Siemens 4EU3032-0MQ08-0AA0 – 50 kVAR Filter Reactor, 660 V
The Siemens 4EU3032-0MQ08-0AA0 is a 3-phase filter reactor rated 50 kVAR at 660 V and 50 Hz, with 7 % impedance and a 189 Hz resonant frequency. It is designed to attenuate harmonic currents in power-factor-correction and drive line-ups, built to EN 61558-2-20. The IP00 enclosure and flat-type terminals mean it mounts inside a panel or cabinet — not outdoors, not touch-safe without an enclosure around it.
50 kVAR at 660 V sets the reactive-power compensation capacity — sized for a bank of capacitors or a drive DC bus of that kVAR class. The 7 % impedance (P(%):7) is the standard detuning figure: it shifts the resonant point below the 5th harmonic (250 Hz at 50 Hz fundamental), so the 189 Hz resonance (FRES(HZ):189) sits safely between the 3rd and 5th harmonics. That keeps the reactor from amplifying the harmonics it is meant to suppress. The ripple voltage spec (RIPPLE VOLT. (%):110 /0 /6 /5) describes the voltage distortion the reactor can handle across its terminals under rated conditions — relevant when sizing for a drive with high switching-frequency content.
IP00 means no ingress protection — the reactor must be installed inside a cabinet with at least IP2X or better, depending on the environment. Flat-type terminals accept lug or busbar connections; plan for cable entry and bending radius above the terminal block. The 189 Hz resonance is fixed, so verify that the system's dominant harmonic order (typically 5th for 6-pulse drives) does not coincide with this frequency — it does not, but a harmonic study is cheap insurance before committing the panel layout.