What this choke does on the line
The Siemens 4EU2522-0EA00-0AA0 is a 3-phase commutating choke (line reactor) for converter drives. It limits current rise and reduces harmonic distortion on the AC line feeding the drive. Rated 185 A maximum at 60 Hz, with a continuous rated current of 166.5 A at 460 V AC. The 0.17 mH inductance and 4 % voltage drop (relative inductive drop) are sized to smooth commutation notches without excessive voltage sag under load.
Sizing and thermal limits
The choke carries a DC rated current of 226.7 A — useful when the converter draws a DC-link ripple component. Thermal class H per IEC 60085 means the winding insulation withstands 180 °C hot-spot temperature, with the ambient rating at 40 °C. IP00 enclosure means it is an open-frame component for cabinet mounting only — no touch protection, no washdown tolerance. Flat-type terminals accept busbar or cable lug connections typical of power distribution in drive panels.
Physical fit in the panel
Dimensions: 0.225 m wide, 0.21 m tall, 0.16 m deep. The flat-type terminals suit busbar connection. IP00 means no ingress protection; the choke must be inside a sealed enclosure.