KR910000074B1 - Three-phase combined type gas breaker - Google Patents

Abstract

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Description

3-phase integrated gas circuit breaker

1 is a longitudinal sectional view showing an embodiment of the three-phase batch gas circuit breaker of the present invention.

2 is a cross-sectional view taken along the line II-II of FIG.

Figure 3 is a longitudinal sectional view showing another embodiment of the present invention.

4 is a cross-sectional view taken along the line IV-IV of FIG.

5 and 7 are longitudinal cross-sectional views each showing yet another embodiment of the present invention.

6 and 8 are cross-sectional views taken along the line VI-VI of FIG. 5 and the VII-VII line of FIG.

9 and 10 show a configuration of a conventional three-phase collective gas circuit breaker, and FIG. 9 is a longitudinal sectional view thereof.

10 is a cross-sectional view taken along the line A-A of FIG.

The present invention relates to an improvement of a three-phase package type gas circuit breaker in which a blocking portion of each of the three phase phases is housed in a grounded closed tank.

The three-phase integrated gas circuit breaker is configured by accommodating a breaker for each phase in an insulated cylinder for each phase, and arranged in parallel in one common tank with the breaker at the ground potential. Such three-phase integrated gas circuit breakers are described in U.S. Patent Nos. 3,857,006, 4,417,111, or JP-A-56-114231, JP-A-56-118224, or JP-A-60-37625.

9 and 10 show a conventional example of this type three-phase package type gas circuit breaker, in which (1) shows the U-phase, V-phase, and W-phase breakers 50U, (50V). ) Is a grounding tank for storing 50W, and is supported on the support 1a. 15 is a manipulator mounted on the support 1a, and the operating force of the manipulator 15 is configured to be transmitted to the cutoff portions 50U, 50V, 50W of each phase through the link mechanism 11. have.

The shielding portions 50U, 50V, 50W of each of the three phase phases are installed on the upper part of the support la, and are disposed at approximately 120 ° intervals with respect to the inside of the ground tank 1. The configurations of the blocking portions 50U, 50V, and 50W of each phase are substantially the same, but, for example, the blocking portion 50W of the W phase is described as (2W) a fixed contactor, and 4W is a folding contact with this. I) Opposing movable contacts, and these two contacts 2W and 4W form a pair of foldable contacts on the W phase. Reference numeral 3W denotes an insulator row that surrounds the movable contactor 4W in a concentric shape, and the insulator nozzle 3W is attached to the buffer cylinder 51W. 52W is a fixed piston fitted to the buffer cylinder 51W. The shaft connected to the buffer cylinder 51W is connected to the link mechanism 11 and the manipulator 15 via the insulation operating rod 6W. 13W is an insulated cylinder for storing the W-phase blocking portion, and is a pole support that fixes the fixed contactor 2W at the upper portion, and supports one end of the fixed piston 52W at the lower portion thereof, and a phase-separated body (between phases). It has a function as a body. The whole fixing part is mounted on the upper part of the support stand la through a hollow support insulating cylinder 7W. 10W denotes an auxiliary container on the exhaust side provided at the end of the fixed contactor 2W of the upper portion of the insulated tube 13W, and 8W and 9W are terminal conductors drawn out from the breaker 50W.

FIG. 10 is a cross-sectional view taken along the line A-A of FIG. 9, showing a state in which the blocking portions 50U, 50V, and 50W of each phase are arranged in the ground tank 1 at intervals of about 120 degrees.

By the way, this type of three-phase integrated gas circuit breaker is conventionally employed by a model and a class in which the rated voltage, the rated breaking current is not large, and the breakers 50U, 50V, and 50W. Insulation cylinders 13U, 13V, and 13W for accommodating) are mostly small spaces having an inner diameter close to the outer diameters of the buffer cylinders 51U, 51V, and 51W.

On the other hand, in recent years, gas insulation switchgear used in ultra-high voltage, large-capacity substations, switching stations, etc. has a trend that a main bus and a branch bus are composed of a three-phase package. It is becoming. In order to respond to this request, when the three-phase integrated gas circuit breaker is applied to an ultra high pressure and a large capacity device, it is necessary for high voltage and large capacity in connection with the problem of the space for the installation of the inter-parallel parallel capacitor required for securing the breaking performance. It is difficult to secure a sufficient blocking portion storage space. That is, in the insulated cylinder which employ | adopted the conventional cylinder, the space required for accommodating a parallel parallel capacitor must be secured in the inside, and the diameter of an insulated cylinder becomes large. As a result, the grounding tank 1 which accommodates these insulation cylinders becomes large, and becomes a large-size circuit breaker with a very low dot ratio, and when applied to a gas insulated switchgear, it has a disadvantage that it adversely affects the reduction of the whole apparatus. There is this.

It is an object of the present invention to eliminate the drawbacks of the prior art, to increase the occupied space in the insulating transition body of each phase disposed in the ground tank, to enlarge the gas space of the area in which the breaker is accommodated to maintain sufficient blocking performance. To provide ultra-high pressure, high capacity three-phase integrated gas circuit breaker.

