JPS59112520A - Vertical breaker - 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 [Field of Application of the Invention] The present invention relates to a vertical breaker, and particularly to a vertical gas breaker used for gas insulated switchgear.

[Prior art]

A conventional vertical gas breaker for gas insulated switchgear is shown in FIG.

On one side of the vertical sealed container l, there is a pair of branch pipes 1a and lb arranged vertically, and each branch has a conductor pipe 2a.
, 2b are connected. The two are separated gaseously by insulating spacers 3a and ab, respectively. The upper end of the sealed container 1 is hermetically sealed by an end cap IC, and a fixed contact 6 is fixed to the end cap 1c via an insulating support 4 and a conductor 5. The lower end of the sealed container 1 is the mechanism case 7
An insulating support 8, a conductor 9, and a piston support cylinder 1o are fixed to this mechanism case 7. A movable part consisting of a cylinder 11, a movable contact, etc. is supported by the piston support cylinder 1o.

The breaker consisting of the fixed contact 6, movable contact (not shown), etc. is a well-known buffer type.

A connecting conductor 13 connected to the center conductor 12 of the insulating spacer 3a is connected to the conductor 5. The conductor 9 also has a connecting conductor 15 connected to the center conductor 14 of the insulating spacer 3b.
is connected. In this manner, one pole of the breaker, the fixed contact 6 side, is led out as the center conductor 12, and the other pole, the movable contact side, is led out as the center conductor 14.

A capacitor 16 for adjusting the restart voltage is installed around the breaker.
are arranged at equal intervals on the circumference. The axial length of this capacitor 6 is made smaller than the distance between the connecting conductors 13 and 15, and they are arranged at approximately equal intervals on the circumference.

The disadvantage of such a gas breaker is that when it is assembled into a gas insulated switchgear as shown in FIG. Therefore, the conductor tube 2a, which has a useless axial length and is used only for crossing, is required.

Further, since the sealed container 1 has branch pipes 1a and 1b on the upper and lower sides of one side, the height increases in terms of manufacturing.

[Purpose of the invention]

The object of the present invention is to be able to shorten the axial length of a conductor tube,
Another object of the present invention is to provide a vertical gas breaker with reduced height.

[Summary of the invention]

In the present invention, a vertical gas breaker is constructed by leading out both ends of the breaker section at substantially the same level and in opposite directions. In such a gas breaker, the connecting conductor that connects the two poles of the breaker part and the center conductor of the conductor tube has a complicated shape, which disturbs the potential distribution between the connecting conductor and the sealed container, causing damage to the insulation. cause problems.

The present invention is characterized in that the above-mentioned vertical gas breaker is constructed by taking this point into consideration.

[Embodiments of the invention].

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

FIG. 3 shows a gas insulated switchgear employing the vertical gas breaker of the present invention, in which branch pipes 1a and 1b are formed on both sides of the sealed container 1 of the gas breaker in opposite directions at approximately the same level. A main bus bar 18.19 is connected to the branch pipe 1b via a disconnector 20.21'. A cable pend 17 is connected to the branch pipe 1a.

With this configuration, as can be seen from a comparison with FIG. 2, the height of the gas breaker can be suppressed, and the conventionally long conductor tube 2a can be significantly shortened.

Next, the gas breaker will be explained using FIG. 4.

The upper end of the sealed container 1 is hermetically sealed by an end cap IC, and a support plate 22 is fixed to the sealed container 1 separately from the end cap IC. An upper mounting plate 50, a fixed contact 6, etc. are supported and fixed to this support plate 22 via an insulating support 4. The upper mounting plate 50 exists on a plane perpendicular to the central axis of the sealed container 1. An insulating support 8 fixed to the mechanism case 7 supports and fixes a lower mounting plate 90, a pair of which is substantially parallel to the upper mounting plate 50, a piston support cylinder 10, and the like. A cylinder 11 and a movable contact (not shown) are movably supported by the piston fixed to the piston support cylinder 10. The movable contacts etc. are opened and closed up and down on the central axis of the sealed container 1 or on an axis parallel to this by a link mechanism in the mechanism case 7. A shield cylinder 23 for mitigating the electric field is provided on the outer periphery of the pair of mounting plates 50°90.
24, and these shield cylinders are fixed to appropriate members nearby.

