What is meaning of 110 KV/ 11 KV substation? All Questions › Category: Switchgear And Protection › What is meaning of 110 KV/ 11 KV substation? -1 Vote Up Vote Down Chetan Shidling Staff asked 5 years ago I need short information. 1 Answers -2 Vote Up Vote Down Ashok answered 5 years ago 110 kv means this is the incoming supply of subststion. 11kV means it is outgoing supply of substation i. e. Step down by using transformer.