JPS6016814B2 - 3 phase branching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-phase branching device, and its object is to obtain a device of this type in which the phase order can be varied using the same parts without changing the bus bar arrangement.

As is well known, reduced size switchgear,
Construction of reduced-sized substations, etc. is being carried out.

Recently, in order to promote further miniaturization, multi-phase all-in-one types have been manufactured instead of the conventional phase-separated type.

The most typical one is the three-phase all-in-one type. by the way,
In such a compact substation, etc., when the bus 1 is branched into a T or L branch as shown in Fig. 1 to connect a power transformer (hereinafter referred to as MOF) 2 or a transformer, It is necessary to align the phase order of the conductors of the branch busbar 3 and connect them.

Also, since the phase order of MOFs, transformers, etc. is determined for each individual device, the phase order of the conductors must be completely reversed depending on which side (branch bus 3a order or 3b side) they are connected to after branching. There is a need.

Therefore, a branching device is used to perform the above-mentioned branching, but the conventional device has the disadvantage that the phase order is reversed or the conductor arrangement is different between the busbar portion and the branching portion.

The present invention has been devised in view of the above points, and will be described below with reference to FIGS. 2 and 3. In Figure 2, 21
1 is a branch container filled with an insulating medium such as SF6 gas, and is composed of a bus bar portion 22 and a branch portion 23, and for convenience of explanation, only the external portion is shown with chain lines.

24 is a modified Y-shaped first conductor, as shown in Figure 3a,
It consists of a square-shaped busbar connection conductor 25 and a linear branch conductor 26, the latter branching off from one end of the former at an acute angle and disposed equidistantly to the left and right.

Reference numeral 27 denotes a T-shaped second conductor, as shown in FIG. ing.

Reference numeral 30 denotes a third conductor which is used for bus bar connection and is formed in a '-shape in the same plane as shown in FIG. 3c.

31 is a modified T-shaped fourth conductor, which is made up of an intermediate conductor 32 for connecting the third conductor and a linear branch conductor 33 branching at equal distances from one end to the left and right in a right angle direction, as shown in FIG. 3d. It is made.

The intermediate conductor 32 is orthogonal to the conductor 33, and within a plane including the conductor 32, the mirror end side of the intermediate conductor is bent to one side. First to fourth conductors 24, 27, 30, 3
A conductor connection portion 34 is provided at each end of the wire.

Thus, the first to fourth conductors 24, 27, 30, 31
are arranged as shown in FIG. 2a, and the first to third conductors 24
, 27, 3 rivers are R, S, and T phase bus conductors 35, 36
, 37 are connected.

Therefore, each straight branch conductor 26, 29, 33 is R, S
, T, and the conductor arrangement is a triangular arrangement with the apex on the lower side on both the busbar side and the branch side when viewed from the end face of the container. MOF or transformer branch conductor 26,2
When connected to the front drawer side (20a side) of 9 and 33, the phase order becomes R, S, and T from the left side.

Moreover, when arranged and connected on the rear drawer side (2.0b side), the phase order becomes T, S, and R from the left side toward the branch conductors 26, 29, and 33. Next, to reverse the phase order, the first conductor 24 is rotated 1800 times and the third conductor 30
All you have to do is rotate it 90 degrees and change their positional relationship.

Then, the busbar conductors 30, 28, 25 of the third to first conductors are connected to the busbar conductors 35, 36, 37 of the R, S, and T phases, so the straight branch conductors 33, 29, 26 are connected to the busbar conductors 35, 36, 37 of the R, S, and T phases. ,
The phase order is S and R.

Therefore, when viewed from the plane of the container on both the busbar side and the branch side, the conductors are arranged at each vertex of a triangle having the vertex on the lower side, and the phase order is reversed compared to the case shown in FIG. 2a. For this reason, the phase order of the branch conductors connected to the MOF or transformer is reversed while the MOF or transformer is disposed on one side of the branch.

Note that the above explanation takes the case of T-branching as an example, but when L-branching the container 21, only one side of the branch side (20
It can be carried out in exactly the same way by using the a side or the 20b side).

As detailed above, according to the present invention, it is possible to reverse the phase order on the branch side without changing the arrangement of the branch conductors by using the same parts, that is, the first to fourth conductors, and only rotating a part of them. can.

Therefore, branch connection of devices such as MOFs and transformers whose phase order is a problem to the three-phase bus becomes extremely convenient.

[Brief explanation of the drawing]

Fig. 1 is a single line diagram showing a branching device, Fig. 2 is an embodiment of the present invention, a is a perspective view of a negative phase connection, b is a perspective view of a negative phase connection, and Fig. 3 is a perspective view of the first conductor. 1 to 4, in which a is a plan view of the first conductor, b is a plan view of the second conductor, c is a side view of the third conductor, and d is a perspective view of the fourth conductor. ．． 21... Container, 24... First conductor, 27
...Second conductor, 30...Third conductor, 3
1... Fourth conductor, 25, 28... Bus bar connection conductor, 26, 29, 33... Branch conductor. 41 [b) (C) (〆J Tue 2 Figure W) X 2 Figure 'b)

Claims (1)

[Claims] 1. A first conductor consisting of a square-shaped bus-bar connection conductor and a linear branch conductor that branches at an acute angle from one end and is provided equidistantly to the left and right; a straight bus-bar connection conductor and this one end; a second conductor consisting of a linear branch conductor branched equidistantly to the left and right in a right angle direction from A fourth conductor consisting of an intermediate conductor to which one end of the three conductors is connected and a straight branch conductor branched from the other end at equal distances to the left and right in a right angle direction are each arranged in a container filled with an insulating medium. . A three-phase branching device, characterized in that the phase order can be reversed while the conductor arrangement as viewed from the end surface of the container remains the same.