JP5102801B2 - Branch breaker - Google Patents

Description

  The present invention relates to a branch breaker for use in a single-phase three-wire distribution board having three conductive bars, a conductive bar for a neutral electrode and a pair of conductive bars for a voltage electrode.

  This type of branch breaker has a pair of primary terminals that are electrically connected to any two of the three conductive bars, and a pair of two terminals that are threaded terminals for connecting wires. A secondary terminal is provided outside the container, and a contact device that opens and closes an electric circuit between the primary terminal and the secondary terminal is provided in the container.

  The branch breaker shown in FIG. 8 is used for a distribution board in which a conductive bar N for a neutral electrode and a pair of conductive bars L1 and L2 for a voltage electrode are respectively formed in a plate shape and arranged in parallel in the thickness direction. In the wall of the vessel 11, three end portions of the neutral electrode conductive bar N and the voltage electrode pair of conductive bars L1 and L2 are inserted in the longitudinal direction. The insertion groove 14 is provided (for example, refer patent document 1).

  The container 11 is attached to the distribution board with the wall provided with the insertion groove 14 as the conductive bars N, L1, and L2, and is attached to both sides of the conductive bars N, L1, and L2 in the width direction. be able to.

  The illustrated branch breaker 2 is for 100V, and the primary side terminal 12 is inserted in the insertion groove 14 into which the conductive bar N for the neutral electrode is inserted and into which the conductive bar L1 for the voltage electrode is inserted. It is provided in the groove 14 or the insertion groove 14 into which the conductive bar L2 is inserted. The primary side terminal 12 is a so-called plug-in connection terminal composed of a leaf spring formed in a shape into which the conductive bars N, L1, L2 can be inserted.

  In Patent Document 1, the branch breaker 2 in which the primary terminal 12 is provided in the insertion groove 14 into which the conductive bar L1 for voltage electrode is inserted, and the primary terminal 12 in the insertion groove 14 in which the conductive bar L2 is inserted. The structure which attaches two types of branch breakers 2 to the conductive bars N, L1, and L2 is described. In order to understand the type of the branch breaker 2, a display unit 51 on which the name of the conductive bar to which the primary terminal 12 is connected is provided is provided in the container 11.

  In contrast to the technique of balancing the current flowing through the conductive bar L1 and the current flowing through the conductive bar L2 using two types of branch breakers 2, the shape of the two conductive bars L1 and L2 for the voltage electrode is changed to one type. A technique that can achieve the balance with only the branch breaker 2 is disclosed (for example, see Patent Document 2).

  In the distribution board described in Patent Document 2, as shown in FIG. 9, when the container 11 is attached to one side of both sides in the width direction of the conductive bar N for the neutral electrode, The conductive bars L1 and L2 are formed so that the voltage electrode conductive bars L1 and L2 inserted in the insertion groove 14 provided with the primary terminal 12 are switched when the container 11 is attached. . The branch breaker 2 determines whether the primary side terminal 12 is connected to the conductive bar L1 or the conductive bar L2 depending on which side in the width direction of the conductive bar N the body 11 is attached.

Japanese Patent No. 3330047 JP 2001-69620 A

  By the way, in the branch breaker, a pair of primary side terminals 12 are disposed in two insertion grooves 14 into which a pair of conductive bars L1 and L2 for voltage electrodes are respectively inserted, and are used for 200V. is there. In the 200V branch breaker, one secondary terminal may be connected to the conductive bar L1 for the voltage electrode or connected to the conductive bar L2, and the pair of secondary terminals and the conductive bar for the voltage electrode may be connected. There is a problem that it is difficult to understand the electrical connection relationship between L1 and L2.

  In addition, when a 200V branch breaker is used in a distribution board having the conductive bars L1 and L2 configured as shown in FIG. 9, the body on either side of the conductive bars N, L1 and L2 The connection relationship changes depending on whether 11 is attached, and the connection relationship becomes more difficult to understand.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a branch breaker that makes it easy to understand the electrical connection relationship between the secondary terminal and the conductive bar.

