TW492029B - Vacuum insulated switching device - Google Patents

Abstract

The present invention provides a kind of vacuum insulated switching apparatus, in which the vacuum container accommodates a master circuit switch and a grounding switch. A breaker, which electrically connects/breaks the master circuit switch with the arbitrary one of the mother line conductor and the load side conductor, is accommodated inside the other insulation medium container, which is separated from the vacuum container. The insulation medium container contains liquid or gas for insulation. In addition, a window capable of affirming contact action of the breaker by naked eyes from outside is installed at the insulation medium container.

Description

492029 V. Description of the invention α) [Technical Field] The present invention relates to a vacuum insulated switchgear for receiving and distributing power. [Background Art] Fig. 9 is a block diagram showing a conventional air-insulated switchgear shown in Japanese Patent Publication No. 7-2 8 4 8 8. Fig. 10 is a circuit diagram showing the air-insulated switchgear of Fig. 9. In the figure, the wall portion of the container 1 penetrates through the busbar-side insulation sleeve 2a and the transmission cable line-side insulation sleeves 2b and 2c, respectively. The transmission cable line side insulation sleeves 2 b and 2 c each support the load side conductor 2. The container 1 is sealed with an insulating gas, and the first to third switches 3, 4, 5 and the vacuum arc extinguishing chamber 9 are housed. As shown in Fig. 9, each of the three-phase busbar-side branched conductors 6 is supported and arranged in the container 1 by the insulating support obstacles 1 1. Further, as shown in FIG. 10, the three-phase bus-side branched conductors 6 are respectively connected to the external three-phase bus (not shown) via the bus-side insulating sleeve 2a. The busbar-side branched conductor 6 is connected to the intermediate conductor 60 through an opening and closing device in the vacuum arc extinguishing chamber 9 and the first shutter 3, and branches in two directions through the intermediate conductor 60. The intermediate conductor 60 is fixedly supported on the insulation support obstacle 60a, and is connected to the load-side conductor 2 of the transmission cable side insulation sleeves 2b and 2c via the second and third switches 4, 5 respectively. The load-side conductor 2 is connected to an external transmission cable (not shown). The first to third shutters 3, 4, and 5 each have a metal link 8, an insulating link 7, and a swing electrode. The driving force of the driving source (not shown) of the shaking electrode is transmitted through the metal link 8 and the insulated link 7

C: \ Program Files \ Patent \ 310607.ptd Page 5 492029 V. Description of the invention (2), make it swing around the pivot. The first shutter 3 is structured according to the rocking position of the rocking electrode, and the structure has the opening and closing device for making the vacuum arc extinguishing chamber 9 a kind of pole and a fixed lightning technician protruding at the corresponding position of the Yin conductor 60. The position of the blue road for the single-phase connection of the output ECG, the connection position of the shaking electrode and the grounding conductor 1, and the position of the circuit breaker that is separated from the fixed electrode and the grounding conductor i 0a in the middle of these two positions. In addition, the second and third shutters 4, 5 are shaken by the respective swinging electrodes, and the fixed-side electrodes and grounding conductors 1 0b and 1 0c are provided on the load-side conductor 2 and projected from the intermediate conductor 6 0 respectively. Between them, a structure having the same three positions as the first shutter 3 is formed. As described above, in the conventional air-insulated switchgear, the main circuit switch for connecting / disconnecting the bus-side branched conductor 6 and the load-side conductor 2 and the ground switch for grounding the load-side conductor 2 are arranged together with the grounding conductor. Inside the container 1, the bus-side branched conductor 6 is connected to the bus outside the container 1 through the bus-side insulating sleeve 2a; the load-side conductor 2 is connected to the outside of the container 1 via the transmission cable-side insulation sleeves 2b, 2c. Transmission cable connection, which can provide a miniaturized air-insulated switchgear. However, as in the above-mentioned conventional air-insulated switchgear, since each of the three phases of the first to third switches 3, 4, and 5, the grounding interval, and the open position, the poles must be enclosed and sealed in the container i. The insulating gas (here, sulfur fluoride gas) ensures the insulation distance, and therefore the first to third switches 3, 4, and 5 become larger. In addition, each of the shutters 3, 4, and 5 must also maintain a sufficient distance, so the benefits of the space inside the container 面 I: C: \ Program Files \ Patent \ 3106〇7md ^ —j'Vi y 5. Description of the invention ( 3) The utilization rate will decrease. In addition, although the inside of the container is only tied to the machine: Use a simple one that can withstand heat build-up to parts at this time. Each single container 1 in the real road is small and cannot be seen from the outside. The invention of the invention is to separate the circuit breaker to improve its safety. The bus-side conductor of the invention holds a vacuum and the load-side conductor is placed in the insulation medium of the vacuum container connected / disconnected. To make the side of the bus bar low, the capacity in this container can also be reduced, and the small arc-extinguishing phase is caused by the open circuit, so the location of the point] is to resolve the truth and clarification: connect the containers; between Within the ground, the state of the grounded open-media media conductor and the steamed, 1 M-closing case is 800-shaped. t 9 series In order to restrict the access of the device, the miniaturization will also be restricted. Special machines 3, 4, and 5 are housed in a vacuum 'When the vacuum container is evacuated, the vacuum valleyr is heated down', so the parts above C> must be used, so it cannot be installed in the three-phase electrical guarantee shown in Figure 10. These arrangement positions have also caused problems of increasing product manufacturing costs. The point position is located in the container 1. Therefore, from the opening and closing display of the connecting rod, etc., the vacuum air insulation switch of the empty container with external reliability due to the problems described above is installed on the load side machine. This is true electrical connection / the load side conductor is closed Device; set the container; and the innovator of the load-side conductor, and to facilitate the insulation of the open device, the negative empty container is disconnected and grounded to a vacuum set to any of its' the purpose is to use other insulation devices. Provided: connect the load-side conductor; internal 'make the bus main circuit opening and closing conductor outside the container, & insulation media and the main circuit to provide a medium, inside the bus to maintain the side conductor; set electrical and container Shutter

