JPH0447530B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a three-phase common tank-type gas shield disconnector in which three-phase shields and disconnectors are housed in one tank.

[Background of the invention]

A conventional common tank type gas shield disconnector has a pair of upper and lower drawer openings 1, as shown in Fig. 4, for example.
A lead-out conductor 1 is housed in a tank 6 having wires 9 and 20, and is connected to one contactor 15.
7 is led out from the opening 19, and the lead-out conductor 18 connected to the other contactor 16 is led out from the opening 20 (Japanese Patent Publication No. 18291/1983). In this example, the lead-out levels of the lead-out conductors 17 and 18 are different, so when used as a breakout switch for a gas-insulated switchgear, the overall height increases, which is a drawback in terms of earthquake resistance.

On the other hand, the single-phase tank-type gas shield breaker disclosed in Japanese Utility Model Application Publication No. 58-91827 has openings 19 and 20 formed on the left and right sides as shown in FIG. It is derived using 18. The configuration shown in FIG. 6 is conceivable as a three-phase common tank type gas cylinder disconnector that takes advantage of this configuration.

In the figure, a pair of openings 19 and 20 are formed at almost the same level in the upper part of the tank 6, and the three-phase portions are arranged so that the openings and closing operations in the bow section are perpendicular to the line connecting the openings. has been done. The sheath section 3 is arranged behind the sheath section 2. All the lead-out conductors 17 connected to the stator 15 of each sheath section are connected to the opening 1.
On the other hand, all the lead-out conductors 18 connected to the mover 16 are led out from the opening 20 .

In such a configuration, the lead-out conductor 1 on the movable element 16 side
Insulation distance L ₁ between 8 and stator 15 in the open state,
Furthermore, in order to ensure a sufficient insulation distance _L2 between the lead-out conductor 18 and the tank 6, the diameter of the tank 6 had to be increased. Therefore, the method in which the drawer openings 19 and 20 at both ends of the sheath section are formed on the left and right sides of the tank requires that the diameter of the tank 6 be made larger than in the other method shown in FIG. .

[Purpose of the invention]

An object of the present invention is to provide a three-phase common tank-type gas tank and disconnector in which a pair of drawer openings can be formed on the left and right sides without increasing the diameter of the tank.

[Summary of the invention]

The present invention selects a three-phase lead-out conductor led out from one lead-out opening and a three-phase lead-out conductor led out from the other lead-out opening. The drawer conductors connected to the stator of the cut section were all led out as a set from one drawer opening, but the drawer conductors connected to the mover and stator were mixed and made into a set for three phases. It is characterized by being derived from an aperture.

[Embodiments of the invention]

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

FIG. 1 is a vertical cross-sectional front view of a three-phase common tank type gas shield disconnector to which the present invention is applied. The tank 6, which is filled with SF ₆ gas, is vertical, and drawer openings 19 and 20 are formed on the left and right sides above the tank 6 on substantially the same horizontal line. The drawer openings 19 and 20 are hermetically sealed by insulating spacers 7 and 10. Three-phase shear sections 1, 2, and 3 for opening and closing the movable element 16 approximately parallel to the axis of the tank 6 are supported within the tank 6 in an electrically insulated manner. For example, regarding the shingle section 2, the stator 15 is connected to the tank 6 by the insulating support 13 via the support conductor 5.
On the other hand, the mover 16 is slidably supported by a support conductor 21, which is fixed to the tank 6 by an insulating support 14.

Here, the relationship between each sheath section and the tank 6 will be described in detail with reference to FIG. The arrangement within the tank 6 is the drawer opening 20.
It is located at each vertex of an isosceles triangle with the base on the side facing .

Next, looking at the lead-out conductors, each sheath break is the lead-out conductor 8u, 8v, 8 connected to the stator 15.
w is led out from the drawer opening that is closer to each section. In other words, the drawer conductors 8v, 8w in the sheath sections 2, 3 on both sides of the bottom are the current collectors 22v, 2 at the drawer opening 20 facing the bottom.
It is led out by a conductor connected via 2w. On the other hand, the lead-out conductor 8u of the bow section 1 disposed at the apex of the isosceles triangle with respect to the base is led out by a conductor connected through the lead-out opening 19 via the current collector 22u. In addition, the movable element 16 of each shear section
Output conductors 9u, 9v, 9w electrically connected to
is led out from the drawer opening that is farthest from each side and section. In other words, the lead-out conductors 9v, 9w of the sheath sections 2, 3 placed on both sides of the base of the isosceles triangle are connected to the lead-out opening 19 on the opposite side of the base.
It is led out by a conductor connected via current collectors 23v and 23w. On the other hand, the lead-out conductor 9u of the sheath section 1 disposed at the apex relative to the base of the isosceles triangle is led out by a conductor connected via the current collector 23u at the lead-out opening 20.

As can be seen from the above explanation, conventionally all three-phase lead-out conductors connected to the stator were led out from one lead-out opening, and all three-phase lead-out conductors connected to the mover were led out from the other lead-out opening. In contrast, in this embodiment, the draw-out opening from which the draw-out conductor is led out is determined based on the positional relationship between the sheath cut portion and the draw-out opening. Therefore, all the lead-out conductors 9u, 9v, 9w connected to the mover have the same slope, and the insulation distance L ₁ between the stator 15 in the open state and the part at the same potential, and the tank 6 A sufficient insulation distance L ₂ can be ensured between the two, and as a result, the diameter of the tank 6 can be made smaller than that of the conventional example.

