Mobile impulse voltage generators are designed for onsite HV impulse voltage test on GIS, transformers and other electrical equipment, adopt H structure, consists two dry type impulse capacitors for each stage, cumulative charging voltage can be up to 3000kV.
They are mounted on container, which is customized from standard container, can be lifted up automatically for testing by hydraulic cylinder, then put down to container for transportation after test, convenient for onsite high voltage impulse test of GIS, transformers, etc.
Generally the test system can be set up on-site within an hour. There is no need for additional “assembly.”
The circuit of impulse generator is the Marx multiplier circuit. Impulse capacitors arranged in the stages of the generator are charged in parallel with DC voltage up to 100kV against earth potential and, in order to generate impulses, connected in series by spark gaps. For adjustment of front time and time to half value of the test impulse, the generator stages comprise front wave resistors and tail wave resistors. A short discharge loop guarantees low internal inductances and smooth voltage shape.