Calculate the level of transformer primary current

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Reference no: EM133818987

Question 1: A rectifier ammeter is to indicate full scale for a 1 A rms current. The PMMC instrument used has a 1200 Ω coil resistance and 500 μA FSD, and the current transformer has N_s = 7000 and Np = 10. Silicon diodes are used and the meter series resistance is R_s = 150 kΩ. Determine the required secondary shunt resistance value. Hire Writer Now!

Question 2: A rectifier ammeter has the following components: PMMC instrument with FSD = 200 μA and R_m= 900 Ω; current transformer with Ns= 600 and Np= 5; diodes with V_F ≈ 0.3 V; meter series resistance Rs= 270 kΩ; transformer shunt secondary resistance R_L = 98.7 kΩ. Calculate the level of transformer primary current for instrument FSD.

Reference no: EM133818987

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