Power Electronics SD700FR low harmonic and regenerative drive obtains A and B1 compliance against the toughest symmetric and asymmetric voltage dips defined in IEC61000-4-34.
The new SW control provides nominal torque and power to the motor during voltage dips with a residual voltage over 70%. Thanks to the advanced front end rectifier of the IGBT’s, the drive is capable of automatically increasing the bus voltage and the input current to compensate for voltage dips in the line, ensuring that the power delivered to the motor remains at an acceptable value. This functionality allows facilities with unstable power networks or frequent dips, uninterrupted operation without harmful effects on their processes or machines.
Additionally, in the event of an input voltage less than 70%, the SD700FR drive will perform a controlled shutdown and will automatically provide a flying restart when the mains voltage is restored. The effects on the application depend only on the mechanical inertia of the system and avoid the problems with complex manual restarts or sudden stoppages.
Lalo Salvo, CTO of Power Electronics announces “Our products are at the forefront of technology thanks to the challenges our clients present us with and our R&D teams for overcoming these”.
 Depending on the residual voltage and according to the IEC/EN61800– 3 compliance criteria. For more info, consult Power Electronics.
 Overcurrent protection not activated during the voltage fluctuation. In case of tripping, the rectifier bridge will work as a diode bridge providing power to the motor proportional to the input voltage.