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What is the meaning of positive, negative and zero sequence components of voltage or current?
And what does the zero sequence component represent?
The zero sequence represents the three-phase system in an unbalanced condition, where the magnitudes and phase angles of the three voltages or currents are all equal to zero. This can be caused by a ground fault or a neutral conductor that is not properly connected. The presence of a zero sequence current is an indication of an unbalanced source or load, and it can cause problems such as overloading, overheating, and insulation breakdown.