MICROMASTER 4 commutation choke 200V-480V 3AC 4.8A substructure FSA-3x 1.53MH not substructure for V20 Electrical choke SINAMICS line choke (substructure component) for the SINAMICS G120C compact converter and the SINAMICS S110 servo converter. The line choke increases the converter's protection against overvoltages, harmonics and commutation dips. In order not to reduce the service life of a converter, a line choke is required if the relative short-circuit voltage uk of the line transformer is < 1%. The line choke covers the single-phase voltage range from 200 V to 240 V and the three-phase voltage range from 200 V to 600 V. It is available as a substructure for frame sizes FSA to FSD and as a stand-alone version for frame size FSF. The line reactor as a substructure component is available in frame size FSAA in a three-phase voltage range between 380 V and 480 V and in a power range between 0.55 kW and 1.5 kW. SINAMICS - simply my drive.