JP4983640B2 - Low voltage distribution equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a low-voltage power distribution facility provided indoors, and more particularly to the disposition of the main bus in a mounting means for shortening the installation period of the switch to the main bus such as a circuit breaker essential for power distribution. It is.

  Needless to say, a circuit breaker such as a circuit breaker that opens and closes an electric circuit or that interrupts the electric circuit is disposed in the electric circuit. Wiring work is performed. Here, since the output terminal is connected to an unspecified load, the switch is generally arranged, for example, after the distribution board is installed in the field, the connection work will be done. Since the connection destination of the terminals is determined in the panel such as a main bus such as a main bar, the connection work is performed in the manufacturing process of the distribution board. Here, if only one switch is provided, it will not be a problem. However, in the case where the power is supplied to a large number of load devices like the distribution board described above. Therefore, it is easily expected that a lot of man-hours will be required for screwing the input terminal.

  Therefore, the power supply side of the switch is a receiving blade-like plug, and this plug is inserted into the main bar arranged at equal intervals, so that the connection work of the input terminal is completed. It is widely known to shorten the number of manufacturing steps (for example, see Patent Document 1).

  The switch disclosed in Patent Document 1 is assumed to be connected to a device that is driven or consumed with a relatively small current (about 30 A). The main bar is arranged so that the contact surfaces with the plugs face each other. On the other hand, when the voltage between the electrodes is 400 V class and the current is relatively large such as 100 to 600 A, it is difficult to apply Patent Document 1 from the viewpoint of securing the distance between the electrodes and the contact energization capability. Therefore, an insertion terminal portion having a receiving blade-like plug connected to the power source side of the switch is added to the bottom surface of the switch, and the plug is connected to the input terminal and the output terminal of the switch. It is also known that it is inserted into main buses arranged at equal intervals so as to be orthogonal to the longitudinal direction connecting the two (see, for example, Patent Document 2). Panels adopting this method are generally called power distribution boards. In this specification, the “distribution” part is referred to as “low-voltage distribution equipment” and the “main bus” is referred to as “parallel conductor”. The band is hereinafter referred to as “band”.

Japanese Patent Laid-Open No. 10-241540 (page 4, left column, lines 22 to 32, FIG. 1) JP 2003-134615 A (right column on page 3, line 1 to line 5, FIG. 6)

  In the method of this patent document 2, since the plug is attached to the plug-in terminal portion so as to match the pitch of the parallel conductive band, the pitch of the parallel conductive band is naturally not secured properly. The insertion work will be hindered. However, as is clear from FIG. 6, the parallel conducting band is bolted to the resin mounting base, and therefore, there is a risk that the compression thrust is generated by the tightening thrust generated by this bolting and the pitch is distorted. In particular, in the 1600A class in which the width direction of the parallel conducting band (that is, the contact surface with the plug) is wide, the distance between the bolt and the other end is relatively small because the bolt is located at one end of the parallel conducting band. By increasing the length, the pitch shift at the other end (that is, the contact surface side with the plug, see FIG. 7B) will appear remarkably.

  In addition, even if the connection of the input terminal of the breaker and the switch is inserted into the plug and the man-hour is reduced, as described above, the bolting of the parallel conductive band remains, so in terms of this man-hour. There was still room for improvement.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a low-voltage power distribution facility that can appropriately maintain the inter-electrode pitch of the parallel conductive bands.

Is arranged perpendicular to the longitudinal direction connecting the input terminal of the switch and an output terminal, and parallel gubernaculum which are electrically connected to the input terminal, arranged like strut member to form the low-voltage distribution facilities In the low-voltage power distribution facility provided with a plurality of resin-made support bases that are attached and support the parallel conductive bands, the parallel conductive bands are supported on the support bases from both side surfaces of the parallel conductive bands. It is performed by fitting a convex portion extending in parallel with the longitudinal direction and a concave portion of the support base that engages with the convex portion, and at least one set of the plurality of support bases includes the concave portion. It is designed to be attached so as to face each other.

  As described above, according to the present invention, it is possible to provide a low-voltage distribution facility with reduced powering reliability and high power supply reliability.

Embodiment 1 FIG.
1A and 1B are diagrams showing the fitting of a parallel conductive band and a support base, which are main parts, in a low-voltage distribution facility according to Embodiment 1 of the present invention. FIG. 1A is a front view, and FIG. (C) is a bottom view. 2 and 3 are perspective views of the parallel conducting band and the support base, respectively. FIG. 4 is a perspective view showing the attachment of the switch to the low-voltage distribution facility.

  In FIG. 4, three parallel conducting bands 4 are arranged in parallel in a low-voltage distribution facility (not shown), and a mounting panel 5 generally called an angle is stretched vertically and horizontally. A mounting hole is provided in the mounting panel 5, and an insertion type switch to be described later is installed. In addition, since there are three parallel conducting bands 4, in the first embodiment, a three-phase three-wire or a single-phase three-wire is assumed, but the present invention is not limited to this, and two or four It may be.

