Power in a balanced three-phase system circuit isa.b.c.d.

Three equal impedances are first connected in delta across a three-phase balanced supply. If the same impedances are connected in star across the same supplya.phase current will be one-thirdb.line current will be one-thirdc.noned.power consumed will be one-third

A three-phase load is balanced if all the three phases have the samea.impedanceb.power factorc.impedance and power factord.none of the above

The sequence components of the current in an unbalanced system, with phasesequence A-B-C, is given as IA0 = 10300 A, IA1 = 5000 A and IA2 = 10–300 A, and thecorresponding sequence components of voltage are given as VA0 = 50600 V, VA1 =20000 V and VA2 = 100300 V.a) Calculate the current in phase B.b) Calculate the total active power and reactive power of the system.

n the Two wattmeter method of measuring power in a balanced three-phase circuit, one wattmeter shows zero and the other positive maximum. The load power factor is ___________

A balanced three-phase star-connected supply of phase sequence ABC feeds a balancedstar connected load of impedance 5025°Ω in each phase. Phase voltage of Phase A ismeasured to be 24030° V.a) Determine the magnitude and phase of each line current supplied by the source.b) Determine the active power and the reactive power supplied by the source.c) Determine the reactive power requirement of each of the three capacitances,connected in star, to improve the power factor to 0.95 lag.