Tham khảo tài liệu 'guide to ship repair estimates episode 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Table Electric motors Disconnecting motor from location transporting motor ashore to workshop for rewinding and on completion returning on board refitting in original position and reconnecting original cables. Receiving motor in workshop dismantling cutting out all stator coils removing rotor bearings and cleaning all parts. Forming new stator coils in copper wire assembling using new insulation and varnish. Baking dry in oven dip varnishing and rebaking in oven. Reassembling all parts fitting new standard type ball or roller bearings to rotor and testing in workshop. Capacity kW Man-hours 3 24 5 30 10 38 15 40 20 40 30 48 40 50 50 60 60 75 75 80 100 90 Notes Excluding rebalancing of rotor. These man-hours are for work on AC motors only and these are assumed to be single-speed squirrel-cage induction motors three-phase 380 440 volts 50 60 Hz 1440 1760 rpm and with Class B insulation. Excluding staging for access to location removals in way cleaning in way and cranage. Electrical works 71 Figure 15 A standard AC induction electrical motor Table Electric motors for winch windlass crane Disconnecting motor from location transporting motor ashore to workshop for rewinding and on completion returning on board refitting in original position and reconnecting original cables. Receiving motor in workshop dismantling cutting out all stator coils removing rotor bearings and cleaning all parts. Forming new stator coils for both stators in copper wire assembling using new insulation and varnish. Baking dry in oven dip varnishing and rebaking in oven. Reassembling all parts fitting new standard type ball or roller bearings to rotor and testing in workshop. 72 Guide to Ship Repair Estimates in Man-hours Capacity kW Man-hours 20 160 30 200 40 220 50 240 60 300 75 320 100 360 Notes These man-hours are for work on AC motors only and these are assumed to be triple-speed three-phase 380 440 volts 50 60 Hz double rotor stator squirrel-cage induction motors with integral brake .