492029 V. Description of the invention (4) Electricity between the drawings [Simplified drawing Figure 1 Set the internal structure Figure 2 Figure 3 Figure. Figure 4 Internal structure Figure 5 Figure 6 Figure. Figure 7 Closure action Figure 8 shows the internal structure Figure 9 Figure 1 [The following reference embodiment 1 of the present invention 1 Figure 1 shows the side structure connection of the internal structure / Single description is transparent and the front is the first 1 is the first permeable surface, the fourth is the fourth, and the fourth is the fourth state. The front that becomes transparent is the best picture in the past. The surface is transparent, and the third is the open circuit breaker. View the embodiment of the present invention. The vacuum insulation switch of the figure is a side view of the vacuum insulation switch device of the vacuum insulation switch 1. The circuit of one phase of the device is shown in the embodiment of the present invention. The vacuum insulation switch of the figure is a side view of the vacuum insulation switch device of the vacuum insulation switch 2. An explanatory diagram of the drive mechanism, main circuit breaker and grounding circuit of one phase of the closing device. According to the drawing of the vacuum insulation switch of the third embodiment of the present invention. Structure diagram of an air-insulated switchgear. The circuit diagram of the air-insulated switchgear in Figure 9. Application Mode] The best implementation mode of the present invention will be described in detail. According to the embodiment of the present invention, the second diagram is the first diagram of the vacuum insulation switchgear of the 1st figure of the vacuum insulation switchgear of the 1st figure

C: \ Program Files \ Patent \ 310607.ptd Page 8 492029 V. Description of the invention (5) Phase circuit diagram. In the figure, each of the three-phase vacuum containers 20 is maintained at a high vacuum state. Each of the phases in these vacuum containers 20 contains a main circuit switch 2 1 of 3 phases, a ground switch 23 of 3 phases, and a plurality of bus-side conductors 24. The bus-side conductors 24 are electrically connected to the bus (not shown). The vacuum vessel 20 is externally provided with a drive mechanism 2 2 of the main circuit switch 21; and a drive mechanism 25 of the grounded switch 23. The insulating medium container 30 containing the insulating medium (liquid or gas) contains a circuit breaker 31 and a load-side conductor 37. In addition, the insulating medium container 30 is provided with a cable insulating sleeve 38 and a cable withstand voltage terminal 33, which can be connected to the external power transmission cable 34, which is a load-side device. The load-side conductor 37 is connected to the inside of the insulated medium container 30 and connected to the cable insulation sleeve 38. And through the circuit breaker 31, it is divided into one side connected to the main circuit switch 21 in the vacuum container 20, and the other side connected to the ground switch 23 in the vacuum container 20. In addition, the insulated media container 30 is provided with a window 32 for externally confirming the contact of the circuit breaker 31 with the naked eye. In addition, not only the circuit breaker 3 1, but also sensors such as a converter 35 and a transformer 36 and a cable withstand voltage terminal 33 are arranged in the insulated medium container 30. Among them, the cable withstand voltage terminal 3 3 is a terminal for applying a voltage to the power transmission cable 34 when inspecting the power transmission cable 34. The vacuum insulated switchgear as described above, since one of the contact points of each of the main circuit breakers 21 is contacted / disengaged by the driving mechanism 22, the bus bar

