Motors100N - 250N models: Motors are IP44, class B insulation with ball bearings and safety thermal overload protection.315N model: motor is IP44, class F insulation with ball bearings ans safety thermal overload protection.355N and 400N models: Motors are IP54, class F, with ball bearings and safety thermal overload protection.Electrical supply:Single phase 230V-50/60Hz.Three phase 230/400V-50Hz(models 355N-T and 400N-T).(See characteristics chart).All single-phase models are speed controllable by tension.The three-phase models are speed controllable by frequency inverterAdditional InformationImpellers from 100 to 250 models are manufactured from injection moulded plastic.
