A balance Y-connected load of ( 3 + j8 ) ohms per phase is supplied by a balanced three- phase, 60 Hz, positive phase sequence source. If VBC = 133.6998 + j159.3372 volts, determine the following: (Answers in complex numbers must be expressed in POLAR FORM) а. VAB b. VCA c. Line current lA d. Line current IB e. Line current Ic f. Total real power of the load g. Total reactive power of the load
A balance Y-connected load of ( 3 + j8 ) ohms per phase is supplied by a balanced three- phase, 60 Hz, positive phase sequence source. If VBC = 133.6998 + j159.3372 volts, determine the following: (Answers in complex numbers must be expressed in POLAR FORM) а. VAB b. VCA c. Line current lA d. Line current IB e. Line current Ic f. Total real power of the load g. Total reactive power of the load
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ISBN:9780133923605
Author:Robert L. Boylestad
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Transcribed Image Text:A balance Y-connected load of ( 3 + j8 ) ohms per phase is supplied by a balanced three-
phase, 60 Hz, positive phase sequence source. If VBc = 133.6998 + j159.3372 volts,
determine the following: (Answers in complex numbers must be expressed in POLAR FORM)
а. VAB
b. VCA
c. Line current lA
d. Line current IB
e. Line current lc
f. Total real power of the load
g. Total reactive power of the load
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A TWO-WATTMETER method is used to measure the total real power of the load in Problem , where wattmeter W1 is connected in line A and W2 is connected in line C. Line B being the common tapping point of the voltage coils of W1 and W2. Determine thefollowing:
a. Reading of wattmeter W1
b. Reading of wattmeter W2
c. If a third wattmeter W3 is connected to line B and the two ends of the voltage coils are
connected to lines C and A, what is its reading?
d. If the result in Part C is multiplied by 1.732 or square root of 3, what does this value
represents?
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