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In three-phase power measurement in a delta-connected load using 2 watt meters, when the power factor of the load is zero, readings of 2 watt meters will be __________.

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Option 2 :  and 
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Two Wattmeter Method of Power Measurement

The wattmeter meter readings are:

where, 

The power factor is given by cosϕ.

Calculation:

Given, cosϕ = 0 ⇒ ϕ = 90°

If we multiply both W1 and W2 by √3, then:

 and 

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More Measurement of AC Power Questions

Q1.Which connection method is correct when using a CT and PT with a wattmeter?
Q2.In three-phase power measurement in a delta-connected load using 2 watt meters, when the power factor of the load is zero, readings of 2 watt meters will be __________.
Q3.In a power measurement by two-wattmeter method, the wattmeters read W1 = 200 W and W2 = -200 W. Find the power factor.
Q4.In a three-phase system, power is measured by two wattmeter method. If the reading of the wattmeters are +1000 W and -1000 W, then which of the following is correct?
Q5.In the two-wattmeter method of three phase power measurement, if the readings of two wattmeters are WI = 200 Watts and W2 = -200 Watts, then the operating power factor of the load is equal to:
Q6.Power measured using 2 wattmeter method from a three-phase balanced/unbalanced load where line voltage = VP, Line current = VL, Phase voltage = VP and Phase current = lP is given by:
Q7.Total Reactive Power drawn from a three-phase balanced load where line voltage = VL, Line current = IL, Phase voltage = VP and Phase current = lP is given by:
Q8.Which one of the following methods measures power in three-phase AC circuits, with both, balanced and unbalanced load?
Q9.Which condition is created by two wattmeters W1 and W2 for power factor is zero? 
Q10.In 3 phase power measurement by two watt meter methods reading can be same in both wattmeters then the power factor is____. 

More Measurement of Power Questions

Q1.Which connection method is correct when using a CT and PT with a wattmeter?
Q2.In three-phase power measurement in a delta-connected load using 2 watt meters, when the power factor of the load is zero, readings of 2 watt meters will be __________.
Q3.Two wattmeter readings in power measurement of a three-phase balanced lagging load were 2000 W and 1000 W. What is the reactive power in VAr of the load?
Q4.In a power measurement by two-wattmeter method, the wattmeters read W1 = 200 W and W2 = -200 W. Find the power factor.
Q5.In a three-phase system, power is measured by two wattmeter method. If the reading of the wattmeters are +1000 W and -1000 W, then which of the following is correct?
Q6.Two wattmeters are connected to measure power in a three-phase system. Reading of one of the wattmeter is zero. Then power factor of the three-phase load is:
Q7.In the two-wattmeter method of three phase power measurement, if the readings of two wattmeters are WI = 200 Watts and W2 = -200 Watts, then the operating power factor of the load is equal to:
Q8.The power of a n - phase circuit can be measured by using a minimum of
Q9.Two wattmeter method appropriate for measurement of power in three phase circuits and is applicable for _________ loads both balanced and unbalanced. 
Q10.Two wattmeter method is used to measure the power in a 3-phase system. When both meters are normally phased, the meter readings are 2400 W and 1260 W. What is the load power?
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