  The insertion type switch 6 includes a switch 7 and a terminal block 8, and a power supply side terminal (not shown) of the switch 7 is electrically connected to a plug (not shown) mounted on the terminal block 8. Has been. That is, as described above, if the insertion type switch 6 is installed on the mounting panel 5, the plug is inserted into the parallel conductor 4, and the insertion type switch 6 is further connected to the mounting panel with the tightening screw 9. By attaching to 5, so-called input terminal electrical connection is completed. Further, the output terminal, that is, the load-side terminal 10 is connected by tightening a normal electric wire or a bar with a screw (not shown) as the shape indicates. Needless to say, the essence of the present invention lies in how the parallel conductive bands 4 are arranged in parallel, and the electrical connection between the parallel conductive bands 4 and the insertion switch 6 is the main part of the present invention. Therefore, further detailed explanation is omitted.

  In FIG. 1, the parallel conducting band 4 is supported by a support base 3 attached to a housing 1 of a low-voltage power distribution facility with a mounting screw 2. Here, as shown in FIG. 2, the parallel conducting band 4 is provided with a convex portion 4 a extending in both directions (on the paper and in the left-right direction) from the surface in contact with the plug at a position where it does not interfere with the plug of the terminal block 8. ing. In addition, it is preferable from the manufacturing cost that this convex part 4a provides a through-hole in a parallel conducting band, and press-fits a round bar in this through-hole.

  On the other hand, the support base 3 is formed of a resin to insulate the parallel conductive bands 4, and, as shown in FIG. I have. In addition, 3c is a screw hole into which the attachment screw 2 is screwed. Moreover, the groove | channel 3a and the recessed part 3b are not limited to three shown in this FIG. 3 similarly to the above, Four may be sufficient. As shown in FIG. 1 (a), the support 3 is attached with an attachment screw 2 at a predetermined pitch (= the pitch of the convex portion 4a). The base 3 is not yet installed. In addition, although this pitch is shown in the figure at equal intervals, it is not necessarily limited to this.

  And after inserting the surface which contacts the plug of the parallel conducting band 4 into the groove 3a so that the convex part 4a comes to the upper part on the paper surface of FIG. 1 (a) of each support base 3, the convex part 4a becomes the concave part 3b. Fit together. Thereby, the movement of the parallel conducting band 4 in the left, right, and downward directions on the paper surface is limited. Further, when the support 3 is moved downward in a so-called rail shape from the top 4b so as to be positioned at the upper part, when the projection 4a and the recess 3b are fitted together, the mounting screw 2 supports the other support. As with the base 3, it is formed as a low-voltage power distribution facility by being attached to the housing 1.

  With this configuration, since the parallel conducting band 4 is not fastened with a bolt or the like, the inter-electrode pitch on the top surface 4c of the parallel conducting band 4 is appropriately maintained, and the reliability of power supply is further improved. To do. Moreover, since the support stand 3 located in the upper part is changed in its mounting direction with the support stand 3 attached before inserting the parallel conducting band 4, as is clear in FIGS. 1 (a) and 1 (b), In addition to the above-described left and right directions and the downward direction, it is possible to hold the parallel conductive band 4 in the upward direction, that is, in all directions.

  Furthermore, needless to say, since the bolt fastening operation of the parallel conducting strip 4 is abolished, it is possible to reduce the number of assembly steps. In particular, in a panel in which the breaking capacity of a switch (circuit breaker) is increased, in order to withstand the electromagnetic repulsion force between parallel conductive bands in the passing current according to the breaking capacity, the present invention and the patent document This ripple effect is great because there is a possibility that the number of support bases (mounting bases) shown in 2 is not 5 but 5 or more.

It is a figure which shows fitting of the parallel conducting strip and support stand in Embodiment 1 of this invention. It is a perspective view of the parallel conducting band in FIG. It is a perspective view of the support stand in FIG. It is a perspective view which shows attachment of the switch in Embodiment 1 of this invention.

Explanation of symbols

3 support base, 3a groove, 3b concave portion, 4 parallel guide band, 4a convex portion, 4b topmost portion,
6 insert type switch, 7 switch, 8 terminal block.

Claims (1)

A low-voltage distribution facility to which a switch such as a circuit breaker is attached, which is arranged so as to be orthogonal to the longitudinal direction connecting the input terminal and the output terminal of the switch and is electrically connected to the input terminal. A conductive band, and a plurality of resin-made support bases that are mounted side by side and attached to a column member that forms the low-voltage power distribution facility, and that support the parallel conductive band;
The parallel conductive band is supported on the support base by fitting a convex portion extending in parallel with the longitudinal direction from both side surfaces of the parallel conductive band and a concave portion of the support base engaging with the convex portion. And at least one set of the plurality of support bases is attached so that the recesses face each other .

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