PE Power Sample Problem 4

A 3-phase, 15kV/5kV, 𝛥-Y, 60Hz, 10MVA power distribution transformer has 5% per-unit leakage reactance and negligible resistance. The actual transformer impedance based on the ratings on its high voltage side is ____.
(A) 22.5Ω
(B) 2.5Ω
(C) 1.125Ω
(D) 0.125Ω

Wasim Asghar – P.E, P.ENG, M.ENG

Licensed Professional Engineer in Texas (PE), Florida (PE) and Ontario (P. Eng) with consulting experience in design, commissioning and plant engineering for clients in Energy, Mining and Infrastructure.