Air insulation opening or closing device
A gas-insulated switch and switch technology, which is applied to switchgear, switchgear setting, electrical switches, etc., can solve the problems of increased gas usage, increased installation space, and enlarged body container 2, etc., and achieves electric field relaxation. Ease of use, reduced usage, easy connection effects
Inactive Publication Date: 2007-09-12
MITSUBISHI ELECTRIC CORP
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Problems solved by technology
[0006] In the above-mentioned conventional gas insulated switchgear, since the circuit breaker 6, the circuit breaker 7, the grounding switch 13, and the cable head connection part 9 contained in the main body container 2 are connected to each other, the connecting conductors 5a, 7a and 8. In order to ensure the space insulation distance between equipment and components, it is necessary to increase the body container 2
In addition, even if only looking at the circuit breaker 6, since the driving rod 24 is exposed in the main body container 2, it is necessary to ensure a space insulation distance for this part, which becomes the reason for enlarging the main body container 2.
In addition, when the safety rate of the insulation resistance as shown in FIG. 9 is large, the main body container 2 is further enlarged.
As a result, since the main body container 2 needs to be enlarged, the gas insulated switchgear itself is enlarged, so there is an increase in transportation costs, an increase in the construction cost of the electrical room due to an increase in the installation space, and an increase in the size of the main body container 2. i.e. SF 6 Problems such as an increase in the amount of gas used
Method used
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Embodiment Construction
[0019] 1 to 6 show a gas insulated switchgear according to Embodiment 1 of the present invention. Fig. 1 is a cross-sectional view showing a gas insulated switchgear according to Embodiment 1 of the present invention. Fig. 2 is a diagram showing a state in which the circuit breaker in Fig. 1 is pulled out. Fig. 3 is a view showing a state in which the shutter unit in Fig. 2 is pulled out. Fig. 4 is a diagram showing the circuit breaker of Fig. 1 , in which Fig. 4(a) is a side view and Fig. 4(b) is a rear view. FIG. 5 is a view showing the shutter unit of FIG. 1 , FIG. 5( a ) is a front view, and FIG. 5( b ) is a side view. Fig. 6 is a view seen from the VI-VI direction of Fig. 1 .
[0020] In these figures, 50 is SF enclosed inside as an insulating medium 6 The body container of the gas, 51a is the first busbar chamber placed on the upper part of the body container 50, 51b is the second busbar chamber arranged adjacent to the first busbar chamber 51a, and 52a, 52b are a pl...
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A gas insulated switch gear has a housing provided with a feed through conductor in an upper part thereof, a ground switch and a vacuum circuit breaker disposed and connected vertically below the feed through conductor, a switching unit and cable heads disposed and connected to a lower end of the vacuum circuit breaker vertically up to the upper rear part of the housing, to form a U shaped main circuit including these apparatuses from the feed through conductor to the cable heads. The apparatuses constituting the main circuit are electrically connected with each other by directly being fixed on field reducing conductive cases of the moveable contact of each apparatus.
Description
technical field [0001] The present invention relates to a gas insulated switchgear for on-off control of electric power, in particular to a gas insulated switchgear for a relatively high voltage with a rated voltage above 60kV. Background technique [0002] 7 to 9 show conventional gas insulated switching devices. 7 is a side sectional view of a gas-insulated switchgear with a rated voltage of 72 kV or 84 kV published in the Journal of the Institute of Electrical Equipment (October 2013 issue). In the figure, 1 is a gas-insulated switchgear, and 2 is SF enclosed as an insulating medium. 6 The main body container of the gas, 3 is the bus bar room, which accommodates the 3-phase bus bar 4 arranged between multiple devices arranged in juxtaposition. 5 is a circuit breaker for disconnecting the branch main circuit branched from the bus bar 4, and 6 is the upper The vacuum circuit breaker whose terminals are connected to the circuit breaker 5 through the connection conductor 5a...
Claims
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IPC IPC(8): H02B13/035H01H33/66
CPCH01H2033/6667H01H2033/6665H01H33/666H02B13/0354H01L2224/48091H01L2924/00014H02B13/035
Inventor 西崎雅芳金原直广小山和昭
Owner MITSUBISHI ELECTRIC CORP