<P> In electrical engineering , three - phase electric power systems have at least three conductors carrying alternating current voltages that are offset in time by one - third of the period . A three - phase system may be arranged in delta ( ∆ ) or star ( Y ) ( also denoted as wye in some areas ) . A wye system allows the use of two different voltages from all three phases , such as a 230 / 400 V system which provides 230 V between the neutral ( centre hub ) and any one of the phases , and 400 V across any two phases . A delta system arrangement only provides one voltage magnitude , however it has a greater redundancy as it may continue to operate normally with one of the three supply windings offline , albeit at 57.7 % of total capacity . Harmonic current in the neutral may become very large if non-linear loads are connected . </P>
<P> In electrical engineering , three - phase electric power systems have at least three conductors carrying alternating current voltages that are offset in time by one - third of the period . A three - phase system may be arranged in delta ( ∆ ) or star ( Y ) ( also denoted as wye in some areas ) . A wye system allows the use of two different voltages from all three phases , such as a 230 / 400 V system which provides 230 V between the neutral ( centre hub ) and any one of the phases , and 400 V across any two phases . A delta system arrangement only provides one voltage magnitude , however it has a greater redundancy as it may continue to operate normally with one of the three supply windings offline , albeit at 57.7 % of total capacity . Harmonic current in the neutral may become very large if non-linear loads are connected . </P>
what is the neutral current in a 3 phase system
what is the neutral current in a 3 phase system
centre hub
centre hub