a. Draw the phasor diagram
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:
Za = 45.5 ∟36.6 Ω
Zb = 25.5 ∟-45.5 Ω
Zc = 36.5 ∟25.5 Ω
- An Unbalanced 3o 4 Wire Y Connected Load Is Connected To 380 V Symmetrical Supply A Draw The Phasor Diagram B Calc 1 (42.43 KiB) Viewed 44 times
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 22 Zb = 25.5 L-45.5 22 Zc = 36.5 L 25.5 22 (c) ) Calculate the total wattmeter's reading [2]