Rexnord-Stephan S4 Catalogue

04-2007 3P0200-XX7. Technical Appendix7.3.9 50-Hz motors on a 60-Hz supply systemMotors dimensioned for 50 Hz can also be operated on 60-Hz supply networks without any problems. In this case,the rated speed increases by 20%. At the same time, current and power factor remain unchanged. The additionalinformation can be found in the table.Motor winding 50 Hz Connection to 60 Hz Power TorquePT400 V ± 10 % 380/400 V ± 5 % 50 Hz 0.90 x P(50 Hz) 0.75 x T(50 Hz)400 V ± 10 % 400 V -10 % / + 25 % 1.00 x P(50 Hz) 0.83 x T(50 Hz)400 V ± 10 % 440 V -10 % / +15 % 1.10 x P(50 Hz) 0.92 x T(50 Hz)400 V ± 10 % 460 V ± 10 % 1.15 x P(50 Hz) 0.96 x T(50 Hz)400 V ± 10 % 480 V - 10 % + 5% 1.20 x P(50 Hz) 1.00 x T(50 Hz)500 V ± 10 % 500 V -10 % / + 25 % 1.00 x P(50 Hz) 0.83 x T(50 Hz)500 V ± 10 % 575 V ± 10 % 1.15 x P(50 Hz) 0.96 x T(50 Hz)7.3.10 Operation with inverterThe operation of three-phase AC induction motors with frequency inverter (variable voltage and frequency) causesstray losses in the motor. For this reason, it is generally required to reduce the rated torque of the motors so thatthe permissible winding temperature is not exceeded. An additional reduction of the output is required due to reducedmotor speed and, therefore, reduced self-cooling. The output reduction is dependent upon the torque demandof the driven machine and the speed setting range.For vertical versions with tubing (SCA, SFA, SCP), the output speed ranges according to chapter 7.4.7 must betaken into account. In case of doubt, a consultation with our plant is required.High speedsStandard motors can generally also be operated above their rated speed. If standard motors must be operatedwith frequencies above 60 Hz, please consult our plant.Power tablesRated powers of 4-pole motors from the Rexnord-Stephan series are listed for various applications. Data for otherpole numbers are available upon request.The powers apply to correctly installed frequency inverters with characteristics of column A or B.ABComplete harmonic distortion < 2.5% < 6%Maximum peak voltage 1600 V 1400 VMax. voltage rise du / dt 1.0 kV / s 5.6 kV / sMax. carrier switching frequency 5 kHz 5 kHzMax. motor to inverter cable length 30 m 60 MT24