FZRN21-12D indoor vacuum load break switch-fuse combination apparatus applies to power system of rated voltage 7.2~12kV, AC 50/60Hz.It distributes
power, control and protect electric apparatus. The apparatus replace expensive VCB to service in electricity network. It can also be used in rural and urban power supply systems to break and make under rated current and short-circuit current when the circuit breaks down. It is also applicable to control and protect transformers.It is made as per IEC62271-105.