  The invention of claim 1 is a branch breaker used for a single-phase three-wire distribution board comprising a conductive bar for a neutral electrode and a pair of conductive bars for a voltage electrode, and is provided in the longitudinal direction of the conductive bar. It is provided with a container that can be attached to both sides of the conductive bar in the intersecting direction, and the container is a plug-in connection terminal provided on one wall surface side of the container, and a pair of conductive bars for voltage electrodes, respectively. A pair of primary side terminals to be electrically connected, a pair of secondary side terminals to which the electric wires are electrically connected, and 2 when the container is attached to one side of the both sides of the conductive bar. Two display units, a display unit that displays the electrical connection relationship between the secondary terminal and the conductive bar for the voltage electrode, and a display unit that displays the connection relationship when the container is attached to the other side; Each display unit is indicated in the orientation that matches the orientation of the instrument when the instrument is installed. Characterized in that it comprises display each.

  According to a second aspect of the present invention, in the first aspect of the invention, the distribution board is attached to a wall, and the two display portions are arranged on one surface in the thickness direction in the vertical direction and are accommodated in the body. A display panel, and the container includes a display window that exposes the display unit to the outside of the container, a position at which one display unit faces the display window, and a position at which the other display unit faces the display window. The display board is slidably supported between the two.

  In the structure described in Claim 1, since each display part is each provided with the display described by the direction match | combined with the mounting direction of the container when the container is attached, the container is either of the conductive bars. Even if it is attached to the side, the display on one display unit matches the mounting direction of the container, and as a result, there is an advantage that the electrical connection relationship between the secondary terminal and the conductive bar becomes easy to understand.

  In the configuration described in claim 2, the container supports the display plate slidably between a position where one display portion faces the display window and a position where the other display portion faces the display window. Therefore, the display unit facing the display window can be automatically switched according to the mounting direction of the container, and only one of the two display units can be visually recognized by the operator. There is an advantage that the electrical connection relationship between the secondary terminal and the conductive bar can be understood more easily than in the first aspect.

Embodiment 1 is shown, (a) is a front view, (b) is a side view. It is a top view same as the above. It is a rear view same as the above. It is a front view which shows the state which attached the same to the electricity distribution panel. (A) is a principal part front view which shows the state which attached the same to the upper side of the electroconductive bar, (b) is a principal part front view which shows the state which attached the same to the lower side of the electroconductive bar. FIG. 6 is a front view showing a second embodiment. It is a partially broken side view same as the above. It is a perspective view which shows a prior art example. It is sectional drawing which shows another prior art example.

(Embodiment 1)
In this embodiment, as shown in FIG. 4, a 200 V branch breaker 1 used for a single-phase three-wire distribution board 3 to which a plurality of 100 V branch breakers 2 can be attached is illustrated.

  The distribution board 3 of the present embodiment includes a casing 31 that is attached to a wall, and the casing 31 is provided with conductive bars N, L1, and L2 having the configuration shown in FIG. It shall be.

  The conductive bar N is arranged such that the width direction is up and down and the longitudinal direction is the left and right direction, and the conductive bars L1 and L2 are arranged behind the conductive bar N. Each conductive bar N, L1, L2 is connected to a terminal screw 33 which is a secondary terminal of the main breaker 32, respectively.

  A plurality of attachment portions (not shown) to which the branch breaker 2 for 100V can be attached are arranged in parallel in the left-right direction on the upper and lower sides of the conductive bar in the casing 31. The branch breaker 2 for 100V is formed in the front rectangular shape, and is attached to an attachment part.

  As shown in FIGS. 1 to 3, the branch breaker 1 for 200 V includes a container 11 formed in a front side shape. Three insertion grooves 14 into which the three conductive bars N, L1, and L2 are respectively inserted are recessed in one side surface of the container body 11 that intersects the longitudinal direction. As shown in FIG. 4, the container 11 is attached to the upper or lower side of the conductive bars N, L1, L2 with the wall provided with the insertion groove 14 as the conductive bars N, L1, L2 side. The member 34 is fixed to the housing 31 (see FIG. 4).

