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Apparent power transducer for three-phase three-wire system

Apparent power transducer for three-phase three-wire system

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In a newly developed transducer apparent power is measured by using a multiplier, in which the AC component of the output is used. For a three-phase three-wire system, two multipliers are used according to the so-called ‘two wattmeter’ method. The AC output components are +30° and –30° phase-shifted, respectively, and then the difference is converted to a DC signal which corresponds to the total apparent power.

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