JPS63285831A - Three-phase incorporated gas breaker - Google Patents

Abstract

PURPOSE:To reduce the length of axis of a common tank and to make the size of a breaker smaller by installing drawing-out conductors to installing plates with exhaust ports while installing fixed contact makers avoiding the exhaust ports. CONSTITUTION:To each of installing plates 12U, 12V, and 12W, an approximately Y-shape seat of a fixed contact maker is installed, and exhaust ports 12Ua, 12Va, and 12Wa to exhaust the hot gas after contributing to the extinction of arc are formed respectively. At the upper side of the installing plates 12U, 12V, and 12W, the other ends of drawing-out conductors 8U, 8V, and 8W are connected directly, and they are fixed to the installing plates 12U, 12V, and 12W, avoiding the exhaust ports 12Ua, 12Va, and 12Wa in order not to block the ports. As a result, a sufficiently large gas space is secured at the down stream side of the hot gas of each phase of the installing plates 12U, 12V, and 12W, while the exhaust capacity from the exhaust ports is improved. Consequently, a conventional exhaust tube is not necessary, and the length of axis of the common tank 1 can be reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a three-phase bulk gas circuit breaker, and particularly relates to a three-phase bulk gas circuit breaker with an improved connection structure between the fixed contact side of each phase interrupting part and the lead-out conductor. Regarding circuit breakers.

[Conventional technology]

In general, a three-phase bulk gas circuit breaker is constructed by housing three-phase cutoff parts in a common tank, and an insulating spacer is used to seal a pair of four radially formed parts at both axial ends of the common tank. The center four bodies of both box edge spacers and both ends of each phase cut-off part are connected by a lead-out conductor.

Such a three-phase bulk gas circuit breaker is disclosed in, for example, Japanese Patent Application Laid-Open No. 1986-
This is shown in Publication No. 88415.

are shown in FIGS. 7 and 8.

FIG. 7 is a longitudinal sectional view, and the common tank l is arranged vertically, and a pair of lead-out parts are formed above and below both ends in the axial direction, and these lead-out parts are usually sealed with insulating spacers (not shown). SF6 gas or the like is sealed inside. Inside this common tank 1, as particularly shown in FIG. 8, which is a cross-sectional view taken along line A-A in FIG. 7, there is a three-phase cutoff section 50U.

50V and 50W are arranged so as to be located at each vertex of a virtual triangle. Since each phase cutoff part has the same structure, W
The phase blocking portion 50W will be briefly explained.

The lower ends of the piston 52W and the insulating cylinder 13W are fixed via an insulating support 7W fixed to the lower part of the common tank 1. A buffer cylinder 51W is slidably fitted to the piston 52W to constitute a compression device. A movable contact 4W and an insulating nozzle 3W surrounding the movable contact 4W are attached to the buffer cylinder 51W. Insulating tube 13
A fixed contact mounting member 12W is fixed to the upper end of W, a fixed contact 2W is fixed to the lower surface of this mounting member 12W, and an exhaust pipe 10W is fixed to the upper surface of the mounting member 12W.

The mounting member 12W also has an exhaust hole, and the hot gas that has contributed to arc extinguishing is guided into the exhaust pipe 10W through this exhaust hole, cooled by the exhaust pipe 10W, and discharged from the upper end. Output conductor 8U, 8V.

8W is configured almost horizontally and linearly, and its right end is electrically connected to the exhaust pipe 10U, IOV, and IOW.

The movable contact 4W is driven downward via the insulated operating rod 6W by the operating device 15, the details of which are omitted, and the fixed contact 2
It separates from W to generate an arc, and a compressor blows high-pressure gas onto the arc. The hot gas that contributed to the arc extinguishing passes through the opening of the mounting member 12W to the exhaust pipe 10.
It reaches inside W, where it is cooled and discharged.

[Problem that the invention seeks to solve]

The conventional three-phase bulk gas circuit breaker has each shutoff section 50 as described above.
Exhaust pipe 1 in the axial direction on the fixed contact side of U, 50V, 50W
Since the configuration includes 0U, IOV, and IOW, each interrupting part is completely affected by the hot gas that contributed to arc extinguishing against the interphase insulation.
Although this does not affect the length of the common tank 1, it becomes longer in the axial direction, and the axial length of the common tank 1 is determined taking into consideration the distance from the top of the exhaust pipe 10U, IOV, and IOW.
The disadvantage was that the axial length of the

An object of the present invention is to provide a three-phase collective gas circuit breaker that is downsized by shortening the axial length of a common tank.

[Means for solving problems]

In order to achieve this object, the present invention directly connects one end of a lead-out conductor led to the lead-out part to a mounting plate having an exhaust hole to which a fixed contact is attached, and also allows the lead-out conductor to avoid the exhaust hole. It is characterized in that it is attached to the above-mentioned mounting plate.