The space between the branch pipe 1b and the conductor pipe 2b of the sealed container 1 is hermetically sealed by an insulating spacer 3b. Similarly, branch pipe 1a
and the conductor tube 2a are hermetically sealed by an insulating spacer 3a.

An inspection port 25 is formed below the branch pipe 1b on the side of the sealed container 1, and is sealed with a removable lid 26. Lid 2
An adsorbent 27 is fixed on the inner surface of 6.

It can be noted that the connecting conductor 150 in the branch pipe lb located on the inspection port 25 side has one end connected to the center conductor 14 and the other end connected to the upper mounting plate 50. This is because, as will be described later, the connecting conductor 150 does not become an obstacle when determining the damage state of the contact through the inspection port 25. A connecting conductor 130 in the branch pipe 1a on the opposite side from the inspection port 25 is connected to the gold center conductor 12 at one end and to the lower mounting plate 9o at the other end.

Furthermore, the following points are taken into consideration when attaching both the connecting conductors 130 and 150. This increases the dielectric strength between the bases 28 and 29 of the branches in the sealed container 1. The first point for this is that the connecting conductors 130 and 150 are crushed into an oval shape, thereby forming the connecting conductor 13o.

The insulation distance between the connecting conductors 150 and the bases 28 and 29 is increased, and at the same time, the connecting conductors 130 and 150 can be easily deformed into a clean, slightly curved shape as shown in the figure. However, this first point is secondary to the next second point. A connecting conductor 13o serves as the second point of the tab.

150 has a connection side with the upper and lower mounting plates 50.90 formed into a smooth curve so as to be substantially parallel to the straight line connecting the upper and lower mounting plates. The direction of the curve is the connection conductor 150
The end of the connecting conductor 130 contacts the lower surface of the upper mounting plate 5o.
The end of the lower mounting plate 9o is in contact with the upper surface of the lower mounting plate 9o. As a result, a sufficient insulation distance can be ensured between the connecting conductor 130.150 and the base 28.29. Connection conductor 130, 150
In order to facilitate the connection with the upper and lower mounting plates 50.90, a boxwood 30.31 is formed at the connecting end, and this collar and the upper and lower mounting plates are brought into surface contact and tightened with bolts (not shown). There is.

The above-mentioned second advantage becomes clear when comparing the connection between the connecting conductor 130.degree. 150 and the upper and lower mounting plates 50,90 using the conventional connection shown in FIG. In the case of such a connection, the center conductor 14, the conductor tube 2bf
! : Formed by shifting upward, center conductor 12, conductor tube 2a
must be formed by shifting it downwards, resulting in
Branch pipe 1a.

It will be difficult to form 1b gold at almost the same level, or the dielectric strength will be lowered.

FIG. 5 shows a capacitor 16 and a connecting conductor 1 which are fixed and electrically connected between the upper and lower mounting plates 50 and 90 in FIG.
30, 150 and the relationship between the inspection port 25.

The feature of this configuration is that the connecting conductors 130, 150 and the capacitor 16 are arranged on the same circular center as shown in FIG. This is so that they are juxtaposed. Therefore, the branch pipe 1a.

The capacitor 16 is arranged on the side of the sealed container 1, avoiding the 1b, forming a substantially U-shape, and the connecting conductor 130,
150 will invade.

In other words, the capacitors 16 are arranged so as to be concentrated on the left and right sides of the straight line connecting the branch parts, leaving a relatively large gap on the side corresponding to the branch pipes 1a and 1b. If the capacitor 16 has sufficient capacity only in the upper part in FIG. 5, the lower part may be omitted, or
Insulating rod and capacitor 16 that mechanically connect between 0 and 90
may be arranged side by side on approximately the same circumference. Especially in the latter case,
It makes it possible to omit the insulating support 4. Further, a closing resistor device can be placed in parallel to the capacitor 16.

