JP3374724B2 - Vacuum switchgear - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum switchgear, and more particularly, to one or more of a circuit breaker, a disconnector, a load switch, and a grounding device. It relates to a new vacuum switchgear. 2. Description of the Related Art In response to an increasing demand in an area where power consumption is concentrated in an urban area, it is difficult to locate a substation for distribution with 6 kV supply.
Due to lack of room for distribution pipes and an increase in the operation rate of the 6 kV supply facility, it is possible to increase the distribution voltage, that is, to actively absorb the load to a 22 kV system having a larger capacity per line than 6 kV. It leads to equipment formation.
For this purpose, it is necessary to reduce the size of the 22 kV distribution equipment to about 6 kV. For example, SF described in Japanese Patent Laid-Open Publication No. 3-273804
₆ Gas insulated switchgear is conceivable. In this switchgear, a circuit breaker, two disconnectors, and a grounding switch are individually manufactured and housed in a unit room and a bus room in which a distribution box is filled with insulating gas. When a vacuum circuit breaker is used as the circuit breaker, the movable electrode is moved up and down with respect to the fixed electrode by the operation device of the vacuum circuit breaker, and the movable electrode is turned on and off, or described in JP-A-55-143727. In the vacuum circuit breaker, the movable electrode is turned left and right about the main shaft as a fulcrum, and comes into contact with and separates from the fixed electrode, thereby closing and closing. A gas insulated switchgear receives, for example, electric power from an electric power company by a disconnector and a gas circuit breaker, changes the voltage to a voltage optimal for a load by a transformer, and supplies electric power to a load, such as a motor. To maintain and inspect the substation equipment,
After the gas circuit breaker is turned off, the disconnecting switch provided separately from the gas circuit breaker is opened, and the grounding switch is grounded, so that the residual charge and the induced current on the power supply side flow to the ground, and the power supply from the power supply is restored. The application of voltage is prevented to protect the worker's safety. Also,
If the grounding switch is grounded while the bus is charged, an accident may occur. Therefore, an interlock is provided between the disconnecting switch and the grounding switch. [0004] For example, JP-A-3-27380
The SF ₆ gas insulated switchgear described in Japanese Patent Publication No. 4 is separately manufactured and accommodated with a gas circuit breaker, two disconnectors and a grounding switch in a unit room and a bus room filled with SF ₆ gas in a distribution box. are doing. When a vacuum circuit breaker is used as a circuit breaker, the movable electrode in the vacuum vessel moves up and down with respect to the fixed electrode by the operating device, and is turned on and off.
The vacuum circuit breaker described in 55-143727 publication has a movable lead wire corresponding to a movable blade and a movable electrode in a vacuum vessel pivoting left and right with a main shaft as a fulcrum, and comes into contact with and separates from a fixed electrode. It is turned on and off. However, in these gazettes, especially the former gazette, the cable head, the grounding device, and the operation device are provided on the back surface of the switchboard, and it is unavoidable to increase the size of the switchboard. This increase in the size of the switchboard it can be a have to avoid.
An object of the present invention is to provide a vacuum switchgear that can use a switchboard of the same size even when the capacity of a circuit breaker increases. [0005] According to one embodiment of the present invention.
For example, a switchgear having a cut-off section compartment and an operation section compartment , wherein a fixed electrode, a ground electrode,
A movable electrode disposed between the fixed electrode and the ground electrode;
The movable electrode is fixed via a fulcrum connected to the movable electrode.
Movable blade contacting and separating electrode and ground electrode, and said movable electrode
Load side electrically connected to and supported by a vacuum grounding vessel
The conductor is accommodated in the vacuum grounding container for three circuits, and the rated voltage is 24 kV, the rated current is 600 A, and the rated breaking capacity is 25 kA.
Shut-off section compass with three-phase switchgear
The conductor compartment and the cutoff compartment
Width , including compartments and controls
1100mm, height 1500mm, the external dimensions of depth 450mm Yes
To provide a vacuum switchgear. DETAILED DESCRIPTION OF THE INVENTION Hereinafter, more description of examples of the present invention in FIGS. 1-5. The circuit diagram of FIG. 1 shows the entirety of the collective switchgear, and FIG. 2 shows an electric circuit adapted to the structure of the circuit switch for one circuit of FIG.
