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Inductive voltage divider of simple design for 120 V and 50 Hz to 30 kHz

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1 Author(s)
Zinkernagel, J. ; Phys. Tech. Bundesanstalt, Braunschweig, Germany

An inductive voltage divider (IVD) is presented, which-in spite of its simple design-meets the level of accuracy commonly needed in the field of ac-power measurement. The in-phase errors of about -(20±2) 10-6 achieved at the power frequency of 60 Hz, -(130±5) 10-6 at 4 kHz and +(70±35) 10-6 at 32 kHz can be considered adequate, considering that the determination of the power factor implies greater uncertainties at higher frequencies. The achievement is due to the build-up of the IVD using two cores, a suitable capacitance distribution and a special technique of screening which reduces the stray inductance of the windings

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Instrumentation and Measurement, IEEE Transactions on  (Volume:46 ,  Issue: 5 )