1. 12kV SF6 Insulated Ring Main Unit 2. KEMA type test & IEC 3. ISO90001 &ISO14000 4. XIHARI' ... 12kV SF6 Insulated Ring Main UnitGLX24 series SF6 Ring Main Unit is an estensible, SF6 insulated siwtchgear, with rated voltage of ... shielded, exhibiting high reliability and safety.GLX24 series Ring Main Unit is suitable for all MV network up to 24KV, all ...