With this configuration, the connecting conductor 150 does not become an obstacle when checking the state of the contact through the inspection port 25, and there is no need to create a space between each of the salient bodies of the capacitor 16 for inspection. There isn't.

These effects′? f:+='' In another embodiment, an inspection hole can be formed in the side wall of the sea container 1 above the branch pipe 1a. If the number of contacts is 8, remove the terminal IC, push the jig all the way through the opening of the support plate 22, disconnect the capacitor 16 and connecting conductor 150 from the upper mounting plate 50, and then mount the upper part. The plate 50 and the fixed contact 6 are taken out of the sealed container 4.

In the embodiment described above, a pair of upper and lower mounting plates 50.9
0 is illustrated as a simple flat plate, but 9 is a combination of two plates, one for mounting the capacitor 16 and the other for connecting conductors 130, 150, and formed into a dish-like shape. It's also beautiful. Further, the branch pipes 1a and 1b do not necessarily have to be on the same level, and can be applied even if they are shifted vertically by the diameter of the branch pipe, and can be applied not only to the ``1 fc gas breaker but also to other circuit breakers.

As explained above, in the present invention, the capacitor is placed between a pair of upper and lower mounting plates, and the connecting conductors are fixed to the opposing surfaces of the upper and lower mounting plates, respectively. It is possible to obtain sufficient dielectric strength between the

Further, in the present invention, since an inspection port is formed below the branch pipe having the connecting conductor 150 connected to the upper mounting plate, inspection of the contact can be performed without the connecting conductor 150 or the capacitor getting in the way.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a conventional vertical gas breaker, Fig. 2 is a front view of a gas insulated switchgear using the gas breaker of Fig. 1, and Fig. 3 is a longitudinal sectional view of a conventional vertical gas breaker. FIG. 4 is a longitudinal cross-sectional view of a vertical gas breaker according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view of FIG. 4.

Claims (1)

[Claims] 1. A breaker having a contact that opens and closes in the vertical direction is housed in a vertical sealed container, a pair of branch pipes are formed on the sides of the sealed container, and a pair of branch pipes are formed in the side of the sealed container. In the vertical breaker, the conductor pipes are connected to each other, the center conductors of the side conductor pipes are respectively connected to the contacts of the breaker section via connecting conductors, and a capacitor is connected between the contacts. The branch pipes are formed to extend in opposite directions at substantially the same level, and the breaker has an upper mounting plate and a lower mounting plate that are connected to the contacts and are arranged opposite to each other, and the capacitor is connected to both the contactors. It is installed between the upper mounting plate and the lower mounting plate except for the part facing the branch pipe, one of the connecting conductors is fixed to the lower surface of the upper mounting plate, and the other connecting conductor is fixed to the upper surface of the lower mounting plate. A vertical breaker characterized by being fixed. 2. A sheath section having a contact element that opens and closes in the vertical direction is housed in a vertical sealed container, a pair of branch pipes are formed on the sides of the sealed container, and a conductor pipe is connected to each of the branch pipes. In a vertical breaker in which the center conductors of the side conductor pipes are connected to the contacts of the breaker section through connecting conductors, and a capacitor is connected between the contacts, the branch pipes are approximately The breaker is formed to extend in opposite directions at the same level, and the breaker has an upper mounting plate and a lower mounting plate that are connected to the contact and are arranged opposite each other, and the capacitor is connected to both branch pipes. It is installed between the upper mounting plate and the lower mounting plate except for the opposing part, and an inspection port is formed at the bottom of one of the branch pipes of the sealed container and is covered with a removable cocoon, and above the inspection port. A vertical breaker characterized in that the connecting conductor passing through the branch pipe is fixed to the lower surface of the upper mounting plate, and the other connecting conductor is fixed to the upper surface of the lower mounting plate.