YB-substation is a kind of per-fabricatethat assembles the MV switch apparatus, transformer, LV distribution equipment together according to fixed connection scheme. This series substation is suitable forneighborhood unit,hotel, largescale work site and high building that the voltage is 12KV/24KV/36KV/40.5KV, the frequency is 50Hz/60Hz and the capacity is under 2500kVA.