A.0.45 B.0.40~0.61 C.0.52 D.0.90
A.0.35~0.45 B.0.50~0.70 C.0.65~0.75 D.0.60~0.70
A.一級負荷中特別重要負荷 B.一級負荷 C.二級負荷 D.三級負荷