Figure 3 of the showing the structure of a circuit switch of the circuit component, a FIG. Figure 5 is a relay terminal plate 27 connected by bus between circuit switches each phase. [0007] The multi-phase, for example, three of the third circuit minute switch 1,
2 and 3 were placed in a vacuum grounded container 4 which was grounded E. Since each third circuit switch 1, 2, and 3 configuration is the same, a second circuit switch 2 describes, will not be described other circuit switches. Circuit switch 2 phase switches 2X, 2Y, 2Z
Of the three phases. Each phase switch 2X, 2
Y, since 2Z are configuration is the same, the phase switch of the first phase switch 2X
Describes only, other phase switches 2Y, description thereof will be omitted 2Z. [0008] Phase switch 2X is blocking function, disconnecting function is obtained by set integrally grounding function and bus. That is, the phase <br/> switch 2X constitute a movable electrode 7 for moving between the stationary electrode 5 and the ground electrode 6 mainly. Fixed electrode 5
Is connected to the internal bus 8. The movable electrode 7 is connected to a load-side conductor 9, and the load-side conductor 9 is connected to a cable head 10 extending outside the vacuum grounding container. In addition, the movable electrode 7 is mechanically connected to a movable blade described later, and is rotated vertically or horizontally by rotation of a movable blade driven by an operation mechanism (not shown). When the movable electrode 7 moves from the fixed electrode 5 to the ground electrode 6, it stops at the four positions in FIG. The circuit switch 1 is the power supply side to case and connected to the movable electrode 7 - is electrically connected to a system power source 12 by Bull 11. [0009] variable dynamic electrode 7 in response to rotation, energized in the on position Y1 where the movable electrode 7 is in contact with the stationary electrode 5, movable electrode with a blocking position Y2 rotated below the loading position Y1 7 separates from the fixed electrode 5 and interrupts the current. Further, the movable electrode 7 is rotated downward and the movable electrode 7 is separated from the fixed electrode 5 at the disconnection position Y3. The movable electrode 7 further pivots downward, and the movable electrode 7 contacts the ground electrode 6 at the ground position Y4. It should be noted that omitting the disconnection position Y3 and moving from the interruption position Y2 to the ground contact position Y4 does not impair the effects of the present invention. In a vacuum, which is a high insulator, four positions can be continuously performed by one operation while the movable electrode 7 rotates from the fixed electrode 5 to the ground electrode 6, so that the operation is easy. Easy to use . Movable electrode 7, fixed electrode 5,
Since the ground electrodes 6 are integrated at one location, the size can be further reduced as compared with the above-described related art. Further disconnection position Y
When 3 provided in two-line power reception having different-source butt, for example, two of the system power source, any one line of the phase switch 2
X is in operation at the close position Y1, not only at the time of waiting phase switch 2Y is the disconnection position Y3 of the other line, it is safe to contact the operator on the load side conductor 9, and from standby Since the operation can be performed continuously even when driving or switching from the operation to the standby, the operation speed is high and the operation is easy. Further, by detecting the energizing current by the current transformer 13 and operating the protection relay 14 to trip the operation mechanism (not shown), it is possible to cope with a system failure. The grounded vacuum grounding container 4 is made of a stainless steel member, a part of which is formed in a spherical or curved shape so as to increase the mechanical strength of the vacuum grounding container 4 or to improve the vacuum grounding container wall. The thickness is reduced to reduce the weight. The vacuum grounding container 4 is housed in a switchboard 16. Switchboard 1
6 is provided with an operation section compartment 17 and a conductor compartment 18 on the upper and lower sides of the vacuum grounding container 4. The operation section compartment 17 is disposed so as to be recessed on the right side, that is, the depth side of the vacuum grounding container 4, and has a door 19 that can be opened and closed on the front side. Also conductor compartment 1
Reference numeral 8 is arranged on the left side of the vacuum grounding container 4, that is, on the near side. The operation section compartment 17 and the conductor compartment 18 are disposed obliquely symmetrically via the vacuum grounding container 4. The operation section compartment 17 houses an operation mechanism section for rotating the movable blade and the movable electrode 7. The conductor compartment 18 houses the load-side conductor 9 and the cable head 10. A tool or the like for maintaining and inspecting the inside of the operation section compartment can be placed on the vacuum container on the front side of the operation section compartment 17, and maintenance and inspection are easy. The conductor compartment 18 is disposed on the front side before the operation section compartment 17 so that the cable head 10 can be safely mounted. Nine bushings 21 are mounted on the front wall of the vacuum grounding container. One side of the first 3-phase in the circuit switch 1 of the power source side cable 11, the bushing 2
1 and connected to an external system power supply 12. Second
And the third third circuit switch 2,3 any one side load side conductor 9 of each of the three phases are connected to the cable head 10 through the bushing 21. Cable head 1 when connecting
This is performed by inserting the load-side conductor 9 into the connector provided at the position 0.
