Vacuum or SF6 circuit breaker at 11, 22 and 33 kV? The EU F-gas ban dates, SF6 GWP, VCB proof at 33 kV, and what to do with the SF6 switchgear you own.
How to specify an 11kV, 22kV or 33kV VCB panel: busbar sizing, vacuum against SF6, interlock schemes, and the CPRI type test most buyers never ask to see.
