ABB Drive ACS 355

Line side power conditioning for AC motor controls to prevent unwanted harmonics and nuisance drive trips as well as to prevent excess current during line disturbances that can damage power semi-conductors. There should be a minimum impedance associated with the drive using either AC or DC magnetics. In many applications, this impedance can come from a supply transformer, or if long enough, the supply cable themselves. In most cases, however, the use of an additional input reactor is recommended.

– If any of the following conditions exist use of at least a 3% line reactor is recommended: v
– Installation has voltage spikes in excess of 6000V peak or lightning strikes.v
– Installation has switched power factor correction capacitors.
– Installation has power interruptions or voltage sags in excess of 200Vac.
– When the distribution system kVA is more than 10 times larger than the drive kVA .