C: \ ProgramFiles \ Patent \ 310607.ptd Page 9 492029 V. Description of the invention (6) The current between the side conductor 2 4 and the load side conductor 3 7 will therefore be turned on or off. The pair of contacts are contacted / disengaged by the drive mechanism 25, and the load-side conductor 37 is grounded or ungrounded accordingly. 'The main circuit breaker 21 and the grounding shutter 23 are opened and closed in the vertical direction by using the driving mechanism 2 2 and the driving mechanism 25 respectively in the units of phase A, phase b, and phase c in FIG. 2. Therefore, the influence of the arc between the phases will be reduced. In addition, as long as the insulation distance required for the vacuum state is ensured, the configuration efficiency can be improved, and the purpose of miniaturizing the container and structure can be achieved. Door_ Circuit breaker 3 1 in insulated media container 3 is used to disconnect electrical equipment from electrical appliances when the connection is changed or the electrical equipment is inspected when no load is present. When the main circuit breaker 21 is open, the contact of the circuit breaker 3 i is actuated by a driving mechanism (not shown). Since the circuit breaker 31 does not open or close during current energization, it only needs to use a high-voltage withstand voltage. Therefore, by using, for example, oil, pure water, insulating gel-like liquid, nitrogen, dry air, and these insulating mixed gases, a sufficient insulation distance is maintained. It can be confirmed through hard work that it can be known that the insulated media container 30 will not be subjected to direct manufacturing operations; t = stress <80 0 tj &quot; upper>. And when using fluorinated two-pi edge gas as the insulating medium, the container must be turned into two, so it must be used in a container that can withstand the pressure at this time. ^ ^ ^ Use of pure water or dry air, In this case, it is necessary to simplify the structure of milk due to the strong rigidity. 1 rolling mill trough, make container C: \ ProgramFiles \ Patent \ 310607.ptd page 10 492029

The main electric power is stored in each phase which has excellent and preventive effects. (7) As mentioned above, the vacuum insulated switchgear of the implementation mode 1, the circuit breaker 2 1, the grounding switch 2 3 and the bus-side conductor 2 4 each phase. The inside of the integrated vacuum container 20 is arranged in a vacuum with insulation characteristics, so the insulation distance between each other can be reduced, and the mutual influence of interphase arcs can be reduced. In addition, the structure can be simplified by the insulated media container 30. The circuit breaker 3 1, the converter 3 5 and the transformer 36, and other sensors and the double green terminals 33 can be easily installed, and It is also possible to set a window 3 2 that is available for confirming the contact action of the circuit breaker 31. Therefore, a vacuum insulated switchgear with high eye integrity and high reliability can be manufactured. Xi'an Implementation type 2 Next 'Figure 4 is a front view which can see through the internal structure of the vacuum insulation switchgear of embodiment 2 of the present invention, and Figure 5 is the vacuum insulation of Figure 4

A side view of the switchgear, FIG. 6 is a circuit diagram of one phase of the vacuum insulated switch nest f of FIG. 4. In this embodiment, the circuit breaker 31 is not disposed between the load-side conductor 3 and the main circuit breaker 21, but is disposed between the main circuit breaker 2 and the bus-side conductor 24. Further, the circuit breaker 31 and the bus bar reverse conductor $ 4 are housed together in an insulating medium &amp; device 40 equipped with an insulating medium (liquid or gas). The insulated media container 40 is provided with a window 32. 'Each of the vacuum containers 20 is provided with a driving mechanism 26 which operates in three stages. The other structures are the same as those of the first embodiment. This vacuum-insulated switchgear contains the main circuit breaker 2 1 and the grounding switch in a vacuum having excellent insulation characteristics in the same manner as in the first embodiment.

C: \ ProgramFiles \ Patent \ 310607.ptd Page 11 492 ° 29 &gt; Description of the invention (8) The shutter 2 3 can reduce the insulation distance of each other ’and prevent the mutual influence of the interphase arc. In addition, since the structure of the insulating medium container 40 is simplified, the circuit breaker 31 can be freely arranged, and the structure of the bus-side conductor 24 can be relatively simplified. In addition, since the drive mechanism 26 is operated in three stages, as shown in FIG. 7, the main circuit switch 21 and the grounding switch 23 are in a state where the contacts of the main circuit switch 21 are closed, and the main circuit is opened and closed. The contacts of the switch 21 and the grounding switch 2 3 are all open, or the contact of the grounding switch 23 is closed.

