SCR (M) -12 series ring network cabinet is an expandable SF6 insulated switchgear. It can provide 10 different configurations, suitable for most applications in 12/24/36 kV distribution networks, and they represent a complete solution for 12/24/36 kV secondary distribution networks. It has the same user interface as ABB. All of its HV live parts are housed in a gas-tight gas storage tank made of 3mm stainless steel. The entire switch assembly is SF6 insulated from any external influences, thus ensuring great service reliability and maintenance-free. SCR (M) -12 series ring mainframe can choose switch fuse combination or circuit breaker with relay to protect the transformer. RMR can provide an integrated remote control and monitoring unit.