VZF(R)-12 series medium fixed sealed vacuum load switch fuse combination apparatus is the latest generation of vacuum switch equipment developed according to the unique design concept and combined with the market demand. It is widely used in indoor armored air insulated switchgear.It conforms to gb3804-2004 GB16926-1997 and other standards. Under normal operating conditions, as long as it is within the technical parameters of the true-space switch, it can be guaranteed to operate safely and reliably in the corresponding voltage level of the power grid.