[Effect]

Since the present invention is configured as described above, by directly attaching the lead-out conductor to the mounting plate, the gas space formed above the mounting plate can be effectively used for releasing hot gas, and the axial length of the cut-off part can be made smaller, so a three-phase collective gas circuit breaker with a shortened common tank axial length can be obtained.

〔Example〕

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

FIG. 1 is a cross-sectional view of a three-phase collective gas circuit breaker, and FIG. 2 is a longitudinal cross-sectional view thereof. The common tank 1 has lead-out portions 1a and lb led out in different radial directions at both ends in the axial direction, and these lead-out portions 1a and lb are hermetically sealed by insulating spacers 14.11. SF in common tank 1
, a three-phase cutoff section 50U filled with gas, etc., and having almost the same structure.

50V and 50W are placed side by side. Now, to explain the optional cut-off part 50U using FIG. 1, the cut-off part 50U is
The entire U is supported. A piston 52U is fixed to the upper end of the insulating support 7U, and a buffer cylinder 51U is slidably fitted to the piston 52U, and both constitute a compression device. When the buffer cylinder 51U is driven downward via the insulated operating rod 6U by the operation device 15, the details of which are omitted, the compression device compresses the SF & gas inside and obtains gas by high-pressure spraying.

A movable contact 4U and an insulating nozzle 3U surrounding the movable contact 4U are attached to the buffer cylinder 51U, the movable contact 4U moves toward and away from the fixed contact 2U forming a pair, and the insulating nozzle 3U injects high-pressure gas. Both contacts 2U, 4U
It guides against the arc that occurs due to the separation between the two. The fixed contact 2U is attached to a mounting plate 12U having an exhaust hole 12U.

One end of the lead-out conductor 8U is connected to the back surface of the mounting plate 12U, avoiding the exhaust hole 12U8, and the other end of the lead-out conductor 8U is connected to the center conductor of the insulating spacer 14. Therefore, this lead-out conductor 8U is connected to the common tank 1 on the fixed contact 2U side.
The axial direction, that is, the spraying direction, is approximately L-shaped with one end extending in the gas flow direction and the other end bent at right angles to this one end. Further, one end of the insulating shield 13U is fixed to the lower surface side of the mounting plate 12U, and the other end is fixed to a fixed member such as a piston 52. As shown in FIGS. 1 and 2, this insulating shield 13U is provided at the opposing portion of each river break, and the hot gas that has contributed to the arc extinguishing of each phase casts a shadow on each other, causing the gap between the phases. This prevents dielectric breakdown from occurring.

On the other hand, the lead-out conductors 9U, 9V, and 9W, which have one end connected to the movable contact side of each interrupting part, extend almost linearly in the radial direction of the common tank 1, as shown in FIG.
It is connected to the center conductor of 1.

Here, the lead-out conductors 8U, 8V, 8W at each river crossing section
The relationship between the mounting plates 12U, 12V, and 12W will be described in detail with reference to FIG.

The insulating spacer 14 that seals the upper lead-out portion 1a of the common tank 1 has a center conductor at each vertex of an isosceles triangle, and one ends of the lead-out conductors su, sv, and sW are connected to this center conductor. On the other hand, the blocking section 50U.

50V and 50W are arranged at each apex of a substantially equilateral triangle with its apex facing the insulating spacer 14, and are represented by mounting plates 12U, 12V, and 12W in the figure. A substantially Y-shaped seat for a fixed contact is attached to the lower surface of each of the mounting plates 12U, 12V, and 12W, and an exhaust hole 12 is provided to release the hot gas after it has contributed to arc extinguishing.
U, , 12V, , 12Wa are formed. Mounting plate 1
Output conductor 8U, 8V on the top side of 2U, 12V, 12W,
The other end of the lead conductor 8W is directly connected to the exhaust hole 12U, 12V.

Mounting plate 12U without sealing it avoiding 12W8.

It is fixed at 12V, 12W-. Moreover, since the other ends of the lead-out conductors 8U, 8V, and 8W extend somewhat linearly in the hot gas flow direction, the insulating spacer 1
One end, which is the connection side with 4, is the exhaust hole 12U.

Even if it is located above the hot gas, it does not substantially prevent hot gas from being discharged. Furthermore, the drawer conductor is 8U, 8V.

If you look at the mounting part of the 8W mounting plate 120.12V and 12W, as you can see from Figure 1, it is the part that faces the other phases, and it follows the hot gas flow of the lead-out conductors 8U, 8V, and 8W. The other end portion, which extends substantially linearly, acts to prevent the hot gases in each river break from interfering with each other. To further enhance this effect, the other end portions of the lead-out conductors 8U, 8V, and 8W can be flattened to prevent hot gas from flowing toward the opposing portions.

In this way, each phase mounting plate 12U, 12V, 1
By securing a sufficiently large gas space on the downstream side of the 2W hot gas and increasing the exhaust capacity from the exhaust holes 12U, 12V, and 12Wa, the hot gas that contributed to arc extinction is cooled in this gas space. Restore the density that had been reduced. Therefore, the conventional exhaust pipe is unnecessary, and the axial length of the common tank 1 can be shortened.

