Gas-insulated switchgear tank

Abstract

In a gas-insulated switchgear tank in which an electric insulating characteristic is improved by a gas, and which has a vacuum circuit-breaker, a disconnecting switch, and a container in which container the vacuum circuit-breaker and the disconnecting switch are arranged and an inside of which container is adapted to be hermetically sealed and filled with the gas in such a manner that the vacuum circuit-breaker and the disconnecting switch are at least partially surrounded by the gas, the gas includes N 2 and O 2 .

1 . A gas-insulated switchgear tank to be electrically connected to at least one of a number of bus bars, comprising: 
 a vacuum circuit-breaker including a movable contact, a plurality of disconnecting switches each of which includes a movable contact, and a container in which the vacuum circuit-breaker and the disconnecting switch are arranged and a mixture of nitrogen and a gas of earth-warming coefficient not more than 1 is contained, and a gaseous pressure of the mixture is kept at 0.2-0.8 MPa•abs,    wherein the movable contact of the vacuum circuit-breaker is movable along a linear axis, and the disconnecting switches are juxtaposed with each other in a direction parallel to the linear axis.    
   
   
       2 . A gas-insulated switchgear tank to be electrically connected to at least one of a number of bus bars, comprising: 
 a vacuum circuit-breaker including a movable contact, at least one disconnecting switch including a movable contact, and a container in which the vacuum circuit-breaker and the disconnecting switch are arranged and a mixture of nitrogen and a gas of earth warming coefficient not more than 1 is contained, and a gaseous pressure of the mixture is kept at 0.2-0.8 MPa•abs,    wherein the movable contact of the vacuum circuit-breaker and the movable contact of the disconnecting switch are movable along respective linear axes.    
   
   
       3 . A gas-insulated switchgear tank according to  claim 1 , wherein the movable contact of the vacuum circuit-breaker and the movable contacts of the disconnecting switches are movable along respective linear axes, and the linear axes are vertical.  
   
   
       4 . A gas-insulated switchgear tank according to  claim 2 , wherein the linear axes are vertical.  
   
   
       5 . A gas-insulated switchgear tank according to  claim 2 , wherein the linear axes are distant from each other in a horizontal direction.  
   
   
       6 . A gas-insulated switchgear tank according to  claim 5 , wherein the linear axis along which the movable contact of the disconnecting switch is movable is arranged in the horizontal direction between the at least one of the bus bars and the linear axis along which the movable contact of the vacuum circuit-breaker is movable.  
   
   
       7 . A gas-insulated switchgear tank according to  claim 3 , wherein the linear axis of at least one of the disconnecting switches and the linear axis of the vacuum circuit-breaker are spaced from each other in a horizontal direction.  
   
   
       8 . A gas-insulated switchgear tank according to  claim 7 , wherein the linear axis along which the movable contact of the at least one of the disconnecting switches is movable is arranged in the horizontal direction between the at least one of the bus bars and the linear axis along which the movable contact of the vacuum circuit-breaker is movable.  
   
   
       9 . A gas-insulated switchgear tank according to  claim 1 , wherein the container includes a first compartment in which at least a part of the vacuum circuit-breaker is contained and second compartments in each of which at least a part of corresponding one of the disconnecting switches is contained, a gaseous pressure in the first compartment is lower than a gaseous pressure in the second compartments, and the first compartment and at least one of the second compartments are juxtaposed with each other in a horizontal direction.  
   
   
       10 . A gas-insulated switchgear tank according to  claim 2 , wherein the container includes a first compartment in which at least a part of the vacuum circuit-breaker is contained and at least one second compartment in which at least a part of the disconnecting switch is contained, a gaseous pressure in the first compartment is lower than a gaseous pressure in the at least one second compartment, and the first and the at least one second compartment are juxtaposed with each other in a horizontal direction.  
   
   
       11 . A gas-insulated switchgear tank according to  claim 9 , wherein the horizontal direction is perpendicular to a longitudinal direction of the at least one of the bus bars.  
   
   
       12 . A gas-insulated switchgear tank according to  claim 9 , wherein as viewed in a direction parallel to a longitudinal direction of the at least one of the bus bars, the horizontal direction traverses a direction along which longitudinal axes of the bus bars are arranged.  
   
   
       13 . A gas-insulated switchgear tank according to  claim 9 , wherein the at least one second compartment is arranged in the horizontal direction between the at least one of the bus bars and the first compartment.  
   
   
       14 . A gas-insulated switchgear tank according to  claim 12 , wherein the direction along which longitudinal axes of the bus bars are arranged is vertical.  
   
   
       15 . A gas-insulated switchgear tank according to  claim 9 , wherein the movable contact of the vacuum circuit-breaker is movable along a linear axis, and the second compartments are juxtaposed with each other in a direction parallel to the linear axis.  
   
   
       16 . A gas-insulated switchgear tank according to  claim 10 , wherein the horizontal direction is perpendicular to a longitudinal direction of the at least one of the bus bars.  
   
   
       17 . A gas-insulated switchgear tank according to  claim 10 , wherein as viewed in a direction parallel to a longitudinal direction of the at least one of the bus bars, the horizontal direction traverses a direction along which longitudinal axes of the bus bar are arranged.  
   
   
       18 . A gas-insulated switchgear tank according to  claim 10 , wherein the second compartment is arranged in the horizontal direction between the at least one of the bus bars and the first compartment.  
   
   
       19 . A gas-insulated switchgear tank according to  claim 16 , wherein the direction along which longitudinal axes of the bus bars are arranged is vertical.  
   
   
       20 . A gas-insulated switchgear tank according to  claim 10 , wherein the gas-insulated switchgear tank comprises a plurality of the disconnecting switches and a plurality of the second compartments for containing at least the parts of the disconnecting switches respectively, the movable contact of the vacuum circuit-breaker is movable along a linear axis, and the second compartments are juxtaposed with each other in a direction parallel to the linear axis.