Design of 4 MV coaxial-triplate water pulse forming line switch
A 4 MV water pulse forming line switch that would be used in a water pulse forming line machine was designed based on the experiments of the 1 MV water self-breaking switch.The designed breakdown voltage is 4 MV with a current about 600 kA.The water self-breaking switch is made up of electrodes,a prepulse suppression plane and joint parts.The water switch is at the joint of pulse forming line and water insulated tri-plate transmission line.The gaps of the switch are arrayed at the input section of the tri-plate transmission line linearly.The discharge current of each gap will be tested by Rogowski coil while the input and output voltages of the switch by D-dot probes.Present 2 D and 3 D models of the electrostatic field analysis are useful tools for the design.There are many differences between the results of 2 D and 3 D electrostatic field analysis.The result of the 3 D analysis is perhaps more effective because the 3 D model is more close to the configuration of the water switch.