bejoyengineer
Member
CTs are connected in star on T/F delta connected winding side & in delta on T/F star connected winding side for T/F differential protection and the reason
is to eliminate zero sequence current for avioding the differential relay from operating.but i am confused when we say that the Wye connected formula is
Iline=Iphase and Delta connected formula is Iline = 1.73 * Iphase
so if these formulas are applied ,then will this actually effect the current value of the secondary CT there by activating the differential relay. Thanks in advance
is to eliminate zero sequence current for avioding the differential relay from operating.but i am confused when we say that the Wye connected formula is
Iline=Iphase and Delta connected formula is Iline = 1.73 * Iphase
so if these formulas are applied ,then will this actually effect the current value of the secondary CT there by activating the differential relay. Thanks in advance