JPS60219904A - Bus unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement in a closed type distribution panel for distributing alternating current electricity.

[Background of the invention]

Conventionally, the size of the conductor used in a closed arrangement is determined by the size of the conductor that carries current.If the wL flow is relatively small, the size of one conductor can be small, but the size of the conductor is As the °1 flow increases, the conductor size must naturally be increased. The conventional way to increase the conductor size is to increase the number of conductors per unit. It is good to increase the number of bamboo ropes.

In this case, it is common to arrange two or three conductors of the same size in parallel.

[Purpose of the invention]

An object of the present invention is to eliminate the uneconomical nature of arranging conductors of the same size in parallel, and to provide an economical closed type panel board by effectively utilizing the cross section of the conductors.

[Summary of the invention]

In the arrangement of conductors for conducting electricity in a distribution panel, the present invention is characterized in that: - When using a plurality of conductors for each phase, the size of the conductor placed on the upper side in the vertical direction is larger than the conductor placed on the lower side. The percentage mark is to make it a conductor.

[Embodiments of the invention]

The details of the present invention will be explained with reference to FIGS. 1 to 3. In Figures 1 and 2, l is the closed type arrangement board body, 2 is the door,
3 indicates the ceiling board, and 4 indicates the outer periphery of the back panel. Closed layout 'II
Electricity is conducted from the busbar 5 to the cable pend 7 through the disconnector 6 to EIItl. In between, disconnection section 8 and f
1 to which the body IO is connected via a device such as a flow vessel 9;
Generally, when the flow capacity is small, it is composed of one piece per body 1011, but when #1117IC becomes large, it becomes necessary to increase the cross section lJ1, and as shown in the figure,
There are many cases in which a two-sheet configuration formula tL is used, such as 0a and tab.
In addition, these conductors have horizontal parts, and some parts of the conductors 11 rise vertically.

Place the conductor horizontally - the lower conductor 1
Due to the 11L female I flowing through 0b, wand loss occurs in the upper extension 1 conductor tab, causing an increase in temperature? The heat is generated and radiates into the surrounding σ] nitrogen gas. On the other hand, the flow 11 directed to the IY51 stock also causes wand sliding on the upper conductor 10a, causing a temperature rise. Here, in addition to the amount of heat generated in the upper conductor 10 a rJ upper monument body, it is also affected by the lower 9III conductor tob due to convection, so if the upper and lower co-sectional areas are the same,
The upper 9iIl-only 10a has a larger rise in temperature than the lower conductor 10b, and the upper 1I is proportional to the resistance temperature of the conductor.
The first flow II flowing to the III conductor tOa is the lower conductor 10 b
K flowing 1 style 1. Therefore, if conductors with the same cross-sectional area are arranged, the amount of heat generated will increase, and the temperature rise of the closed-circuit distribution board will increase. In addition, 114 centroba body.

In the present invention, as shown in FIG. 3, the upper l111 conductor 10a
The thickness 1' of is made slightly thicker than the thickness T of the lower g11!4 body tab. A similar effect can be obtained by increasing the cross section [ll1l'R, but normally, the width of 4 bodies 100 Wk
It is more effective to keep the thicknesses Ill, , Ill, constant and vary them in order to reduce the dimensions of the distribution string.

It is most effective to set the ratio of l111 and T to 1.2 to 1.5 times Aj[. Further, the current-carrying surface l* of the upper @conductor may be made wider than that of the lower 91114 body.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of the closed type distribution board, FIG. 2 is a sectional view of the instrument at the disconnection section, and FIG. 3 is a side view of the closed type distribution board.

Claims (1)

[Scope of Claims] 1. In the main assembly of a power distribution board that views alternating current (FI) electricity, the four bodies of each phase are composed of two upper and lower parallel conductors, and the conductors disposed on the upper side are 〼wL surface pier is extended above the above-mentioned conductor a
Mother characterized by making it larger than the area? IM device.