What is pentagraph in electric traction? All Questions › Category: Electric Vehicle › What is pentagraph in electric traction? 0 Vote Up Vote Down Chetan Shidling asked 5 years ago I need short information. 1 Answers 0 Vote Up Vote Down Chetan Shidling answered 5 years ago The purpose of pentagraph is to collect the current from overhead lines and supply it to engine or motor in electric traction.