... power supply and power distribution line. Features: 1) Rated power frequency voltage (kv) U0/U: 48/66, 64/110, 76/132, 138 ... ; 2) Max. Power frequency voltage (kv) um, 72.5, 126, 252; 3) Thunder impulse withstand ... voltage of sheath (kv): 37.5, 37.5, 47.5, and ...