JPH0328121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a multi-tiered power distribution board with improved arrangement of load cables.

[Background of the invention]

In recent years, electrical parts, electrical equipment, etc. have become increasingly smaller as their quality improves. Switchboards used in substation equipment are no exception to this. Inside the switchboard, multiple conductive rooms and electrical rooms are stacked in multiple stages via the ceiling. Although each room has become smaller, the voltage and current capacities used have become increasingly large. In this case, the power supply busbar and load cable arranged in the conductive room of each room require an insulated distance, so there is a certain limit to miniaturization.

In an attempt to downsize the conductive room, for example, as shown in Figure 2 of Utility Model Application Publication No. 50-66123, the height of the switchboard was reduced by arranging the load cables. With this arrangement, there was a certain limit to reducing the height of the switchboard.

[Purpose of the invention]

An object of the present invention is to provide a multi-tiered power distribution board in which the height of the power distribution board is reduced.

[Summary of the invention]

The multi-tiered power distribution board of the present invention has a lower load cable insertion port formed on one side of the floor surface of the lower conductive chamber, and a protruding portion that projects into the lower conductive chamber from the floor surface of the upper conductive chamber opposite to the lower load cable insertion hole. An upper load cable insertion opening is formed in this protruding part, shifted from the lower load cable insertion opening, and each load cable inserted into each stage conductive chamber from each insertion opening is branched into multiple branch cables, and each branch The purpose is to form the cable into a sector-like shape whose height is gradually reduced from the insertion port side to the other side.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIG. 2 and FIGS. 1A and 1B.

The switchboard 1 shown in FIG. 2 forms an electrical chamber 3 and conductive chambers 4 and 5 via a partition wall 2 installed inside. The electrical chamber 3 and the conductive chambers 4 and 5 are stacked in three tiers. When a door 6 attached to one end of the electrical room 3 is opened, a drawer-type electrical device such as a shield disconnector 7 is disposed inside the electrical room 3. The breaker 7 goes in and out of the electrical room and electrically connects and disconnects from the power source side disconnecting section 8 and the load side disconnecting section 9 attached to the partition wall 2. The power supply side disconnecting section 8 is arranged in the power supply side conductive chamber 4 and is connected to the power supply conductor 10. The power conductor 10 is connected to a power bus 11 on the floor 1A side of the conductive room 4. The load-side disconnecting section 9 is arranged in the load-side conductive chamber 5.
The load side conductive chamber 5 has a partition plate 1 as shown in FIG. 1A.
A lower conductive chamber 5A and an upper conductive chamber 5B are formed via 4A and 14B. Although the partition plates 14A and 14B form an insertion opening 15 projecting into the lower conductive chamber, the insertion opening 15 may be formed in a part of the inclined surface as shown in FIG. As shown in FIG. 1B, the floor surface 1A of the lower conductive chamber 5A has load cable insertion holes 16, 17, 1 on one front side 5X ₁ and on the other side 5X ₂ of the back surface.
8 is formed. Similar insertion holes 15 are also formed in the partition plates 14A and 14B corresponding to the insertion holes 17 and 18.

The first and second load cables 12, 13 are inserted into the lower and upper conductive chambers 5 through the insertion holes 16, 17, 18.
It is inserted into A and 5B. The terminal portions 12A, 13A of the load cables 12, 13 in each conductive chamber are connected to the three-phase first and second branch cables 19 (19A, 19).
B, 19C) and 20 (20A, 20B, 20
C). 1st branch cable 19A
19C is a fan-shaped shape in which the height is gradually decreased from 5X ₁ on one side to 5X ₂ on the other side. The second branch cables 20A to 20C have a fan-like shape in which the height dimension is gradually decreased from the other side 5X ₂ to the one side 5X ₂ . The fan-shaped shapes of the first branch cable 19 and the second branch cable 20 are formed in opposite directions. Incidentally, the branch cable 19 arranged in the third-stage conductive chamber 5C is exactly the same as the arrangement in the lower-stage conductive chamber. That is, the first branch cables are arranged in odd-numbered conductive chambers, and the second branch cables are arranged in even-numbered conductive chambers.

In this configuration, the first and second branch cables 1
The fan-shaped shapes 9 and 20 are formed in opposite directions, and the branch cables 19C and 20C are lower in height than other branch cables. is branch cable 1
A protrusion 15A protruding toward the 9C and 20C sides can be formed. As a result, the terminal portion 12A,
Since it can store 13A, the height dimension of the terminal part H ₁
Therefore, the height _H2 of each conductive chamber 5A, 5B, and 5C can be reduced. In addition, another branch cable 19A is connected to each conductive chamber 15A, 15B corresponding to the protruding chamber 15A.
(20A), 19B (20B) can be placed,
Furthermore, the height dimension _H1 of each conductive chamber 5A, 5B can be reduced.

〔Effect of the invention〕

Therefore, the height dimension of the switchboard of the present invention can be reduced.

[Brief explanation of drawings]

FIG. 1A is an embodiment of the present invention.
An X-ray cross-sectional view, Figure B is a plan view of the bottom of Figure A, Figure 2 is a side sectional view of a three-tier closed switchboard shown as an embodiment of the present invention, and Figure 3 is a diagram of another embodiment of the present invention. FIG. 2 is a side sectional view of a conductive chamber according to an embodiment. 1...Switchboard, 2...Partition wall, 3...Electrical room, 4, 5...
conductive chamber, 7... breaker, 8, 9... disconnecting section, 12,
13...Load cable, 14A, 14B...Partition plate,
15...Insertion port, 19A to 19C, 20A to 20C
...Branch cable.

Claims (1)

[Claims] 1 The electrical room and the conductive room are stacked in at least two or more layers via a partition wall provided in the switchboard, and a three-phase disconnection section that electrically connects both rooms is attached to the partition wall, and branched into each disconnection section. For the load cables where the cables are connected and one end of each branch cable is pulled out from the upper conductive chamber and the lower conductive chamber, a lower load cable insertion opening is formed on one side of the floor of the lower conductive chamber, and a lower load cable insertion opening is formed on one side of the floor of the lower conductive chamber. A protruding part is formed on the floor surface of the upper conductive chamber on the opposite side into the lower conductive chamber, and an upper load cable insertion opening is formed in this protruding part at a position shifted from the lower load cable insertion opening. A multi-tiered power distribution board characterized in that each inserted load cable is branched into a plurality of branch cables, and each branch cable is formed into a fan-shaped shape whose height is gradually reduced from the insertion port side to the other side.