover 2 so that both sides of the upper side are pivotally supported on the cover 2, and the door 3 is locked to a door locking locking portion (not shown) when the cover 2 is covered.

  As shown in FIG. 3, the main breaker 4 is composed of an earth leakage breaker in which an operation unit 41 that switches a switch by a swing operation is provided on the front surface.

  As shown in FIG. 3, the branch breaker 5 is a circuit breaker for wiring in which an operation unit 51 for switching a switch by a swinging operation is provided on the front surface.

  Further, a total of 10 branch breakers 5 are arranged in two rows of 5 at the top and bottom, and are branched and connected to the main breaker 4 in parallel.

  As shown in FIG. 3, the primary feed branch breaker 6 is a circuit breaker for wiring in which an operation unit 61 that switches a switch by a swing operation is provided on the front surface. The primary branch breakers 6 are arranged in two rows, one on the upper side and three on the lower side, for a total of four.

  As shown in FIG. 3, the temporary feed main breaker 7 is constituted by an earth leakage breaker in which an operation unit 71 for switching a switch by a swinging operation is provided on the front surface. The primary feed main breaker 7 has characteristics that exceed the blocking ability of the primary feed branch breaker 6, and its body 72 has a width of two modules or more than the body 62 of the primary feed branch breaker 6. The length of the primary feed branch breaker 6 is approximately the same as that of the vessel 62.

  Here, the distribution board unit 11 provided in the chassis 1 will be described in detail.

  FIG. 4 is a partially omitted front view showing the distribution board unit, and FIG. 5 is a simplified wiring diagram showing the connection relationship of the distribution board unit of FIG. In FIG. 5, 46 indicates three lines, and 47 indicates two lines.

  As shown in FIG. 4, the distribution board unit 11 corresponds to single-phase three-wire wiring, and includes a main breaker 4, ten branch breakers 5, four primary feed branch breakers 6, and a primary feed trunk. A breaker 7 and the like are provided, and these are attached to the equipment mounting plate 12 and are attached to the chassis 1 by these equipment mounting plates 12.

  The equipment mounting plate 12 is made of a metal plate, and the main breaker 4 is disposed on the left side, which is one end side, and the conductive bar group 8 for connecting the branch breaker at the central position, the conductive bar group A plurality of branch breakers 5 are arranged in parallel in two upper and lower stages along the upper and lower sides of 8.

  Further, on the right side which is the other end side, a primary feed conductive bar group 9 for connecting the primary feed branch breaker 6, and a primary feed branch breaker in two upper and lower stages along both upper and lower sides of the primary feed conductive bar group 9. 6 are arranged side by side. A primary feed main breaker 7 is connected to the upper side of the primary feed conductive bar group 9 so as to be juxtaposed with one primary feed branch breaker 6.

  Further, the device mounting plate 12 is provided with a guide rail 13 provided with a cut-and-raised portion for a branch breaker mounting portion and a primary feed branch breaker mounting portion as shown in FIG.

  As shown in FIG. 4, the main breaker 4 has an operation lever 41 that switches between circuit interruption and connection on the front surface opposite to the mounting surface attached to the device mounting plate 12, and an upper portion of the main breaker 4 in the chassis 1. A primary-side terminal portion 42 to which a single-phase three-wire power line (not shown) that is drawn into the power supply is connected and supplied with commercial power of 100/200 V is provided, and a secondary-side terminal that is connected to the conductive bar group is provided below. A portion 43 is provided.

  The secondary terminal portion 43 and the conductive bar group 8 of the main breaker 4 are made of a metal plate and are electrically connected by a pair of voltage electrode connection bars (not shown) and a neutral electrode connection bar (not shown). Connected.

  Moreover, the primary side terminal part 42 and the secondary side terminal part 43, and the connection bar of the main breaker 4 are integrally covered with an insulating cover 46, thereby preventing an operator from getting an electric shock.

  The branch breaker 5 has an operation lever 51 for switching circuit interruption or connection on the front surface opposite to the mounting surface attached to the device mounting plate 12, and a branch breaker mounting portion is provided on the mounting surface of the branch breaker 5. Guide rail attachment portions (not shown) attached to the respective guide rails 13 are provided.

  Although not shown, the branch breaker 5 is provided with three power supply side connection portions connected to the two voltage electrodes and the neutral electrode of the conductive bar group 8 at the end facing the conductive bar group 8 side. Two of the three power connection sections are switched and arranged depending on whether the load side 100V wiring or 200V wiring.

  In addition, a load side connection portion is provided at an end opposite to the power supply side connection portion of the branch breaker 5, and a pair of connection holes (not shown) for inserting and connecting electric wires to be wired to the load side are provided in the load side connection portion. Is formed, and a release lever that opens and closes the terminal corresponding to each connection hole to enable insertion and removal of the electric wire is disposed.

