Siemens 1PH8286-1AF10-2BU2 SIMOTICS M-1PH8 Compact Asynchronous Motor 250kW 1500 r/min IP55

The Siemens 1PH8286-1AF10-2BU2 is a SIMOTICS M-1PH8 compact asynchronous motor rated 250 kW and 1592 Nm at 1500 r/min, extending to 310 kW at 2000 r/min in the field-weakening range. Built to IP55 with forced ventilation (NDE to DE), it has a 280 mm shaft height, carries a Pt1000 temperature sensor with no encoder, and weighs 1400 kg.

Technical Specifications

Selection Notes

The IP55 enclosure and forced ventilation on the 1PH8286-1AF10-2BU2 suit installations with dust, moisture, or washdown exposure that an open-circuit-cooled winding in the same 280 mm frame cannot tolerate. Continuous output is 250 kW at 1500 r/min, rising to 310 kW once the field-weakening range is reached on a 480 V supply. Its 50-minute thermal time constant gives more margin against transient overload than the shorter time constant typical of an open-circuit-ventilated sibling in the same frame. The 1500 r/min base speed suits higher-speed loads better than the 1000 r/min winding available in the same frame.