In order to achieve the above object, the present invention is an insulating isolation body which individually stores the blocking portions of each of the three phases, and a wall portion for gas-comparting each of the three adjacent phases, and a curved surface of the inner wall of the ground tank for storing each blocking portion ( It is comprised so that the wall part of the curved surface which may be substantially inclined may be provided, and it is comprised so that the interphase parallel capacitor of each phase may be embedded in the said insulating gap body as needed.

Next, each Example of this invention is described in detail according to FIG. 1 thru | or FIG. In addition, the same code | symbol as FIG. 9, FIG. 10 shows the same part, or equivalent part among FIGS.

In the embodiment shown in Figs. 1 and 2, the insulating isolation bodies 23U, 23V, and 23W accommodating the blocking portions 50U, 50V, and 50W of the respective phases have a fan-shaped cross section. The wall portion a facing the inner surface of the ground tank 1 in each of the insulating isolation bodies 23U, 23V, and 23W is approximately the inner wall of the ground tank 1. It is formed as a curved surface along the curved surface of the. Further, the wall portions b between the adjacent phases are formed to face substantially in a V shape so as to connect both ends of the wall portion a. According to this embodiment, as shown in the cross section in Fig. 2, the gas space in the ground tank 1 can be effectively used, and the gas containing each of the blocking portions 50U, 50V, and 50W is accommodated. The volume can be enlarged. Therefore, the high temperature ionizing gas generated by the blocking operation is absorbed to some extent in the insulating isolation bodies 23U, 23V, 23W, and then the auxiliary containers 10U, 10V, ( Since it discharges into the ground tank 1 from 10W), the interruption process of a large electric current can be performed.

3 and 4, the insulating isolation bodies 33U, 33V, and 33W are formed in the shape of a grain shape, as in the above embodiment. The wall portion a facing the inner surface of the ground tank 1 is formed into a curved surface that roughly follows the curved surface of the inner wall of the ground tank 1.

The wall portions b between the adjacent phases are formed in substantially flat surfaces so as to connect both ends of the wall portions a. In this embodiment as well, the gas space in the ground tank 1 can be effectively used to enlarge the gas volume for storing each of the blocking portions 50U, 50V, and 50W, thereby improving the breaking capacity in a limited space. We can plan. That is, even when a ground tank having the same diameter as in the prior art is used, the high temperature ionization gas at the time of short-circuit large current interruption is simply built up by the internal gas space inside the ground tank by the insulating isolation body of the fan-shaped cross section or the curved section. The cooling diffusion force is increased to improve the insulation recovery characteristics. Therefore, high capacity can be achieved at high voltage.

By the way, in the ultra-high pressure and large capacity gas circuit breaker, parallel capacitors are inserted between the poles in order to increase the breaking capacity for each primary break point.

5 to 8 show parallel capacitors connected to them in the insulation isolation bodies 23U, 23V, 23W and the insulation isolation bodies 33U, 33V, 37W of the above embodiments. An example is shown.

The embodiment shown in FIGS. 5 and 6 corresponds to the embodiment shown in FIGS. 1 and 2, and the embodiment shown in FIGS. 7 and 8 corresponds to FIGS. This corresponds to the embodiment shown in FIG.

In any of these embodiments, the inter-parallel capacitors 14U, 14V, 14W, and the like are ceramic, and the insulating isolation bodies 23U, 23V, 23W, and 33U, 33V, and 33V are ceramic types. The wall part a of (33) and (W) are formed thick, and it is buried along this wall part (a).

In this manner, even if the inter-parallel capacitors 14U, 14V, and 14W are inserted, the insulation isolation bodies 23U, 23V, and 23W that accommodate the respective blocking portions 50U, 50V, and 50W are inserted. ), And sufficient gas space in (33U), (33V), (33W) can be secured, and the breaking capacity can be further increased by the capacitors (14U), (14V), (14W).

According to the present invention, since the space within the ground tank 1 can be effectively used, the gas space of the lower end portions 50U, 50V, and 50W of each phase can be enlarged, so that a compact ultra-high voltage and a large three-phase package It is possible to provide a type gas circuit breaker.

Claims (5)

A fixed contactor, a movable contact which is foldable thereto, an insulator nozzle which ejects and guides an arc extinguishing gas to an arc generated according to the opening of the movable contactor, and the movable contactor According to the operation of opening, a blocking portion composed of a fixed piston and a buffer cylinder for increasing the arc extinguishing gas pressure is stored in each of the three-phase insulating insulating bodies, and the insulating insulating bodies are arranged in a grounded cylindrical cylinder which is grounded. A three-phase integrated gas circuit breaker is provided with a wall portion for gas-comparting each adjacent three-phase phase and a curved wall portion substantially along the curved surface of the inner wall of the ground tank. The three-phase collective gas circuit breaker according to claim 1, wherein a parallel capacitor connected in parallel between the pair of contacts is embedded in the insulating isolation body of each of the three phases. The three-phase collective gas circuit breaker according to claim 1, wherein the insulating isolation body of each of the three phases is formed in a substantially fan-shaped cross-sectional inner shape. 3. The three-phase integrated gas circuit breaker according to claim 1, wherein the insulating isolation body of each of the three phases has a cross-sectional inner shape in a roughly curved shape. 3. The three-phase collective gas circuit breaker according to claim 2, wherein the parallel capacitor is embedded in a wall portion of the insulating isolation body opposite to the ground tank.

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