Low Zero Sequence and Phase Shifting Autotransformers

Neutral Current Eliminator is a 3-phase, low zero sequence impedance autotransformer, which when connected near to and in parallel with the harmonic generating non-linear loads, provides an alternate path for 3rd, 9th, & 15th current harmonics (triplens) which the loads create.

Field Adjustable Impedance (FAI) feature allows for adjustment of zero sequence impedance to field conditions.

This devices reduces neutral current and neutral-to-ground voltage as well as both current and voltage triplen harmonic distortion.

A Combined Neutral Current Eliminator is a phase shifting autotransformer with a low zero sequence impedance at its output. When connected in series on a 3-phase, 4-wire service to non-linear loads, it provides an alternate path for the triplen harmonics. The CNCE also phase shifts 5th and 7th current harmonics by 180º so that they cancel with 5th and 7th harmonics from other loads on the distribution system. Optional FAI feature allows for removal of triplens from the input side as well as secondary.

It reduces neutral current, and neutral-to-ground voltage, as well as both current and voltage harmonic distortion at 3rd, 5th, 7th, & 9th harmonics.

MIRUS International, Inc., 801 Sheppard Ave. W., Toronto, ON M3H 2T3. Tel: 416-633-2600; Fax: 416-633-2613.