JPS6236443B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to closed switchboards.

Generally, a closed switchboard that houses drawers and disconnectors has a disconnector chamber at the front, a busbar chamber at the rear, and a controller chamber at the rear that houses monitoring and control equipment.

FIGS. 1A and 1B are a plan view and a side view showing the structure of a conventional closed switchboard, particularly showing the busbar and branch conductors disposed in the busbar chamber.

In FIG. 1, there is a sheath disconnection chamber 1 in the front part of the closed switchboard 10, a busbar chamber 2 behind it, and further,
A controller chamber 3 is provided at the back of the rear part, and a horizontal busbar 1 passing through the side surface of the busbar chamber 2 is provided.
1, 12, 13, 14, and vertical busbars 21, 22, 23, 2 connected to these horizontal busbars, respectively.
4 are arranged, and furthermore, a power supply side branch conductor 31,
By 32, 33, 34, vertical generatrix 21, 22,
23, 24 and the input ends of the breaker 41, 42, 4
3 and 44 are connected. Further, one end of the load side branch conductors 61, 62, 63, 64 is connected to the output ends 51, 52, 53, 54 of the breaker, and these load side branch conductors 61, 62, 63, 64 are connected to the bus bar. It penetrates the ceiling of the room 2 and the other end is drawn out to the outside of the closed switchboard.

In this case, the horizontal busbars 11, 12, 13, and 14 are located at the bottom of the busbar room, facing toward the back from the front, first with the positive phase busbars 11, 12, and 13, then with the neutral phase busbar 1.
4 are arranged in parallel in order, and similarly vertical generatrix 2
1, 22, 23, and 24 are one side of the busbar chamber, and as you go from the front to the back, you will see the busbars 21, 2 in positive phase first.
2 and 23, and then the neutral phase bus bar 24 are arranged in parallel in this order.

In addition, all of the power supply side branch conductors 31, 32, 33, and 34 that connect the vertical busbars 21, 22, 23, and 24 and the input ends 41, 42, 43, and 44 of the breaker are bent at approximately right angles. and are arranged so as to maintain a predetermined distance from each other.

The closed switchboard 10 houses two breakers, and current transformers 4 are attached to branch conductors 61, 62, 63, and 64 drawn out from the breakers.

In the above, one end of the power side branch conductor 34 of the neutral phase is connected to the input side neutral phase terminal of the breaker, and one end of the load side branch conductor 64 of the neutral phase is connected to the output side neutral terminal of the breaker. Although the connection to the phase terminal has been described above, an example in which a connection method called a link method is adopted is shown in FIGS. 2a and 2b.

In FIG. 2, the power supply side branch conductor 34 and the load side branch conductor 64 are connected by the link 20, but the power supply side branch conductor 34 is routed from one side surface to the other side surface. become.

In such conventional closed switchboards, the neutral phase power supply side branch conductor becomes long, wasting conductor material, and is routed from one side to the other in the center of the busbar room. However, this method has disadvantages in that it impairs assembly workability and also makes maintenance and inspection difficult.

The present invention has been made to eliminate the above-mentioned drawbacks, and aims to provide a closed switchboard that reduces the amount of conductor material used and facilitates assembly and maintenance inspection by changing the arrangement of the main busbars. shall be.

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

FIG. 3 shows the configuration of a closed switchboard according to the present invention, mainly showing the bus bar and branch conductor arranged in the bus bar room as in the conventional device, where a is a plan view and b is a side view. In the figure, the same reference numerals as in FIG. 1 indicate elements having the same effect.

In FIG. 3, horizontal generating lines 11, 12, 13,
14 is the lower part of the bus bar room as in FIG.
Next, the neutral phase busbars 14 are arranged in parallel in order. The positive phase vertical busbars 21, 22, 23 are also the first
As shown in the figure, they are arranged in parallel in order from the front toward the back on one side of the bus bar room.

However, the neutral phase vertical generatrix 24 is arranged on the other side surface opposite to the side surface on which the front vertical generatrixes 21, 22, and 23 are arranged. In this case, the vertical busbar 24 of the neutral phase is bent into a crank shape after being connected to the horizontal busbar 14, but it is very close to the input end 44 of the shield and disconnector, and therefore there is no connection between them. The power supply side branch conductor 34 to be connected can also be extremely short. This also eliminates the need to route the branch conductor 34 from one side surface to the other side surface, and the busbar chamber 34 is increased accordingly.
can be used widely.

In this case, even if the phase order of the input and output terminals of the breaker is reversed, the positive phase vertical buses 21 and 2
2, 23 and the vertical busbar 24 of the neutral phase are made opposite to each other, the power supply side branch conductor 34 can be significantly shortened as described above, and it can be routed from one side surface to the other side surface. This problem can be solved.

Next, FIGS. 4a and 4b show the case in which the present invention is applied to a link system. In this case, the load-side branch conductor 64 can be directly connected to the vertical bus bar 24, and the third
The neutral phase power supply side branch conductor 34 shown in the figure can be completely omitted, and the work of connecting it becomes unnecessary.

As is clear from the above description, according to the closed switchboard of the present invention, the amount of conductor material used can be significantly reduced, the busbar room can be used widely, and assembly and maintenance are extremely easy.

Further, depending on the case, the depth dimension of the busbar chamber can be shortened, and the shape of the entire closed switchboard can be reduced in size.

[Brief explanation of the drawing]

Figures 1 a, b and 2 a, b are plan and side views showing the configuration of a conventional closed switchboard with different connection states of branch conductors, and Figures 3 a, b and 4 Figures a and b are a plan view and a side view showing the structure of an embodiment of a closed switchboard according to the present invention, with different connection states of branch conductors. 1...Shiya disconnection room, 2...Busbar room, 3...Controller room,
4...Current transformer, 10...Closed switchboard, 11-14...Horizontal busbar, 21-24...Vertical busbar, 31-34...Power supply side branch conductor, 41-44...Shin breaker input end, 5
1 to 54...Shin breaker output end, 61 to 64...Load side branch conductor.

Claims (1)

[Claims] 1. A busbar room is provided behind the front sheath and breaker room, and a vertical busbar is connected to a horizontal busbar introduced from the side of the busbar room, and this vertical busbar and the sheath breaker are connected via a branch conductor. A closed power distribution board characterized in that a positive phase vertical busbar is disposed on one side of the busbar chamber, and a neutral phase vertical busbar is disposed on the other side of the busbar chamber.