Three Phase Power Measurement            

The input power to a 3-phase a.c. motor is measured as 5kW. If the voltage and current to the motor are 400V and 8.6A respectively, determine the power factor of the system?
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Two watt meters are connected to measure the input power to a balanced 3-phase load by the two watt meter method. If the instrument readings are 8kW and 4kW, determine the load power factor.
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The total number of phase sequences in a three phase AC system is

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Three loads, each of resistance 30, are connected in star to a 415 V, 3-phase supply. Determine(a) the system phase voltage, (b) the phase current
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By using two watt meter method, power can be measured in
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The two watt meter method is applicable for
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