Question 1 An Unbalanced 30 4 Wire Y Connected Load Is Connected To 380 V Symmetrical Supply A B Draw The Phasor 1 (48.77 KiB) Viewed 27 times
Question 1 An unbalanced, 3Ø, 4-wire, Y-connected load is connected to 380 V symmetrical supply. (a) Draw the phasor diagram [6] (b) 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: [12] Za = 45.5 ∟36.6 Ω Zb = 25.5 ∟-45.5 Ω Zc = 36.5 ∟25.5 Ω (c) Calculate the total wattmeter’s reading Question 1 An unbalanced, 30, 4-wire, Y-connected load is connected to 380 V symmetrical supply. (a) (b) Draw the phasor diagram [6] 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: [12] Za = 45.5 L 36.6 12 Zb = 25.5 L-45.5 2 = Zc = 36.5 L 25.5 22 (c) Calculate the total wattmeter's reading [2] Total (20)
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