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In order to replace the SF6 gas with strong greenhouse effect in the high-voltage switchgear, CO2 has become one of the hotspots. In this paper, LW35-40.5(G)/T2500(3150)-31.5 gas-blast circuit-breaker is used as the research object to study the dielectric recovery characteristics of CO2 gas-blast arc chamber under no-load breaking, so that the theoretical basis for the development of CO2 circuit-breaker...
Manufacturers have paid more and more attention to solid insulation Ring Main Unit (RMU). The usage of RMU is needed more and also the requirement to its performance is higher. In this paper, a 12kV solid insulation RMU has been taken as a research object. Realistic 3-D simulation models were built in Solidworks software. A simplified model of a solid insulation RMS was setup with or without shielding...
In the tendency of high capacity and structure miniaturization, 40.5kV solid insulation vacuum circuit breakers have been widely used in electrical distribution networks. In order to investigate the effect of the grounded shield on insulating performance, the electric field distribution of a solid insulation vacuum circuit breaker was calculated by finite element analysis software. Taking a 40.5kV...
Because of great harmfulness for greenhouse effect, SF6 gas has to be limited. It is necessary to develop high voltage vacuum circuit breaker to replace SF6 circuit breaker. Insulating structure and arc characteristics of vacuum interrupter are the key. For 72.5 kV vacuum interrupter, impulse voltage test is carried to find out factor of effecting on its insulating performance and insulating structure...
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