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Sine wave frequency converters

NFO Sinus sine wave frequency converters control the speed of AC induction motors with a pure sine-wave output voltage instead of PWM pulses. They are therefore installed with ordinary unshielded cable, without EMC filters, at any distance from the motor, generate no bearing currents and have an earth leakage current below 2 mA – 30 mA residual current devices can be used.

The NFO Sinus Optimal range, made in Sweden by NFO Drives, covers motors from 1.5 kW (single-phase 230 V supply) to 18.5 kW (three-phase 400 V supply) and is used on pumps, fans, fountains, farms, hospitals and in industry. Read how NFO Sinus technology works and how it compares with PWM drives.