In the above embodiment, the drawer conductors 8u, 8v, 8w on the stator 15 side are connected to the drawer openings 19, 2.
I tried to derive it on a horizontal plane that is almost the same as 0, but
Since the lead-out openings 19 and 20 may be formed at a position slightly lower than that shown in FIG. 1, the lead-out conductor 8u only needs to have a substantially linear configuration.

FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention. In the previous embodiment shown in FIG.
In the embodiment shown in FIG. 3, an approximately L-shaped lead conductor 9 is connected between the support conductor 21 and the collector 23v
The lead conductor 9v has a portion that is almost parallel to the edge and the cut portion. Parallel capacitors 11 and 12 are connected between the support conductor 5 connected to the stator 15 and the lead-out conductor 9v. Specifically, a connecting piece 24 is attached to the supporting conductor 5, and one end of each parallel capacitor 11, 12 is fixed to the connecting piece 24. The parallel capacitors 11 and 12 are constructed by stacking capacitor elements in an insulating cylinder. The other two phase lead-out conductors 9u and 9w are similarly configured and have parallel capacitors attached thereto.

In this embodiment as well, the lead-out conductor 9v connected to the mover 16 is conducted from the lead-out opening 19 which is farther away from the edge and the cut-off portion. In other words, the three-phase bow section is placed at each vertex of an isosceles triangle whose base faces the drawer opening 20, and the drawer conductors 9v, 9w of the bow section are placed at the vertices on both sides of the base. is led out from the drawer opening 19, and the drawer conductor 9u of the folded section placed at the apex with respect to the base is drawn out from the drawer opening 20.
It is derived from

In the above embodiment, the case where the stator 15 is located above is described, but the movable member 16 is also applicable to a three-phase common tank type gas having a section where the movable member 16 is located above or a section where the movable element 16 is located above or a section where the movable element 16 is located above. The present invention can be applied to a breaker. In addition, when the drawer openings 19, 2 examples are formed corresponding to the connecting portions of the drawer conductors 9u, 9v, and 9w with the supporting conductor 21, the present invention provides the drawer conductors 8u, which are farther from both the drawer openings 19, 20, 8
This can be applied to v, 8w. As can be seen from this explanation, in order to easily ensure the insulation distance in one lead-out conductor, the present invention provides a method for distributing the insulation near the connection part of one lead-out conductor to the fold or break, for example, the connection part with the support conductor. and drawer openings 19, 20
By applying the present invention to a three-phase common tank-type gas shield and disconnector formed with the same structure, insulation can be easily obtained in both lead-out conductors.

〔Effect of the invention〕

As explained above, in the present invention, in deriving the drawer conductor on the side away from the drawer opening, the drawer conductor of the bow section placed at the vertices on both sides of the base of the isosceles triangle is The lead-out conductor of the shingle section, which is led out from the lead-out opening and placed at the apex of the base, is led out from the lead-out opening facing the base, so the lead-out conductor of each phase must be sufficiently insulated from other parts. As a result, a three-phase common tank-type gas tank and disconnector with drawer openings on the left and right sides can be obtained without increasing the diameter of the tank.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a three-phase common tank type gas shield disconnector according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the - line of FIG. FIG. 4 is a vertical cross-sectional view of a conventional three-phase common tank type gas shield disconnector, and FIG. 5 is a conventional single-phase tank type gas shield disconnector. FIG. 6 is a longitudinal sectional view of a three-phase common tank type gas sheath disconnector, which is a premise of the present invention. 1, 2, 3...sheath section, 6...tank, 8
u, 8v, 8w...drawer conductor, 9u, 9v, 9w
...Drawer conductor, 15...Stator, 16...Mover, 19, 20...Drawer opening.

Claims (1)

[Claims] 1 Three-phase shield sections are arranged side by side in a common tank filled with SF ₆ gas, and each interrupt section is connected to a pair of separable contacts and both contacts, respectively. A pair of lead-out openings are formed in the tank on a line substantially perpendicular to the direction of separation between the two contacts, and the three-phase shear cutout is connected to one of the three-phase lead-out openings. In a three-phase common tank-type gas shield and disconnector, which is arranged at approximately each vertex of an isosceles triangle whose base faces the drawer opening, and in which each of the drawer conductors is led out from both drawer openings, The opening is formed so as to be biased toward the connecting portion to the sheath break in one of the pair of lead-out conductors, and is located on the other side of the pair of lead-out conductors and at the base of the isosceles triangle. The drawer conductors of the folded sections arranged on both sides are led out from the drawer opening on the apex side with respect to the base, and the drawer conductors of the folded sections arranged on the other side of the pair of drawer conductors and at the apex with respect to the base are led out. A three-phase common tank-type gas shield and disconnector, characterized in that the lead-out conductor is led out from the lead-out opening facing the bottom side. 2. In the device described in claim 1 above, one of the pair of drawer conductors and a drawer conductor having a folded section disposed on both sides of the bottom side is connected to the drawer opening facing the bottom side. A three-phase common tank-type gas shield, characterized in that the lead-out conductor of the folded section, which is derived from the above-mentioned lead-out conductor and placed at the apex with respect to the base, is led out from the opposite lead-out opening. Disconnector.