The load-side conductor 9 in the cable head is a flexible conductor 2
2 are connected to loads such as a transformer TR, other circuits, and a motor. The phases of the second circuit switch cable head 10 of the switch 2, a current transformer 13 provided as shown in FIG. 4,
Penetrates. In other circuits the switch 2 is provided with a current transformer 13 connected as needed such as load conditions. The ground electrodes 6 correspond to the nine cable heads 10 and are arranged above the cable heads 10, and connect the common ground conductor 24 to the common ground conductor 24. Both ends of the common ground conductor 24 are fixed to the switchboard 16 by ground screws 25. These cable head 10, ground cable 38, current transformer 1
3 can be seen from the front side to prevent forgetting to attach, and to improve the work efficiency by making the attachment and detachment work easier for the operator. [0015] Internal bus 8 In each of 3 between circuit switch Figure 1
Although There has been connecting the direct circuit switch, which is to that connection between the circuit switch directly in order to facilitate understanding of the embodiments. Actually, the relay terminal plate 27 of FIG. 1 is provided with a relay terminal plate 27 having a relay terminal 26 constituted by a part of the nine fixed electrodes 5 of FIG.
6 are connected to the internal buses 8 described above. When each internal bus 8 is arranged on the relay terminal plate 27, the relay terminal plate 2
7 sequentially from the left side to the right side of the first circuit switch.
Second, placing the internal bus 8 of the third circuit switch from switch. When arranging, the internal bus 8 of each circuit switchgear
Means 1 phase 1X, 2X, 3X on one side with 2 phase and 3 phase 2X
2Z and 3X to 3Z are arranged while being wrapped on the other side to facilitate wiring, and to take measures such as prevention of wiring mistakes and prevention of thermal deterioration by distributed arrangement of internal buses. The circuit switch 1-3 of the first, second, and third is disposed in a vacuum ground vessel, although the following configuration, since construction phase switch 2X~2Z is the same, 1 phase describes only the configuration of the frequency of the phase switches 2X, other phase switches 2Y, description of 2Z is omitted. A movable electrode 7 that rotates between a ground electrode 6 and a fixed electrode 5 corresponding to the ground electrode 6 is disposed inside the vacuum ground container 4, and a cable head 10 is arranged corresponding to the movable electrode 7. They are arranged in a cross shape as a whole. The ground electrode 6, the movable blade 30, and the load-side conductor 9 that pass through three through holes (not shown) formed in the vacuum grounding container 4 extend outside the vacuum grounding container. The ground electrode 6 has a ground-side bottom fitting 31 at one end, a ground-side bushing 32 made of a ceramic material having an open end at the other end, and a flange 33 provided on the outer periphery of the ground-side bushing 32. The ground-side sealing fitting 34 attached to 33 is welded to the vacuum grounding container 4. A grounding bellows 35, a spring 36, and a grounding conductor 37 are arranged in the grounding bushing. The ground-side conductor 37 extends to the outside through the ground-side bottom fitting 31, and the end of the ground-side conductor 37 is connected to the above-mentioned common ground conductor 24 by a screw. The grounding-side cable 38 is formed of a flexible conductor, and can be electrically connected even when the grounding-side conductor 37 moves. A ground electrode 39 is fixed to the ground conductor 37 on the opposite side. When the ground electrode 39 is pushed toward the ground-side bottom fitting, the spring 36 also contracts together with the ground-side bellows 35. At this time, the spring 36 always presses the ground electrode 39 in the direction of the movable electrode due to the contracted force. Note that the ground side conductor 3
7 and the ground electrode 39 are distinguished from each other, but they may be integrally referred to as a ground electrode. The fixed electrode 5 corresponding to the ground electrode 6 is connected to the three-phase internal bus 8. The three-phase internal buses 8 are arranged as shown in FIG. The fixed electrode 5 is supported by a fixed insulating cylinder 42 made of a ceramic material via a fixed relay fitting 41. A fixed support member 43 supporting the other end of the fixed insulating cylinder 42 is fixed to the vacuum grounding container by a brazing material. That is, the fixed relay fitting 41 and the fixed support fitting 43 are attached to both ends of the fixed insulating cylinder 42 in advance. The movable electrode 7 is disposed between the ground electrode 6 and the fixed electrode 5, and the movable electrode 7 is supported by a movable insulating cylinder 45 made of a ceramic material via a movable relay fitting 44. One end is supported by the movable support bracket 46 as described above, and the movable support bracket 46 is supported by the movable blade 30. The movable blade 30 extends outside through the movable support plate 47. The movable support plate 47 is provided for the vacuum grounding container 4.
