... 252Kv and below disconnect switch and earthing switch; power automation system & equipment (monitor, reply protection, communication) ... and below disconnect switch and earthing switch; power automation system & equipment (monitor, reply protection, communication) ... bus: In=1000A,Icw=50kA;Ue=380V;Ui=660V;50Hz;IP40 2008/01/09 --- 2049 ... In=1250A~400A,Icw=50kA;Ue=380V,Ui=660V;50Hz;IP30 2007/11/09 --- 2049/ ...