SCR(M)-12 series Ring Main Unit is an extensible, SF6 insulated switchgear. It can be supplied in 10 different configurations suitable for most witching applications in 12/24/36 kV distribution networks, they represent a complete solution for 12/24/36 kV secondary distribution networks. It has same identical user interfaces with ABB.All its HV live parts are contained in an air-tight gas tank, which is made from stainless steel of 3mm. The whole switching assembly is SF6 insulated, and free from any external influence, ensuring it great reliability of service and maintenance free.SCR(M)-12 series Ring Main unit offers a choice of either switch-fuse combination or circuit-breaker with relay for protection of the transformer. RMR can be supplied with an integrated remote control and monitoring unit.

Service environment

1. Air temperature:Maximum temperature: +40℃; Minimum temperature:-20℃
2. Humidity:Monthly average humidity 95%; Daily average humidity 90% .
3. Altitude above sea level:Maximum installation altitude: 2500m
4. Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
5. No frequent violent shake

Available modules:

C - Cable switch

De - Direct cable connection with earthing

D - Direct cable connection

1. - Switch-fuse-disconnector

V- Vacuum circuit-breaker

Be- Busbar earthing

Sl- Busbar sectionalizer, load break switch

Sv- Busbar sectionalizer, vacuum circuit-breaker

CBMM- Circuit-breaker module- Metering module- Metering tariff module