Fixed to. The movable blade 30 is surrounded by an extendable movable bellows 48, one end of which is attached to the movable support bracket 46 and the other end of which is attached to the movable support plate 47. To be able to The movable blade 30 has a main shaft 4
It rotates in the direction of the arrow with 9 as a fulcrum, and comes into contact with and separates the ground electrode 39 and the fixed electrode 5. The above-mentioned electrodes 5 to 7 are made of an alloy containing Cu as a main component and other Cr-W-Pb, Cu-C
A high melting point metal material such as an r alloy, a Cu-Ag alloy, or a Cu-Ni alloy is used. The movable blade 30 rotates about the main shaft 49 as a fulcrum by driving an operating mechanism (not shown) connected to the tip of the movable blade 30. The operation shaft 50 connects the movable blade 30 and the operation mechanism. Note that a structure in which only the movable electrode is provided at the tip of the movable blade 30 may be used. In this case, it is necessary insulating means for interrupting the current to the part of either the movable blade and the operation mechanism unit. [0021] which connects the tip of the movable electrode 7 and load-side conductor 9 by deflection <br/> Kishiburu conductor 22. Load side conductor 9
Are connected to the cable head 10 through the load side bushing 21A made of a ceramic material. A load-side sealing member 53 is provided at the end of the load-side bushing 21A, and the load-side sealing member 53 is supported by welding a brazing material around an opening made in the vacuum grounding container 4 and the inside of the vacuum grounding container 4 The ground surface metal layer 54 is provided on the ceramic surface of the load side bushing 21A which is exposed to the outside, so that leakage current flows to the ground E via the vacuum grounding container 4, and there is a danger even if an operator comes into contact with the cable head 10. Safety measures are taken to prevent this from happening. Next, the operation of the phase switch gear will be described with reference to FIGS. The movable electrode 7 is disposed between the ground electrode 6 and the fixed electrode 5 as shown in FIG.
And the disconnection position Y3. From this position, the movable electrode 7 is rotated in the arrow direction X1 as shown in FIG. 6, and the movable electrode 7 is in contact with the ground electrode 39, that is, the so-called ground position Y4. It is pressed by a spring 36 in the electrode direction.
The movable electrode 7 is moved from the ground position Y4 in the arrow direction X as shown in FIG.
2, the movable electrode 7 is in contact with the fixed electrode 5 and is also connected to the load-side conductor 9, which is a so-called closing position Y1. At the input position Y1, the movable electrode 7 is
And is also connected to the load-side conductor 9. In this case, unlike the related art, power is supplied from the movable electrode 7 to the load-side conductor 9 via the fixed electrode 5 and the flexible conductor 22 without passing through the movable blade 30. Compared with this, the power consumption can be greatly reduced, the electric resistance is reduced, and the power loss and the generated heat can be reduced accordingly. On the other hand, power is always supplied to the load at the input position Y1, the operation time is longer than the operation time at other positions, and if the flexible conductor 22 is not used, the movable electrode 7 is directly connected to the load. Sliding on the conductor 9 is conceivable. This means that the movable electrode 7 slides directly on the load-side conductor 9,
The current continues to flow while the movable electrode 7 and the load-side conductor 9 are in contact with each other, and the generated heat may cause the movable electrode 7 and the load-side conductor 9 to be welded. As a result,
Since the welded movable electrode 7 and the load-side conductor 9 are separated from each other, the rotating force of the operating mechanism increases, and the operating mechanism cannot be increased in size, and the vacuum circuit breaker is increased in size and cost. Get high. Also, if the sliding occurs while heat is being generated, the electrodes are severely worn and the life of both electrodes is short. Further, when the movable electrode 7 slides on the load-side conductor 9, fine metal particles generated from the movable electrode 7 and the load-side conductor 9 diffuse and remain in the vacuum vessel, so that the dielectric breakdown easily occurs. In the above embodiment , the movable electrode 7 does not slide directly on the load-side conductor 9 and the flexible conductor 22 does not slide on the load-side conductor 9.