3 and 4 show a cross-sectional view and a longitudinal cross-sectional view of a three-phase collective gas circuit breaker according to another embodiment. Only the points that are different from the previous embodiment will be explained, and the same reference numerals will be given to the other components that are equivalent, and detailed explanation will be omitted.

In this embodiment, as can be seen from FIG.
The point where each river break part 50U, 50V, 50W is arranged at each vertex of an imaginary triangle whose base side is close to the insulating spacer 14 that seals the upper lead-out part 1a, and each phase lead-out conductor 8U, 8V , 8W and the mounting plate 12U, 12V, 12W are connected to the lead conductors 8U, 8V, rather than the opposing parts of each phase.
8W was shifted to shorten the length, and the exhaust hole 12
This differs from the previous embodiment in that it is performed directly without sealing U, , 12V, , 12W8. Therefore, the shapes of the lead conductors 8U, 8V, and 8W for each phase are also somewhat different from those in the previous embodiment. In particular, the lead conductor 8U of the cutoff part 50U of the phase farthest from the insulating spacer 14 is connected to the insulating spacer 14. The side end is not located above the mounting plate 12U, and the other phase blocking portion 50V,
It is placed well above 50W. Therefore, the insulation is not threatened by hot gas from the other phase cut-off parts 50V and 50W.

In this way, this embodiment can also achieve the same effects as the embodiments shown in FIGS. 1 and 2.

5 and 6 show a three-phase collective gas circuit breaker according to a further different embodiment. This embodiment differs from the previous embodiment only in that a pair of lead-out portions 1a+1b are formed vertically on the same side of the common tank 1.

〔Effect of the invention〕

SRJ Specification: (No change in content) As explained above, according to the present invention, the lead-out conductor whose one end is connected to the center donor of the insulating spacer that seals the lead-out portion formed in the radial direction of the common tank. The other end is connected to the mounting plate that supports the fixed contact, avoiding the exhaust hole of the mounting plate, so hot gas released from the mounting plate of each loose part can be disposed of in a sufficiently large gas space. By omitting the conventional exhaust pipe, a compact three-phase collective gas circuit breaker can be obtained in which the axial length of the common tank is shortened.

[Brief explanation of drawings]

1 and 2 are a cross-sectional view and a longitudinal sectional view of a three-phase bulk gas circuit breaker according to an embodiment of the present invention, and FIGS. 3 and 4 are three-phase bulk gas circuit breaker according to another embodiment of the present invention. A cross-sectional view and a longitudinal cross-sectional view of a circuit breaker, FIGS. 5 and 6 are a cross-sectional view and a vertical cross-sectional view of a three-phase bulk gas circuit breaker according to still another embodiment of the present invention, and FIG. 7 is a conventional three-phase gas circuit breaker. FIG. 8 is a longitudinal sectional view of the collective gas circuit breaker, and is a sectional view taken along the line A-A in FIG. 7. 1-----One common tank, 1 a, 1 b-
−−−−− Leading out part, 2U・・・・− Fixed contact,
4 U--Movable contact, 8U. 8 V, 8 W---- Single lead conductor, 12U, 1
2V, 12W------. Mounting plate, 12U, 12V, 12W, ---Exhaust hole, 14--Insulating spacer, 50U, 50
V, 50W----Shutoff section. Fig. 1 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Procedure Ne Iro Correct (Method) % Formula % 1 Indication of Incident Patent Application No. 118927/1982 2 Title of Invention 3 Phase bulk gas circuit breaker 3 Relationship with the case of the person making the amendment Applicant name (510) Hitachi, Ltd. 4 Agent 6 Specification subject to amendment (page 12) 7 Contents of amendment

Claims (1)

[Claims] 1. A fixed contact, a movable contact, a mounting plate on which the fixed contact is mounted, and a compression device that sprays high-pressure gas at an arc generated by separation between the two contacts. The three phases of the interrupting section having the above are housed in a common tank, and the central conductor of the insulating spacer that seals the lead-out section formed in the radial direction of the common tank is connected between the above mounting plate and each other by a lead-out conductor. In the three-phase collective gas circuit breaker, an exhaust hole is formed in the mounting plate of each phase to directly release the hot gas that contributed to arc extinguishing into the common tank, and A three-phase collective gas circuit breaker, wherein the mounting plate side is connected to the mounting plate while avoiding the exhaust hole. 2. The device according to claim 1, wherein the lead-out conductor of each phase has a portion extending substantially linearly in the flow direction of the hot gas at the end portion on the side of the mounting plate. Three-phase bulk gas circuit breaker. 3. In the product described in claim 2 above, the linearly extending portion of the lead-out conductor of each phase is attached to the mounting plate at a position facing each phase cutoff portion. A three-phase bulk gas circuit breaker characterized by the fact that they are connected to each other.