CSC-326 Transformer Protection IED is selective, reliable and high speed IED for transformer protection with powerful capabilities to cover following applications: 1) For large and medium two- or three-winding transformers, autotransformer, and shunt reactor; 2) From medium to high voltage levels, up to 1000kV 3) Up to 7 three-phase sets of CTs inputs, support multi-breaker arrangement; 4) Fully proven protection functions library; 5) Customized protection function scheme, All in one or main protection unit only 6) Powerful scalable hardware capability, for present and future application:Mixable CT&VT inputs / SV(Sampling Value) input/output; Mixable Binary inputs&output relays/GOOSE inputs/outputs; 7) Robust hardware with excellent EMC performance and IP54 protection under -40℃ to 70℃ operating temperature.