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The two-wattmeter method is used to measure active power. The system is a 3-phase, 3- wire system. Then, the power reading is?

The two-wattmeter method is used to measure active power. The system is a 3-phase, 3- wire system. Then, the power reading is? Correct Answer Not affected by negative or zero sequence voltages

If the phase voltage is unbalanced, then the power reading is not affected by both negative as well as zero sequence voltages. This is a characteristic property of the 2 watt-meter meter since it measures the active power on a three phase three wire system.

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