  Here, the width dimension (the length dimension in the left-right direction) of the container 11 is set to be twice the width dimension of the branch breaker 2 for 100V.

  The container 11 includes a pair of primary terminals 12 connected to the conductive bars L1 and L2 for voltage electrodes, a pair of secondary terminals 13 that are screw terminals for connecting wires, and the inside of the container 11 An operation handle 15 for manually opening and closing a contact device (not shown) housed in the housing is provided exposed to the outside.

  Each primary side terminal 12 is a so-called plug-in connection terminal formed of a leaf spring formed in a shape into which the conductive bars L1 and L2 for voltage electrodes are respectively inserted, and there are two differences between which the conductive bars L1 and L2 are inserted. Each is disposed in the insertion groove 14. One primary side terminal 12 is provided at each of both portions in the width direction (left and right direction in the figure) of the container body 11. A pair of secondary side terminals 13 are arranged in parallel on the front surface side of the container body 11 at both sides in the width direction of the container body 11.

  On the front side of the container 11 provided with the secondary side terminal 13, two display sections 16 for displaying the electrical connection relationship between the secondary side terminal 13 and the conductive bars L1, L2 for voltage electrodes. Is provided. The two display parts 16 are arranged in parallel in the up-down direction. The display section 16 on the side close to the secondary terminal 13 is for displaying the connection relationship when the container 11 is attached to the upper side of the conductive bars N, L1, L2, and from the secondary terminal 13 The distant display unit 16 is for displaying the connection relationship when the container 11 is attached to the lower side of the conductive bars N, L1, and L2.

  On the display unit 16, characters “L1”, “L2”, and “200V” are displayed as displays. The characters “L1” and “L2” are written at positions corresponding to the secondary terminal 13. Specifically, the letter “L1” is written on one of the widthwise parts of the container 11 and the letter “L2” is written on the other. The character “200V” is written between the characters “L1” and “L2”.

  Further, as described above, when the conductive bar N, L1, L2 having the structure shown in FIG. 8 is used and the container 11 is attached to the upper side of the conductive bar N, L1, L2, the conductive bars N, L1, L2 Since the secondary terminal 13 to which the conductive bars L1 and L2 for the voltage electrode are connected is opposite when the container 11 is attached to the lower side, in one display unit 16 and the other display unit 16, The positions of the characters “L1” and “L2” are interchanged.

  Moreover, as above-mentioned, since the container 11 is attached to the distribution board 3 by making the wall of the side in which the insertion groove 14 was provided into the conductive bar N, L1, L2 side, the conductive bar N, L1, L2 When the container 11 is attached to the upper side and when the container 11 is attached to the lower side of the conductive bars N, L1, and L2, the attachment direction of the container 11 is opposite. In the present embodiment, the characters “L1”, “L2”, and “200V” indicate that the display unit 16 on the side close to the secondary terminal 13 has the container 11 attached to the upper side of the conductive bars N, L1, and L2. The display unit 16, which is represented in a direction that matches the mounting direction of the main body 11 and is far from the secondary side terminal 13, is a device when the main body 11 is mounted below the conductive bars N, L 1, L 2. It is written in a direction that matches the mounting direction of the body 11.

  Therefore, as shown in FIG. 5A, when the container 11 is attached above the conductive bars N, L1, and L2, the connection when the container 11 is attached above the conductive bars N, L1, and L2 is described. The character on the display unit 16 (the display unit 16 on the side close to the secondary terminal 13) that displays the relationship is upright, and the character on the display unit 16 on the side far from the secondary terminal 13 is inverted. On the other hand, as shown in FIG. 5B, when the container 11 is attached to the lower side of the conductive bars N, L1, L2, and when the container 11 is attached to the lower side of the conductive bars N, L1, L2. The character of the display unit 16 (the display unit 16 far from the secondary terminal 13) that displays the connection relationship is upright, and the character of the display unit 16 near the secondary terminal 13 is inverted. .

