73.CRH2型动车组单相400V电源经逆变器装置变换为( )的电源提供给压缩机。[222020101]
A.(A)三相30Hz/125V~70Hz/200V
B.(B)单相30Hz/125V~70Hz/200V
C.(C)单相40Hz/125V~70Hz/200V
D.(D)三相40Hz/125V~70Hz/200V
正确答案是D
73.CRH2型动车组单相400V电源经逆变器装置变换为( )的电源提供给压缩机。[222020101]
A.(A)三相30Hz/125V~70Hz/200V
B.(B)单相30Hz/125V~70Hz/200V
C.(C)单相40Hz/125V~70Hz/200V
D.(D)三相40Hz/125V~70Hz/200V
正确答案是D