  The primary feed branch breaker 6 has substantially the same configuration as the branch breaker 5 described above.

  As shown in FIG. 4, the primary feed main breaker 7 has an operation lever 71 for switching circuit interruption or connection on the front surface opposite to the mounting surface attached to the device mounting plate 12, and an upper portion of the main breaker 4. A primary side terminal portion 73 to which wirings 44, 44, 44 from the primary side terminal portion 42 are connected is provided, and a secondary side terminal portion 74 connected to the primary feed conductive bar group 9 is provided at the lower part. .

  The conductive bar group 8 is formed in a three-layer structure in which two voltage electrodes and one neutral electrode do not overlap each other, and is a direction perpendicular to the longitudinal direction, Branch breaker connection portions 87 are provided on both sides thereof. One end 82 is electrically connected to the secondary terminal 43 of the main breaker 4 by a connection bar (not shown).

  The primary conductive bar group 9 has a three-layer structure in which two voltage electrodes and one neutral electrode do not overlap each other, and is in a direction perpendicular to the longitudinal direction. In addition, primary feed branch breaker connection portions 97 are provided on both sides thereof.

  The other end 81 of the conductive bar group 8 and one end 91 of the primary feed conductive bar group 9 are supported by an insulating block (not shown) using a space corresponding to one vessel 52 of the branch breaker 5. And provided so as to be insulated from each other.

  The conductive bar group 8 and the primary feed conductive bar group 9 are provided with an insulating cover 80 thereabove, so that the operator does not receive an electric shock.

  According to the present embodiment, the secondary terminal portion 74 of the primary feed main trunk breaker 7 is connected to the primary feed branch breaker arrangement portion 97 of the primary feed conductive bar group 9 and the primary side of the main breaker 14 Since the primary side terminal part 73 is connected via the terminal part 42 and the wirings 44, 44, 44, the primary feed main breaker 7 can be provided without making the chassis 1 larger than necessary.

  In short, with the distribution board 10 ′ shown in FIG. 6, the space for branch / primary feed branch breaker 1B requires free space 1D in addition to the space for eight branch / primary feed branch breakers, In the distribution board 10 of the present embodiment, the branch / primary feed branch breaker space 1B is a space corresponding to ten branch / primary feed branch breakers, but there is no need to provide a free space 1D. Can be miniaturized.

  Even if a free space 1D is provided at the side of the branch / primary feed branch breaker space 1B of the distribution board 10, other devices can be provided in the free space 1D. Even the distribution board 10 having the main breaker 7 can enhance versatility.

  Further, the primary feed main breaker 7 has a dimension of the body 72 that is approximately twice the width of the primary feed branch breaker 6 and is formed substantially equal to the length of the primary feed branch breaker 6. Since it can be provided in a space corresponding to two feeding branch breakers 6, it is not necessary to newly use a dedicated branch breaker cover 23, extra cost is not required, and design can be improved.

  The conductive bar group 8 and the primary feed conductive bar group 9 having the three-layer structure described above are not limited to the configurations described in this embodiment and the like, and are not particularly limited as long as they have a three-layer structure. Needless to say.

Front view showing the distribution board of this embodiment Similarly, right side view of the distribution board in Fig. 1. Similarly, a front view showing a state where the door of the distribution board ′ in FIG. 1 is removed. Similarly, a partially omitted front view showing the distribution board unit of the distribution board of FIG. Similarly, a simplified wiring diagram showing the connection relationship of the distribution board in FIG. The front view which shows the state which removed the door of the example of the conventional distribution board

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Chassis which is a case main body, 4 ... Master breaker, 5 ... Branch breaker, 6 ... Primary feed branch breaker, 7 ... Primary feed breaker, 8 ... Conductive bar group , 9 ... Primary feed conductive bar county

Claims (1)

With the case body;
A group of conductive bars including a plurality of conductive bars provided with a plurality of branch breaker connection portions in a direction perpendicular to the longitudinal direction;
A main breaker provided on the case body connected to one end of the conductive bar group;
A plurality of branch breakers arranged and connected to the side of the branch breaker connection of the conductive bar group;
A primary feed conductive bar group provided on the case body so as to be opposed to the other end of the conductive bar group, comprising a plurality of primary feed branch breaker arrangement portions in a direction perpendicular to the longitudinal direction;
At least three or more primary feed branch breakers provided in the primary feed branch breaker arrangement;
For primary feeds that are larger than the primary feed branch breaker and are connected to one primary feed branch breaker placement section of the primary feed conductive bar group and also connected to the temporary side of the main breaker With the main breaker;
A distribution board characterized by comprising:

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