JPS6188415A - 3-phase package type gas 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 an improvement of a three-phase integrated gas circuit breaker in which the shut-off parts for each of the three phases are housed in a grounded closed tank.

[Background of the invention]

A three-phase integrated gas circuit breaker has a cut-off section for each phase housed in an independent insulating tube, and these cut-off sections are placed in a single common tank that is at ground potential. configured. This type of three-phase gas circuit breaker was developed in Japanese Patent Application Laid-open No. 56-11.
It is described in Publication No. 4231.

9 and 10 show a conventional example of this type of three-phase integrated gas circuit breaker. 1 is a grounding tank that houses the interrupting parts 50 for each of the three phases, U phase, ■ phase, and W phase. , and the frame 1α
supported above. Reference numeral 15 is an operating device attached to this frame 1α, and the operating force of this operating device 15 is equal to the shielding If of each phase.
It is W-shaped so that it is transmitted to the r section via the link mechanism 11.

The cutoff parts 50 for each of the three phases are installed on the upper part of the pedestal 1α and are arranged at approximately 120° intervals facing the inside of the grounded tank 1. The structures of the cut-off parts 50 for each phase are almost the same, but for example, in the W-phase cut-off part 50W, 2W is a fixed contact, 4W is a movable contact that approaches and separates from this, and both of these The contactors 2w and 4w form a pair of W-phase contactors that can be engaged and separated. 6W is an insulator nozzle provided surrounding the movable contactor 4W concentrically Ff[C and attached to the buffer cylinder 51W. 52W is buffer cylinder 5
It is a fixed piston fitted with 1W.

A shaft connected to the buffer cylinder 51W is connected to the link mechanism 11 and the operating device 15 via an insulated operating rod 6W. 13W is an insulating cylinder that houses the W-phase interrupting part, and is an interpole support that fixes the fixed contact 2W at the upper part and supports one end of the fixed piston 52W at the lower part, and also serves as an isolation tube between the t-th points. It also functions as a body. The entire fixed part described above is mounted on the pedestal 1α with a hollow support D27W? It is attached to the top of the via. 10W is @kihaku ensu 1
Auxiliary containers 8W and 9W on the exhaust side provided on the end side of the fixed contact 2W above 3W are terminal conductors drawn out from the interrupting portion 50W.

Figure 10 is a cross-sectional view taken along line A-A in Figure 9.
The four sections 50U, 507, and 50W of each phase are arranged in the grounded tank 1 at approximately 120° intervals.

By the way, this type of three-phase-disposable gas barrier + gr device has conventionally
The insulating cylinder 13 (U, V, W) that houses the interrupting part 50 (U, V, W) is mostly used for the buffer cylinder 5, which is adopted in rock species and classes where the rated voltage and rated breaking current are not large.
1 (U, V, W) with an inner diameter close to the outer diameter.

On the other hand, in recent gas-insulated switchgears used in ultra-high voltage, large-capacity substations, switchyards, etc., the main bus bar, branch bus bar, etc. are now being configured as a three-phase all-in-one type, and gas circuit breakers are also being configured in three-phase all-in-one types. There is a request to configure it into a mold.

In order to meet this demand, when applying the above-mentioned three-phase bulk gas circuit breaker to an ultra-high pressure, large-capacity vessel, we will address the problem of installation space for a parallel capacitor between poles, which is necessary to ensure circuit breaking performance. , it becomes difficult to secure enough storage space for the interrupter, which is necessary for high voltage and large capacity. In other words, in order to secure the required space with a conventional cylindrical insulating container, it becomes a large circuit breaker with an extremely poor space factor, and when applied to gas-insulated switchgear, it is necessary to downsize the entire device. There are drawbacks that have a negative impact on

[Purpose of the invention]

The object of the present invention is to eliminate the drawbacks of the prior art mentioned above, increase the space occupied in each rejection insulation insulator arranged in a grounded tank, and enlarge the gas space in the area where the shut-off part is accommodated to provide sufficient Compact, ultra-high pressure that maintains breaking performance.
Our objective is to provide a large capacity three-phase bulk gas circuit breaker.

[Summary of the invention]

In order to achieve this object, the present invention provides a wall portion that partitions gas between each of the three adjacent phases as an insulating insulating body that individually accommodates the cutoff portions of each of the three phases, and a grounding portion that houses the cutoff portions of each of the three phases. It is characterized in that it is configured to include a curved wall portion that substantially follows the curved surface of the inner wall of the tank, and if necessary, an interpole parallel capacitor of each phase is embedded in the insulating separator. .

[Embodiments of the invention]

Hereinafter, each example of the present invention will be explained in detail with reference to FIGS. 1 to 8. In addition, in Fig. 1 to Fig. 8, Fig. 9, Fig. 1
The same reference numerals as in Figure 0 indicate the same or equivalent parts.

In the embodiment shown in FIGS. 1 and 2, the cutoff section 5 of each phase
Insulating isolation body 23U, 2 that accommodates 0U, 50V, 50W
3V, 23W)! Each of these insulating isolation bodies 23U is formed into a hollow cylindrical body having a Xi-shaped cross section.

