A.110kV B.220kV C.330kV D.500kV
A.0.1s~0.2s B.0.2s~0.3s C.0.3s~0.4s D.0.3s~0.5s
A.35kV~220kV B.66kV~220kV C.110kV~330kV D.110kV~500kV