Output Reactor for Variable-Frequency Drive Lines
The Siemens SIDAC 4EU2752-0ER00-4BA0 is a 3-phase AC output reactor rated for 110 A maximum at a switching frequency of 4 000 Hz, with an inductance of 0.0002 H. It is designed to sit between a variable-frequency drive and the motor, smoothing the PWM waveform and limiting the rate of voltage rise (dV/dt) that can cause winding stress or bearing fluting on long cable runs. Thermal class H insulation (IEC 60085) allows continuous winding temperatures up to 180 °C, giving headroom in high-ambient or overloaded conditions.
The 110 A maximum current governs the motor full-load current it can handle — size the reactor so the motor's FLC does not exceed this figure at the drive's switching frequency. The 4 000 Hz rated value is the carrier (switching) frequency the reactor is characterized at; running a drive with a lower switching frequency is fine, but exceeding 4 kHz may increase core losses beyond the 142 W iron loss figure. The 0.0002 H inductance is relatively low — typical for output reactors on higher-frequency PWM drives where a small inductance is enough to limit dV/dt without dropping excessive voltage across the reactor at the fundamental motor frequency. The 141 W coil loss plus 142 W iron loss total about 283 W of heat to dissipate inside the enclosure; factor that into the panel's thermal budget.
Physical Integration
Dimensions are 0.27 m wide, 0.24 m tall, and 0.18 m deep. The IP00 rating means no ingress protection — mount it inside a cabinet with at least IP54 to keep conductive dust and moisture off the windings. Flat-type connectors on the main current circuit; plan for bus-bar or compression-lug terminations rather than ring-tongue or spring-cage terminals. The 40 °C rated ambient temperature is the reference for the loss figures; derate current if ambient exceeds that.