Isolation Filter

Desciption:In installations with 3rd harmonic generation loads, the current through the neutral cable can be higher than the one in the phases, even in case of balanced loads.The most proper solution for these problems is to use a specific equipment for the 3rd harmonic filtering, consisting basically in a three-phase isolating transformer, delta-star connected, that filters the 3rd harmonic current, plus a passive filter which reduces the 5th harmonic.