B602 series is special for small size:0.5HP~1.5HP,single phase 220V,intelligent constant ... booster pump controller which is special for small size:0.5HP~1.5HP,single phase 220V,intelligent constant pressure ... :Single phase 220V input,3 phase 220V output: 0.5HP-1.5HP(0.37KW-1.1KW)Advantages:special for small ... pump size:0.5HP~1.5HP,single phase 220V,intelligent constant ...