Back to projects Working drawings of 220 kV OHTL from Mandalgove to Arvaikheer and 220/110/35 kV 2*125MVA substation 2022 Substation & OHTL 📍 Uvurkhangai, Mandalgovi 220kV 287km OHTL, 110kV 4.7km OHTL, 220/110/35 kV 2*125MVA substation.