The movable electrode 7 and the load-side conductor 9 are not welded to each other, the rotating force of the operating mechanism is not increased, and the operating mechanism is downsized. Can be done . The lives of the movable electrode 7 and the load-side conductor 9 are also longer than those described above, which is economically advantageous. The flexible conductor 22 connects the load-side conductor 9 and the movable electrode 7 at the shortest distance, and as described above, the movable electrode 7 may generate metal vapor when sliding on the load-side conductor 9. And the current cutoff characteristics are greatly improved as compared with the above.
Can be reduced in size. [0026] Thus, in the present invention, the fixed electrode 5 disposed in the vacuum ground container and the ground electrode 6, the movable electrode 7 disposed between the electrodes, the movable electrode through the fulcrum to the movable electrode 7 a movable blade 30 coupled to a phase switch having a load-side conductor 9 which is electrically connected to the movable electrode 7, the three phases of the phase switch is accommodated in a vacuum ground vessel performance, rating The switchboard having a voltage of 24 kV, a rated current of 600 A, and a rated breaking capacity of 25 kA. The switchboard in which this vacuum grounding container is housed in the breaking section compartment has a width of 1100 mm and a height of 15 mm.
It can be used as a switch gear of 00 mm and depth of 450 mm. This is the same size as the field switchboard of a distribution substation with a rated voltage of 6 kV, which conventionally used three independent vacuum circuit breakers. That is, the rated voltage of the three-phase switchgear of the present invention is 2 with respect to the conventional vacuum circuit breaker with the rated voltage of 6 kV.
Even if 4 kV is increased, it can be used for the same switchboard, so there is compatibility. Furthermore, the present invention because it can be used also to remove grounding device and the disconnection position, further vacuum earthing containers, compact operating mechanism unit, the circuit switch can naturally also downsized. Further, the volume 5C of the fixed-electrode-side vacuum grounding container from the center of the movable electrode 7 located at the center between the grounding electrode 6 and the fixed electrode 5 is made larger than the volume 6C of the grounding-electrode-side vacuum grounding container. In order to make the volume 5C larger than the volume 6C, distances from the center 0 of the movable electrode 7 located at the center between the ground electrode 39 and the fixed electrode 5 to the vacuum ground containers on the fixed electrode side and the ground electrode side are L1 and L2. Then, the vacuum grounding container 4 may be configured so that L1> L2. As a result, when the movable electrode 7 comes into contact with or separates from the ground electrode 6 or the fixed electrode 5, the ground electrode 6 only flows the residual charge on the power supply side and the induced current to the ground. The ground electrode 6 is much smaller than . The volume 6C may be smaller than the volume 5C, but the fixed electrode 5 frequently switches on and off a larger current than the ground electrode 6, and more metal fine particles from both the electrodes 5 and 7 than the ground electrode 6 when turning on and off. Occurs . Volume 5C is volume 6C
By making it wider, most of the metal vapor diffuses in the volume 5C, the residual ions can be reduced, the current interruption performance can be improved , and the switchgear can of course be downsized. Next, another embodiment will be described with reference to FIGS. Attach the load-side common conductor 56 in the vacuum grounded container,
The load-side common conductor 56 is connected to the load-side conductor 9, and has a ground contact 57 and a load-side contact 58 mounted thereon. A part of the ground-side conductor 37 connected to the load-side conductor 9 and the ground electrode 39 is provided on the front side of the switchboard, so that the same effect as described above can be achieved.
With the movable electrode 7 and the load side contact 57 in contact with each other,
At the same time as the movable electrode 7 is moved upward from the load side contact 58, the ground movable electrode 59 is moved downward and the ground side contact 58 is moved.
