We　propose　a　novel　contactless　measurement　technique　for　detecting　the　phasing　of　double　overhead　transmission　lines　which　are　used　to　supply　power　to　a　transformer　in　the　substation.　Different　from　traditional　contactless　methods　whose　sensors　should　be　quite　close　to　measured　overhead　lines,　the　proposed　method　uses　a　electric　fled　(EF)　sensor　located　on　the　ground　to　measure　the　ground-level　electric　field　distribution.　Then,　the　remote　contactless　phasing　test　method　can　be　realized　based　on　the　distribution　waveform.　The　proposed　method　has　been　validated　by　experimental　tests　on　a　reduced　scale　model　of　double　overhead　transmission　lines.　©　2018　IEEE.