A.、2.5% B.、5% C.、10% D.、5%或10%
A.、35~220KV,6~10KV,220/380V B.、10~35KV,3~6KV,220/380V C.、35~220KV,3~6KV,380/660V D.、110~220KV,10~35KV,220/380V