Three-phase electric power conditioner STEROGUARD

The protection against transient overvoltages generated by atmospheric discharges or by switching process is carried out by type 2 (cat. C) surge arresters complying with EN 61643-11/VDE 0675, part 6-11 characterised by a nominal discharge current (8/20) ln of 40 (or 60) kA, by a discharge current with Imax impulse of 50 (or 110) kA, a up protection level not greater than 1300 V and a response time tA shorter than 25 ns. ISOLATION TRANSFORMER This component, thanks to the electrostatic shield inserted between primary and secondary windings, ensures the galvanic separation and high attenuation of common mode noises. It is characterised by N delta-star configuration or F or N thermal class, low output impedance and insensitivity to the power factor. The insulation between primary and secondary, primary and shield, secondary and shield is greater than 3000 V during one minute. ELECTRODYNAMIC VOLTAGE REGULATOR It ensures the “true RMS” value of the voltage with ±1% output accuracy even in the presence of strong harmonic distortions. The innovative control circuit, combined with the structural reliability of the electrodynamic stabilisation system, has the following characteristics: response time from 6 to 40ms/Volt, depending on the model overload capacity 10 times the nominal voltage for 10 milliseconds, 5 times for 6 seconds, twice for 60 seconds efficiency of 97-98% insensitivity to load power factor and load variations insensitivity to mains frequency variations, in ±5% range harmonic distortion introduced lower than 0.2% under any operating condition (virtually zero)