  Therefore, the connection relationship can be recognized by reading the characters on the upright display portion, and the electrical connection relationship between the secondary terminal 13 and the voltage electrode conductive bars L1, L2 is easy to understand. . Since the connection relationship is easy to understand, when the current measurement is performed by connecting a current transformer to the secondary terminal 13, the conductive bar L1 (or L2) is mistakenly connected to the secondary terminal 13 and the current transformer. It is possible to prevent the power from being measured by the current flowing through and the voltage of the conductive bar L2 (or L1).

  In the present embodiment, an example in which the characters “L1”, “L2”, and “200V” are represented as a display is shown, but the present invention is not limited to characters, and may be a symbol.

(Embodiment 2)
In the first embodiment, the configuration in which the display unit 16 is provided on the front surface of the container body 11 has been described. However, in the present embodiment, two types of expressions similar to those of the display unit 16 are provided on the front surface of the display board 41 illustrated in FIGS. A configuration provided with a display unit (not shown) will be described.

  The two display units are arranged in the vertical direction. The display board 41 is accommodated in the container 11, and a display window 17 for exposing the display unit to the outside of the container 11 is opened on the front wall of the container 11. In the container 11, a sliding contact wall 11a that sandwiches the display plate 41 together with the front wall in the front-rear direction and a pair of upper and lower stop walls 11b are provided.

  The dimension between the pair of stop walls 11b is set larger than the vertical dimension of the display board 41, and the dimension between the front wall of the container 11 and the sliding contact wall 11a is substantially the same as the thickness dimension of the display board 41. Set to the same dimensions. The pair of stop walls 11b are in contact with one of the upper and lower end surfaces of the display plate 41 at a position where one display portion 16 faces the display window 17 and a position where the other display portion 16 faces the display window 17, respectively. Is provided.

  The display board 41 slides up and down by its own weight according to the mounting direction of the container 11, and the display unit 16 that can be viewed from the display window 17 is switched according to the mounting direction of the container 11. Therefore, only the display portion on which the characters “L1”, “L2”, and “200V” (see FIG. 1A) are established is visible, and the secondary terminal 13 and the conductive bars L1 and L2 (see FIG. 8). ) Is easier to understand than in the first embodiment.

  Other configurations are the same as those of the first embodiment.

DESCRIPTION OF SYMBOLS 1 Branch breaker 3 Distribution board 11 Body 12 Primary side terminal 13 Secondary side terminal 14 Insertion groove (connection part)
16 Display unit 17 Display window 41 Display panel

Claims (2)

  A branch breaker for use in a single-phase three-wire distribution board having a conductive bar for a neutral electrode and a pair of conductive bars for a voltage electrode, wherein the conductive bar is arranged in a direction crossing the longitudinal direction of the conductive bar. The container body is provided with a detachable container body on each side, and the container body is a plug-in connection terminal provided on one wall surface of the container body and electrically connected to a pair of conductive bars for voltage electrodes. Primary terminal, a pair of secondary terminals to which electric wires are electrically connected, and a secondary terminal and a voltage electrode when the container is attached to one side of the both sides of the conductive bar Two display units including a display unit for displaying the electrical connection relationship with the conductive bar and a display unit for displaying the connection relationship when the container is attached to the other side. , Each display is displayed in the orientation that matches the orientation of the instrument when it is installed Branch breakers characterized by Rukoto.   The distribution board is attached to a wall, and the two display units are arranged in parallel in a vertical direction on one surface in the thickness direction and include a display board accommodated in the container. A display window is provided to be exposed to the outside of the body, and the display plate is slidably supported between a position where one display portion faces the display window and a position where the other display portion faces the display window. The branch breaker according to claim 1, wherein the branch breaker is provided.

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