The wall portion α facing the inner surface of the ground tank 1 in 23V and 23W is formed into a curved surface that follows the curved surface of the inner wall of the ground tank 1. Further, the wall portions between adjacent phases are formed so as to face each other in a substantially Y shape. According to this embodiment, as shown in its cross section in FIG.
The gas space inside can be used effectively, and the gas volume accommodating the cutoff part 50 can be expanded. Therefore, the high-temperature gas generated in connection with the cutoff operation is absorbed to some extent within the insulating separator 26 and then discharged from the auxiliary container 10 into the grounded tank 1, so that a large current cutoff process is performed. be able to.

In the embodiment shown in FIGS. 3 and 4, the insulating insulating body 33 is formed so that the cross-sectional shape of the insulating insulating body is spherical.
U, 33V, and 33W, and the wall portion α facing the inner surface of the ground tank 1 is formed into a curved surface that follows the curved surface of the hollow inner wall of the ground tank 1, as in the above embodiment.

Also, the wall portion between each adjacent phase is formed into a substantially flat surface. Also in this embodiment, the gas volume in which the cutoff section 50 is accommodated can be expanded by effectively utilizing the gas space within the grounded tank 1, and the cutoff capacity can be improved in a limited space.

By the way, in an ultra-high pressure, large capacity gas circuit breaker, 1
In order to increase the breaking capacity per breaking point, parallel capacitors are inserted between the poles.

Figures 5 to 8 show the insulating separator 23.3 of each of the above embodiments.
An example is shown in which this parallel capacitor is embedded in 3.

The embodiments shown in FIGS. 5 and 6 correspond to the embodiments shown in FIGS. 1 and 2 described above, and the embodiments shown in FIGS. 7 and 8 correspond to the embodiments shown in FIGS. 3 and 2 described above. This corresponds to the embodiment shown in FIG.

In any of these embodiments, the inter-electrode parallel capacitors 14U, 14V, 14W, etc. are of ceramic type, and the wall portion α of the insulating separator 23.33 is formed thick, and is buried along this wall portion α. .

In this way, even if the parallel capacitor 14 is inserted between the poles,
Sufficient gas space can be secured within the insulating insulating body 26'56 that accommodates the interrupting part 50, and the interrupting capacity can be further increased by the capacitor.

〔Effect of the invention〕

According to the present invention, the gas space in the cutoff section for each phase can be enlarged by effectively utilizing the protrusion in the grounded tank, thereby providing a clean, ultra-high pressure, large capacity three-phase disposable gas circuit breaker. be able to.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a vertical cross-sectional view showing an embodiment of the three-phase disposable gas circuit breaker of the present invention, and Fig. 2 is a cross-sectional view taken along line IF-1 in Fig. 1. , FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention,
4 is a cross-sectional view taken along line IV-P/ in FIG. 6, FIGS. 5 and 7 are longitudinal sectional views showing still other embodiments of the present invention, and FIGS. 6 and 8 are Cross-sectional views taken along the WM line in Figure 5 and the ■-■ gland in Figure 7, Figures 9 and 10, respectively.
The figure shows the configuration of a conventional three-phase disposable gas circuit breaker.
FIG. 9 is a longitudinal cross-sectional view thereof, and FIG. 10 is a cross-sectional view taken along line A-A in FIG. 9. 1...Grounding tank, 2 (U, V, W)...Fixed contact, 3 (U, V, W)...Insulating nozzle, 4 (U
,V. W)... Movable contact, 50 (U, V, W)... Shutoff part, 51 (U, V, W), - Buffer cylinder, 52 (U, V, W) ・[Constant piston, 23 (U
, V, W). 33 (U, V, W)...Insulating separator, α, b...
wall part. Figure 1 Figure 2 Figure 3 Section 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] 1. A pair of contacts that can be moved toward and away from each other, and an insulating nozzle that sprays and guides arc-extinguishing gas to an arc that is generated as the pair of contacts move relative to each other. A grounded, approximately cylindrical insulating body for each of the three phases, which houses a blowing pressure generating unit that increases the arc-extinguishing gas pressure as the contactor opens and closes, is made up of a piston and a cylinder. In the case where the insulator is installed in a common tank, the insulator includes a wall portion that partitions gas between each of the three adjacent phases, and a curved wall portion that substantially follows the curved surface of the inner wall of the tank. A three-phase integrated gas circuit breaker. 2. The three-phase integrated gas circuit breaker according to claim 1, characterized in that a parallel capacitor connected in parallel between the pair of contacts is embedded in the insulator of each of the three phases. 3. The three-phase all-in-one gas circuit breaker according to claim 1, wherein the insulators for each of the three phases have an inner cross-sectional shape substantially fan-shaped. 4. The three-phase all-in-one gas circuit breaker according to claim 1, wherein the insulators for each of the three phases have an inner cross-sectional shape that is approximately spherical. 5. The three-phase integrated gas circuit breaker according to claim 2, wherein the parallel capacitor is embedded in a wall portion of each phase insulator facing the tank.