Therefore, a single drive source can be used to perform the contact / separation operation of the main circuit breaker 21 contact and the grounded switch 23 contact / disconnection operation. In other words, since the insulating medium container 40 can be simply constructed, the structure can be designed in accordance with the configuration of the circuit breaker 31, the position of the conductor, or the device configuration, and the degree of freedom is extremely high. Embodiment 3 Next, FIG. 8 is a front view of the vacuum insulated switchgear of Embodiment 3 of the present invention. In this embodiment, a circuit breaker 31 is housed in an insulating medium container 50 which is provided with an insulating medium (liquid or gas). In addition, the contacts of the circuit breaker 31 can be opened and closed by the driving mechanism 5 丄 in the same manner as other contacts. At this time, the bus-side conductors 52 are connected to each other in the insulated medium container 50 in a meandering manner. The other configuration is the same as that of Implementation Mode 2.

492029 V. Description of the invention (9) Limitations on the use of space or mechanism by unifying the axis direction of the device 3 Prevent the unreasonable arrangement of conductors or no [Explanation of component symbols] 1 Container 2a Bus-side insulation sleeve 3 Section 1 Switch 5 Third switch 7 Insulated connecting rod 9 Vacuum arc extinguishing chamber 20 Vacuum container 22 Drive for main circuit breaker 2.3 Grounded shutter 25 Drive mechanism for grounded shutter 26 Drive mechanism 31 Circuit breaker 33 Cable withstand voltage Terminal 35 Inverter 37 Load-side conductor 40 Insulating media container 51 Drive mechanism 60 Intermediate conductor brings device stability. Moreover, the relative machine configuration is very simple, and at the same time, the effective linkage device can be increased. 2 Load-side conductors 2b, 2c Transmission cable line insulation sleeves 4 Second switch 6 Bus-side branch conductors 8 Metal links 11 Insulation support barriers 21 Main circuit shutter mechanism 24 Bus-side conductors 30 Insulating media containers 32 Windows 34 Transmission cables Line 36 Transformer 38 Cable insulation sleeve 50 Insulated media container 52 Bus-side conductor 60a Insulation support

C: \ ProgramFilesVPatent \ 310607.ptd page 13

Claims (1)

492029 6. Scope of patent application1. A vacuum insulated switchgear, which has a bus-side conductor connected to the bus; a vacuum-capacity J-side conductor connected to the load side of the load-side machine to maintain a vacuum; installed in this vacuum container, ; 、 Electrical connection / disconnection between the load-side conductors = 逑 bus-side conductors and the aforementioned negative set in the aforementioned vacuum container, = main circuit breaker; load-side conductors with electrical connection / disconnection between the conductors and The ground is provided on the m 'shutter outside the vacuum container; the media container; and an insulation with an insulation medium is placed in the insulation medium container. Conductor and remote connection / _ η Any circuit breaker that is electrically connected / disconnected to the main circuit breaker described above. 2. t: The vacuum insulated switchgear of the first scope of the patent, in which the front circuit breaker and the grounding switch are composed of 3 phases, respectively, and i do not confine in the aforementioned vacuum containers, and the circuit breaker is composed of 3 meshes' and each phase is contained in each insulated media container. 3. The vacuum insulated switchgear according to item i of the application, wherein the circuit breaker is disposed between the load-side conductor and the main circuit breaker, and the bus-side conductor is housed in the vacuum chamber. 4. If the vacuum insulated switchgear of item i of the patent application is applied, the front-line second series is arranged in the main circuit breaker and the bus-side conductor &gt; the other bus-side conductor is housed in the insulated medium container. 5 · For the vacuum insulated switchgear of the scope of patent application No.1, among which: C: \ Program Files \ Patent \ 3101607.ptd Page 14 492029 VI. The scope of patent application is equipped with separate storage in the aforementioned insulated media container Terminals for converter steam, transformer and winding withstand voltage. 6. The vacuum insulated switchgear according to item 1 of the scope of the patent application, wherein the aforementioned insulated media container is provided with a window through which the contact action of the circuit breaker can be confirmed by the naked eye from the outside. C: \ Program Files \ Patent \ 310607.ptd page 15