... are in total-sealed design and fan cooled type, squirrel cage type and novel in design and nice in appearance, ... starting performance, easy maintaince, etc This series motors adopt F class insulation and designed as the insulation system assessing method ... Rated frequency: 50Hz or 60HzInsulation class: FProtection type:IP54 or IP55Cooling type:IC411Duty type: S1 There are three kinds of installation ...