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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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MPPGCL JE Electrical 28 April 2023 Shift 3 Official Paper
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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.
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Q1.Which connection method is correct when using a CT and PT with a wattmeter?
Q2.The power in a 3phase circuit is measured with the help of 2 wattmeters. The reading of one of wattmeters is positive and that of the others is negative. The magnitude of readings is different. It can be concluded that the power factor of the circuit is 
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Q4.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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Q6.In a power measurement by two-wattmeter method, the wattmeters read W1 = 200 W and W2 = -200 W. Find the power factor.
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