To ground. In the former case, the state is changed from the closed state to the closed state. In this embodiment, the fixed electrode 5 connected to the buses 8 of a plurality of phases is arranged in a direction perpendicular to the movable electrode 7 and the load-side contact 58, that is, in the lateral direction. can also be used between the electrode 59 and the ground-side contact 58 to the first circuit switch connected flexible conductors 22. In addition, the fixed electrode 5 and the movable electrode 7 are connected by the flexible conductor 22 and can be used as a one-circuit switch gear. A central portion 0 is provided between the movable electrode 7 and the ground movable electrode 59 in the vacuum grounding vessel, and the central portion 0 and the movable electrode 7
The distance between the side, the ground movable electrode 59 side and the inner surface of the vacuum grounding container is L1 and L2. The volumes in the right and left vacuum grounded containers via the center portion 0 are denoted by C5 and C6. The relationship between these L1 and L2 and C5 and C6 is L1>
L2 and C5> C6, and the same effect as described above can be achieved. The circuit component switch of the present invention, the circuit breaker in which the movable electrode in addition to the above-described opening and closing the fixed electrode, switches such as vacuum circuit breaker, disconnecting switch fixed electrode and the movable electrode approaching and moving away from, the earth switch It can also be used as a stand-alone product such as a switch . [0032] As described above, according to the present invention, the vacuum of the present invention housing the three phases of the phase switch having a load-side conductors connected to the movable electrodes electrically in vacuum earthing vessel The switch has a rated voltage of 24 kV, a rated current of 600 A, and a rated breaking capacity of 25.
A switchboard having a kA and containing the vacuum grounding container in the shutoff compartment has a width of 1100 mm and a height of 1500 m.
It can be used as a switch gear with m and depth of 450mm.
This is the same size as the field switchboard of distribution substation rated voltage 6kV that used in 3-phase independent conventional vacuum interrupter. That is, even if the rated voltage of the three-phase switchgear of the present invention is increased by 24 kV with respect to the conventional vacuum circuit breaker with the rated voltage of 6 kV, the same circuit board can be used .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a hybrid switchgear according to an embodiment of the present invention. Figure 2 is a side sectional view showing a first circuit component switch configuration used in FIG. FIG. 3 is a front view of FIG. 2 as viewed from the left side. FIG. 4 is a plan view of the bus connection terminal block shown in FIGS. 1 and 3; Figure 5 is a side sectional view showing the configuration of a circuit switch shown in FIGS. Figure 6 is a side cross-sectional view of a no-load state of the circuit switch of FIG. 3. Figure 7 is a side sectional view showing the grounding state of the circuit switch of FIG. Figure 8 is a side cross-sectional view illustrating a closed state of the circuit switch of FIG. Sectional side view showing the structure of a circuit switch which is another embodiment of the present invention; FIG. Figure 10 is a side sectional view showing the grounding state of the circuit switch of FIG. [Reference Numerals] 1-3 ... 3 circuit component switches, 2X to 2Z ... phase switch,
4 ... vacuum earth container, 5 ... fixed electrode, 6 ... ground electrode, 7 ...
Movable electrode, 8: internal bus, 9: load side conductor, 11: power supply side cable, 16A: cutoff compartment, 17 ...
Operation section compartment, 18: conductor compartment, 22: flexible conductor, 30: movable blade.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Ayumu Morita 7-2-1, Omika-cho, Hitachi City, Ibaraki Pref. A) JP-A-9-153320 (JP, A) JP-A-49-121972 (JP, A) JP-B-49-41903 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) H02B 13/02 H01H 33/66

Claims (1)

(57) Claims 1. A switchgear having a cut-off section compartment and an operation section compartment, wherein the switchgear includes a fixed electrode ,
A ground electrode, the fixed electrode and the movable electrode disposed between the ground electrode, before the movable electrode through a fulcrum coupled to said movable electrode
Serial movable blade and the friendly toward or away the fixed electrode and the ground electrode <br/> moving electrode and is electrically connected, and third storage circuit component on the load side conductor that is supported by the vacuum earthing vessel the vacuum earthing container hand,
Rated voltage 24kV, rated current 600A, rated breaking capacity 2
The three-phase switchgear with the performance of 5kA cuts off
Compartment, conductor compartment, shut off
Including compartment and operation compartment
Te, outside of width 1100mm, height 1500mm, depth 450mm
A vacuum switchgear having a shape and dimensions .