Mains Chokes - Lenze i550-C0.25/120-1 Project Planning Manual

Mains chokes

Mains chokes reduce the effects of the inverter on the supplying mains.
The switching operations in the inverter cause high-frequency interferences that will be
transmitted unfiltered to the supplying mains. Mains chokes smooth the steep and pulse-like
curves coming from the Inverter and make them more sinusoidal. Moreover, the effective
mains current is reduced and thus energy is saved.
Mains chokes can be used without restrictions in conjunction with RFI filters.
Please note that the use of a mains choke reduces the mains voltage at the input of the
inverter. The typical voltage drop across the mains choke is around 4 % at its rated point.
For operation with the "Heavy Duty" load characteristic, inverters starting from
22 kW must always be used together with mains chokes. For operation with the
"Light Duty" load characteristic, please observe the information in the technical
data.
The matching assignment of these accessories is specified in the technical data
of the devices.
Accessories
Mains chokes
191