69 87 74 89 Efficiency at half speed (1)(2) % Number of poles (number of pairs of poles) 2 3 Cogging torque N.m 2.48 0.15 1.24 0.07 Phase résistance at 20° C Ohm Phase inductance (5) mH 21 1.24 12.7 0.7 Voltage at no load (back emf) at 20° (4) C V 346 305 330 285 Rotor inertia 10-3 Kg.m2 163 245 35 46 Weight Kg 2 4x1.5 4x10 4x1.5 4x10 Power cable square section (6) mm Input torque at half speed (1)(2) Rated Pow er at Half speed Rated Power at half speed (1)(2) Rated Power at Rated speed Rated speed Rated power (1)(2) Input torque at rated speed(1)(2) Efficiency at rated power (1)(2) Current at rated power (1) Voltage at rated power (1)(2)(3) Power cable diameter Alternator 400STK Power - Speed 35000 32500 Speed in RPM (1) Ambient temperature 40° C Wind speed 10 m/s cooling the housing Winding temperature rise < 100° C Stator housing in contact with the ambient air or integral on all its peripheral area with a metallic armature in contact with the ambient air Stator housing secured on a metallic frame getting an area equal to twice the cross section of the housing (2) Operation in sine wave mode with unity power factor (3) Line to line voltage. Voltage level may be adapted according to the application; please contact us (4) Line to line voltage, alternator at no load, rated speed and at 20° C (5) For current at rated power (6) For curents lower than 53 Amps, one cable For curents over 53 Amps, four single wires output (highlighted in the table) Automatique