Earthing Resistance(Earth Fault Detection) Auxiliary Converter (250 W, 990 Volt , 25 A, 3.9 K Ohms+/- 10%) As Per Spec. Clw/Es/3/Sk-2/0014 Pos (90.3) And Identification No. Nbt300210P0087. [ Wa Rranty Period: 30 Months After The Date Of Delivery ] ]