JPS62107611A - Grounding switch of collective three-phase gas insulated switchgear - 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] [Industrial Application Field] This invention relates to a grounding switch for a three-phase gas/foam edge switching device in which the U, V, and W phase conductors are arranged in a triangular shape. It is something.

[Conventional technology]

Figures 3 and d show an example of a conventional grounding switch for a three-phase gas-insulated switchgear. (,,?1 (ri) is stored at one point in each isosceles triangle.'@Conductors (21+, ?+ (da) have fixed side contacts (2a) (Ja), respectively. (S a) is provided in the vertical direction of each conductor (21 (3) group).
V-phase, U-phase, W-phase movable contacts that can be brought into and out of contact with core a') (, 7a) (lIa) frlfgl (71) are provided respectively. Each phase movable contact (sl (, i,
l (The key of 71 is rochodoko/tact (5)fa
l (7+ is a slidable movable contact (C0 and each phase electric field mitigation shield [,?1 (91 (/θ) is attached. Each phase movable contact) frH61 (end of 71 is attached to the end of the lever (/3) that is rotated by the shaft (/) in the movable ground tank (/l). The movable contact for each phase (rl (61) is the movable side contact/
Grounding terminal (15) that is insulated and drawn out to the outside of the (//)
is provided via an insulating plate (/7). Ground terminal (
/! f) has a grounding bar (
/6) is installed.

Figures 5 and 6 show other examples of conventional earthing switches, where the V-phase conductor (/za) is located at the U-phase conductor (2), W@
It is located at a symmetrical position with the phase conductor (3) in Figs. 3 and 3 with respect to the straight line connecting the conductors (tI). Concomitantly, the ■ phase movable contact (/?) and the V phase shield (20) are longer than those shown in FIGS. 3 and q described by MJ.

In this way, the three-phase conductor of the earthing switch is the V-phase conductor (J)
(/lr) are arranged symmetrically with respect to the straight line connecting the U-phase conductor (2) and W-phase conductor (xl), and when connecting each phase conductor, it forms an isosceles triangle. There is.

Next, the operation of the above configuration will be explained. Both the first conventional example and the second conventional example have the same operation, and will be explained using the first conventional example. By rotationally driving the shirt) (/J), the lever (/3) rotates, and the movable contactor l-(ri (61f71), which is at ground potential, simultaneously moves linearly.

Then, their tips are fixed side contacts (core a).
) (Ja) (4'a), each phase conductor (21+, 71 fp+ becomes ground potential. Therefore, movable contact lrl (41 (71, ground terminal (1
5)" is insulated from the movable ground tank (//) and is maintained at the ground potential by the ground bar (/6) during normal operation. Also, the ground bar (16) By removing it, the earthing switch can also be used as a terminal for measuring the resistance and insulation resistance of the main circuit of each phase.

[The problem that the invention attempts to solve]

Since the conventional earthing switch is configured as described above,
As the V-phase movable contact (/9) becomes longer and its weight increases, its operating characteristics may change or the shaft (
There was a problem that a large amount of electric charge was applied to the lever (13).

This invention was made to solve the above-mentioned problems. (1) The phase movable contact is short, the weight is reduced, and the operating characteristics are excellent, and the movable side is - It is an object of the present invention to obtain a grounding switch for a three-phase all-in-one gas-insulated switchgear that can be used in the AT class.

[Failure to solve the problem]

The earthing switch for a three-phase all-in-one gas insulated switchgear according to the present invention has a conductor connected to the phase conductor located at the apex of a triangle.
and the line connecting the U and W phase conductors to the V
(2) A phase fixed side contact is provided at the tip of the connecting conductor located symmetrically with the phase conductor.

[For production]

In the present invention, for the two types of conductor arrangements, the movable side of the grounding switch uses the same short movable contact to bring each phase conductor to the ground potential.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show one embodiment of the present invention, and the same or corresponding parts as in FIGS. 3 to 6 are designated by the same reference numerals, and the explanation thereof will be omitted. In the figure, each phase conductor (2)
The arrangement of (lr)(+) is the same as that of the prior art example described above. The V-phase conductor (ig) located at the apex of the triangle has a connecting conductor (21) housed in the same direction as the U- and W-phase movable contacts (51 (ri)). 1 (directly opposed by connecting &l.

In the earthing switch configured as described above, the V-phase fixed-side contact (22) is the same as the conventional tin V-phase fixed-side contact (3a) shown in FIG. Therefore, in contrast to the two types of conductor arrangement on the fixed side, the movable side of the earthing switch can use the seventh conventional example, and the short V-phase movable contact (6) connects the V-phase conductor. (1g) can be brought to ground potential.

〔Effect of the invention〕

As described above, according to the present invention, the connecting conductor is attached to the phase conductor located at the apex of the triangle, and the tip of the connecting conductor is located symmetrically with the V phase conductor with respect to the straight line connecting the U and W phase conductors. Since a V-phase fixed-side contact is provided on the fixed side, only one type of conductor is required on the movable side compared to the two types of U, V, and W-phase conductor arrangements on the fixed side, and the manufacturing process of the grounded υ6 switch is It is simple and costs are reduced. In addition, the length of the phase (1) movable contact is short and the scale interval is reduced, resulting in excellent operating characteristics and reduced burden on the shaft and lever.

[Brief explanation of drawings]

FIG. 7 is a front sectional view showing one embodiment of the present invention, FIG. 2 is a side sectional view of FIG. 1, FIG. 3 is a front sectional view showing a first example of a conventional earthing switch, and FIG. 3 is a side sectional view of FIG. 3, FIG. 5 is a front sectional view showing a second example of a conventional earthing switch, and FIG. 6 is a side sectional view of FIG. S. (1)...Fixed side grounding tank, (C)...U phase conductor, (
Cap...W phase conductor, (7g)...V phase conductor, (/q)...
In each figure, the same reference numerals indicate the same or corresponding parts. Agent Teru Sogado □（・〜゛・
7.1: Figure 1, figure 2, figure 1, solid, J, double, 2, U phase conductor 4, W phase conductor 18: Va body 22, ■Fixed side contact + 21, with contact IkS,

Claims (1)

[Scope of Claims] U and W phase conductors housed in the fixed side grounding tank and located at both ends of the base of the triangle; and a V phase conductor housed in the fixed side grounding tank and located at the apex of the triangle. and a connecting conductor that is attached in a vertical direction to the V-phase conductor and has a V-phase fixed-side contact at its tip that is symmetrical to the V-phase conductor with respect to the base, Grounding of a three-phase all-in-one type gas insulated switchgear, characterized in that the phase fixed side contact is configured to be able to make contact with and separate from the V-phase movable contact, which is provided on an extension line of the connection conductor and has a ground potential. switch.