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Question 1 An unbalanced, 3Ø, 4-wire, Y-connected load is connected to 380 V symmetrical supply. (a) Draw the phasor diagram and calculate the readings on the 3-wattmeters if a wattmeter is connected in each line of the load. Use Ebn as reference with a positive phase sequence. The phase impedances are the following: Za = 45.5 ∟36.6 Ω Zb = 25.5 ∟-45.5 Ω Zc = 36.5 ∟25.5 Ω [18] (b) Calculate the total wattmeter’s reading
ASSESSMENT 2 ELE3601 2022 Question 1 An unbalanced, 30, 4-wire, Y-connected load is connected to 380 V symmetrical supply. (a) Draw the phasor diagram and calculate the readings on the 3-wattmeters if a wattmeter is connected in each line of the load. Use Ebn as reference with a positive phase sequence. The phase impedances are the following: Za = 45.5 L 36.6 22 Zb = 25.5 L-45.5 12 Zc = 36.5 L 25.5 22 [18] (b) Calculate the total wattmeter's reading [2]